Oil filtering material, preparation method and application thereof

Abstract

The present disclosure relates to an oil filtering material, a preparation method and application thereof, and the raw materials of the oil filtering material include, in terms of mass percentage, 30-60% of water-absorbing material, 30-60% of thermoplastic elastomer material, 5-10% of compatibilizer and 1-5% of inorganic filler. The preparation method includes: mixing a certain proportion of the water-absorbing material, the thermoplastic elastomer material, the compatibilizer and the inorganic filler to obtain a mixture; plasticizing the mixture to obtain a melt; vulcanizing the melt to obtain a vulcanizate; crushing the vulcanizate to obtain a water-absorbing swelling material; uniformly laying the water-absorbing swelling material on a porous material and performing hot-pressing compounding to obtain the oil filtering material. The oil filtering material, the preparation method and application thereof have low cost, simple preparation process, and can improve the filtering effect of oil, especially vehicle ethanol gasoline, and prolong the service life of the oil filtering material.

Description

Technical Field

[0001] This disclosure relates to the field of oil processing technology, and in particular to an oil filtration material, its preparation method, and its application. Background Technology

[0002] Oil products, such as gasoline, diesel, and kerosene, require various processing measures to ensure their quality meets standards.

[0003] The conventional method for filtering gasoline and diesel fuel at gas stations is to use porous filter materials such as filter paper, stainless steel mesh, and non-woven fabric to separate impurities from the fuel. The pore size is generally less than 37μm (with a positive or negative deviation of no more than 5μm), and these materials are replaced promptly as needed. While these porous filter materials can filter out mechanical impurities in the fuel, they cannot filter out water.

[0004] To address the aforementioned technical problems, existing technologies have proposed various filter materials for filtering water from fuels. However, each filter material has its own unresolved issues. For example, filter materials designed for regular gasoline are ineffective when applied to ethanol gasoline because of the miscibility of ethanol and water. Furthermore, filter materials designed for ethanol gasoline are prone to leaching under the long-term action of water, which can affect fuel quality.

[0005] Therefore, how to improve the long-term stable filtration effect of oil filtration materials, especially for ethanol gasoline in vehicles, has become an urgent problem to be solved. Summary of the Invention

[0006] In view of this, the present disclosure provides an oil filter material, a preparation method thereof, and its application, which improves the filtration effect of oil, especially ethanol gasoline for vehicles, and extends the service life of the oil filter material.

[0007] The technical solution disclosed herein is implemented as follows:

[0008] According to one aspect of the embodiments of this disclosure, an oil filtration material is provided, wherein the raw materials are measured by mass percentage and include:

[0009] Absorbent material 30% to 60%;

[0010] Thermoplastic elastomer materials: 30% to 60%;

[0011] Compatibilizer 5% to 10%;

[0012] Inorganic fillers: 1% to 5%.

[0013] Furthermore, the absorbent material is at least one of hydroxypropyl methylcellulose, hydroxyethyl methylcellulose, ethyl cellulose, sodium carboxymethyl cellulose, sodium polyacrylate, and polyethylene oxide;

[0014] The thermoplastic elastomer material is at least one of nylon, nitrile rubber, thermoplastic polyurethane elastomer, polyolefin elastomer, and ethylene-vinyl acetate copolymer;

[0015] The compatibilizer is at least one of polyethylene glycol 2000, polyethylene glycol 4000, and polyethylene glycol 6000;

[0016] The inorganic filler is at least one of silica, bentonite, diatomite, and montmorillonite.

[0017] According to another aspect of the embodiments of this disclosure, a method for preparing an oil filtration material is provided, comprising:

[0018] A mixture is obtained by mixing the water-absorbing material, the thermoplastic elastomer material, the compatibilizer and the inorganic filler in a certain proportion;

[0019] The mixture is then plasticized to obtain a melt;

[0020] The melt is sulfided to obtain a sulfide;

[0021] The sulfide was crushed to obtain a water-absorbing and swelling material;

[0022] The water-absorbing and swelling material is evenly spread on a porous material and then hot-pressed to obtain the oil filter material.

[0023] Furthermore, the mixing of a certain proportion of the absorbent material, the thermoplastic elastomer material, the compatibilizer, and the inorganic filler includes:

[0024] The absorbent material, the thermoplastic elastomer material, the compatibilizer, and the inorganic filler are placed in a high-speed mixer and stirred for 5 to 10 minutes.

[0025] Further, the plasticizing of the mixture includes:

[0026] The mixture is placed in a rubber mixing mill for plasticizing, wherein during the plasticizing process, the rotation speed of the rubber mixing mill is 10 to 20 revolutions per minute, the plasticizing temperature is 100°C to 160°C, and the plasticizing time is 5 to 20 minutes.

[0027] Furthermore, the vulcanization of the melt includes:

[0028] The molten material is placed on a flat vulcanizing machine for vulcanization, wherein the vulcanization temperature is 100°C to 150°C, the vulcanization time is 5 minutes to 10 minutes, and the pressure is 0.3 MPa to 0.8 MPa.

[0029] Furthermore, the step of pulverizing the sulfide includes:

[0030] The sulfide is cooled and pelletized to obtain the water-absorbing and swelling material in coarse particle form;

[0031] The coarse-particle-shaped water-absorbing and swelling material is crushed;

[0032] According to preset conditions, the material is sieved using a sieve with a mesh size of 10 to 200 to obtain the water-absorbing and expanding material that meets the preset particle size requirements.

[0033] Furthermore, the porous material is at least one of nonwoven fabric and filter paper.

[0034] Furthermore, the step of uniformly spreading the water-absorbing and swelling material onto a porous material and then hot-pressing it to obtain the oil filter material includes:

[0035] The water-absorbing and swelling material is evenly laid on the porous material using a fabric spreader, wherein the net mass of the water-absorbing and swelling material on the porous material is 400 g / m² to 1200 g / m².

[0036] The water-absorbing and swelling material and the porous material are hot-pressed together to obtain the oil filter material. The hot-pressing temperature is 100°C to 200°C, the hot-pressing pressure is 0.05 MPa to 0.3 MPa, and the hot-pressing time is 1 minute to 5 minutes.

[0037] According to another aspect of the present disclosure, an application of an oil filter material prepared by the preparation method described above in a fuel dispenser filter is provided.

