A high-strength and durable heat-resistant Tem fabric, its preparation method and application

Abstract

The present invention belongs to the technical field of fabric coating, and relates to a high-strength durable Therm fabric and its preparation method and application. The high-strength durable Therm fabric includes a Therm fabric layer, a reinforcing nano-coating located above the Therm fabric layer, and an acid and alkali resistant coating located above the reinforcing nano-coating. The reinforcing nano-coating is made by impregnating the Therm fabric layer in a carbon nanotube slurry; the acid and alkali resistant coating is made by coating an organosilicon composite modified polyurethane coating slurry on the upper surface of the reinforcing nano-coating. The present invention innovatively adopts a multi-coating design of a reinforcing nano-coating and an acid and alkali resistant coating. On the basis of improving the strength and durable use performance of the Therm fabric, it can still maintain the high softness of the Therm fabric, ensure wearing comfort, reduce the replacement frequency of users, and reduce the product maintenance cost.

Description

Technical Field

[0001] The present invention belongs to the technical field of fabric coating, and relates to a high-strength durable heat tem fabric, its preparation method and application. Background Art

[0002] Heat tem fabric is an innovative high-tech functional fabric, known for its excellent warmth retention performance and comfortable wearing experience. By introducing heat-generating polymers into the fibers, this fabric is endowed with the ability to absorb and reflect the far-infrared rays of the human body, and then convert them into heat energy, achieving the effect of heat storage and warmth retention. This technology not only enables the heat tem fabric to quickly generate heat upon contact with the skin, but also maintain a stable temperature for a long time, providing lasting warmth.

[0003] Compared with traditional thermal insulation materials, heat tem fabric can achieve efficient warmth retention without relying on heavy fillers, so it is lighter, softer and more comfortable to wear. In addition, it also has good breathability and moisture absorption and sweat discharge performance, which can effectively regulate the body surface temperature and avoid discomfort caused by excessive sweating. Heat tem fabric is widely used in winter warm clothing, such as underwear, base layers and home textile products, providing a new warmth retention solution for users in cold seasons. Its unique heat generation mechanism and comfortable wearing experience make it a leader in the field of modern thermal insulation fabrics.

[0004] Although heat tem fabric is popular for its excellent warmth retention performance and comfortable wearing experience, it also has certain limitations that can affect its performance in some applications and the user experience. To maintain the heat generation and warmth retention performance of heat tem fabric, specific washing and maintenance methods are often required, such as using mild detergents and avoiding high-temperature drying or ironing. These cumbersome requirements bring inconvenience to daily use. If not properly maintained, it may cause the heat generation function of the fabric to weaken or completely fail, thus affecting the wearing experience and product life. Secondly, on the basis of following specific washing and maintenance, after long-term use and multiple washings, the heat generation of heat tem fabric still shows a gradually decreasing trend. This is because during repeated friction and washing, the heat-generating masterbatch may be worn or shed, resulting in a weakened heat generation effect of the fabric. Therefore, the durability problem of heat tem fabric is an important factor affecting the service life of the fabric. In addition, due to the highly soft characteristics of heat tem fabric, its strength is often low, and after multiple wearings and frictions, the fabric is more likely to be worn or damaged, thus affecting its service life and durability.

[0005] In summary, although the Thermum fabric has significant advantages in terms of warmth retention and comfort, there are still some deficiencies in aspects such as washing and maintenance, durability, scope of application, breathability, and environmental sustainability. These limitations need to be comprehensively considered when selecting and using the Thermum fabric to ensure the best user experience and product value. Summary of the Invention

[0006] In view of the above problems existing in the prior art, the present invention provides a high-strength and durable Thermum fabric, its preparation method, and application.

[0007] One object of the present invention is achieved through the following technical solutions:

[0008] A high-strength and durable Thermum fabric, comprising a Thermum fabric layer, a reinforcing nano-coating located above the Thermum fabric layer, and an acid and alkali resistant coating located above the reinforcing nano-coating.

[0009] The reinforcing nano-coating is made by impregnating the Thermum fabric layer in a carbon nanotube slurry; the acid and alkali resistant coating is made by coating an organosilicon composite modified polyurethane coating slurry on the upper surface of the reinforcing nano-coating.

[0010] Preferably, the carbon nanotube slurry is prepared from raw materials including the following parts by weight: 1 - 30 parts of carbon nanotubes, 0.1 - 5 parts of dispersant, 1 - 5 parts of stabilizer, and 10 - 80 parts of polar solvent.

[0011] Preferably, the carbon nanotubes have a diameter of 1 - 20 nm and a length of 1 - 20 μm.

