Cushion based on chlorine dioxide sustained-release material and preparation method and application thereof

Abstract

The invention relates to a cushion based on a chlorine dioxide sustained-release material as well as a preparation method and application of the cushion, and relates to the technical field of sustained-release materials and hygienic products. The cushion comprises cloth fibers and a chlorine dioxide slow-release material loaded in the cloth fibers; the chlorine dioxide sustained-release material comprises a core layer and a polymer shell layer coating the core layer, and raw materials of the core layer comprise a powder material for generating chlorine dioxide gas and a drying agent. The cushion based on the chlorine dioxide sustained-release material can effectively kill bacteria and remove peculiar smell in the using process by continuously releasing chlorine dioxide gas, and the risk of cross infection of skin diseases when different people use closestools is remarkably reduced.

Description

Technical Field

[0001] The present invention relates to the technical fields of sustained-release materials and hygiene products, and particularly relates to a toilet seat based on a chlorine dioxide sustained-release material, a preparation method thereof, and an application thereof. Background Art

[0002] With the continuous improvement of people's attention to health, the demand for hygiene products with bactericidal and deodorant functions is increasing day by day. As a common facility in families and public places, the hygiene condition of toilets is directly related to the health of users. However, traditional toilet seats are mostly made of ordinary materials and lack effective bactericidal and deodorant functions. Especially in the environment where multiple people share, they are prone to become breeding and spreading sources of bacteria and odors. Bacterial contamination not only causes environmental hygiene problems, but may also cause cross-infection through skin contact, increasing the risk of skin disease transmission.

[0003] Due to its excellent broad-spectrum bactericidal performance and high-efficiency deodorant effect, chlorine dioxide has been widely used in fields such as food processing, medical and health, and environmental disinfection in recent years. However, chlorine dioxide has strong volatility and activity. Direct use is likely to cause rapid dissipation, making it difficult to maintain an effective concentration for a long time, and there are certain safety hazards during storage and use. For this reason, sustained-release technology has been proposed to extend the action time of chlorine dioxide. By combining chlorine dioxide release raw materials with sustained-release materials, a stable sustained-release effect can be achieved.

[0004] Currently, common bactericidal toilet seats on the market are mostly made by using nano-silver loading technology. Although nano-silver materials have good bactericidal performance, they have two significant disadvantages: one is that nano-silver is expensive, resulting in a high product cost; the other is that nano-silver only has a bactericidal effect and has limited ability to remove odors. Therefore, bactericidal toilet seats loaded with nano-silver are difficult to meet users' comprehensive requirements for deodorization and sterilization in terms of functionality.

[0005] In addition, common chlorine dioxide sustained-release materials are mostly sustained-release gels or sustained-release membranes. Although these materials have good sustained-release performance, the sustained-release gel itself is a soft material and it is difficult to firmly adhere to the fiber fabric of the toilet seat, which limits its practicality. At the same time, the sustained-release gel is easily affected by external humidity and friction, and its stability and durability are further limited in public places with high usage frequencies. In view of this, the present invention provides a toilet seat based on a chlorine dioxide sustained-release material, a preparation method thereof, and an application thereof. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a toilet seat based on a chlorine dioxide sustained-release material, a preparation method thereof, and an application thereof. The purpose is to provide a toilet seat that has both bactericidal and deodorant functions.

[0007] The technical solution of the present invention for solving the above technical problems is as follows: In a first aspect, a seat cushion based on a chlorine dioxide sustained-release material, the seat cushion comprising fabric fibers and a chlorine dioxide sustained-release material loaded in the fabric fibers; The chlorine dioxide sustained-release material comprises a core layer and a polymer shell layer coating the core layer, and the raw materials of the core layer include a powder material for generating chlorine dioxide gas and a desiccant.

[0008] Principle: The seat cushion based on the chlorine dioxide sustained-release material of the present invention can effectively kill bacteria, remove odors, and significantly reduce the risk of cross-infection of skin diseases when different people use the toilet by continuously releasing chlorine dioxide gas. The desiccant is used to regulate the humidity of the internal environment of the microcapsule to control the release rate of chlorine dioxide gas.

[0009] The beneficial effects of the present invention are as follows: (1) Dual functionality: Compared with traditional nano-silver antibacterial materials, the seat cushion based on the chlorine dioxide sustained-release material of the present invention has both excellent antibacterial and deodorizing functions, providing more comprehensive hygiene protection.