[0038] The oil filter material, its preparation method, and its application disclosed herein are characterized by low cost and simple preparation process. The method involves physical blending of various materials using a rubber mixing mill and a flat vulcanizing mill, resulting in an interpenetrating cross-linked network between the thermoplastic elastomer and the water-absorbing material in the oil filter material. This stabilizes the molecular structure of the oil filter material. The addition of a compatibilizer containing hydrophobic methylene groups and hydrophilic hydroxyl groups enhances the compatibility between the thermoplastic elastomer and the superabsorbent material, ensuring that the water-absorbing material does not easily detach during oil-water separation. This invention addresses the problem of water-absorbing materials easily detaching during oil-water separation. The compatibilizer in this disclosure contains numerous -CH2-CH2-O- segments on its molecular backbone. These segments have a strong water-absorbing effect on water molecules, accelerating the water absorption rate of the oil filter material and more easily forming strong hydrogen bonds with water molecules, thus improving the water absorption performance of the oil filter material. This disclosure utilizes rigid particle inorganic fillers to enhance the mechanical strength of the oil filter material, resulting in better pressure resistance of the hydrogel formed after water absorption, thereby enhancing the water absorption, water-stopping, and oil-blocking properties of the oil filter material. The oil filter material of this disclosure contains a large number of hydroxyl groups; therefore, the hydrogen bonding force between the oil filter material and water molecules is much greater than that with ethanol. Simultaneously, it is insoluble in non-polar solutions such as gasoline, diesel, and ethanol. Therefore, this oil filter material can absorb water molecules in ethanol gasoline and is suitable for filtering water in ethanol gasoline. The oil filter material of this disclosure can improve the filtration effect of oils, especially automotive ethanol gasoline, and extend the service life of the oil filter material.

[0039] The oil filter material prepared by the method disclosed herein, when applied to fuel dispenser filters, can instantly absorb water in various states, including free water, water-in-oil, and oil-in-water, effectively preventing water from passing through the fuel dispenser. It also possesses strong water retention capacity, remaining water-free even under high pressure. When the oil filter material absorbs a certain amount of water, it forms a high-strength hydrogel, simultaneously reducing the pore size until it is completely sealed. This prevents water from passing through the filter element, reduces the refueling flow rate, provides an early warning function for refueling operators, and ultimately achieves the effects of absorbing and stopping water and preventing oil leakage, providing oil quality and safety assurance for simultaneous refueling and unloading operations at gas stations. Attached Figure Description

[0040] Figure 1 This is a flowchart illustrating a method for preparing oil filter materials according to a specific embodiment;

[0041] Figure 2 This is a schematic diagram of the apparatus structure for performing dynamic water absorption and water-stopping performance tests and dynamic water absorption and oil-blocking performance tests, according to an illustrative embodiment. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of this disclosure clearer, the following detailed description is provided with reference to the accompanying drawings and embodiments.

[0043] It should be noted that the endpoints and any values ​​of the numerical ranges disclosed in this disclosure are not limited to the precise ranges or values; these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of various ranges, the endpoint values ​​of various ranges and individual point values, and individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered as specifically disclosed in this disclosure. Unless otherwise stated, the numerical ranges in this disclosure include not only the entire range within its two endpoints but also any subranges contained therein.

[0044] This disclosure provides an oil filtration material, wherein the raw materials of the oil filtration material are measured by mass percentage and include:

[0045] Absorbent material 30% to 60%;

[0046] Thermoplastic elastomer materials: 30% to 60%;

[0047] Compatibilizer 5% to 10%;

[0048] Inorganic fillers: 1% to 5%.

[0049] In some embodiments, the absorbent material is at least one of hydroxypropyl methylcellulose, hydroxyethyl methylcellulose, ethyl cellulose, sodium carboxymethyl cellulose, sodium polyacrylate, and polyethylene oxide.

[0050] For example, the absorbent material can be hydroxypropyl methylcellulose, or hydroxyethyl methylcellulose, or ethyl cellulose, or sodium carboxymethyl cellulose, or sodium polyacrylate, or polyethylene oxide, or a mixture of hydroxypropyl methylcellulose and hydroxyethyl methylcellulose, or a mixture of hydroxypropyl methylcellulose and ethyl cellulose, or a mixture of hydroxypropyl methylcellulose and sodium carboxymethyl cellulose, or a mixture of hydroxypropyl methylcellulose and sodium polyacrylate, or a mixture of hydroxypropyl methylcellulose and polyethylene oxide, or a mixture of hydroxyethyl methylcellulose and ethyl cellulose, or a mixture of hydroxyethyl methylcellulose and sodium carboxymethyl cellulose, or a mixture of hydroxyethyl methylcellulose and sodium polyacrylate, or hydroxyethyl... A mixture of hydroxypropyl methylcellulose and polyethylene oxide, or a mixture of ethyl cellulose and sodium carboxymethyl cellulose, or a mixture of ethyl cellulose and sodium polyacrylate, or a mixture of ethyl cellulose and polyethylene oxide, or a mixture of sodium carboxymethyl cellulose and sodium polyacrylate, or a mixture of sodium carboxymethyl cellulose and polyethylene oxide, or a mixture of sodium polyacrylate and polyethylene oxide, or a mixture of hydroxypropyl methylcellulose, hydroxyethyl methylcellulose and ethyl cellulose, or a mixture of hydroxypropyl methylcellulose, hydroxyethyl methylcellulose and sodium carboxymethyl cellulose, or a mixture of hydroxypropyl methylcellulose, hydroxyethyl methylcellulose and sodium polyacrylate, or a mixture of hydroxypropyl methylcellulose and hydroxyethyl methylcellulose and... A mixture of polyethylene oxide, or a mixture of hydroxypropyl methylcellulose, ethyl cellulose, and sodium carboxymethyl cellulose, or a mixture of hydroxypropyl methylcellulose, ethyl cellulose, and sodium polyacrylate, or a mixture of hydroxypropyl methylcellulose, ethyl cellulose, and polyethylene oxide, or a mixture of hydroxypropyl methylcellulose, ethyl cellulose, and sodium carboxymethyl cellulose and sodium polyacrylate, or a mixture of hydroxypropyl methylcellulose, ethyl cellulose, and sodium carboxymethyl cellulose, or a mixture of hydroxypropyl methylcellulose, ethyl cellulose, and sodium polyacrylate, or hydroxypropyl methylcellulose... A mixture of hydroxyethyl methyl cellulose and ethyl cellulose and polyethylene oxide, or a mixture of hydroxyethyl methyl cellulose, sodium carboxymethyl cellulose and sodium polyacrylate, or a mixture of hydroxyethyl methyl cellulose, sodium carboxymethyl cellulose and polyethylene oxide, or a mixture of ethyl cellulose, sodium carboxymethyl cellulose and polyethylene oxide, or a mixture of ethyl cellulose, sodium carboxymethyl cellulose and polyethylene oxide, or a mixture of hydroxypropyl methyl cellulose, hydroxyethyl methyl cellulose, ethyl cellulose and sodium carboxymethyl cellulose ...Or a mixture of hydroxypropyl methylcellulose, hydroxyethyl methylcellulose, ethyl cellulose, and sodium polyacrylate; or a mixture of hydroxypropyl methylcellulose, hydroxyethyl methylcellulose, ethyl cellulose, and polyethylene oxide; or a mixture of hydroxypropyl methylcellulose, hydroxyethyl methylcellulose, sodium carboxymethyl cellulose, and sodium polyacrylate; or a mixture of hydroxypropyl methylcellulose, hydroxyethyl methylcellulose, sodium carboxymethyl cellulose, and polyethylene oxide; or a mixture of hydroxypropyl methylcellulose, hydroxyethyl methylcellulose, sodium polyacrylate, and polyethylene oxide; or a mixture of hydroxypropyl methylcellulose, ethyl cellulose, sodium carboxymethyl cellulose, and polyethylene oxide; or a mixture of hydroxypropyl methylcellulose, ethyl cellulose, sodium carboxymethyl cellulose, and polyethylene oxide; or a mixture of hydroxyethyl ...hydroxyethyl methylcellulose, sodium carboxymethyl cellulose, and polyethylene oxide; or a mixture of hydroxyethyl methylcellulose, hydroxyethyl methylcellulose, sodium carboxymethyl cellulose, and polyethylene oxide; or a mixture of hydroxyethyl methylcellulose, hydroxyethyl methylcellulose, sodium carboxymethyl cellulose, and polyethylene oxide; or a mixture of hydroxyethyl methylcellulose, hydroxyethyl methylcellulose, sodium carboxymethyl cellulose, and A mixture of hydroxypropyl methylcellulose and ethyl cellulose and sodium polyacrylate and polyethylene oxide, or a mixture of ethyl cellulose and sodium carboxymethyl cellulose and sodium polyacrylate and polyethylene oxide, or a mixture of hydroxypropyl methylcellulose and hydroxyethyl methylcellulose and sodium carboxymethyl cellulose and sodium polyacrylate, or a mixture of hydroxypropyl methylcellulose and hydroxyethyl methylcellulose and sodium carboxymethyl cellulose and polyethylene oxide, or a mixture of hydroxypropyl methylcellulose and hydroxyethyl methylcellulose and sodium carboxymethyl cellulose and sodium polyacrylate and polyethylene oxide, or a mixture of hydroxypropyl methylcellulose and hydroxyethyl methylcellulose and sodium carboxymethyl cellulose and sodium polyacrylate and polyethylene oxide, or a mixture of hydroxyethyl methylcellulose and ethyl cellulose and sodium carboxymethyl cellulose and sodium polyacrylate and polyethylene oxide, or a mixture of hydroxypropyl methylcellulose and hydroxyethyl methylcellulose and sodium carboxymethyl cellulose and sodium polyacrylate and polyethylene oxide.