[0012] Preferably, the dispersant includes one or more of polyvinylpyrrolidone, sodium polyacrylate, and polyethylene glycol. The dispersant can evenly disperse the carbon nanotube solid particles in the liquid medium, prevent particle agglomeration, reduce the surface tension of the liquid medium, improve the wettability of the solid particles, and make the particles easier to be surrounded and dispersed by the liquid. In the present invention, a polymer dispersant is used to form a protective film by adsorption on the particle surface, and provide steric hindrance through the long-chain structure to prevent direct contact and aggregation between particles.

[0013] Preferably, the stabilizer includes one or more of polyoxyethylene ether, polyvinyl alcohol, and polyacrylic acid. The main function of the stabilizer is to maintain the long-term stability of the dispersion system, prevent particle re-aggregation or precipitation. The stabilizer can slow down and prevent the sedimentation of particles in the liquid, maintain the uniformity of the system, and prevent the occurrence of flocculation phenomena during storage or use of the particles.

[0014] Preferably, the polar solvent includes one or more of deionized water, ethanol, isopropanol, N,N-dimethylformamide, and N-methylpyrrolidone.

[0015] Preferably, the method for preparing the carbon nanotube slurry comprises the following steps: adding carbon nanotubes into a polar solvent, then adding a dispersant to disperse evenly, and then adding a stabilizer and continuing to stir evenly to obtain the carbon nanotube slurry.

[0016] In the method for preparing the carbon nanotube slurry, preferably, ultrasonic treatment is adopted for dispersion, the ultrasonic dispersion frequency is 10 - 60 kHz, the ultrasonic dispersion power is 50 - 500 W, and the ultrasonic dispersion time is 10 - 60 min.

[0017] Preferably, the organosilicon composite modified polyurethane coating slurry is prepared from the following raw materials in parts by weight: 10 - 50 parts of polyurethane monomer, 10 - 20 parts of methacrylate, 10 - 30 parts of organosilicon monomer, 0.1 - 5 parts of catalyst, 1 - 5 parts of surfactant, and 20 - 50 parts of organic solvent.

[0018] Preferably, the polyurethane monomer adopts a composition of isocyanate and polyol.

[0019] Preferably, the isocyanate includes one or more of toluene diisocyanate (TDI), diphenylmethane diisocyanate (MDI), hexamethylene diisocyanate (HDI), isophorone diisocyanate (IPDI), and lysine diisocyanate (LDI).

[0020] Preferably, the polyol includes one or more of polypropylene glycol, polytetrahydrofuran glycol, polyethylene glycol, ethylene glycol adipate, butylene glycol adipate, polycarbonate diol, and polycaprolactone diol.

[0021] Preferably, the mass ratio of the isocyanate to the polyol is (1 - 5):(1 - 10).

[0022] Preferably, the methacrylate adopts one or two of methyl methacrylate and butyl methacrylate.

[0023] In the present invention, methacrylate is introduced for modification during the process of forming polyurethane by polycondensation of isocyanate and polyol. The double bond in methacrylate can undergo a Michael addition reaction with isocyanate (-NCO), the double bond of methacrylate opens, and a new carbon - nitrogen bond is formed with the isocyanate group; secondly, the ester group (-COO-) in methacrylate can undergo a transesterification reaction with the hydroxyl group (-OH) in polyol to generate a new ester and alcohol. During the above reaction process, methacrylate, isocyanate, and polyol jointly participate in the copolymerization reaction to form a modified polyurethane material with multiple functional groups, which can provide better strength performance and durability when applied to the coating of Therm fabric.

[0024] Preferably, the silicone monomer includes one or more of amino silicone oil, epoxy silicone oil, hydroxyl silicone oil, carboxyl silicone oil, polydimethylsiloxane, and hydroxyl-terminated polydimethylsiloxane.

[0025] Silicone has good chemical stability and can be well compatible with modified polyurethane. Introducing silicone into the polyurethane system can form a stable cross-linked network structure in the fabric coating. Secondly, the presence of silicone molecular chain segments helps to reduce the surface free energy of the entire polymer network, thereby improving the fabric's repelling ability to liquids such as water, oil, and sweat, and enhancing the corrosion and acid-base resistance. At the same time, since the silicone chain segments are relatively soft and have good elasticity themselves, when they are introduced into the modified polyurethane, they can provide a certain strength while maintaining the overall flexibility and ductility of the Therm fabric itself.

[0026] Preferably, the catalyst includes: 50 - 70 wt% of base catalyst and 30 - 50 wt% of organometallic catalyst.