[0010] (2) Economy: The cost of chlorine dioxide raw materials is relatively low, and the preparation process of the sustained-release material is simple, significantly reducing the product cost.

[0011] (3) Applicability: The chlorine dioxide sustained-release material prepared by the microcapsule technology can be firmly loaded into the fabric fibers of the seat cushion, ensuring good stability and durability even in an environment with high humidity and high usage frequency.

[0012] (4) Safety and environmental protection: The design of the chlorine dioxide sustained-release material ensures the slow release of chlorine dioxide, not only improving the safety of use but also avoiding possible secondary pollution problems during the use of traditional disinfectants.

[0013] (5) The deodorizing and antibacterial seat cushion of the present invention can significantly reduce the risk of cross-infection of skin diseases caused by multiple people using the toilet, and is applicable to families, public health facilities and medical institutions. Especially in an environment where multiple people share, it can significantly improve the hygiene level and user experience, providing an economic, efficient and safe solution for the hygiene field.

[0014] On the basis of the above technical solutions, the present invention can be further improved as follows.

[0015] Further, the weight ratio of the fabric fibers to the chlorine dioxide sustained-release material is 100:1 - 10:1.

[0016] The beneficial effect of adopting the above further scheme is that under the action of moisture in the air, the chlorine dioxide sustained-release material continuously releases chlorine dioxide gas with deodorizing and antibacterial effects, enabling the fabric fibers to initially have relatively long-lasting deodorizing and antibacterial effects.

[0017] Further, the weight ratio of the raw materials of the core layer to the raw materials of the polymer shell layer is 1:0.2 - 1:10, preferably 1:3 - 1:5; and / or, the mass ratio of the powder material for generating chlorine dioxide gas to the desiccant is 1:0.05 - 1:3, preferably 1:0.5 - 1:1.5.

[0018] The beneficial effect of adopting the above further scheme is that it can avoid the reaction of releasing chlorine dioxide by the chlorine dioxide slow-release material during storage under the action of water molecules in the air before formal use.

[0019] Further, the raw materials of the polymer shell layer include at least one of polystyrene, modified cellulose, polyethylene, polyvinyl chloride, polypropylene, polymethyl methacrylate, and polytetrafluoroethylene; and / or, the powder material for generating chlorine dioxide gas includes sodium chlorite and a reaction aid; the reaction aid includes at least one of an acidic solid powder and a persulfate; the acidic solid powder includes citric acid, etc.; the persulfate includes potassium persulfate, etc.; and / or, the desiccant includes at least one of anhydrous calcium chloride, anhydrous calcium sulfate, molecular sieve, silica gel, and montmorillonite.

[0020] The beneficial effect of adopting the above further scheme is to achieve the continuous and stable release of chlorine dioxide, a bactericidal and deodorizing gas.

[0021] Further, the mass ratio of the sodium chlorite to the reaction aid is 1:0.05 - 1:2, preferably 1:0.5 - 1:1.2.

[0022] The beneficial effect of adopting the above further scheme is to make full use of the sodium chlorite component.

[0023] In the second aspect, a preparation method of a seat cushion based on a chlorine dioxide slow-release material includes the following steps: (1) Prepare the chlorine dioxide slow-release material: In an oil phase system, adopt microencapsulation technology to embed the raw materials of the core layer in the polymer shell layer to obtain the chlorine dioxide slow-release material; (2) Load the chlorine dioxide slow-release material: Load the chlorine dioxide slow-release material into the fabric fibers of the seat cushion to obtain a seat cushion based on the chlorine dioxide slow-release material.

[0024] The beneficial effects of adopting the above - mentioned solution are as follows: By using the micro - capsule technology in the oil - phase system, the raw materials of the core layer that can release chlorine dioxide gas are embedded in the polymer shell layer to prepare a solid - state slow - release material. This can not only effectively control the release rate of chlorine dioxide, but also firmly load the slow - release material into the cushion fabric fibers through various loading methods (such as impregnation method, coating method), overcoming the problem that it is difficult to load the slow - release gel. At the same time, the product cost is significantly reduced, providing a dual effect of sterilization and deodorization.

[0025] Further, in step (1), the adoption of the micro - capsule technology in the oil - phase system includes the coacervation micro - encapsulation technology or the polymerization micro - encapsulation technology in the oil phase.

