Oil-water separation material and preparation method thereof

Abstract

The invention relates to an oil-water separation material and a preparation method thereof, and the preparation method comprises the following steps: S1, pretreating waste silk of ultra-high molecular weight polyethylene fiber to prepare a non-woven fabric; s2, performing plasma treatment and surface treatment on the non-woven fabric to obtain the treated non-woven fabric; s3, the treated non-woven fabric is subjected to functionalization treatment, and the oil-water separation material is obtained; wherein the functionalization treatment comprises the steps that the treated non-woven fabric is sequentially put into an organic solution and a metal salt solution to be soaked, a separable material grows on the treated non-woven fabric, and the oil-water separation material is obtained. According to the invention, the recycling of the ultra-high molecular weight polyethylene fiber waste silk as a waste product is realized, and the preparation cost is reduced. The non-woven fabric is soaked in the organic solution and the metal salt solution in sequence, the separable material grows on the treated non-woven fabric, the obtained oil-water separation material has a very high oil-water separation effect through experiments, and the separation efficiency reaches 95.26% or above.

Description

Technical Field

[0001] The invention relates to the technical field of ultra-high molecular weight polyethylene fiber preparation, in particular to an oil-water separation material and a preparation method thereof. Background Art

[0002] Ultra-high molecular weight polyethylene fiber is referred to as UHMWPE fiber, and its alias is also called high-strength high-modulus polyethylene fiber. It is collectively known as the "three major high-tech fibers in the world" along with carbon fiber and aramid. Ultra-high molecular weight polyethylene fiber is the strongest and most resilient fiber in the world. It is currently the fiber with the highest specific strength and bulletproof performance among industrialized fiber materials. It has many excellent properties such as ultra-high strength, ultra-high modulus, low density, wear resistance, low temperature resistance, UV resistance, shielding resistance, good flexibility, high impact energy absorption, and resistance to strong acids, strong alkalis, and chemical corrosion.

[0003] The related art provides a method for preparing ultra-high molecular weight polyethylene fiber, which specifically includes the following steps: (1) preparing a spinning solution; (2) spinning; (3) extraction; (4) drying; (5) stretching; a water washing step is added between step (3) and step (4), in which the filaments after exiting the extraction tank are sent to a water washing tank for water washing to remove the second solvent and the residual first solvent carried on the surface, and the washed filaments are sent to step (4) for drying.

[0004] However, the oil-water separation material prepared by the method provided by the related art has low oil-water separation efficiency and cannot be used for separation of more types of oils and water. Summary of the invention

[0005] The main purpose of the present invention is to overcome the defects of existing oil-water separation materials and provide a new oil-water separation material and a preparation method thereof. The technical problem to be solved is to make it have better oil-water separation efficiency and be applicable to the separation of more types of oil and water, so that it is more suitable for practical use and has industrial utilization value.

[0006] The purpose of the present invention and the technical problem to be solved are achieved by adopting the following technical solutions.

[0007] Compared with the prior art, the present invention has obvious advantages and beneficial effects. From the above technical scheme, it can be seen that in order to achieve the above-mentioned invention purpose, the main technical contents of the present invention are as follows:

[0008] In one aspect, the present invention provides an oil-water separation material and a preparation method thereof, the method comprising:

[0009] S1, pretreating waste ultra-high molecular weight polyethylene fibers to prepare non-woven fabrics;

[0010] S2, performing plasma treatment and surface treatment on the non-woven fabric to obtain a treated non-woven fabric;

[0011] S3, performing functional treatment on the treated non-woven fabric to obtain the oil-water separation material;

[0012] The functionalization treatment comprises soaking the treated non-woven fabric in an organic solution and a metal salt solution in turn, growing a separation material on the treated non-woven fabric to obtain the oil-water separation material.

[0013] According to an optional embodiment of the present invention, the nonwoven fabric is sequentially subjected to plasma treatment and surface treatment under active gas or inert gas.

[0014] According to an optional embodiment of the present invention, the active gas includes air, O2, NH3 or CO2, and the inert gas includes N2, He, Ar or CF4.

[0015] According to an optional embodiment of the present invention, the organic solution includes 2-methylimidazole and methanol.