[0027] Preferably, the base catalyst includes one or more of sodium ethoxide, sodium hydride, sodium amide, dimethylcyclohexylamine, and triethylenediamine.

[0028] Preferably, the organometallic catalyst includes one or more of dibutyltin dilaurate, stannous octoate, and zinc diacetate.

[0029] Preferably, the surfactant includes one or more of nonionic surfactant, anionic surfactant, and cationic surfactant.

[0030] More preferably, the surfactant includes one or more of polyoxyethylene ether, polyoxyethylene alkylphenol ether, polyoxyethylene fatty alcohol ether, sodium dodecyl sulfate, sodium dodecylbenzenesulfonate, and cetyltrimethylammonium bromide.

[0031] Preferably, the organic solvent includes one or more of ethyl acetate, toluene, xylene, n-heptane, cyclohexane, propylene glycol methyl ether acetate, dipropylene glycol methyl ether, and ethylene glycol butyl ether.

[0032] Preferably, the preparation method of the silicone composite modified polyurethane coating slurry includes the following steps: adding a composition of polyurethane monomers, methacrylate, and a catalyst into an organic solvent and stirring, obtaining modified polyurethane through copolymerization reaction; then adding a silicone monomer and continuing to stir for cross-linking reaction; and then adding a surfactant and stirring evenly to obtain the silicone composite modified polyurethane coating slurry.

[0033] In the preparation method of the silicone composite modified polyurethane coating slurry, preferably, the copolymerization reaction temperature is 50 - 90 °C and the reaction time is 1 - 5 h.

[0034] In the preparation method of the silicone composite modified polyurethane coating paste, preferably, the cross-linking reaction temperature is 30 - 60 °C, and the reaction time is 1 - 5 h.

[0035] In the preparation method of the silicone composite modified polyurethane coating paste, preferably, a surfactant is added and stirred for 10 - 30 min.

[0036] Another object of the present invention is achieved by the following technical solution:

[0037] A preparation method of a high-strength and durable Therm fabric, the preparation method comprising the following steps: impregnating a Therm fabric layer in a carbon nanotube paste, and drying to form an acid and alkali resistant coating; then coating the silicone composite modified polyurethane coating paste on the acid and alkali resistant coating, and drying and curing to form a reinforcing nano-coating, thereby obtaining the high-strength and durable Therm fabric.

[0038] Preferably, the drying temperature of the reinforcing nano-coating is 30 - 80 °C, and the drying time is 1 - 50 h.

[0039] Preferably, the drying temperature of the acid and alkali resistant coating is 30 - 80 °C, the drying time is 1 - 20 h, the curing temperature is 80 - 120 °C, and the curing time is 10 - 60 min.

[0040] Preferably, the thickness of the reinforcing nano-coating is 0.01 - 0.1 mm.

[0041] Preferably, the thickness of the acid and alkali resistant coating is 0.1 - 1 mm.

[0042] Another object of the present invention is achieved by the following technical solution:

[0043] An application of a high-strength and durable Therm fabric in the preparation of clothing and household items.

[0044] Compared with the prior art, the present invention has the following beneficial effects:

[0045] 1. A high-strength and durable Thermotex fabric provided by the present invention forms a reinforcing nano-coating by impregnating a carbon nanotube slurry on the Thermotex fabric layer, significantly improving the wear resistance of the fabric. Carbon nanotubes have extremely high strength and hardness, and can effectively resist the wear caused by multiple wearings and frictions; a silicone composite modified polyurethane coating slurry is coated on the reinforcing nano-coating to form an acid and alkali resistant coating. This coating has excellent chemical corrosion resistance, can protect the fabric from the erosion of acid and alkali environments, effectively simplifies the user's usage requirements, and extends the service life; the combination of carbon nanotubes and the silicone modified polycondensed polyurethane coating not only improves the wear resistance and acid and alkali resistance of the fabric, but also enhances its mechanical strength and tear resistance, making the fabric more durable.

[0046] 2. A high-strength and durable Thermotex fabric provided by the present invention innovatively adopts a multi-coating design of a reinforcing nano-coating and an acid and alkali resistant coating. Through the selection of coating materials and coating parameter settings, while improving the strength performance of the Thermotex fabric, it can still maintain the high softness of the Thermotex fabric, ensuring wearing comfort. Due to the multiple protection effects of the coating, the fabric is not easily damaged during use, reducing the user's replacement frequency and lowering the maintenance cost.

