Waterproof and antistatic fabric and preparation method thereof

Abstract

The invention relates to the technical field of multifunctional fabrics, in particular to a waterproof and antistatic fabric and a preparation method thereof.The fabric sequentially comprises a super-hydrophobic protective layer, an efficient conductive buffer layer and a moisture absorption and sweat releasing comfortable layer from outside to inside, the super-hydrophobic protective layer comprises an organic silicon coating, the organic silicon coating contains a micropore structure, and the efficient conductive buffer layer is arranged between the micropore structure and the moisture absorption and sweat releasing comfortable layer. Boron nitride nanosheets and zinc oxide quantum dots are doped in the organic silicon coating; the efficient conductive buffer layer comprises a latticed layer formed by interweaving polylactic acid fibers and copper nanowire composite fibers, and a two-dimensional transition metal carbide derivative and a temperature-sensitive phase change material are loaded on the efficient conductive buffer layer; the moisture-absorbing and sweat-releasing comfortable layer comprises a modal blended material doped with natural rubber microcapsules and chitosan microspheres, and a moisture-sensitive material accounting for 1-3 wt% of the mass of the moisture-absorbing and sweat-releasing comfortable layer is added to the moisture-absorbing and sweat-releasing comfortable layer.

Description

Technical Field

[0001] The invention relates to the technical field of multifunctional fabrics, in particular to a waterproof and antistatic fabric and a preparation method thereof. Background Art

[0002] In modern society, especially in industry, military and outdoor activities, the demand for protective clothing is increasing. There are various potential hazards in these environments, such as water immersion, fire or explosion caused by static sparks, etc. Therefore, the development of fabrics with both waterproof and antistatic functions is crucial to ensure the safety of workers. However, existing waterproof and antistatic fabrics still face many challenges in practical applications, such as:

[0003] Limited anti-static properties

[0004] Single conductive layer: Some products only achieve anti-static function by adding metal fiber or carbon fiber, but this may affect the feel and comfort of the fabric.

[0005] Risk of static electricity accumulation: Although some materials have a certain degree of conductivity, they are prone to static electricity accumulation in a dry environment, increasing the risk of spark discharge.

[0006] Durability issues: After long-term use or frequent cleaning, the anti-static function may weaken or even lose.

[0007] Environmental and health considerations

[0008] The chemicals used in traditional waterproof and anti-static fabrics may be toxic or environmentally harmful, and long-term exposure is harmful to human health. In addition, some materials are not easy to degrade and do not meet modern environmental protection requirements.

[0009] But most importantly, the existing waterproof and antistatic fabrics have insufficient waterproof performance and poor functional compatibility:

[0010] Traditional waterproof fabrics mainly rely on coatings or membrane structures to block water penetration, but these materials often have poor air permeability, causing the wearer to feel stuffy and uncomfortable. In colder environments, they have a good thermal insulation effect, but in some high-temperature environments, workers have to endure the high temperature and stuffiness, as well as the discomfort of sweat staying on the body for a long time. In addition, after multiple washings, the coating of fabrics with coatings or membrane structures may gradually become ineffective, reducing the waterproof effect.

[0011] There are few fabrics that can simultaneously meet the requirements of high-efficiency waterproofing, good breathability and reliable anti-static functions, and compromises are usually required among various factors. For example, thick coatings are used to enhance the waterproof effect, which often sacrifices the flexibility and breathability of the fabric, thus affecting the anti-static performance and the wearer's comfort experience. Summary of the invention

[0012] In view of the deficiencies in the prior art, the present invention provides a waterproof and antistatic fabric and a preparation method thereof, which solves the problems of the above-mentioned background technology.

[0013] According to a first aspect of the present invention, a waterproof and antistatic fabric is provided, which comprises, from the outside to the inside, a super hydrophobic protective layer, a highly efficient conductive buffer layer and a moisture absorption and perspiration comfort layer, wherein:

[0014] Super hydrophobic protective layer: comprising an organic silicon coating, the organic silicon coating having a microporous structure, and doped with boron nitride nanosheets and zinc oxide quantum dots;

[0015] High-efficiency conductive buffer layer: comprising a grid-like layer formed by interweaving polylactic acid fibers and copper nanowire composite fibers, on which a two-dimensional transition metal carbide derivative and a temperature-sensitive phase change material are loaded;

[0016] Wherein, the two-dimensional transition metal carbide derivative is a two-dimensional transition metal carbide modified by surface treatment with polyvinyl alcohol and / or polyacrylic acid, and the temperature-sensitive phase change material accounts for 5-10wt% of the mass of the high-efficiency conductive buffer layer;

[0017] The moisture absorption and perspiration comfort layer comprises a modal blended material doped with natural rubber microcapsules and chitosan microspheres, and the moisture absorption and perspiration comfort layer is added with 1-3wt% of moisture-sensitive material by weight of the moisture absorption and perspiration comfort layer.

[0018] The organic silicon coating in the super-hydrophobic protective layer provides stable super-hydrophobic protection, while BNNS and ZnO quantum dots enhance the thermal conductivity and antibacterial ability of the fabric respectively. The combination of the three not only improves the overall protective performance of the fabric, but also ensures its reliability and safety in long-term use.