[0016] According to an optional embodiment of the present invention, the mass ratio of 2-methylimidazole to methanol is 0.2 to 1:10.

[0017] According to an optional embodiment of the present invention, the metal salt solution is a mixture of Zn(NO3)2 and deionized water.

[0018] According to an optional embodiment of the present invention, the mass ratio of Zn(NO3)2 to deionized water is 0.5-30:100.

[0019] According to an optional embodiment of the present invention, the treated non-woven fabric is immersed in the organic solution for 1-2 hours, and then immersed in the metal salt solution for 3 hours to 18 hours.

[0020] According to an optional embodiment of the present invention, the method further includes growing a separation material on the treated non-woven fabric, soaking the non-woven fabric in deionized water for 12 hours to 14 hours, and drying the non-woven fabric to obtain the oil-water separation material.

[0021] On the other hand, an oil-water separation material is provided, wherein the oil-water separation material is prepared by any of the above-mentioned methods for preparing an oil-water separation material.

[0022] From the above, it can be seen that the present invention pre-treats waste ultra-high molecular weight polyethylene fibers to prepare non-woven fabrics; performs plasma treatment and surface treatment on the non-woven fabric to obtain treated non-woven fabrics; performs functionalization treatment on the treated non-woven fabric to obtain the oil-water separation material; wherein the functionalization treatment includes successively immersing the treated non-woven fabric in an organic solution and a metal salt solution, growing a separation material on the treated non-woven fabric to obtain the oil-water separation material.

[0023] By means of the above technical solution, the oil-water separation material and the preparation method thereof of the present invention have at least the following advantages:

[0024] The oil-water separation material prepared by the preparation method of the oil-water separation material provided in the embodiment of the present invention is based on the use of waste ultra-high molecular weight polyethylene fiber as the basic material, which realizes the reuse of waste ultra-high molecular weight polyethylene fiber as waste, thereby reducing the preparation cost. In addition, the embodiment of the present invention soaks the non-woven fabric in an organic solution and a metal salt solution successively, and grows a separation material on the treated non-woven fabric. The obtained oil-water separation material has a high oil-water separation effect after experiments, and the separation efficiency reaches more than 95.26%.

[0025] In summary, the special oil-water separation material and preparation method thereof of the present invention overcome the defects of existing oil-water separation materials and provide a new oil-water separation material and preparation method thereof. The technical problem to be solved is to make it have better oil-water separation efficiency and be applicable to the separation of more types of oil and water, thereby being more suitable for practical use and having industrial utilization value.

[0026] It has the above-mentioned advantages and practical value, and no similar design has been publicly published or used in similar oil-water separation materials and preparation methods, so it is indeed innovative. It has great improvements in both oil-water separation materials and preparation methods and functions, and has great progress in technology. It has produced good and practical effects, and has improved multiple functions compared with existing oil-water separation materials and preparation methods, so it is more suitable for practical use and has wide industrial utilization value. It is truly a novel, progressive and practical new design.

[0027] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings.

[0028] The specific oil-water separation material and preparation method thereof of the present invention are described in detail by the following examples and accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1A schematic flow chart of a method for preparing an oil-water separation material provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0030] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the following is a detailed description of the method for preparing the oil-water separation material proposed by the present invention and its specific implementation method, etc., in combination with the accompanying drawings and preferred embodiments.

[0031] See also Figure 1 As shown, the method for preparing the oil-water separation material in a preferred embodiment of the present invention mainly comprises the following steps:

[0032] S1. Pretreating waste ultra-high molecular weight polyethylene fibers to prepare non-woven fabrics.

[0033] S2. Performing plasma treatment and surface treatment on the non-woven fabric to obtain the treated non-woven fabric.

[0034] S3. Performing functional treatment on the treated non-woven fabric to obtain an oil-water separation material.

[0035] Among them, the functionalization treatment includes soaking the treated non-woven fabric in an organic solution and a metal salt solution in turn, growing a separation material on the treated non-woven fabric to obtain an oil-water separation material.