[0047] 3. A preparation method of a high-strength and durable Thermotex fabric provided by the present invention adopts a unique process of first impregnating a reinforcing nano-coating and then coating an acid and alkali resistant coating. This method not only simplifies the production process, but also significantly improves the comprehensive performance of the fabric. This method only needs to complete the forming of the entire coating system through one curing process. During the curing process of the silicone modified polycondensed polyurethane coating, the modified polyurethane component in the coating can further assist in fixing the carbon nanotubes in the reinforcing nano-coating, thereby forming a tightly combined whole. This integrated curing process not only simplifies the production process, but also ensures good bonding between the coatings, enhancing the overall durability and stability. The preparation method is simple and easy to implement, the operation steps are clear, easy to control, and suitable for large-scale industrial production. Detailed Embodiments

[0048] The following combines specific embodiments to further describe and explain the technical solutions of the present invention. It should be understood that the specific embodiments described here are only used to illustrate the present invention, rather than to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of this application.

[0049] Example 1

[0050] The carbon nanotube slurry of this embodiment is prepared from the following raw materials in parts by weight: 10 parts of carbon nanotubes (XF Nano, diameter 1 - 2 nm, length 1 - 3 μm), 2 parts of polyvinylpyrrolidone, 3 parts of polyoxyethylene ether, 50 parts of deionized water, and 20 parts of ethanol.

[0051] The preparation method of the carbon nanotube slurry of this embodiment includes the following steps: Add deionized water and ethanol into a reaction vessel, and stir evenly at room temperature to form a mixed solvent; Slowly add carbon nanotubes into the mixed solvent, and at the same time turn on an ultrasonic disperser with an ultrasonic dispersion frequency of 40 kHz and a power of 300 W, and ultrasonically disperse for 30 min to ensure that the carbon nanotubes are evenly dispersed in the solvent and avoid agglomeration; Add polyvinylpyrrolidone and continue stirring for 10 min to ensure that the dispersant is adsorbed on the surface of the carbon nanotubes to form a protective film to prevent direct contact and aggregation between particles; Add polyoxyethylene ether and continue stirring for 10 min to ensure that the stabilizer is evenly distributed in the solution, improve the long-term stability of the dispersion system, and prevent the carbon nanotubes from re-aggregating or settling; Finally, obtain the carbon nanotube slurry and store it for standby in a dry and light-proof environment.

[0052] The organosilicon composite modified polyurethane coating slurry of this embodiment is prepared from the following raw materials in parts by weight: 15 parts of diphenylmethane diisocyanate, 22 parts of polyoxypropylene glycol, 13 parts of methyl methacrylate, 15 parts of amino silicone oil, 2 parts of sodium ethoxide, 1 part of dibutyltin dilaurate, 2 parts of sodium dodecyl sulfate, 30 parts of ethyl acetate, and 20 parts of toluene.

[0053] The preparation method of the organosilicon composite modified polyurethane coating slurry of this embodiment includes the following steps: Add diphenylmethane diisocyanate, polyoxypropylene glycol, and methyl methacrylate into a reaction vessel, and add ethyl acetate and toluene, and stir evenly at room temperature using a stirrer; Add sodium ethoxide and dibutyltin dilaurate and heat up to 70 °C, and continuously stir for 2 h to carry out a copolymerization reaction to obtain modified polyurethane; After adding amino silicone oil, continuously stir at 50 °C for 2 h to carry out a cross-linking reaction to enable the organosilicon monomer to fully participate in the reaction and form a stable cross-linked network; Add sodium dodecyl sulfate and continue stirring for 20 min to obtain the organosilicon composite modified polyurethane coating slurry.

[0054] The preparation method of the high-strength and durable Therm fabric in this embodiment includes the following steps: Immerse the Therm fabric layer in the carbon nanotube slurry, slowly lift the fabric, and after no slurry drips, place the immersed fabric in a ventilated environment and dry it at 60°C for 24 hours to form a reinforced nano-coating with a thickness of 0.05 mm; Coat the upper surface of the reinforced nano-coating with the silicone composite modified polyurethane coating slurry, control the coating thickness to be 0.3 mm, place the coated fabric in a ventilated environment and dry it at 60°C for 12 hours; Finally, put the fabric into an oven and cure it at 100°C for 30 minutes to form an acid and alkali resistant coating, thus obtaining the high-strength and durable Therm fabric.

[0055] Example 2

[0056] The difference between this embodiment and Example 1 is that the carbon nanotube slurry is prepared from the following raw materials in parts by weight: 15 parts of carbon nanotubes (Xianfeng Nano, diameter 1 - 2 nm, length 1 - 3 μm), 3 parts of sodium polyacrylate, 4 parts of polyvinyl alcohol, 40 parts of deionized water, and 30 parts of isopropanol. The rest is the same as in Example 1.