[0026] The beneficial effects of adopting the above - mentioned further solution are as follows: The slow - release material prepared by the micro - capsule technology can continuously release chlorine dioxide gas for sterilization and deodorization.

[0027] Further, in step (1), the oil - phase system includes an oil - phase solvent and an emulsifier; The oil - phase solvent includes at least one of paraffin, toluene, benzene, xylene, dichloromethane, chloroform; the emulsifier includes at least one of Tween 80, AEO - 3, OP - 15, OP - 10. The amounts of the oil - phase solvent and the emulsifier are reasonable.

[0028] Further, in step (2), the method of loading the chlorine dioxide slow - release material onto the fabric fibers of the cushion is the coating method or the impregnation method.

[0029] In the third aspect, an application of a cushion based on a chlorine dioxide slow - release material is provided, and the cushion based on the chlorine dioxide slow - release material is used for sterilization and / or deodorization.

[0030] The beneficial effects of adopting the above - mentioned solution are as follows: The cushion based on the chlorine dioxide slow - release material of the present invention has both sterilization and deodorization functions, and can significantly reduce the risk of cross - infection of skin diseases when different people use the toilet. Description of the Drawings

[0031] Figure 1 It is the electron microscope scanning image of the slow - release material prepared in Example 1 of the present invention. Detailed Embodiments

[0032] The principles and features of the present invention are described below. The examples given are only used to explain the present invention and are not intended to limit the scope of the present invention. For those not specifying specific techniques or conditions in the examples, they shall be in accordance with the techniques or conditions described in the literature in this field or in accordance with the product specifications. For the reagents or instruments not indicating the manufacturer, they are all conventional products that can be purchased through regular channels.

[0033] Example 1: A preparation method of a seat cushion based on chlorine dioxide slow-release material according to this embodiment includes the following steps: (1) Preparation of the slow-release material: Raw material ratio: Weigh 10 g of sodium chlorite and 6 g of citric acid powder (mass ratio is 1:0.6), and mix evenly; weigh 5 g of anhydrous calcium chloride as a desiccant, and the mass ratio with sodium chlorite is 1:0.5.

[0034] Preparation of the oil phase system: Add 200 mL of liquid paraffin as the oil phase solvent to a 500 mL beaker, and add 2 g of emulsifier (Tween 80) and stir evenly.

[0035] Dispersion process: After mixing the powder raw materials with the desiccant, slowly add them to the oil phase system, and stir at high speed (2000 rpm) for 20 minutes to form a uniform dispersion system.

[0036] Polymerization reaction: Add 30 g of polystyrene monomer and 0.5 g of cross-linking agent (methylene bisacrylamide) to the dispersion system, and add 0.2 g of initiator (azobisisobutyronitrile dissolved in 1 mL of toluene). Stir and react at 25 °C for 3 hours to form microcapsules encapsulating chlorine dioxide powder and desiccant.

[0037] Collection and drying: After cooling to room temperature, separate the microcapsules by centrifugation, wash them 3 times with ethanol, and dry to obtain the slow-release powder material ( Figure 1 )

[0038] (2) Loading of the slow-release material: Coating method: Mix 5 g of the slow-release powder material with 50 g of oil-based epoxy resin adhesive evenly, and evenly coat the inner surface of the fabric fibers of the toilet seat cushion by brush coating. After standing for 30 minutes, dry at 70 °C to form a deodorizing and bactericidal coating.

[0039] Example 2: A preparation method of a seat cushion based on chlorine dioxide slow-release material according to this embodiment includes the following steps: (1) Preparation of the slow-release material: Raw material ratio: Weigh 10 g of sodium chlorite and 8 g of potassium persulfate (mass ratio is 1:0.8), and mix evenly; weigh 7 g of anhydrous calcium sulfate as a desiccant, and the mass ratio with the powder raw materials is 1:0.7.

[0040] Preparation of the oil phase system: Add 250 mL of toluene, 20 g of ethyl cellulose and 3 g of emulsifier (Tween 80) to a 500 mL beaker, and stir evenly to form an oil phase system.

[0041] Dispersion process: Slowly add the powder raw material and the desiccant into the oil phase, and stir at high speed (500 rpm) for 15 minutes to form a uniform dispersion system.

[0042] Coagulation reaction: After adding 250 mL of polydimethylsiloxane dropwise to the dispersion system, continuously stir for 2 hours to form microcapsules of chlorine dioxide powder and desiccant embedded in ethyl cellulose.