[0036] The oil-water separation material prepared by the preparation method of the oil-water separation material provided in the embodiment of the present invention is based on the use of waste ultra-high molecular weight polyethylene fiber as the basic material, which realizes the reuse of waste ultra-high molecular weight polyethylene fiber as waste, thereby reducing the preparation cost. In addition, the embodiment of the present invention soaks the non-woven fabric in an organic solution and a metal salt solution successively, and grows a separation material on the treated non-woven fabric. The obtained oil-water separation material has a high oil-water separation effect after experiments, and the separation efficiency reaches more than 95.26%.

[0037] The following will further explain and describe the method for preparing the oil-water separation material machine provided by the present invention through optional embodiments.

[0038] S1. Pretreating waste ultra-high molecular weight polyethylene fibers to prepare non-woven fabrics.

[0039] The waste fibers of ultra-high molecular weight polyethylene fibers are sorted and cut into short fibers to prepare non-woven fabrics.

[0040] S2. Performing plasma treatment and surface treatment on the non-woven fabric to obtain the treated non-woven fabric.

[0041] The power of the plasma treatment may be 16 kVA to 18 kVA, such as 16 kVA, 17 kVA or 17 kVA, etc. The current frequency may be adjusted to 50 kHz to 90 kHz, such as 50 kHz, 55 kHz, 60 kHz, 65 kHz, 70 kHz, 75 kHz, 80 kHz, 85 kHz or 90 kHz, etc.

[0042] Wherein, in step S2 of the present invention, the nonwoven fabric is subjected to surface treatment under active gas or inert gas. According to an optional embodiment of the present invention, the nonwoven fabric is subjected to plasma treatment and surface treatment in sequence under active gas or inert gas.

[0043] According to an optional embodiment of the present invention, the active gas includes at least one of air, O2, NH3 and CO2, and the inert gas includes at least one of N2, He, Ar and CF4. Exemplarily, the active gas can be air, O2, NH3 or CO2 alone, or a mixture of two or more of air, O2, NH3 or CO2. Exemplarily, the inert gas can be N2, He, Ar or CF4 alone, or a mixture of two or more of N2, He, Ar or CF4.

[0044] According to an optional embodiment of the present invention, the organic solution includes 2-methylimidazole and methanol.

[0045] According to an optional embodiment of the present invention, the mass ratio of 2-methylimidazole to methanol is 0.2 to 1: 10. For example, the mass ratio of 2-methylimidazole to methanol can be 0.2: 10, 0.3: 10, 0.4: 10, 0.5: 10, 0.6: 10, 0.7: 10, 0.8: 10, 0.9: 10 or 1: 10, etc.

[0046] According to an optional embodiment of the present invention, the metal salt solution is a mixture of Zn(NO3)2 and deionized water. The metal salt solution is 0.5g-3g, such as 0.5g, 0.7g, 0.8g, 0.9g, 1g, 1.5g, 1.6g, 2g, 2.1g, 2.4g, 2.5g, 2.8g, 2.9g, 3g, preferably 1g-2g Zn(NO3)2 is placed in 100mL deionized water and ultrasonicated for 30min.

[0047] According to an optional embodiment of the present invention, the mass ratio of Zn(NO3)2 to deionized water is 0.5 to 30:100. For example, the mass ratio of Zn(NO3)2 to deionized water can be 0.5:100, 0.6:100, 1:100, 4:100, 5:100, 8:100, 9:100, 10:100, 11:100, 14:100, 18:100, 20:100, 25:100, 26:100 or 30:100, etc.

[0048] Exemplarily, the organic solution includes 2-methylimidazole and methanol, wherein the 2-methylimidazole may be 2g-10g, for example, 2g, 3g, 4g, 5g, 6g, 7g, 8g, 9g, 10g, preferably 3-5g, and the methanol may be 100mL.

[0049] S3. Performing functional treatment on the treated non-woven fabric to obtain an oil-water separation material.

[0050] According to an optional embodiment of the present invention, the treated non-woven fabric is immersed in an organic solution for 1-2 hours, and then immersed in a metal salt solution for 3 hours to 18 hours. Further, the non-woven fabric after plasma treatment is immersed in a mixed solution of 2-methylimidazole and Zn(NO3)2 for 3-18 hours, preferably 5-12 hours.