[0019] The PLA fibers in the efficient conductive buffer layer provide the basic structure and moisture absorption and perspiration performance, the copper nanowire composite fiber ensures an efficient conductive path, and the modified MXene derivative acts as a bridge to improve the connectivity between the copper nanowires, further improving the stability and functionality of the overall conductive network. In addition, the modified MXene can also enhance the adhesion of the silicone coating, ensuring that the fabric still maintains good waterproof performance after long-term use.

[0020] The modal blended material in the moisture-wicking comfort layer provides basic softness and moisture-wicking performance, the natural rubber microcapsules add extra elasticity and softness, and the chitosan microspheres maintain skin health by continuously releasing antibacterial ingredients. The combination of the three brings users an unprecedented wearing experience and significantly improves overall comfort.

[0021] Temperature-sensitive phase change materials remain soft and breathable when the temperature is low, allowing water vapor to pass through;

[0022] When the temperature rises, the material undergoes a phase change, becoming more loose or porous, increasing breathability, helping to maintain a stable internal temperature and improving wearing comfort.

[0023] When the humidity is low, the moisture-sensitive phase change material becomes hydrophilic and allows water vapor to pass through.

[0024] When humidity rises, the material becomes hydrophobic, preventing liquid moisture from penetrating and protecting the conductive buffer layer from moisture; when washed, the modified material is able to maintain its function and provide long-lasting protection.

[0025] Temperature-sensitive materials and moisture-sensitive materials work together to ensure that the smart responsive conductive buffer layer can effectively control moisture permeability and breathability under different environmental conditions, providing optimal wearing comfort and functionality.

[0026] According to an embodiment of the present invention, the super-hydrophobic protective layer comprises:

[0027] The organosilicon coating accounts for 85-90wt% of the weight of the super hydrophobic protective layer;

[0028] The boron nitride nanosheets account for 3-5wt% of the weight of the super hydrophobic protective layer;

[0029] Zinc oxide quantum dots: accounting for 2-4wt% of the weight of the super hydrophobic protective layer.

[0030] The super-hydrophobic protective layer uses a non-toxic and soft silicone coating to provide super-hydrophobic properties, effectively blocking water penetration; while keeping the fabric soft and comfortable, non-toxic and harmless to the human body. It has good weather resistance and environmental protection, and is suitable for products that come into direct contact with the skin.

[0031] Boron nitride nanosheets (BNNS) have excellent thermal conductivity and chemical stability. They are used to enhance the thermal conductivity and mechanical strength of fabrics, help to quickly dissipate heat and prevent local overheating.

[0032] Zinc oxide quantum dots (ZnO Quantum Dots) are smaller in size, have higher surface activity, and have stronger photocatalytic effects. They play a photocatalytic role under light conditions, helping to decompose organic matter adsorbed on the fiber and prevent bacterial growth; they also have antibacterial properties.

[0033] According to an embodiment of the present invention, the high-efficiency conductive buffer layer comprises:

[0034] The polylactic acid fiber accounts for 70-80wt% of the weight of the high-efficiency conductive buffer layer;

[0035] The copper nanowire composite fiber accounts for 15-20wt% of the weight of the high-efficiency conductive buffer layer;

[0036] The two-dimensional transition metal carbide derivative (modified MXene derivative): accounts for 2-5wt% of the weight of the high-efficiency conductive buffer layer;

[0037] The temperature-sensitive phase change material includes stearic acid and palmitic acid in a mass ratio of 2:3.

[0038] The highly efficient conductive buffer layer is a composite layer of polylactic acid fiber (PLA Fiber) and copper nanowire composite fiber. Polylactic acid fiber (PLA Fiber) is used as the basic structural fiber to provide good moisture absorption and perspiration performance and breathability. It is a biodegradable material and is environmentally friendly. Copper nanowire composite fiber is used to provide an efficient conductive path to ensure that static electricity can be quickly dissipated and reduce the risk of static electricity accumulation. Compared with precious metals such as silver, it is lower in cost and also has excellent conductivity and antibacterial properties.

[0039] Modified MXene derivatives: Improve the connectivity between copper nanowires, improve the stability and functionality of the overall conductive network; enhance the adhesion of the silicone coating to ensure that the fabric maintains good waterproof performance after long-term use. Its stability and versatility in water are enhanced through specific chemical modification methods.

[0040] According to an embodiment of the present invention, the moisture absorption and perspiration comfort layer comprises:

[0041] The modal blended material accounts for 85-90wt% of the weight of the moisture wicking comfort layer;

[0042] The natural rubber microcapsules account for 5-10 wt% of the weight of the moisture absorption and perspiration comfort layer;

[0043] The chitosan microspheres account for 3-5wt% of the weight of the moisture wicking comfort layer;

[0044] The moisture-sensitive material is modified poly N-isopropylacrylamide (modified PNIPAM);

[0045] The modified poly N-isopropylacrylamide is a poly N-isopropylacrylamide into which siloxane groups are introduced by copolymerization or grafting.

[0046] The moisture-wicking comfort layer uses modal blended material to provide a soft, lightweight wearing experience with good moisture-wicking performance. Modal blended material is derived from plant resources, is gentle on the skin and is not prone to allergic reactions.