[0051] In some embodiments, the thermoplastic elastomer material is at least one of nylon (PA), nitrile rubber (NBR), thermoplastic polyurethane elastomer (TPU), polyolefin elastomer (POE), and ethylene-vinyl acetate copolymer (EVA).

[0052] For example, the thermoplastic elastomer material can be nylon, or nitrile rubber, or thermoplastic polyurethane elastomer, or polyolefin elastomer, or ethylene-vinyl acetate copolymer, or a mixture of nylon and nitrile rubber, or a mixture of nylon and thermoplastic polyurethane elastomer, or a mixture of nylon and polyolefin elastomer, or a mixture of nylon and ethylene-vinyl acetate copolymer, or a mixture of nitrile rubber and thermoplastic polyurethane elastomer, or a mixture of nitrile rubber and polyolefin elastomer, or a mixture of nitrile rubber and ethylene-vinyl acetate copolymer, or a mixture of thermoplastic polyurethane elastomer and polyolefin elastomer, or a mixture of thermoplastic polyurethane elastomer and ethylene-vinyl acetate copolymer, or a mixture of nylon and nitrile rubber and thermoplastic polyurethane elastomer, or a mixture of nylon and nitrile rubber and polyolefin elastomer, or a mixture of nylon and nitrile rubber and ethylene-vinyl acetate copolymer, or a mixture of nylon and thermoplastic polyurethane elastomer and polyolefin elastomer. A mixture of hydrocarbon elastomers, or a mixture of nylon and thermoplastic polyurethane elastomers and ethylene-vinyl acetate copolymers, or a mixture of nitrile rubber and thermoplastic polyurethane elastomers and polyolefin elastomers, or a mixture of nitrile rubber and thermoplastic polyurethane elastomers and ethylene-vinyl acetate copolymers, or a mixture of nylon and nitrile rubber and thermoplastic polyurethane elastomers and polyolefin elastomers, or a mixture of nylon and nitrile rubber and thermoplastic polyurethane elastomers and ethylene-vinyl acetate copolymers, or a mixture of nylon and nitrile rubber and thermoplastic polyurethane elastomers and polyolefin elastomers and ethylene-vinyl acetate copolymers, or a mixture of nylon and nitrile rubber and thermoplastic polyurethane elastomers and polyolefin elastomers and ethylene-vinyl acetate copolymers, or a mixture of nitrile rubber and thermoplastic polyurethane elastomers and polyolefin elastomers and ethylene-vinyl acetate copolymers, or a mixture of nylon and nitrile rubber and thermoplastic polyurethane elastomers and polyolefin elastomers and ethylene-vinyl acetate copolymers.

[0053] In some embodiments, the compatibilizer is at least one of polyethylene glycol (PEG) 2000, polyethylene glycol 4000, and polyethylene glycol 6000.

[0054] For example, the compatibilizer may be polyethylene glycol 2000, or polyethylene glycol 4000, or polyethylene glycol 6000, or a mixture of polyethylene glycol 2000 and polyethylene glycol 4000, or a mixture of polyethylene glycol 2000 and polyethylene glycol 6000, or a mixture of polyethylene glycol 4000 and polyethylene glycol 6000, or a mixture of polyethylene glycol 2000, polyethylene glycol 4000 and polyethylene glycol 6000.

[0055] In some embodiments, the inorganic filler is at least one of silica, bentonite, diatomite, and montmorillonite. Silica, bentonite, diatomite, and montmorillonite are all rigid particles.

[0056] For example, the inorganic filler can be silica, bentonite, diatomaceous earth, montmorillonite, a mixture of silica and bentonite, a mixture of silica and diatomaceous earth, a mixture of silica and montmorillonite, a mixture of bentonite and diatomaceous earth, a mixture of bentonite and montmorillonite, a mixture of diatomaceous earth and montmorillonite, a mixture of silica, bentonite and diatomaceous earth, a mixture of silica, diatomaceous earth and montmorillonite, a mixture of silica, diatomaceous earth and montmorillonite, a mixture of bentonite, diatomaceous earth and montmorillonite, or a mixture of silica, bentonite, diatomaceous earth and montmorillonite.

[0057] The oil filter material of this disclosure utilizes polyethylene glycol as a compatibilizer, which improves the compatibility between the thermoplastic elastomer material and the water-absorbing material, ensuring that the water-absorbing material does not easily detach during the oil-water separation process. Furthermore, the high water absorption of polyethylene glycol as a solubilizer accelerates the water absorption rate of the oil filter material and facilitates the formation of strong hydrogen bonds with water molecules, thus improving the water absorption performance. The use of rigid particle inorganic fillers enhances the mechanical strength of the oil filter material, resulting in better pressure resistance of the hydrogel formed after water absorption, thereby improving the water absorption, water-stopping, and oil-blocking properties of the oil filter material. Simultaneously, the hydrogen bonding force between the oil filter material of this disclosure and water molecules is much greater than that with ethanol, and it is insoluble in non-polar solutions such as gasoline, diesel, and ethanol. Therefore, the oil filter material of this disclosure can absorb water molecules in ethanol gasoline and is suitable for filtering water in ethanol gasoline. Using the oil filter material of this disclosure can improve the filtration effect of oil, especially automotive ethanol gasoline, and extend the service life of the oil filter material.