[0043] Collection and drying: After the reaction is completed, cool to room temperature, separate the microcapsules by centrifugation, wash them 3 times with n-hexane, and obtain the modified sustained-release powder material after drying.

[0044] (2) Loading of the sustained-release material: Coating method: Mix 5 g of the sustained-release powder material evenly with 50 g of the oil-based polyurethane adhesive, and evenly coat it on the surface of the fabric fibers of the toilet seat by the doctor blade method. After standing for 30 minutes, dry it at 40 °C to form a deodorizing and bactericidal coating.

[0045] Example 3: A preparation method of a toilet seat based on a chlorine dioxide sustained-release material involved in this example includes the following steps: (1) Preparation of the sustained-release material: Raw material ratio: Weigh 20 g of sodium chlorite, 15 g of citric acid powder (mass ratio of 1:0.75), and 10 g of anhydrous calcium chloride (mass ratio of 1:0.5).

[0046] Preparation of the oil phase system: Add 800 mL of liquid paraffin as the oil phase solvent to a 2 L reaction kettle, and add 5 g of emulsifier (Tween 80), and stir evenly to form an oil phase system.

[0047] Dispersion process: After mixing sodium chlorite, citric acid powder and anhydrous calcium chloride, slowly add them into the oil phase system, and stir at high speed (2000 rpm) for 30 minutes to form a stable dispersion system.

[0048] Polymerization reaction: Add 100 g of polyvinyl chloride monomer and 1 g of initiator (azobisisobutyronitrile, dissolved in 5 mL of anhydrous toluene) to the dispersion system. Under the condition of 70 °C, continuously stir and react for 4 hours to form microcapsules embedding chlorine dioxide powder and desiccant.

[0049] Collection and drying: After the reaction is completed, cool to room temperature, separate the microcapsules by centrifugation, wash them 5 times with absolute ethanol to remove the excess oil phase, and finally dry them at 50 °C to obtain the industrial sustained-release powder material.

[0050] (2) Loading of the sustained-release material: Coating method: 10 g of the slow-release powder material was evenly mixed with 100 g of the oil-based epoxy resin binder, and then evenly sprayed onto the inner surface of the toilet seat fabric fibers using an automatic spraying device. After standing for 1 hour, it was dried at 70 °C to form a firmly attached deodorizing and bactericidal coating.

[0051] Comparative Example 1: Compared with Example 1, except that the chlorine dioxide slow-release material was not used, the rest was the same as in Example 1.

[0052] Comparative Example 2: Compared with Example 1, no desiccant was added during the preparation of the chlorine dioxide slow-release material, and the rest was the same as in Example 1.

[0053] Test Example: (1) Bactericidal effect: Under normal temperature and a closed condition with an air humidity of 60%, according to WS / T 650-2019 "Evaluation Methods for Antibacterial and Bacteriostatic Effects", the test strain solutions were sprayed onto the surface of the deodorizing and bactericidal toilet seat prepared in this example on the 1st, 15th, and 30th days respectively, and the antibacterial performance was detected 30 minutes after spraying the strain solutions. The test strains included Escherichia coli (Thermo Fisher), Staphylococcus aureus (Thermo Fisher), and Candida albicans (Thermo Fisher). The test results are shown in Table 1, and the sterilization rate reached over 99.9% within the 30-day experimental period.

[0054] Table 1 (2) Deodorizing effect: The toilet seat and the toilet simulated odor source were placed together in a closed box at room temperature and an air humidity of 60% to evaluate its deodorizing effect. The toilet odor source solution simulated in the experiment could continuously emit common ammonia (urine odor), hydrogen sulfide (putrid odor), and indole (fecal odor) in the toilet. During the test, the odor source solution continuously released odor gases into the closed environment, and the sensory evaluation of the odor in the closed environment was carried out by the subjects on the 1st, 15th, and 30th days. The results are shown in Table 2 and scored with reference to Table 3.

[0055] Table 2 Table 3 As can be seen from Tables 2 and 3, Comparative Example 1 had basically no deodorizing effect on the odor in the air; Comparative Example 2 showed good odor removal ability in the early stage, but the odor removal performance decreased sharply in the later stage of the experiment; Examples 1, 2, and 3 showed a persistent and excellent odor removal effect.