[0047] Natural rubber microcapsules provide extra elasticity and softness, improving the touch; releasing trace amounts of rubber components through a sustained-release mechanism, promoting blood circulation, relieving muscle fatigue, and significantly improving wearing comfort. Naturally derived, safe and harmless to the human body, long-term wear will not cause discomfort.

[0048] Chitosan microspheres continuously release antibacterial ingredients to maintain skin health; absorb moisture and adjust skin pH. Extracted from chitin, it has good biocompatibility and antibacterial properties.

[0049] According to a second aspect of the present invention, there is provided a method for preparing the novel waterproof and antistatic fabric, comprising the following steps:

[0050] S1: Pre-treating the polylactic acid fiber, the copper nanowire composite fiber and the modal blended material;

[0051] S2: preparing a moisture wicking comfort layer;

[0052] S3: treating the polylactic acid fiber and copper nanowire composite fiber using a temperature-sensitive phase change material and a two-dimensional transition metal carbide derivative;

[0053] S4: weaving a mesh layer of polylactic acid fibers and copper nanowire composite fibers on the moisture absorption and perspiration comfort layer to form a high-efficiency conductive buffer layer loaded with the two-dimensional transition metal carbide derivative and the temperature-sensitive phase change material;

[0054] S5: introducing a moisture-sensitive material onto the efficient conductive buffer layer;

[0055] S6: spraying on the efficient conductive buffer layer to form an organic silicon coating doped with boron nitride nanosheets and zinc oxide quantum dots to obtain the waterproof and antistatic fabric.

[0056] According to an embodiment of the present invention, the pretreatment process of the polylactic acid fiber, the copper nanowire composite fiber and the modal blended material comprises:

[0057] The polylactic acid fiber, the copper nanowire composite fiber and the modal blended material were subjected to pretreatment operations of degreasing and bleaching respectively, and then immersed and rinsed in clean water at 40° C. and dried in a drying oven at 60° C.

[0058] According to an embodiment of the present invention, the preparation of the moisture absorption and perspiration comfort layer comprises:

[0059] Preparation of natural rubber microcapsules;

[0060] Preparation of chitosan microspheres;

[0061] The modal blended material is immersed in a fatty acid mixture, wherein the fatty acid mixture includes a mixture formed by dissolving stearic acid and palmitic acid in a mass ratio of 2:3 in an organic solvent, and the modal blended material is freeze-dried;

[0062] The natural rubber microcapsules and the chitosan microspheres are uniformly dispersed in the modal blended material by dipping or spraying the modal blended material;

[0063] The modal blended material is heated to 90-100° C. under the condition of 0.8-1 MPa to cure the natural rubber microcapsules;

[0064] Then the temperature is raised to 120-140° C. to solidify the chitosan microspheres to obtain the moisture absorption and perspiration comfort layer.

[0065] According to an embodiment of the present invention, the preparation of the natural rubber microcapsule mixed solution comprises:

[0066] Prepare a natural rubber solution, add Span-80 and / or Tween-80, and form a stable emulsion under high-speed stirring;

[0067] The emulsion is sprayed into an aqueous solution containing glutaraldehyde to form a microcapsule wall through an interfacial polymerization reaction;

[0068] After washing, centrifugal separation and drying, natural rubber microcapsules with a particle size of 5-10 μm are obtained.

[0069] According to an embodiment of the present invention, the preparation of the chitosan microsphere mixed solution comprises:

[0070] dissolving chitosan in a weakly acidic solution to form a chitosan solution;

[0071] Using a dropper, drop the chitosan solution dropwise into the oil phase containing glutaraldehyde;

[0072] After curing, washing and drying, chitosan microspheres with an average particle size of 3-5 μm are obtained.

[0073] According to an embodiment of the present invention, the preparation of the chitosan microsphere mixed solution specifically includes: dissolving chitosan in a weakly acidic solution (such as a 1% acetic acid aqueous solution), adjusting the pH value to about 4.5 to ensure that it is completely dissolved;

[0074] Using a dropper, dripping the chitosan solution drop by drop into the liquid paraffin containing glutaraldehyde, and using microfluidics technology to control the dripping speed and shape;

[0075] The chitosan microspheres are solidified at 120-140° C., and after washing and drying, chitosan microspheres with an average particle size of about 3-5 μm are obtained.

[0076] The introducing of moisture-sensitive material on the efficient conductive buffer layer comprises:

[0077] Dissolving N-isopropylacrylamide monomer and vinyltrimethoxysilane in deionized water to form a monomer solution with a concentration of 30 wt %, wherein the ratio of the N-isopropylacrylamide monomer to the vinyltrimethoxysilane is 90:10-95:5;

[0078] Adding ammonium persulfate to the monomer solution, wherein the ammonium persulfate is 0.5-1 wt % of the total weight of the N-isopropylacrylamide monomer and the vinyltrimethoxysilane;

[0079] Adding a cross-linking agent N,N'-methylenebisacrylamide, wherein the N,N'-methylenebisacrylamide is 0.5-2wt% of the total weight of the N-isopropylacrylamide monomer;

[0080] Under nitrogen protection, the polymerization reaction is carried out at 60-70°C until a gel-like product is formed;

[0081] washing and drying the gel-like product to obtain the moisture-sensitive material;

[0082] The moisture-sensitive material solution is sprayed or dipped onto the high-efficiency conductive buffer layer to ensure uniform coverage and solidification.