[0057] Example 3

[0058] The difference between this embodiment and Example 1 is that the silicone composite modified polyurethane coating slurry is prepared from the following raw materials in parts by weight: 12 parts of toluene diisocyanate, 25 parts of polycarbonate diol, 15 parts of butyl methacrylate, 17 parts of carboxyl silicone oil, 1.5 parts of dimethylcyclohexylamine, 1 part of stannous octoate, 2 parts of polyoxyethylene ether, 30 parts of ethyl acetate, and 20 parts of toluene. The rest is the same as in Example 1.

[0059] Example 4

[0060] The difference between this embodiment and Example 1 is that the preparation method of the high-strength and durable Therm fabric includes the following steps: Immerse the Therm fabric layer in the carbon nanotube slurry, slowly lift the fabric, and after no slurry drips, place the immersed fabric in a ventilated environment and dry it at 60°C for 24 hours to form a reinforced nano-coating with a thickness of 0.1 mm; Coat the upper surface of the reinforced nano-coating with the silicone composite modified polyurethane coating slurry, control the coating thickness to be 0.5 mm, place the coated fabric in a ventilated environment and dry it at 60°C for 12 hours; Finally, put the fabric into an oven and cure it at 100°C for 30 minutes to form an acid and alkali resistant coating, thus obtaining the high-strength and durable Therm fabric. The rest is the same as in Example 1.

[0061] Comparative Example 1

[0062] The difference between this comparative example and Example 1 is that the modified polyurethane coating slurry without silicone composite is used in the acid and alkali resistant coating, and the rest is the same as in Example 1.

[0063] This comparative example's modified polyurethane coating slurry is prepared from raw materials including the following parts by weight: 15 parts of diphenylmethane diisocyanate, 22 parts of polypropylene glycol, 13 parts of methyl methacrylate, 2 parts of sodium ethoxide, 1 part of dibutyltin dilaurate, 2 parts of sodium dodecyl sulfate, 30 parts of ethyl acetate, and 20 parts of toluene.

[0064] The preparation method of this comparative example's modified polyurethane coating slurry includes the following steps: Add diphenylmethane diisocyanate, polypropylene glycol, and methyl methacrylate into a reaction vessel, and add ethyl acetate and toluene. Use a stirrer to stir evenly at room temperature; add sodium ethoxide and dibutyltin dilaurate and heat up to 70°C, continuously stir for 2 h to carry out copolymerization reaction to obtain modified polyurethane; add sodium dodecyl sulfate and continue to stir for 20 min to obtain the modified polyurethane coating slurry.

[0065] Comparative Example 2

[0066] The difference between this comparative example and Example 1 is that an organosilicon composite modified isocyanate coating slurry is used in the acid and alkali resistant coating, and the rest is the same as Example 1.

[0067] This comparative example's organosilicon composite modified isocyanate coating slurry is prepared from raw materials including the following parts by weight: 15 parts of diphenylmethane diisocyanate, 13 parts of methyl methacrylate, 15 parts of amino silicone oil, 2 parts of sodium ethoxide, 1 part of dibutyltin dilaurate, 2 parts of sodium dodecyl sulfate, 30 parts of ethyl acetate, and 20 parts of toluene.

[0068] The preparation method of this comparative example's organosilicon modified isocyanate coating slurry includes the following steps: Add diphenylmethane diisocyanate and methyl methacrylate into a reaction vessel, and add ethyl acetate and toluene. Use a stirrer to stir evenly at room temperature; add sodium ethoxide and dibutyltin dilaurate and heat up to 70°C, continuously stir for 2 h to obtain modified isocyanate; after adding amino silicone oil, continuously stir at 50°C for 2 h to carry out crosslinking reaction; add sodium dodecyl sulfate and continue to stir for 20 min to obtain the organosilicon composite modified isocyanate coating slurry.

[0069] Comparative Example 3

[0070] The difference between this comparative example and Example 1 is that an organosilicon composite modified polyol coating slurry is used in the acid and alkali resistant coating, and the rest is the same as Example 1.

[0071] This comparative example's organosilicon composite modified polyol coating slurry is prepared from raw materials including the following parts by weight: 22 parts of polypropylene glycol, 13 parts of methyl methacrylate, 15 parts of amino silicone oil, 2 parts of sodium ethoxide, 1 part of dibutyltin dilaurate, 2 parts of sodium dodecyl sulfate, 30 parts of ethyl acetate, and 20 parts of toluene.