[0051] According to an optional embodiment of the present invention, the method further includes growing a separation material on the treated non-woven fabric, soaking the non-woven fabric in deionized water for 12 hours to 14 hours, and drying the non-woven fabric to obtain an oil-water separation material.

[0052] On the other hand, an oil-water separation material is provided, and the oil-water separation material is prepared by any of the above-mentioned methods for preparing the oil-water separation material.

[0053] The present invention is further described below by way of examples, the purpose of which is to provide a better understanding of the content of the present invention. Therefore, the examples given do not limit the protection scope of the present invention.

[0054] Example 1

[0055] Ultra-high molecular weight polyethylene fiber waste is sorted and cut into short fibers to prepare non-woven fabrics. A normal pressure plasma device (plasma devices in the prior art can be used) is provided to carry out plasma treatment under a certain air, and surface treatment is carried out. The power of the plasma is 16kVA, and the current frequency is adjusted to 70kHz. An organic solution is prepared, consisting of 2-methylimidazole and methanol, 3g of 2-methylimidazole, and 100mL of methanol. A metal salt solution is prepared by placing 1.0g of Zn(NO3)2 in 100mL of deionized water and ultrasonicating for 30min. The non-woven fabric after plasma treatment is placed in a mixed solution of 2-methylimidazole and Zn(NO3)2 and immersed for 12h. The non-woven fabric is placed in deionized water and soaked for 12h, dried, and the oil-water separation material of the present embodiment is obtained.

[0056] The oil-water separation material obtained above was subjected to a decahydronaphthalene oil-water separation test: in the decahydronaphthalene oil-water separation with a decahydronaphthalene content of 10%, a separation efficiency of 95.26% was obtained.

[0057] Example 2

[0058] The waste ultra-high molecular weight polyethylene fiber is sorted and cut into short fibers to prepare a non-woven fabric. The atmospheric pressure plasma equipment is subjected to plasma treatment under a certain air condition for surface treatment. The plasma power is 16kVA and the current frequency is adjusted to 70kHz. An organic solution is prepared, which is composed of 2-methylimidazole and methanol, 4g of 2-methylimidazole and 100mL of methanol. A metal salt solution is prepared by placing 1.0g of Zn(NO3)2 in 100mL of deionized water for ultrasonication for 30min. The non-woven fabric after plasma treatment is placed in a mixed solution of 2-methylimidazole and Zn(NO3)2 and immersed for 12h. The non-woven fabric is soaked in deionized water for 12h and dried to obtain the oil-water separation material of the present embodiment.

[0059] The oil-water separation material obtained above was subjected to a decahydronaphthalene oil-water separation test: in the decahydronaphthalene oil-water separation with a decahydronaphthalene content of 10%, a separation efficiency of 96.16% was obtained.

[0060] Example 3

[0061] The waste ultra-high molecular weight polyethylene fiber is sorted and cut into short fibers to prepare a non-woven fabric. The atmospheric pressure plasma equipment is subjected to plasma treatment under a certain air condition for surface treatment. The plasma power is 16kVA and the current frequency is adjusted to 70kHz. An organic solution is prepared, which is composed of 2-methylimidazole and methanol, 5g of 2-methylimidazole and 100mL of methanol. A metal salt solution is prepared by placing 1.0g of Zn(NO3)2 in 100mL of deionized water for ultrasonication for 30min. The non-woven fabric after plasma treatment is placed in a mixed solution of 2-methylimidazole and Zn(NO3)2 and immersed for 12h. The non-woven fabric is soaked in deionized water for 12h and dried to obtain the oil-water separation material of the present embodiment.

[0062] The oil-water separation material obtained above was subjected to a decahydronaphthalene oil-water separation test: in the decahydronaphthalene oil-water separation with a decahydronaphthalene content of 10%, a separation efficiency of 96.34% was obtained.