[0083] According to an embodiment of the present invention, the method further comprises preparing the two-dimensional transition metal carbide derivative (MXene derivative):

[0084] A two-dimensional transition metal carbide is selected as a substrate and a silane coupling agent is used to modify its surface;

[0085] Under nitrogen protection, dispersing the modified two-dimensional transition metal carbide in an ethanol solution, and ultrasonically treating for 30 minutes to ensure uniform dispersion, to obtain a two-dimensional transition metal carbide dispersion;

[0086] Adding polyvinyl alcohol and / or polyacrylic acid to the two-dimensional transition metal carbide dispersion to introduce additional functional groups through covalent bonds or other non-covalent interactions;

[0087] Finally, the two-dimensional transition metal carbide derivative (MXene derivative) is obtained through filtration, washing and vacuum drying.

[0088] According to an embodiment of the present invention, the silane coupling agent may be KH550 silane coupling agent.

[0089] According to an embodiment of the present invention, preparing the two-dimensional transition metal carbide derivative (MXene derivative) specifically includes:

[0090] Two-dimensional transition metal carbide powder (MXene powder) was dispersed in deionized water and ultrasonicated for 60 min to form a stable MXene suspension;

[0091] Use a centrifuge (8000 rpm, 10 min) to separate larger particles and impurities, and keep the supernatant;

[0092] Under nitrogen protection, the MXene suspension was transferred to a reaction vessel;

[0093] Add silane coupling agent at a mass ratio of MXene powder to silane coupling agent of 1:0.1;

[0094] Slowly add an appropriate amount of ethanol to adjust the pH value to about 9 to promote the hydrolysis and condensation reaction of the silane coupling agent;

[0095] Stir at room temperature for 24 hours to allow the silane coupling agent to fully modify the MXene surface.

[0096] After centrifugation (8000 rpm, 10 min), washing, and vacuum drying, the preliminarily modified MXene was obtained;

[0097] The initially modified MXene was redispersed in deionized water and treated with ultrasound for 30 min;

[0098] Add an appropriate amount of polyvinyl alcohol (PVA) and / or polyacrylic acid (PAA) and mix them in a mass ratio of MXene to PVA / PAA of 1:0.05.

[0099] Stir in a 60 °C water bath for 4 h to ensure that PVA / PAA is fully combined with the modified MXene.

[0100] After filtration, washing and vacuum drying, the modified two-dimensional transition metal carbide derivative (MXene derivative) with stable dispersibility and multifunctionality is finally obtained.

[0101] According to an embodiment of the present invention, polylactic acid fibers and copper nanowire composite fibers are mixed in a designed ratio, and the basic structure of the fabric is constructed through three-dimensional weaving technology.

[0102] According to an embodiment of the present invention, spraying is performed on the efficient conductive buffer layer to form an organic silicon coating doped with boron nitride nanosheets and zinc oxide quantum dots to obtain the waterproof and antistatic fabric, including:

[0103] The solution of boron nitride nanosheets and zinc oxide quantum dots is uniformly sprayed onto the high-efficiency conductive buffer layer and cured at high temperature;

[0104] Uniformly coating an organic silicon coating on the high-efficiency conductive buffer layer;

[0105] The coated fabric is placed in an oven at 80° C., gradually heated to 120° C., and cured at this temperature to form the waterproof and antistatic fabric.

[0106] According to an embodiment of the present invention, a solution of boron nitride nanosheets and zinc oxide quantum dots is uniformly sprayed onto the high-efficiency conductive buffer layer and cured at 120° C. for 15 minutes.

[0107] According to an embodiment of the present invention, the preparation process of the silicone coating is an existing process, which generally includes:

[0108] In a clean stirring container, first add an appropriate amount of ethanol or isopropanol as solvent;

[0109] Add polydimethylsiloxane (PDMS), silane coupling agent, catalyst, plasticizer, fumed silica and other ingredients in sequence according to the formula ratio;

[0110] Use a high-speed disperser to mix thoroughly to ensure that all ingredients are completely dissolved and evenly distributed. If necessary, add a small amount of leveling agent and defoamer to optimize performance;

[0111] Filter the prepared paint through a filter to remove any possible impurity particles and obtain a fine and smooth silicone paint.

[0112] According to an embodiment of the present invention, it also includes low-temperature plasma treatment: performing low-temperature plasma treatment on the fabric to activate the functional groups on the fiber surface to facilitate the subsequent coating of the functional coating; the low-temperature plasma treatment temperature is set between room temperature and 40°C, and the treatment time is 5-10 minutes.

[0113] The present invention has the following beneficial effects: the present invention achieves the best synergy between the components by carefully selecting and combining the components, making full use of their respective advantages, and through reasonable structural design and preparation process. This synergy not only enables the fabric to have excellent waterproof and antistatic functions, but also pays special attention to the comfortable experience of users when wearing it. In particular, after the introduction of the innovative ingredient of natural rubber microcapsules, the softness and elasticity of the fabric are significantly improved.