[0058] Furthermore, the fuel dispenser filter made using the oil filtration material of this disclosure embodiment can instantly absorb water in various states, such as free water, water-in-oil, and oil-in-water, effectively preventing water from passing through the fuel dispenser. It also possesses strong water retention capacity, remaining water-free even under high pressure. When the oil filtration material of this disclosure absorbs a certain amount of water, it forms a high-strength hydrogel, simultaneously reducing the pore size until it is completely sealed. This prevents water from passing through the filter element, reduces the refueling flow rate, provides an early warning function for refueling operators, and ultimately achieves the effects of absorbing and stopping water and preventing oil leakage, providing oil quality and safety assurance for gas station operations involving simultaneous refueling and unloading.

[0059] Figure 1This is a flowchart illustrating a method for preparing oil filter materials according to a specific embodiment, such as... Figure 1 As shown, the method for preparing the oil filter material according to the embodiments of this disclosure includes the following steps.

[0060] Step 1: Mix 30% to 60% water-absorbing material, 30% to 60% thermoplastic elastomer material, 5% to 10% compatibilizer and 1% to 5% inorganic filler by weight percentage to obtain a mixture;

[0061] Step 2: Plasticize the mixture to obtain a melt;

[0062] Step 3: Sulfide the melt to obtain a sulfide;

[0063] Step 4: Crush the sulfide to obtain a water-absorbing and swelling material;

[0064] Step 5: Evenly spread the water-absorbing and expanding material on the porous material and perform hot-pressing composite to obtain the oil filter material.

[0065] In some embodiments, step 1, which involves mixing 30% to 60% absorbent material, 30% to 60% thermoplastic elastomer material, 5% to 10% compatibilizer, and 1% to 5% inorganic filler by weight percentage, further includes:

[0066] The water-absorbing material, thermoplastic elastomer material, compatibilizer and inorganic filler are placed in a high-speed mixer and mixed for 5 to 10 minutes.

[0067] In some embodiments, step 2, plasticizing the mixture, includes:

[0068] The mixture is placed in a rubber mixing mill for plasticizing. During the plasticizing process, the speed of the rubber mixing mill is 10 to 20 revolutions per minute, the plasticizing temperature is 100°C to 160°C, and the plasticizing time is 5 to 20 minutes.

[0069] In some embodiments, step 3, vulcanizing the melt, further includes:

[0070] The molten material is placed on a flat vulcanizing machine for vulcanization, wherein the vulcanization temperature is 100°C to 150°C, the vulcanization time is 5 minutes to 10 minutes, and the pressure is 0.3 MPa to 0.8 MPa.

[0071] In some embodiments, step 4, pulverizing the sulfide, includes:

[0072] The sulfide is cooled and pelletized to obtain a water-absorbing and swelling material in coarse particle form;

[0073] The coarse-particle water-absorbing and swelling material is crushed;

[0074] According to the preset conditions, the material is sieved using a sieve with a mesh size of 10 to 200 to obtain a water-absorbing and expanding material that meets the preset particle size requirements.

[0075] In some embodiments, the porous material in step 5 is at least one of nonwoven fabric and filter paper.

[0076] In some embodiments, step 5 involves uniformly spreading the water-absorbing and swelling material onto the porous material and then hot-pressing it to obtain an oil filter material, comprising:

[0077] The water-absorbing and expanding material is evenly laid on the porous material using a spreader, wherein the net mass of the water-absorbing and expanding material on the porous material is 400 g / m² to 1200 g / m².

[0078] Hot-pressing composite of water-absorbing and expanding materials and porous materials is performed, wherein the hot-pressing temperature is 100℃ to 200℃, the hot-pressing pressure is 0.05 MPa to 0.3 MPa, and the hot-pressing time is 1 minute to 5 minutes.

[0079] The method for preparing oil filter materials according to this disclosure is simple and low-cost. It involves the physical blending of various materials using a rubber mixing mill and a flat vulcanizing machine, forming an interpenetrating cross-linked network between the thermoplastic elastomer and the absorbent material in the oil filter material. This results in a more stable molecular structure for the oil filter material. The added polyethylene glycol acts as a compatibilizer. Because polyethylene glycol segments contain both hydrophobic methylene (-CH2-) groups and hydrophilic hydroxyl (-OH) groups, it promotes the compatibility between the thermoplastic elastomer and the superabsorbent material. Utilizing polyethylene glycol as a compatibilizer enhances the compatibility between the thermoplastic elastomer and the absorbent material, ensuring... The water-absorbing material in the oil-water separation process is not easily detached, thus solving the problem of easy detachment of water-absorbing material during oil-water separation. Furthermore, the polyethylene glycol added in the preparation method of the oil filter material in this embodiment contains a large number of -CH2-CH2-O- segments on its molecular backbone. These segments have a strong water-absorbing effect on water molecules, accelerating the water absorption speed of the oil filter material and making it easier to form strong hydrogen bonds with water molecules, thereby improving the water absorption performance of the oil filter material. The use of rigid particle inorganic fillers enhances the mechanical strength of the oil filter material, resulting in better pressure resistance of the hydrogel formed after water absorption, thus enhancing the water absorption, water-stopping, and oil-blocking properties of the oil filter material. The oil filter material in this embodiment contains a large number of hydroxyl groups; therefore, the hydrogen bonding force between the oil filter material and water molecules is much greater than that with ethanol. Simultaneously, it is insoluble in non-polar solutions such as gasoline, diesel, and ethanol. Therefore, this oil filter material can absorb water molecules in ethanol gasoline and is suitable for filtering water in ethanol gasoline. The oil filter material of the present disclosure can improve the filtration effect of oil, especially automotive ethanol gasoline, and extend the service life of the oil filter material.

[0080] The oil filter material prepared by the method of this disclosure is applied to the fuel dispenser filter. It can instantly absorb water in various states, including free water, water-in-oil, and oil-in-water, effectively preventing water from passing through the fuel dispenser. It also has a strong water retention capacity, remaining water-free even under high pressure. When the oil filter material absorbs a certain amount of water, it forms a high-strength hydrogel, simultaneously reducing the pore size until it is completely sealed. This prevents water from passing through the filter element, reduces the refueling flow rate, provides an early warning function for the fuel dispenser operator, and ultimately achieves the effects of absorbing and stopping water and preventing oil leakage. This provides oil quality and safety assurance for fuel dispensing and refueling operations at gas stations.

[0081] The following, in conjunction with specific embodiments and comparative examples, further illustrates the process and effects of the preparation method of the oil filter material disclosed herein.

[0082] Example 1

[0083] Step (11): Place 4 kg of nitrile rubber, 4.5 kg of polyethylene oxide, 1.0 kg of polyethylene glycol 4000 and 0.5 kg of silica into a high-speed mixer and mix for 10 minutes to obtain a mixture.