[0072] The preparation method of the silicone composite modified polyol coating slurry in this comparative example includes the following steps: Add polyoxypropylene glycol and methyl methacrylate into a reaction vessel, and add ethyl acetate and toluene. Stir evenly at room temperature using a stirrer; Add sodium ethoxide and dibutyltin dilaurate and heat up to 70 °C, and continuously stir for 2 h to obtain modified polyol; After adding amino silicone oil, continuously stir at 50 °C for 2 h for cross-linking reaction; Add sodium dodecyl sulfate and continue stirring for 20 min to obtain the silicone composite modified polyol coating slurry.

[0073] Comparative Example 4

[0074] The difference between this comparative example and Example 1 is that an organic silicone composite polyurethane coating slurry is used in the acid and alkali resistant coating, and the rest is the same as in Example 1.

[0075] The organic silicone composite polyurethane coating slurry in this comparative example is prepared from the following raw materials by weight: 15 parts of diphenylmethane diisocyanate, 22 parts of polyoxypropylene glycol, 15 parts of amino silicone oil, 2 parts of sodium ethoxide, 1 part of dibutyltin dilaurate, 2 parts of sodium dodecyl sulfate, 30 parts of ethyl acetate, and 20 parts of toluene.

[0076] The preparation method of the organic silicone composite polyurethane coating slurry in this comparative example includes the following steps: Add diphenylmethane diisocyanate and polyoxypropylene glycol into a reaction vessel, and add ethyl acetate and toluene. Stir evenly at room temperature using a stirrer; Add sodium ethoxide and dibutyltin dilaurate and heat up to 70 °C, and continuously stir for 2 h for copolymerization reaction to obtain polyurethane; After adding amino silicone oil, continuously stir at 50 °C for 2 h for cross-linking reaction; Add sodium dodecyl sulfate and continue stirring for 20 min to obtain the organic silicone composite polyurethane coating slurry.

[0077] Comparative Example 5

[0078] The difference between this comparative example and Example 1 is that in the preparation method of the Therm fabric, the acid and alkali resistant coating is coated first, and then the reinforcing nano-coating is impregnated.

[0079] The raw materials and preparation methods of the acid and alkali resistant coating and the reinforcing nano-coating in this comparative example are the same as those in Example 1.

[0080] The preparation method of the heat-resistant fabric in this comparative example includes the following steps: Coating the upper surface of the heat-resistant fabric layer with an organosilicon composite modified polyurethane coating slurry, controlling the coating thickness to be 0.3 mm, placing the coated fabric in a ventilated environment, drying it at 60 °C for 12 hours, putting the fabric into an oven, and curing it at 100 °C for 30 min to form an acid and alkali resistant coating; Immersing the fabric in a carbon nanotube slurry, slowly lifting the fabric until no slurry drips, and then placing the immersed fabric in a ventilated environment, drying it at 60 °C for 24 h to form a reinforced nano-coating with a thickness of 0.05 mm, thus obtaining the heat-resistant fabric.

[0081] Comparative Example 6

[0082] The difference between this comparative example and Example 1 is that in the preparation method of the heat-resistant fabric, only the reinforced nano-coating is immersed.

[0083] The raw materials and preparation method of the reinforced nano-coating in this comparative example are the same as those in Example 1.

[0084] The preparation method of the heat-resistant fabric in this comparative example includes the following steps: Immersing the heat-resistant fabric layer in a carbon nanotube slurry, slowly lifting the fabric until no slurry drips, and then placing the immersed fabric in a ventilated environment, drying it at 60 °C for 24 h to form a reinforced nano-coating with a thickness of 0.05 mm, thus obtaining the heat-resistant fabric.

[0085] Comparative Example 7

[0086] The difference between this comparative example and Example 1 is that in the preparation method of the heat-resistant fabric, only the acid and alkali resistant coating is coated.

[0087] The raw materials and preparation method of the acid and alkali resistant coating in this comparative example are the same as those in Example 1.

[0088] The preparation method of the heat-resistant fabric in this comparative example includes the following steps: Coating the upper surface of the heat-resistant fabric layer with an organosilicon composite modified polyurethane coating slurry, controlling the coating thickness to be 0.3 mm, placing the coated fabric in a ventilated environment, drying it at 60 °C for 12 hours, putting the fabric into an oven, and curing it at 100 °C for 30 min to form an acid and alkali resistant coating, thus obtaining the heat-resistant fabric.

[0089] Comparative Example 8

[0090] This comparative example uses a conventional uncoated heat-resistant fabric for subsequent relevant performance tests.