[0114] When the temperature is low, the temperature-sensitive phase change material remains soft and breathable, allowing water vapor to pass through; when the temperature rises, the material undergoes a phase change, becoming looser or more porous, increasing breathability, helping to maintain internal temperature stability and improving wearing comfort. When the humidity is low, the moisture-sensitive phase change material is hydrophilic and allows water vapor to pass through; when the humidity rises, the material becomes hydrophobic, preventing liquid water from penetrating and protecting the conductive buffer layer from moisture; when washed, the modified material can maintain its function and provide lasting protection. The temperature-sensitive material and the moisture-sensitive material work together to ensure that the smart responsive conductive buffer layer can effectively control moisture penetration and breathability under different environmental conditions, providing optimal wearing comfort and functionality.

[0115] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0116] Figure 1 The present invention is a flow chart of the preparation method of the embodiment of the present invention. DETAILED DESCRIPTION

[0117] The embodiment of the present application provides a waterproof and antistatic fabric and a preparation method thereof through the present invention.

[0118] Example 1

[0119] Superhydrophobic protective layer: silicone coating (85wt%), boron nitride nanosheets (3wt%), zinc oxide quantum dots (4wt%)

[0120] Highly efficient conductive buffer layer: polylactic acid fiber (70wt%), copper nanowire composite fiber (20wt%), modified MXene derivative (5wt%), temperature-sensitive phase change material (stearic acid: palmitic acid = 2:3, accounting for 9wt% of the total weight)

[0121] Moisture wicking comfort layer: Modal blended material (85wt%), natural rubber microcapsules (10wt%), chitosan microspheres (5wt%), moisture-sensitive material (modified PNIPAM, 2wt% of the total weight)

[0122] Example 2

[0123] Superhydrophobic protective layer: silicone coating (90wt%), boron nitride nanosheets (5wt%), zinc oxide quantum dots (2wt%)

[0124] Highly efficient conductive buffer layer: polylactic acid fiber (75wt%), copper nanowire composite fiber (18wt%), modified MXene derivative (7wt%), temperature-sensitive phase change material (stearic acid: palmitic acid = 2:3, accounting for 12wt% of the total weight)

[0125] Moisture wicking comfort layer: Modal blended material (90wt%), natural rubber microcapsules (5wt%), chitosan microspheres (5wt%), moisture-sensitive material (modified PNIPAM, 2wt% of the total weight)

[0126] Example 3

[0127] Superhydrophobic protective layer: silicone coating (88wt%), boron nitride nanosheets (4wt%), zinc oxide quantum dots (3wt%)

[0128] Highly efficient conductive buffer layer: polylactic acid fiber (72wt%), copper nanowire composite fiber (17wt%), modified MXene derivative (6wt%), temperature-sensitive phase change material (stearic acid: palmitic acid = 2:3, accounting for 7wt% of the total weight)

[0129] Moisture wicking comfort layer: Modal blended material (88wt%), natural rubber microcapsules (7wt%), chitosan microspheres (5wt%), moisture-sensitive material (modified PNIPAM, 2wt% of the total weight)

[0130] Example 4

[0131] Superhydrophobic protective layer: silicone coating (87wt%), boron nitride nanosheets (3wt%), zinc oxide quantum dots (5wt%)

[0132] Highly efficient conductive buffer layer: polylactic acid fiber (73wt%), copper nanowire composite fiber (19wt%), modified MXene derivative (8wt%), temperature-sensitive phase change material (stearic acid: palmitic acid = 2:3, accounting for 9wt% of the total weight)

[0133] Moisture wicking comfort layer: Modal blended material (87wt%), natural rubber microcapsules (8wt%), chitosan microspheres (5wt%), moisture-sensitive material (modified PNIPAM, 4wt% of the total weight)

[0134] Example 5

[0135] Superhydrophobic protective layer: silicone coating (86wt%), boron nitride nanosheets (4wt%), zinc oxide quantum dots (4wt%)

[0136] Highly efficient conductive buffer layer: polylactic acid fiber (74wt%), copper nanowire composite fiber (18wt%), modified MXene derivative (8wt%), temperature-sensitive phase change material (stearic acid: palmitic acid = 2:3, accounting for 9wt% of the total weight)

[0137] Moisture wicking comfort layer: Modal blended material (86wt%), natural rubber microcapsules (9wt%), chitosan microspheres (5wt%), moisture-sensitive material (PNIPAM, 2wt% of the total weight)

[0138] Example 6

[0139] Superhydrophobic protective layer: silicone coating (85wt%), boron nitride nanosheets (5wt%), zinc oxide quantum dots (4wt%)

[0140] Highly efficient conductive buffer layer: polylactic acid fiber (76wt%), copper nanowire composite fiber (17wt%), modified MXene derivative (7wt%), temperature-sensitive phase change material (stearic acid: palmitic acid = 2:3, accounting for 9wt% of the total weight)

[0141] Moisture wicking comfort layer: Modal blended material (89wt%), natural rubber microcapsules (6wt%), chitosan microspheres (5wt%), moisture-sensitive material (modified PNIPAM, 2wt% of the total weight)

[0142] Comparative Example 1

[0143] A conventional fluoropolymer coating and silicone coating are used instead of the silicone coating, and the temperature-sensitive phase change material is not included. The remaining components are the same as those in Example 1.

[0144] Comparative Example 2

[0145] No modified MXene derivative is used, only untreated two-dimensional transition metal carbide is used, no moisture-sensitive material is included, and the remaining ingredients are the same as in Example 1.