[0056] (3) Chlorine dioxide slow-release effect Place the seat cushion in a sealed room at room temperature and an air humidity of 60% to evaluate its deodorization effect. The volume of the experimental room is 6 m 3 , and on the 1st, 15th, and 30th days of the experiment, quantitatively measure the concentration of chlorine dioxide gas in the sealed room by BZ / T 160∙37-2004 Determination of Toxic Substances in Workplace Air Chlorides. Table 4.

[0057] Table 4 As can be seen from Table 4, in Comparative Example 1, no effective component of chlorine dioxide gas was released. In Comparative Example 2, a high concentration of chlorine dioxide was released in the early stage, but the release concentration of chlorine dioxide decreased sharply in the later stage; Examples 1, 2, and 3 showed a persistent and stable chlorine dioxide release ability.

[0058] In summary, the seat cushion based on the chlorine dioxide slow-release material of the present invention can effectively kill bacteria, remove odors, and significantly reduce the risk of cross-infection of skin diseases when different people use the toilet by continuously releasing chlorine dioxide gas. The desiccant is used to regulate the humidity inside the microcapsule to control the release rate of chlorine dioxide gas. It can significantly reduce the risk of cross-infection of skin diseases caused by multiple people using the toilet, and is applicable to families, public health facilities and medical institutions. Especially in the environment shared by multiple people, it can significantly improve the hygiene level and user experience, providing an economical, efficient and safe solution for the hygiene field.

[0059] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A seat cushion based on chlorine dioxide slow-release material, characterized in that: The seat cushion comprises cloth fibers and chlorine dioxide slow-release material loaded in the cloth fibers; The chlorine dioxide slow-release material comprises a core layer and a polymer shell layer covering the core layer, and the raw materials of the core layer comprise a powder material and a desiccant for generating chlorine dioxide gas; The weight ratio of the fabric fiber to the chlorine dioxide slow-release material is 100:1-10:1; The mass ratio of the powder material for generating chlorine dioxide gas to the desiccant is 1:0.05-1:3; The desiccant includes at least one of anhydrous calcium chloride, anhydrous calcium sulfate, molecular sieve, silica gel, and montmorillonite; The method for preparing a seat cushion based on a chlorine dioxide slow-release material comprises the following steps: (1) Preparation of chlorine dioxide sustained-release material: using microencapsulation technology in an oil phase system to embed the raw material of the core layer into the polymer shell layer to obtain a chlorine dioxide sustained-release material; (2) Loading of chlorine dioxide slow-release material: The chlorine dioxide slow-release material is loaded into the fabric fibers of the seat cushion to obtain a seat cushion based on the chlorine dioxide slow-release material.

2. A seat cushion based on chlorine dioxide slow-release material according to claim 1, characterized in that: The weight ratio of the raw material of the core layer to the raw material of the polymer shell layer is 1:0.2-1:

10.

3. A seat cushion based on chlorine dioxide slow-release material according to claim 1, characterized in that: The raw material of the polymer shell layer includes at least one of polystyrene, modified cellulose, polyethylene, polyvinyl chloride, polypropylene, polymethyl methacrylate, and polytetrafluoroethylene; And / or, the powder material for generating chlorine dioxide gas includes sodium chlorite and a reaction aid; the reaction aid includes at least one of an acidic solid powder and a persulfate.

4. A seat cushion based on chlorine dioxide slow-release material according to claim 3, characterized in that: The mass ratio of the sodium chlorite to the reaction aid is 1:0.05-1:

2.

5. A seat cushion based on chlorine dioxide slow-release material according to claim 1, characterized in that: In step (1), the microencapsulation technology used in the oil phase system includes a microencapsulation embedding technology using a coacervation method in the oil phase or a microencapsulation embedding technology using a polymerization method in the oil phase.

6. A seat cushion based on chlorine dioxide slow-release material according to claim 1, characterized in that: The oil phase system in step (1) comprises an oil phase solvent and an emulsifier; The oil phase solvent includes at least one of paraffin, toluene, benzene, xylene, dichloromethane and chloroform; the emulsifier includes at least one of Tween 80, AEO-3, OP-15 and OP-10.

7. A seat cushion based on chlorine dioxide slow-release material according to claim 1, characterized in that: In step (2), the method for loading the chlorine dioxide slow-release material into the fabric fibers of the seat cushion is a coating method or an impregnation method.

8. An application of a seat cushion based on chlorine dioxide slow-release material, characterized in that: The seat cushion based on chlorine dioxide slow-release material as claimed in any one of claims 1 to 4 is used for sterilization and / or deodorization.

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