[0091] Carry out relevant performance tests on the heat-resistant fabrics of the above examples and comparative examples, and the specific test methods are as follows:

[0092] 1. Detect the initial breaking strength of the heat-resistant fabric according to GB / T3923.1-2013;

[0093] 2. Detect the breaking strength of the Thermum fabric after 30 times of washing according to GB / T 3923.1-2013, and calculate the breaking strength attenuation rate.

[0094] 3. Acid treatment of the fabric: Cut the fabric into specimens of 40 mm × 100 mm, put the specimens into the acid solution with a bath ratio of 50:1 (each liter of the acid solution contains: 0.5 g of L-histidine hydrochloride monohydrate, 5 g of sodium chloride, 2.2 g of sodium dihydrogen phosphate dihydrate, and adjust the pH of the test solution to 5.5 with 0.1 mol / L HCl) to make them completely wet, then place them at room temperature for 30 min, press and stir the specimens to ensure that the acid solution can penetrate well and evenly; take out the specimens, pour off the residual liquid, use two glass rods to clamp off the excess acid solution on the specimens, clamp the specimens between two glass plates to make the specimens under a pressure of 12.5 kPa and fix them, put the fixed specimens into an incubator and treat them at 37 °C for 4 h; then hang them to dry at 60 °C for later use.

[0095] Alkali treatment of the fabric: Cut the fabric into specimens of 40 mm × 100 mm, put the specimens into the alkali solution with a bath ratio of 50:1 (each liter of the alkali solution contains: 0.5 g of L-histidine hydrochloride monohydrate, 5 g of sodium chloride, 5 g of disodium hydrogen phosphate dodecahydrate, and adjust the pH of the test solution to 8.0 with 0.1 mol / L NaOH) to make them completely wet, then place them at room temperature for 30 min, press and stir the specimens to ensure that the alkali solution can penetrate well and evenly; take out the specimens, pour off the residual liquid, use two glass rods to clamp off the excess alkali solution on the specimens, clamp the specimens between two glass plates to make the specimens under a pressure of 12.5 kPa and fix them, put the fixed specimens into an incubator and treat them at 37 °C for 4 h; then hang them to dry at 60 °C for later use.

[0096] Then detect the breaking strength of the Thermum fabric after acid and alkali treatments according to GB / T 3923.1-2013, and calculate the breaking strength attenuation rate.

[0097] The specific test results are shown in Table 1.

[0098] Table 1 Performance test results of the examples and comparative examples

[0099] .

[0100] As shown in Table 1, it can be seen from Examples 1 to 4 that the high-strength and durable heat tem fabric prepared by using the technical solution of the present invention has excellent strength performance. After 30 times of washing and acid-base treatment, the breaking strength attenuation rate can be stably within 2%, effectively increasing the durability of the heat tem fabric in daily cleaning and long-term wearing. It can be seen from Comparative Examples 1 to 4 that the acid-base resistant coating prepared without using the raw materials within the scope of the technical solution of the present invention cannot have a good cross-linked network and cannot form a modified polyurethane material with multiple functional groups. After being applied to the heat tem fabric to form a coating, a large strength attenuation occurs after washing and acid-base treatment. It can be seen from Comparative Examples 5 to 8 that without using the enhanced nano-coating and / or acid-base resistant coating of the present invention and changing the coating order, the heat tem fabric will have a large strength attenuation after washing and acid-base treatment, and the long-term use performance of the product cannot be guaranteed.

[0101] All aspects, embodiments, and features of the present invention should be considered illustrative in all respects and not limiting to the present invention. The scope of the present invention is only defined by the claims. Without departing from the spirit and scope of the claimed invention, those skilled in the art will appreciate other embodiments, modifications, and uses.

[0102] In the preparation method of the present invention, the order of each step is not limited to the listed order. For those of ordinary skill in the art, without creative efforts, the sequential changes of each step are also within the protection scope of the present invention. In addition, two or more steps or actions can be carried out simultaneously.

[0103] Finally, it should be noted that the specific embodiments described herein are only examples of the present invention and do not limit the implementation mode of the present invention. Those skilled in the technical field of the present invention can make various modifications or supplements to the described specific embodiments or use similar methods to replace them. It is not necessary and impossible to list all the implementation modes here. And these obvious changes or variations derived from the essential spirit of the present invention still belong to the protection scope of the present invention. Interpreting them as any additional limitation is contrary to the spirit of the present invention.