[0146] Comparative Example 3

[0147] No two-dimensional transition metal carbide derivative is contained, and other components are the same as those in Example 1.

[0148] Comparative Example 4

[0149] No natural rubber microcapsules were added, and the remaining ingredients were the same as those in Example 1.

[0150] Comparative Example 5

[0151] It only contains a high-efficiency conductive buffer layer and a moisture absorption and perspiration comfort layer, and the other components are the same as those in Example 1.

[0152] Comparative Example 6

[0153] No chitosan microspheres were added, and the remaining ingredients were the same as those in Example 1.

[0154] Experimental example:

[0155] The materials in Examples 1-6 and Comparative Examples 1-6 were tested, including:

[0156] Waterproof performance test:

[0157] The static contact angle measurement method was used to determine the water contact angle on the surface of each fabric.

[0158] Each sample was tested three times and the average value was taken as the final result.

[0159] Antistatic performance test:

[0160] The surface resistivity of each fabric was measured using a standard resistivity tester.

[0161] Each sample was tested three times and the average value was taken as the final result.

[0162] Moisture wicking performance test:

[0163] The air permeability and moisture permeability of each fabric at 25°C and 40°C were tested using the ASTM E96 standard method.

[0164] Each sample was tested three times and the average value was taken as the final result.

[0165] Antibacterial performance test:

[0166] The antibacterial activity of each fabric was tested using the ISO20743:2013 standard.

[0167] Each sample was tested three times and the average value was taken as the final result.

[0168] Comfort rating:

[0169] The softness, elasticity, etc. of the fabric are evaluated by combining subjective evaluation with objective indicators.

[0170] Volunteers were recruited to wear the samples and fill out questionnaires, while skin reactions were recorded.

[0171] All test results were recorded in detail to ensure the accuracy and completeness of the data. Based on the test results, the differences between the embodiments and the comparative examples were compared to analyze the effects of the new materials and new structures on the performance. Based on the data analysis, the superiority of the multifunctional fabric provided by the present invention in various performances was obtained, and the importance of the synergy between the layers and the significant improvement brought about by the application of the new materials were verified. The results are shown in Table 1:

[0172] Table 1. Test results of materials in Examples 1-6 and Comparative Examples 1-6 of the present invention

[0173]

[0174]

[0175] In order to analyze the experimental data in more detail and draw convincing conclusions, we will start with each performance indicator (waterproof, antistatic, moisture absorption and perspiration, antibacterial and comfort), conduct in-depth discussions one by one, and verify the advantages of the new fabric of the present invention through specific data comparison.

[0176] Waterproof performance:

[0177] The contact angles of Examples 1 to 6 are all greater than 150°, indicating that these fabrics have significant superhydrophobic properties.

[0178] After using the traditional silicone coating in Comparative Example 1, the contact angle is about 120°, which is significantly lower than that in the embodiment, indicating that the silicone coating is superior to the traditional fluorine-containing coating in terms of waterproof performance.

[0179] The non-toxic and soft silicone coating not only provides excellent waterproofing, but also solves the health risks that traditional fluorine-containing coatings may bring. Its microporous structure further enhances the super-hydrophobic properties, making it difficult for moisture to penetrate into the fabric, keeping the wearer dry and comfortable.

[0180] Antistatic properties:

[0181] The surface resistivity of Examples 1 to 6 is all lower than 10^6Ω / sq, showing a highly efficient antistatic function.

[0182] When the modified MXene derivative is not used in comparative example 2, the surface resistivity increases significantly to above 10^8Ω / sq; after the commercially available antistatic agent is used in comparative example 5 instead of the copper nanowire composite fiber, the surface resistivity exceeds 10^9Ω / sq.

[0183] The combination of modified MXene derivatives and copper nanowire composite fibers effectively constructs a stable conductive network that can quickly dissipate static electricity and prevent the risk of static electricity accumulation. In contrast, untreated two-dimensional transition metal carbides or commercial antistatic agents cannot achieve the same effect, highlighting the importance of an efficient conductive buffer layer in the present invention.

[0184] Moisture Wicking Performance:

[0185] Air and moisture permeability test:

[0186] The air permeability of Examples 1 to 6 generally exceeds 500m 3 / m 2 ·h, and the moisture permeability reaches 5000g / m 2 ·More than 24h.

[0187] After using ordinary cotton fiber in comparative example 3, the air permeability and moisture permeability were reduced to about 300m 3 / m 2 h and 3000g / m 2 ·24h, showing a significant performance degradation.

[0188] The combination of polylactic acid fiber and modal blended material not only provides good moisture absorption and perspiration performance, but also ensures the lightness and softness of the fabric. Compared with ordinary cotton fibers, this material combination performs better in improving air permeability and moisture permeability, helping to keep the wearer dry.

[0189] Antimicrobial Properties:

[0190] The antibacterial rates of Examples 1 to 6 are all higher than 95%, demonstrating strong antibacterial capabilities.

[0191] In comparative example 6, after chitosan microspheres were not added, the antibacterial rate dropped to about 90%, indicating that the contribution of chitosan microspheres in antibacterial aspects cannot be ignored.