[0084] Of these, 4 kg of nitrile rubber is a thermoplastic elastomer material, 4.5 kg of polyethylene oxide is a water-absorbing material, 1.0 kg of polyethylene glycol 4000 is a compatibilizer, and 0.5 kg of silica is an inorganic filler.

[0085] In some embodiments, polyethylene glycol 4000 may also be replaced by polyethylene glycol 2000, or polyethylene glycol 6000, or a mixture of polyethylene glycol 2000 and polyethylene glycol 4000, or a mixture of polyethylene glycol 2000 and polyethylene glycol 6000, or a mixture of polyethylene glycol 4000 and polyethylene glycol 6000, or a mixture of polyethylene glycol 2000 and polyethylene glycol 4000 and polyethylene glycol 6000.

[0086] In some embodiments, silica may also be replaced with bentonite, diatomaceous earth, montmorillonite, a mixture of silica and bentonite, a mixture of silica and diatomaceous earth, a mixture of silica and montmorillonite, a mixture of bentonite and diatomaceous earth, a mixture of bentonite and montmorillonite, a mixture of diatomaceous earth and montmorillonite, a mixture of silica and bentonite and diatomaceous earth, a mixture of silica and bentonite and montmorillonite, a mixture of silica and diatomaceous earth and montmorillonite, a mixture of bentonite and diatomaceous earth and montmorillonite, or a mixture of silica and bentonite and diatomaceous earth and montmorillonite.

[0087] Step (12): Add the mixture obtained in step (11) into a rubber mixing mill and plasticize it at 150°C for 10 minutes to obtain a melt.

[0088] The speed of the rubber mixing mill is controlled between 10 rpm and 20 rpm, preferably between 15 rpm.

[0089] Step (13): Place the melt obtained in step (12) into a flat vulcanizing bed for vulcanization. The vulcanization temperature is 150℃, the pressure is 0.6 MPa, and the vulcanization time is 10 minutes to obtain the shaped vulcanized material.

[0090] Step (14): Cool the sulfide obtained in step (13) and granulate it to obtain a water-absorbing and expanding material in coarse particle form.

[0091] Step (15): The coarse-grained water-absorbing and swelling material obtained in step (14) is crushed and sieved using a 60-mesh sieve to obtain water-absorbing and swelling material particles with different particle sizes larger than 60 mesh.

[0092] Step (16): The water-absorbing and swelling material particles obtained in step (15) are evenly spread on a non-woven fabric using a fabric spreader, ensuring that the net weight of the water-absorbing and swelling material on the non-woven fabric reaches 450 g / m². Then, hot-press lamination is performed, followed by cooling to room temperature and cutting into different sizes to produce the finished water-absorbing and swelling material for oil filtration. The hot-press lamination temperature is 165℃, the hot-press lamination pressure is 0.2 MPa, and the hot-press lamination time is 2 minutes.

[0093] In some embodiments, nonwoven fabric may be replaced with filter paper.

[0094] Example 2

[0095] Step (21): Place 2.3 kg of thermoplastic polyurethane elastomer, 1.0 kg of nylon, 6 kg of ethyl cellulose, 0.5 kg of polyethylene glycol 4000 and 0.2 kg of bentonite into a high-speed mixer and mix for 10 minutes to obtain a mixture.

[0096] The 3.3 kg thermoplastic elastomer material consists of 2.3 kg thermoplastic polyurethane elastomer and 1.0 kg nylon, 6 kg ethyl cellulose is used as a water-absorbing material, 0.5 kg polyethylene glycol 4000 is used as a compatibilizer, and 0.2 kg bentonite is used as an inorganic filler.

[0097] In some embodiments, polyethylene glycol 4000 may also be replaced by polyethylene glycol 2000, or polyethylene glycol 6000, or a mixture of polyethylene glycol 2000 and polyethylene glycol 4000, or a mixture of polyethylene glycol 2000 and polyethylene glycol 6000, or a mixture of polyethylene glycol 4000 and polyethylene glycol 6000, or a mixture of polyethylene glycol 2000 and polyethylene glycol 4000 and polyethylene glycol 6000.

[0098] In some embodiments, bentonite may also be replaced with silica, diatomaceous earth, montmorillonite, a mixture of silica and bentonite, a mixture of silica and diatomaceous earth, a mixture of silica and montmorillonite, a mixture of bentonite and diatomaceous earth, a mixture of bentonite and montmorillonite, a mixture of diatomaceous earth and montmorillonite, a mixture of silica, bentonite and diatomaceous earth, a mixture of silica, bentonite and montmorillonite, a mixture of silica, diatomaceous earth and montmorillonite, a mixture of bentonite, diatomaceous earth and montmorillonite, or a mixture of silica, bentonite, diatomaceous earth and montmorillonite.

[0099] Step (22): Add the mixture obtained in step (21) into a rubber mixing mill and plasticize it at 135°C for 10 minutes to obtain a melt.

[0100] The speed of the rubber mixing mill is controlled between 10 rpm and 20 rpm, preferably between 15 rpm.

[0101] Step (23): Place the melt obtained in step (22) into a flat vulcanizing bed for vulcanization. The vulcanization temperature is 140℃, the pressure is 0.4 MPa, and the vulcanization time is 10 minutes to obtain the shaped vulcanized material.

[0102] Step (24): Cool the sulfide obtained in step (23) and granulate it to obtain a water-absorbing and expanding material in coarse particle form.

[0103] Step (25): The coarse-grained water-absorbing and swelling material obtained in step (24) is crushed and sieved using 10-mesh and 80-mesh screens to obtain water-absorbing and swelling material particles with a particle size of 10-mesh to 80-mesh.

[0104] Step (26): The water-absorbing and swelling material particles obtained in step (25) are evenly spread onto a non-woven fabric using a fabric spreader, ensuring that the net weight of the water-absorbing and swelling material on the non-woven fabric reaches 700 g / m². Then, hot-press lamination is performed, followed by cooling to room temperature and cutting into different sizes to produce the finished water-absorbing and swelling material for oil filtration. The hot-press lamination temperature is 150℃, the hot-press lamination pressure is 0.3 MPa, and the hot-press lamination time is 4 minutes.

[0105] In some embodiments, nonwoven fabric may be replaced with filter paper.

[0106] Example 3

[0107] Step (31): Place 3.5 kg of polyolefin elastomer, 2.0 kg of ethylene-vinyl acetate copolymer, 3.0 kg of hydroxypropyl methylcellulose, 1.0 kg of polyethylene glycol 6000 and 0.5 kg of bentonite into a high-speed mixer and mix for 10 minutes to obtain a mixture.

[0108] The 5.5kg thermoplastic elastomer material consists of 3.5kg polyolefin elastomer and 2.0kg ethylene-vinyl acetate copolymer, 3.0kg hydroxypropyl methylcellulose is used as a water-absorbing material, 1.0kg polyethylene glycol 6000 is used as a compatibilizer, and 0.5kg bentonite is used as an inorganic filler.