Claims

1. A high-strength and durable thermal fabric, characterized in that: The high-strength and durable hot temu fabric comprises a hot temu fabric layer, a reinforced nano coating located above the hot temu fabric layer, and an acid- and alkali-resistant coating located above the reinforced nano coating; The enhanced nano coating is made of a heat-resistant surface layer immersed in a carbon nanotube slurry; The acid-base resistant coating is made by coating an organic silicon composite modified polyurethane coating slurry on the upper surface of the enhanced nano coating; The organic silicon composite modified polyurethane coating slurry is prepared from the following raw materials in parts by weight: 10-50 parts of polyurethane monomer, 10-20 parts of methacrylate, 10-30 parts of organic silicon monomer, 0.1-5 parts of catalyst, 1-5 parts of surfactant, and 20-50 parts of organic solvent; The polyurethane monomer adopts a composition of isocyanate and polyol; the isocyanate includes one or more of toluene diisocyanate, diphenylmethane diisocyanate, hexamethylene diisocyanate, isophorone diisocyanate, and lysine diisocyanate; the polyol includes one or more of polyoxypropylene diol, polytetramethylene glycol, polyethylene glycol adipate, polybutylene glycol adipate, polycarbonate diol, and polycaprolactone diol; the mass ratio of the isocyanate to the polyol is (1-5): (1-10); The organic silicon monomer includes one or more of amino silicone oil, epoxy silicone oil, hydroxy silicone oil, carboxyl silicone oil, polydimethylsiloxane, and terminal hydroxyl polydimethylsiloxane.

2. The high-strength and durable thermal fabric according to claim 1, characterized in that: The carbon nanotube slurry is prepared from the following raw materials in parts by weight: 1-30 parts of carbon nanotubes, 0.1-5 parts of dispersant, 1-5 parts of stabilizer, and 10-80 parts of polar solvent.

3. The high-strength and durable thermal temu fabric according to claim 2, characterized in that: The carbon nanotubes have a diameter of 1-20 nm and a length of 1-20 μm; The dispersant includes one or more of polyvinyl pyrrolidone, sodium polyacrylate, and polyethylene glycol; The stabilizer includes one or more of polyoxyethylene ether, polyvinyl alcohol, and polyacrylic acid; The polar solvent includes one or more of deionized water, ethanol, isopropanol, N,N-dimethylformamide, and N-methylpyrrolidone.

4. The high-strength and durable thermal temu fabric according to claim 2, characterized in that: The preparation method of the carbon nanotube slurry comprises the following steps: adding carbon nanotubes into a polar solvent, then adding a dispersant to disperse them uniformly, and then adding a stabilizer to continue stirring to obtain the carbon nanotube slurry.

5. The high-strength and durable thermal temu fabric according to claim 1, characterized in that: The methacrylate is one or both of methyl methacrylate and butyl methacrylate; The catalyst comprises: 50-70 wt% of a base catalyst and 30-50 wt% of an organic metal catalyst; The surfactant includes one or more of a nonionic surfactant, an anionic surfactant, and a cationic surfactant; The organic solvent includes one or more of ethyl acetate, toluene, xylene, n-heptane, cyclohexane, propylene glycol methyl ether acetate, dipropylene glycol methyl ether, and ethylene glycol butyl ether.

6. The high-strength and durable thermal temu fabric according to claim 1, characterized in that: The preparation method of the organosilicon composite modified polyurethane coating slurry comprises the following steps: adding polyurethane monomer, methacrylate and catalyst into an organic solvent and stirring them to obtain modified polyurethane through copolymerization reaction; then adding organosilicon monomer and continuing stirring to carry out cross-linking reaction; then adding surfactant and stirring evenly to obtain the organosilicon composite modified polyurethane coating slurry; the copolymerization reaction temperature is 50-90°C and the reaction time is 1-5h; the cross-linking reaction temperature is 30-60°C and the reaction time is 1-5h.

7. A method for preparing a high-strength and durable thermal temu fabric as claimed in any one of claims 1 to 6, characterized in that: The preparation method comprises the following steps: immersing the heat-resistant fabric layer in carbon nanotube slurry, and forming a reinforced nano coating after drying; then applying the organic silicon composite modified polyurethane coating slurry on the reinforced nano coating, and forming an acid- and alkali-resistant coating after drying and curing to obtain the high-strength and durable heat-resistant fabric.

8. The preparation method according to claim 7, characterized in that: The drying temperature of the enhanced nano coating is 30-80°C and the drying time is 1-50h; The acid- and alkali-resistant coating has a drying temperature of 30 to 80° C., a drying time of 1 to 20 hours, a curing temperature of 80 to 120° C., and a curing time of 10 to 60 minutes; The thickness of the enhanced nano coating is 0.01-0.1 mm; The thickness of the acid and alkali resistant coating is 0.1-1 mm.

9. Use of a high-strength and durable thermo-tem fabric as claimed in any one of claims 1 to 6 in the preparation of clothing and household items.