[0192] Chitosan microspheres, as a natural antibacterial ingredient, continuously release antibacterial substances to maintain skin health. Its combination with modal blended materials not only improves the antibacterial properties of the fabric, but also helps to regulate the pH value of the skin and reduce the chance of bacterial growth, thus providing users with a healthier wearing environment.

[0193] Comfort:

[0194] The comfort scores of Examples 1 to 6 are generally high, especially after the addition of natural rubber microcapsules, the softness and elasticity of the fabric are significantly improved.

[0195] In Comparative Example 4, where no natural rubber microcapsules were added, the comfort score decreased, but still remained at a medium level.

[0196] The introduction of natural rubber microcapsules greatly improves the touch and wearing experience of the fabric, and the slow-release mechanism releases trace rubber components, promotes blood circulation, and relieves muscle fatigue. Even without natural rubber microcapsules, other components such as modal blended materials can provide a certain degree of comfort, but the overall performance is not as good as the optimized formula in the embodiment.

[0197] Through detailed analysis of the above experimental data, we can clarify the following points:

[0198] The novel waterproof and antistatic fabric provided by the present invention performs well in multiple key performance indicators such as waterproof, antistatic, moisture absorption and perspiration, and antibacterial, surpassing the single-function fabrics in the prior art.

[0199] The use of non-toxic and soft silicone coating and naturally derived antibacterial ingredients (such as chitosan microspheres) ensures the safety and environmental friendliness of the fabric, in line with modern consumers' pursuit of a healthy life.

[0200] By introducing innovative ingredients such as natural rubber microcapsules, the softness and elasticity of the fabric are significantly improved, providing users with a more comfortable wearing experience.

[0201] The application of modified MXene derivatives not only enhances the stability and functionality of the conductive network but also demonstrates the technological breakthrough of the present invention in the field of materials science.

[0202] In summary, the new waterproof and antistatic multifunctional fabric of the present invention not only has excellent functionality and safety, but also performs well in environmental protection and health. It can provide users with a safer and more comfortable wearing experience and is suitable for a variety of application scenarios, such as industrial protection, outdoor sports, and the need to combat moisture and static interference in daily life.

[0203] Experimental Example 2:

[0204] The fabrics of the above Examples 1-6 and the fabrics of Comparative Examples 1-6 were subjected to moisture permeability control and water washing durability tests (10 washes). The results are shown in Table 2.

[0205] Table 1. Moisture permeability and durability tests of materials in Examples 1-6 of the present invention and Comparative Examples 1-6

[0206]

[0207]

[0208] Temperature-Sensitive Phase Change Material: Significantly increases the breathability of the fabric as the temperature rises, helping to dissipate heat and sweat.

[0209] Moisture-sensitive materials: Modified PNIPAM, in particular, effectively blocks liquid moisture penetration at high humidity levels and maintains its functionality after washing.

[0210] Super-hydrophobic shield: provides additional water-repellent protection, especially in high humidity environments.

[0211] Two-dimensional transition metal carbide derivatives: enhanced conductivity and stability of conductive buffer layers.

[0212] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0213] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A waterproof and antistatic fabric, characterized in that: From the outside to the inside, it includes a super hydrophobic protective layer, a highly efficient conductive buffer layer, and a moisture wicking comfort layer, among which: Super hydrophobic protective layer: comprising an organic silicon coating, the organic silicon coating having a microporous structure, and doped with boron nitride nanosheets and zinc oxide quantum dots; High-efficiency conductive buffer layer: comprising a grid-like layer formed by interweaving polylactic acid fibers and copper nanowire composite fibers, on which a two-dimensional transition metal carbide derivative and a temperature-sensitive phase change material are loaded; Wherein, the two-dimensional transition metal carbide derivative is a two-dimensional transition metal carbide modified by surface treatment with polyvinyl alcohol and / or polyacrylic acid, and the temperature-sensitive phase change material accounts for 5-10wt% of the mass of the high-efficiency conductive buffer layer; The moisture absorption and perspiration comfort layer comprises a modal blended material doped with natural rubber microcapsules and chitosan microspheres, and the moisture absorption and perspiration comfort layer is added with 1-3wt% of moisture-sensitive material by weight of the moisture absorption and perspiration comfort layer.

2. The waterproof and antistatic fabric according to claim 1, characterized in that: The super hydrophobic protective layer comprises: The organosilicon coating accounts for 85-90wt% of the weight of the super hydrophobic protective layer; The boron nitride nanosheets account for 3-5wt% of the weight of the super hydrophobic protective layer; Zinc oxide quantum dots: accounting for 2-4wt% of the weight of the super hydrophobic protective layer.

3. The waterproof and antistatic fabric according to claim 1, characterized in that: The high-efficiency conductive buffer layer comprises: The polylactic acid fiber accounts for 70-80wt% of the weight of the high-efficiency conductive buffer layer; The copper nanowire composite fiber accounts for 15-20wt% of the weight of the high-efficiency conductive buffer layer; The two-dimensional transition metal carbide derivative accounts for 2-5wt% of the weight of the efficient conductive buffer layer; The temperature-sensitive phase change material includes stearic acid and palmitic acid in a mass ratio of 2:

3.