[0063] Example 4

[0064] The waste ultra-high molecular weight polyethylene fiber is sorted and cut into short fibers to prepare a non-woven fabric. The atmospheric pressure plasma equipment is subjected to plasma treatment under a certain air condition for surface treatment. The plasma power is 16kVA and the current frequency is adjusted to 80kHz. An organic solution is prepared, which is composed of 2-methylimidazole and methanol, 3g of 2-methylimidazole and 100mL of methanol. A metal salt solution is prepared by placing 1.0g of Zn(NO3)2 in 100mL of deionized water for ultrasonication for 30min. The non-woven fabric after plasma treatment is placed in a mixed solution of 2-methylimidazole and Zn(NO3)2 and immersed for 12h. The non-woven fabric is soaked in deionized water for 12h and dried to obtain the oil-water separation material of the present embodiment.

[0065] The oil-water separation material obtained above was tested for decahydronaphthalene oil-water separation: in the decahydronaphthalene oil-water separation with a decahydronaphthalene content of 10%, a separation efficiency of 96.63% was obtained.

[0066] Example 5

[0067] The waste ultra-high molecular weight polyethylene fiber is sorted and cut into short fibers to prepare a non-woven fabric. The atmospheric pressure plasma equipment is subjected to plasma treatment under a certain air condition for surface treatment. The plasma power is 16kVA and the current frequency is adjusted to 70kHz. An organic solution is prepared, which is composed of 2-methylimidazole and methanol, 3g of 2-methylimidazole and 100mL of methanol. A metal salt solution is prepared by placing 1.0g of Zn(NO3)2 in 100mL of deionized water for ultrasonication for 30min. The non-woven fabric after plasma treatment is placed in a mixed solution of 2-methylimidazole and Zn(NO3)2 and immersed for 10h. The non-woven fabric is soaked in deionized water for 12h and dried to obtain the oil-water separation material of the present embodiment.

[0068] The oil-water separation material obtained above was subjected to a decahydronaphthalene oil-water separation test: in the decahydronaphthalene oil-water separation with a decahydronaphthalene content of 10%, a separation efficiency of 96.56% was obtained.

[0069] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with this profession can make some changes or modifications to equivalent embodiments of equivalent changes by using the methods and technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A method for preparing an oil-water separation material, characterized in that: The method comprises: S1, pretreating waste ultra-high molecular weight polyethylene fibers to prepare non-woven fabrics; S2, performing plasma treatment and surface treatment on the non-woven fabric to obtain a treated non-woven fabric; S3, performing functional treatment on the treated non-woven fabric to obtain the oil-water separation material; The functionalization treatment comprises soaking the treated non-woven fabric in an organic solution and a metal salt solution in turn, growing a separation material on the treated non-woven fabric to obtain the oil-water separation material.

2. The method for preparing the oil-water separation material according to claim 1, characterized in that: The nonwoven fabric is sequentially subjected to plasma treatment and surface treatment under active gas or inert gas.

3. The method for preparing the oil-water separation material according to claim 2, characterized in that: The active gas includes at least one of air, O2, NH3 and CO2, and the inert gas includes at least one of N2, He, Ar and CF4.

4. The method for preparing the oil-water separation material according to claim 1, characterized in that: The organic solution includes 2-methylimidazole and methanol.

5. The method for preparing the oil-water separation material according to claim 4, characterized in that: in, The mass ratio of the 2-methylimidazole to methanol is 0.2 to 1:

10.

6. The method for preparing the oil-water separation material according to claim 1, characterized in that: The metal salt solution is a mixture of Zn(NO3)2 and deionized water.

7. The method for preparing the oil-water separation material according to claim 6, characterized in that: The mass ratio of Zn(NO3)2 to deionized water is 0.5-30:

100.

8. The method for preparing an oil-water separation material according to claim 1, characterized in that: The treated nonwoven fabric is immersed in the organic solution for 1-2 hours, and then immersed in the metal salt solution for 3 hours to 18 hours.

9. The method for preparing an oil-water separation material according to claim 1, characterized in that: The method also includes growing a separation material on the treated non-woven fabric, soaking the non-woven fabric in deionized water for 12 hours to 14 hours, and drying the non-woven fabric to obtain the oil-water separation material.

10. An oil-water separation material, characterized in that: The oil-water separation material is prepared by the method for preparing an oil-water separation material according to any one of claims 1-9.

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