[0109] In some embodiments, polyethylene glycol 6000 may also be replaced by polyethylene glycol 2000, or polyethylene glycol 4000, or a mixture of polyethylene glycol 2000 and polyethylene glycol 4000, or a mixture of polyethylene glycol 2000 and polyethylene glycol 6000, or a mixture of polyethylene glycol 4000 and polyethylene glycol 6000, or a mixture of polyethylene glycol 2000, polyethylene glycol 4000 and polyethylene glycol 6000.

[0110] In some embodiments, bentonite may also be replaced with silica, diatomaceous earth, montmorillonite, a mixture of silica and bentonite, a mixture of silica and diatomaceous earth, a mixture of silica and montmorillonite, a mixture of bentonite and diatomaceous earth, a mixture of bentonite and montmorillonite, a mixture of diatomaceous earth and montmorillonite, a mixture of silica, bentonite and diatomaceous earth, a mixture of silica, bentonite and montmorillonite, a mixture of silica, diatomaceous earth and montmorillonite, a mixture of bentonite, diatomaceous earth and montmorillonite, or a mixture of silica, bentonite, diatomaceous earth and montmorillonite.

[0111] Step (32): Add the mixture obtained in step (31) into a rubber mixing mill and plasticize it at 150°C for 8 minutes to obtain a melt.

[0112] The speed of the rubber mixing mill is controlled between 10 rpm and 20 rpm, preferably between 15 rpm.

[0113] Step (33): Place the melt obtained in step (32) into a flat vulcanizing bed for vulcanization. The vulcanization temperature is 135℃, the pressure is 0.5 MPa, and the vulcanization time is 10 minutes to obtain the shaped vulcanized material.

[0114] Step (34): Cool the sulfide obtained in step (33) and granulate it to obtain a water-absorbing and expanding material in coarse particle form.

[0115] Step (35): The coarse-grained water-absorbing and swelling material obtained in step (34) is crushed and sieved using 20-mesh and 100-mesh sieves to obtain water-absorbing and swelling material particles with a particle size of 20-mesh to 100-mesh.

[0116] Step (36): The water-absorbing and swelling material particles obtained in step (35) are evenly spread on a non-woven fabric using a fabric spreader, ensuring that the net weight of the water-absorbing and swelling material on the non-woven fabric reaches 900 g / m². Then, hot-press lamination is performed, followed by cooling to room temperature and cutting into different sizes to produce the finished water-absorbing and swelling material for oil filtration. The hot-press lamination temperature is 150℃, the hot-press lamination pressure is 0.25 MPa, and the hot-press lamination time is 5 minutes.

[0117] In some embodiments, nonwoven fabric may be replaced with filter paper.

[0118] Example 4

[0119] Step (41): Place 2.55 kg of thermoplastic polyurethane elastomer, 3.825 kg of hydroxyethyl methyl cellulose, 0.625 kg of nitrile rubber, 1.7 kg of sodium carboxymethyl cellulose, 1.0 kg of polyethylene glycol 6000, and 0.3 kg of bentonite into a high-speed mixer and mix for 10 minutes to obtain a mixture.

[0120] The 3.175 kg thermoplastic elastomer material consists of 2.55 kg thermoplastic polyurethane elastomer and 0.625 kg nitrile rubber; the 5.525 kg water-absorbing material consists of 3.825 kg hydroxyethyl methyl cellulose and 1.7 kg sodium carboxymethyl cellulose; the 1.0 kg polyethylene glycol 6000 compatibilizer; and the 0.3 kg bentonite inorganic filler.

[0121] In some embodiments, polyethylene glycol 6000 may also be replaced by polyethylene glycol 2000, or polyethylene glycol 4000, or a mixture of polyethylene glycol 2000 and polyethylene glycol 4000, or a mixture of polyethylene glycol 2000 and polyethylene glycol 6000, or a mixture of polyethylene glycol 4000 and polyethylene glycol 6000, or a mixture of polyethylene glycol 2000, polyethylene glycol 4000 and polyethylene glycol 6000.

[0122] In some embodiments, bentonite may also be replaced with silica, diatomaceous earth, montmorillonite, a mixture of silica and bentonite, a mixture of silica and diatomaceous earth, a mixture of silica and montmorillonite, a mixture of bentonite and diatomaceous earth, a mixture of bentonite and montmorillonite, a mixture of diatomaceous earth and montmorillonite, a mixture of silica, bentonite and diatomaceous earth, a mixture of silica, bentonite and montmorillonite, a mixture of silica, diatomaceous earth and montmorillonite, a mixture of bentonite, diatomaceous earth and montmorillonite, or a mixture of silica, bentonite, diatomaceous earth and montmorillonite.

[0123] Step (42): Add the mixture obtained in step (41) into a rubber mixing mill and plasticize it at 150°C for 8 minutes to obtain a melt.

[0124] The speed of the rubber mixing mill is controlled between 10 rpm and 20 rpm, preferably between 15 rpm.

[0125] Step (43): Place the melt obtained in step (42) into a flat vulcanizing bed for vulcanization. The vulcanization temperature is 150℃, the pressure is 0.5 MPa, and the vulcanization time is 10 minutes to obtain the shaped vulcanized material.

[0126] Step (44): Cool the sulfide obtained in step (43) and granulate it to obtain a water-absorbing and expanding material in coarse particle form.

[0127] Step (45): The coarse-grained water-absorbing and swelling material obtained in step (44) is crushed and sieved using 40-mesh and 60-mesh screens to obtain water-absorbing and swelling material particles with a particle size of 40-mesh to 60-mesh.

[0128] Step (46): The water-absorbing and swelling material particles obtained in step (45) are evenly spread on a non-woven fabric using a fabric spreader, ensuring that the net weight of the water-absorbing and swelling material on the non-woven fabric reaches 950 g / m². Then, hot-press lamination is performed, followed by cooling to room temperature and cutting into different sizes to produce the finished water-absorbing and swelling material for oil filtration. The hot-press lamination temperature is 150℃, the hot-press lamination pressure is 0.25, and the hot-press lamination time is 4 minutes.

[0129] In some embodiments, nonwoven fabric may be replaced with filter paper.

[0130] Comparative Example 1

[0131] Step (51): Mix 5.0 kg of nylon and 5.0 kg of sodium polyacrylate in a stirrer until homogeneous, and react at a temperature of 100°C to 120°C. After the reaction is complete, cool to room temperature.

[0132] Step (52): After cooling, the particles are sieved using a 100-mesh sieve to obtain absorbent particles.

[0133] Step (53): Mix the 9 kg of absorbent particles obtained after sieving with 1 kg of adhesive (nylon is selected as the adhesive) evenly.

[0134] Step (54): Spread the mixed material evenly on the non-woven fabric, then heat it. The heating temperature is controlled between 100°C and 150°C and the heating time is 20 minutes. After the adhesive has completely melted, cool it to room temperature and cut it into different sizes to obtain the finished water-absorbing filter material.

[0135] Comparative Example 2

[0136] Step (61): Spread 5.0 kg of sodium polyacrylate evenly on the filter paper and wet it by spraying water-absorbing particles with water mist.