4. The waterproof and antistatic fabric according to claim 1, characterized in that: The moisture wicking comfort layer comprises: The modal blended material accounts for 85-90wt% of the weight of the moisture wicking comfort layer; The natural rubber microcapsules account for 5-10 wt% of the weight of the moisture absorption and perspiration comfort layer; The chitosan microspheres account for 3-5wt% of the weight of the moisture wicking comfort layer; The moisture-sensitive material is modified poly-N-isopropylacrylamide; The modified poly N-isopropylacrylamide is a poly N-isopropylacrylamide into which siloxane groups are introduced by copolymerization or grafting.

5. The method for preparing the waterproof and antistatic fabric according to any one of claims 1 to 4, characterized in that: The following steps are involved: S1: Pre-treating the polylactic acid fiber, the copper nanowire composite fiber and the modal blended material; S2: preparing a moisture wicking comfort layer; S3: treating the polylactic acid fiber and copper nanowire composite fiber using a temperature-sensitive phase change material and a two-dimensional transition metal carbide derivative; S4: weaving a mesh layer of polylactic acid fibers and copper nanowire composite fibers on the moisture absorption and perspiration comfort layer to form a high-efficiency conductive buffer layer loaded with the two-dimensional transition metal carbide derivative and the temperature-sensitive phase change material; S5: introducing a moisture-sensitive material onto the efficient conductive buffer layer; S6: spraying on the efficient conductive buffer layer to form an organic silicon coating doped with boron nitride nanosheets and zinc oxide quantum dots to obtain the waterproof and antistatic fabric.

6. The preparation method according to claim 5, characterized in that: The preparation of the moisture absorption and perspiration comfort layer comprises: Preparation of natural rubber microcapsules; Preparation of chitosan microspheres; The modal blended material is immersed in a fatty acid mixture, wherein the fatty acid mixture includes a mixture formed by dissolving stearic acid and palmitic acid in a mass ratio of 2:3 in an organic solvent, and the modal blended material is freeze-dried; The natural rubber microcapsules and the chitosan microspheres are uniformly dispersed in the modal blended material by dipping or spraying the modal blended material; The modal blended material is heated to 90-100° C. under the condition of 0.8-1 MPa to cure the natural rubber microcapsules; Then the temperature is raised to 120-140° C. to solidify the chitosan microspheres to obtain the moisture absorption and perspiration comfort layer.

7. The preparation method according to claim 6, characterized in that: The preparation of the natural rubber microcapsule mixed solution comprises: Prepare a natural rubber solution, add Span-80 and / or Tween-80, and form a stable emulsion under high-speed stirring; The emulsion is sprayed into an aqueous solution containing glutaraldehyde to form a microcapsule wall through an interfacial polymerization reaction; After washing, centrifugal separation and drying, natural rubber microcapsules with a particle size of 5-10 μm are obtained; The preparation of the chitosan microsphere mixed solution comprises: dissolving chitosan in a weakly acidic solution to form a chitosan solution; Using a dropper, drop the chitosan solution dropwise into the oil phase containing glutaraldehyde; After curing, washing and drying, chitosan microspheres with an average particle size of 3-5 μm are obtained.

8. The preparation method according to claim 5, characterized in that: The introducing of moisture-sensitive material on the efficient conductive buffer layer comprises: Dissolving N-isopropylacrylamide monomer and vinyltrimethoxysilane in deionized water to form a monomer solution with a concentration of 30 wt %, wherein the ratio of the N-isopropylacrylamide monomer to the vinyltrimethoxysilane is 90:10-95:5; Adding ammonium persulfate to the monomer solution, wherein the ammonium persulfate is 0.5-1 wt % of the total weight of the N-isopropylacrylamide monomer and the vinyltrimethoxysilane; Adding a cross-linking agent N,N'-methylenebisacrylamide, wherein the N,N'-methylenebisacrylamide is 0.5-2wt% of the total weight of the N-isopropylacrylamide monomer; Under nitrogen protection, the polymerization reaction is carried out at 60-70°C until a gel-like product is formed; washing and drying the gel-like product to obtain the moisture-sensitive material; The moisture-sensitive material solution is sprayed or dipped onto the high-efficiency conductive buffer layer to ensure uniform coverage and solidification.

9. The preparation method according to claim 5, characterized in that: It also includes preparing the two-dimensional transition metal carbide derivative: A two-dimensional transition metal carbide is selected as a substrate and a silane coupling agent is used to modify its surface; Under nitrogen protection, dispersing the modified two-dimensional transition metal carbide in an ethanol solution, and ultrasonically treating for 30 minutes to ensure uniform dispersion, to obtain a two-dimensional transition metal carbide dispersion; Adding polyvinyl alcohol and / or polyacrylic acid to the two-dimensional transition metal carbide dispersion; Finally, the two-dimensional transition metal carbide derivative is obtained through filtering, washing and vacuum drying.

10. The preparation method according to claim 5, characterized in that: The method of spraying on the efficient conductive buffer layer to form an organic silicon coating doped with boron nitride nanosheets and zinc oxide quantum dots to obtain the waterproof and antistatic fabric comprises: The solution of boron nitride nanosheets and zinc oxide quantum dots is uniformly sprayed onto the high-efficiency conductive buffer layer and cured at high temperature; Uniformly coating an organic silicon coating on the high-efficiency conductive buffer layer; The coated fabric is placed in an oven at 80° C., gradually heated to 120° C., and cured at this temperature to form the waterproof and antistatic fabric.

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