[0137] Step (62): Place another filter paper on the moist material obtained in step (61), and then put the two layers of filter paper into a folding machine to fold the paper into a pleated shape. The temperature of the folding machine is 150℃, the pressure is 0.3mpa, and the speed is 0.2m / min.

[0138] Step (63): Prepare the pleated filter paper into a finished filter element.

[0139] Static water absorption ratio tests were conducted on the finished products prepared using the methods described in the above embodiments and comparative examples. The static water absorption ratios are detailed in Table 1. The method for testing the static water absorption ratio is as follows: Take a sample, weigh it to its initial mass M1 using a balance, hold one end of the sample with tweezers, ensuring the tweezers are perpendicular to the sample's longitudinal direction, without gripping the internal absorbent layer; immerse the sample along with the tweezers into distilled water at room temperature for 60 seconds, then lift the tweezers to completely remove the sample from the water surface, suspend it vertically for 90 seconds, and weigh the sample after water absorption (post-absorption mass M2). Calculate the water absorption ratio using the following formula:

[0140] Static water absorption ratio = (mass after absorption M2 - mass before absorption M1) / mass before absorption M1

[0141] Table 1 Static water absorption ratio

[0142] project Static water absorption ratio Example 1 2.5 Example 2 3.0 Example 3 3.2 Example 4 3.5 Comparative Example 1 2.0 Comparative Example 2 2.3

[0143] As can be seen from Table 1, the static water absorption ratio of the oil filter material of this embodiment is higher than that of the comparative example, which proves that the water absorption performance of the oil filter material of this embodiment is better than that of the filter material of the comparative example.

[0144] The dissolution performance of the finished products prepared using the methods of the above embodiments and comparative examples was tested, and the dissolution performance is detailed in Table 2. The method for testing the dissolution performance was as follows: a sample was taken and immersed in an oil containing 5% water. After 20 days of immersion, the sample was removed, the oil was evaporated, and the weight of the residual impurities was weighed after evaporation.

[0145] Table 2 Dissolution performance

[0146] project Water-containing gasoline Water-containing diesel Hydroethanol gasoline Water-containing methanol gasoline Example 1 Non-dissolving Non-dissolving Non-dissolving Non-dissolving Example 2 Non-dissolving Non-dissolving Non-dissolving Non-dissolving Example 3 Non-dissolving Non-dissolving Non-dissolving Non-dissolving Example 4 Non-dissolving Non-dissolving Non-dissolving Non-dissolving Comparative Example 1 Dissolution Dissolution Dissolution Dissolution Comparative Example 2 Dissolution Dissolution Dissolution Dissolution

[0147] As can be seen from Table 2, the oil filter material of this embodiment does not dissolve in water-containing gasoline, water-containing diesel, water-containing ethanol gasoline, or water-containing methanol gasoline, while the comparative sample does dissolve. This proves that the oil filter material of this embodiment does not dissolve in various oils, has high safety in use, and does not affect the quality of the oil.

[0148] Dynamic water absorption and sealing performance tests were conducted on the finished products prepared using the methods described in the above embodiments and comparative examples. The dynamic water absorption and sealing performance results are detailed in Table 3. The method for testing dynamic water absorption and sealing performance was as follows: A sample was taken, placed in and fixed to a filter device, and water was injected into the filter device so that the water passed through the sample under pressure. The water pressure was controlled at 0.4 MPa. The filtered water was collected and weighed. If water permeates the sample, it indicates poor water absorption and sealing performance; if water does not permeate the sample at all, it indicates good water absorption and sealing performance.

[0149] Table 3 Dynamic water absorption and water-stopping performance

[0150] project Water-absorbing and water-stopping properties Example 1 Good, no water filtered out. Example 2 Good, no water filtered out. Example 3 Good, no water filtered out. Example 4 Good, no water filtered out. Comparative Example 1 Poor performance, a small amount of water is filtered out. Comparative Example 2 Poor performance, with a large amount of water filtered out.

[0151] As can be seen from Table 3, the oil filter material of the present disclosure embodiment can effectively absorb and stop water, preventing water from being filtered out. The comparative examples all show varying degrees of water filtration, proving that the oil filter material of the present disclosure embodiment has excellent dynamic water absorption and water-stopping performance.

[0152] Dynamic water absorption and oil blocking performance tests were conducted on the finished products prepared using the methods described in the above embodiments and comparative examples. The dynamic water absorption and oil blocking performance results are detailed in Table 4. The method for testing the dynamic water absorption and oil blocking performance was as follows: A sample was taken, placed in and fixed in a filter device, and water-containing gasoline (10% water content) was injected into the filter device. The water-containing gasoline was then pressurized to pass through the sample for filtration. The injected water-containing gasoline was pressurized to 0.4 MPa, and a stopwatch was used to record the pressure. The oil sample after filtration was collected, the filtration rate was calculated, and the state of the filtered oil was observed. If the oil was cloudy, it indicated that the sample had poor water absorption and oil blocking performance; if the oil was clear and the filtration rate was less than 0.5 L / min, it indicated that the sample had good water absorption and oil blocking performance.

[0153] Table 4 Dynamic water absorption and oil resistance performance

[0154]

[0155] Table 4 shows that the oil filtration material of this embodiment can produce clear filtered oil for water-containing gasoline, water-containing diesel, water-containing ethanol gasoline, and water-containing methanol gasoline, while the filtered oil obtained in the comparative example is turbid. Furthermore, the oil filtration speed of the oil filtration material of this embodiment is lower than that of the comparative example, demonstrating that the oil filtration material of this embodiment has excellent water absorption and oil blocking properties for various water-containing oils. This water absorption and oil blocking performance can provide gas stations with an early warning function for water content in fuel. For example, when the oil filtration material of this embodiment is applied to a fuel dispenser filter, the change in the filtration rate of the fuel dispenser filter can be used to determine whether the water content in the fuel stored at the gas station exceeds the normal level.

[0156] The test results above show that, compared with existing filter materials, the oil filter material of this disclosure has significant improvements in static water absorption ratio, dissolution performance, dynamic water absorption and water-stopping performance, and dynamic water absorption and oil-blocking performance. This proves that the oil filter material of this disclosure can improve the filtration effect of various automotive oils, especially automotive ethanol gasoline.

[0157] Figure 2 This is a schematic diagram of the apparatus structure for performing dynamic water absorption and water-stopping performance tests and dynamic water absorption and oil-blocking performance tests, according to an illustrative embodiment. Figure 2 As shown, the device mainly includes a filter 201, a test liquid container 202, and an air compressor 203. The filter 201 and the test liquid container 202 are connected by a liquid pipe 204. The liquid pipe 204 is equipped with a first valve 205 and a pressure gauge 206. The test liquid container 202 has an injection port, through which the test liquid (such as water or water-containing gasoline) is injected into the test liquid container 202. Figure 2 In the illustrated embodiment, the test liquid is injected into the test liquid container 202 through a funnel 207 installed at the injection port and a second valve 208. An air compressor 203 is connected to the test liquid container 202 through a gas pipe 209 and pressurizes the test liquid container 202. A third valve 210 is provided on the gas pipe 209. To facilitate observation of the test liquid, the test liquid container 202 can be made of pressure-resistant glass.

[0158] Figure 2 The method of using the apparatus shown in the test process includes: first, ensuring that the first valve 205 is closed, fixing the sample to the filter device 201 and injecting the test liquid into the test liquid container 202, ensuring that the filter device 201 is sealed and that the test liquid in the filter device 201 can only flow from one side of the sample to the other side; after the test liquid is injected into the test liquid container 202, closing the second valve 208 to ensure that the pressure in the test liquid container 202 will not leak out of the injection port when pressurized; opening the third valve 21. 0. Turn on the air compressor 203 so that the test liquid in the test liquid container 202 can enter the filter device 201 with the first valve 205 open; open the first valve 205 so that the test liquid enters the filter device 201 and immerses the sample; monitor the pressure value by the pressure gauge 206 and control the opening degree of the third valve 210, the first valve 205 and the pressure of the air compressor 203 to ensure that the pressure of the test liquid entering the filter device 201 is within the preset parameter range (for example, control the pressure of the test liquid to 0.4 MPa).

[0159] In an existing method for preparing a water-absorbing filter material for oil processing, a highly absorbent substrate and a molding agent are used. The substrate and molding agent are mixed uniformly in a certain proportion, reacted under specific temperature conditions, and then cooled and sieved to prepare absorbent particles. However, this method suffers from poor compatibility between the substrate and the molding agent. After immersion in water for a period of time, the substrate dissolves from the porous non-woven fabric. Furthermore, once saturated with water and under the high pressure of a fuel dispenser, colloid loss occurs, posing a risk to oil quality. In contrast, the present invention addresses this problem by preventing the absorbent material from easily detaching during oil-water separation. The oil filter material also exhibits high mechanical strength, resulting in better pressure resistance of the hydrogel formed after water absorption, preventing colloid loss and improving its water absorption, water-stopping, and oil-blocking properties.

[0160] In a current method for preparing a superabsorbent resin composition and a molded or foamed article containing a water-absorbing and swelling substance, the superabsorbent material and a thermoplastic elastomer material are physically mixed and molded at high temperature. The prepared molding material is then mixed with a portion of a binder and thermally bonded to a porous material such as nonwoven fabric to produce a nonwoven fabric molded article, which is used in the fields of daily necessities or filtration, as shown in Comparative Example 1. The test results in Tables 1 to 4 show that this molded article has a low static water absorption ratio, poor dissolution performance against various oils, poor dynamic water absorption and water-stopping performance, and poor dynamic water absorption and oil-blocking performance; all test results are far inferior to those of the embodiments disclosed herein.

[0161] The above description is merely a preferred embodiment of this disclosure and is not intended to limit this disclosure. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the scope of protection of this disclosure.

Claims

1. An oil filtration material, characterized in that, Raw materials are measured by weight percentage and include: Absorbent material 30% to 60%; Thermoplastic elastomer materials: 30% to 60%; The compatibilizer comprises 5% to 10%, wherein the compatibilizer is at least one of polyethylene glycol 2000, polyethylene glycol 4000 and polyethylene glycol 6000, and the main chain of the compatibilizer contains -CH2-CH2-O- links, which are used to promote the compatibility between the thermoplastic elastomer material and the water-absorbing material and accelerate the water absorption rate of the oil filter material; The inorganic filler comprises 1% to 5%, wherein the inorganic filler is at least one of silica, bentonite, diatomite and montmorillonite, wherein silica, bentonite and diatomite are all rigid particles, used to enhance the pressure resistance of the hydrogel formed after the oil filter material absorbs water. The thermoplastic elastomer material and the absorbent material form an interpenetrating cross-linked network.

2. The oil filtration material as described in claim 1, characterized in that: The absorbent material is at least one of hydroxypropyl methylcellulose, hydroxyethyl methylcellulose, ethyl cellulose, sodium carboxymethyl cellulose, sodium polyacrylate, and polyethylene oxide; The thermoplastic elastomer material is at least one of nylon, nitrile rubber, thermoplastic polyurethane elastomer, polyolefin elastomer, and ethylene-vinyl acetate copolymer.

3. The method for preparing the oil filter material as described in claim 1 or 2, characterized in that, include: A mixture is obtained by mixing the water-absorbing material, the thermoplastic elastomer material, the compatibilizer and the inorganic filler in a certain proportion; The mixture is then plasticized to obtain a melt; The melt is sulfided to obtain a sulfide; The sulfide was crushed to obtain a water-absorbing and swelling material; The water-absorbing and swelling material is evenly spread on a porous material and then hot-pressed to obtain the oil filter material.

4. The preparation method according to claim 3, characterized in that, The process of mixing a certain proportion of the absorbent material, the thermoplastic elastomer material, the compatibilizer, and the inorganic filler includes: The absorbent material, the thermoplastic elastomer material, the compatibilizer, and the inorganic filler are placed in a high-speed mixer and stirred for 5 to 10 minutes.

5. The preparation method according to claim 3, characterized in that, The plasticizing of the mixture includes: The mixture is placed in a rubber mixing mill for plasticizing, wherein during the plasticizing process, the rotation speed of the rubber mixing mill is 10 to 20 revolutions per minute, the plasticizing temperature is 100°C to 160°C, and the plasticizing time is 5 to 20 minutes.

6. The preparation method according to claim 3, characterized in that, The process of vulcanizing the melt includes: The molten material is placed on a flat vulcanizing machine for vulcanization, wherein the vulcanization temperature is 100°C to 150°C, the vulcanization time is 5 minutes to 10 minutes, and the pressure is 0.3 MPa to 0.8 MPa.

7. The preparation method according to claim 3, characterized in that, The step of pulverizing the sulfide includes: The sulfide is cooled and pelletized to obtain the water-absorbing and swelling material in coarse particle form; The coarse-particle-shaped water-absorbing and swelling material is crushed; According to preset conditions, the material is sieved using a sieve with a mesh size of 10 to 200 to obtain the water-absorbing and expanding material that meets the preset particle size requirements.

8. The preparation method according to claim 3, characterized in that, The porous material is at least one of nonwoven fabric and filter paper.

9. The preparation method according to claim 3, characterized in that, The process of uniformly spreading the water-absorbing and swelling material onto a porous material and then hot-pressing it to obtain the oil filter material comprises: The water-absorbing and swelling material is evenly laid on the porous material using a fabric spreader, wherein the net mass of the water-absorbing and swelling material on the porous material is 400 g / m² to 1200 g / m². The water-absorbing and swelling material and the porous material are hot-pressed together to obtain the oil filter material. The hot-pressing temperature is 100°C to 200°C, the hot-pressing pressure is 0.05 MPa to 0.3 MPa, and the hot-pressing time is 1 minute to 5 minutes.

10. The application of an oil filter material prepared by the method described in claim 3 in a fuel dispenser filter.

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