High-strength non-deformable polyester knitted fabric and preparation method thereof

Abstract

The invention relates to a high-strength non-deformable polyester knitted fabric and a preparation method thereof, and relates to the technical field of fabrics. The high-strength polyester knitted fabric not prone to deformation comprises a fabric body, the fabric body is formed by weaving polyester fibers, the surface of the fabric body is covered with an anti-deformation layer, the anti-deformation layer is obtained by coating the surface of the fabric body with an anti-deformation agent, and the anti-deformation agent comprises modified epoxy resin; the preparation method of the modified epoxy resin comprises the following steps: mixing epoxy resin, anacardol benzoxazine and a curing agent, uniformly stirring, heating and curing to obtain the modified epoxy resin, the polyester knitted fabric has the effect of improving the wrinkle resistance of the polyester knitted fabric.

Description

Technical Field

[0001] The present application relates to the technical field of fabrics, and in particular to a high-strength, non-deformable polyester knitted fabric and a preparation method thereof. Background Art

[0002] Polyester fiber is widely used in various textiles due to its wear resistance, easy washing and quick drying. Traditional polyester knitted fabrics are comfortable to wear and have good warmth retention properties, and are often used as clothing.

[0003] However, traditional polyester knitted fabrics are prone to deformation under frequent stretching and external forces, thus forming wrinkles, which in turn affects the appearance and practicality of clothing made of polyester knitted fabrics. Summary of the invention

[0004] In order to improve the wrinkle resistance of polyester knitted fabrics, the present application provides a high-strength, non-deformable polyester knitted fabric and a preparation method thereof.

[0005] In the first aspect, the present application provides a high-strength, non-deformable polyester knitted fabric, which adopts the following technical solution: a high-strength, non-deformable polyester knitted fabric, comprising a fabric body, the fabric body is woven with polyester fibers, the surface of the fabric body is covered with an anti-deformation layer, the anti-deformation layer is obtained by coating an anti-deformation agent on the surface of the fabric body, and the anti-deformation agent includes a modified epoxy resin; The preparation method of the modified epoxy resin comprises the following steps: The epoxy resin, the cardanol-based benzoxazine and the curing agent are mixed, stirred evenly, and heated and cured to obtain the modified epoxy resin.

[0006] By adopting the above technical solution, the anti-deformation agent produced by modified epoxy resin is coated on the surface of the fabric body, so that the polyester knitted fabric has the characteristics of high strength performance and not easy to deform.

[0007] Polyester fiber itself has high strength, so the fabric formed by weaving polyester fiber has the advantage of high strength.

[0008] The epoxy resin in the modified epoxy resin itself has a cross-linking function and can form a network structure on the polyester fiber; the cardanol group in the cardanol-based benzoxazine contains a benzene ring, has good rigidity, and contains an unsaturated double bond carbon 15 straight chain, which can also be used as an active site to initiate a cross-linking reaction, thereby prompting the cardanol-based benzoxazine and the epoxy resin to form a cross-linking network, effectively improving the stability of the fabric, making the fabric less likely to deform, and thereby improving the wrinkle resistance of the fabric.

[0009] In addition, epoxy resin has poor impact resistance due to its highly cross-linked structure, while the cardanol group in cardanol-based benzoxazine contains long-chain alkane side groups, which have good toughness and can improve the impact resistance of epoxy resin, thereby improving the stability of the fabric.

[0010] In addition, the cardanol-based benzoxazine has the effect of promoting the thermal degradation and carbonization of epoxy resin, thereby forming a protective carbon layer, thereby improving the flame retardancy of the fabric.

[0011] Preferably, boron-doped graphene is further added during the preparation of the modified epoxy resin, and the preparation method of the modified epoxy resin comprises the following steps: Boron-doped graphene is added to acetone and subjected to ultrasonic treatment to obtain a suspension; the suspension, epoxy resin and cardanol-based benzoxazine are mixed and heated, and after the acetone is completely removed, a curing agent is added, the mixture is stirred evenly, and the mixture is heated and cured to obtain a modified epoxy resin.

[0012] By adopting the above technical solution, boron-doped graphene has the effect of inhibiting the escape of volatile combustible products and smoke, and blocks the entry of external heat and oxygen, thereby blocking the heat transfer and mass transfer in the combustion process. Therefore, through the combination of cardanol-based benzoxazine and boron-doped graphene, the generation of volatile products, smoke and heat in the pyrolysis and combustion process of the fabric can be significantly reduced, thereby making the flame retardant performance of the fabric have a positive effect of one plus one greater than one.

[0013] Preferably, the mass ratio of the epoxy resin, cardanol-based benzoxazine and boron-doped graphene is 10:(1.14-1.26):(0.28-0.34).

[0014] By adopting the above technical solution, the mass ratio of epoxy resin, cardanol-based benzoxazine, and boron-doped graphene is controlled within the above range, which not only improves the stability of the fabric and makes the fabric less likely to deform, but also improves the flame retardant properties of the fabric.

[0015] Preferably, the curing agent is 4,4-diaminodiphenylmethane.

[0016] Preferably, the polyester fiber is prepared by the following modification steps: Ammonium polyphosphate and silane coupling agent are added to an ethanol aqueous solution, heated for reaction, and then a silane coupling agent solution is obtained. Then, polyester fiber is immersed in the silane coupling agent solution, taken out after immersion, and then washed and dried in sequence to obtain modified polyester fiber.

[0017] By adopting the above technical solution, since the molecular structure of the polyester fiber contains fewer polar groups, the adhesion between the polyester fiber and the modified epoxy resin is relatively low.

[0018] Therefore, by treating the polyester fiber with a silane coupling agent, more silane coupling agent is adsorbed on the surface of the polyester fiber, thereby improving the adhesion between the polyester fiber and the modified epoxy resin, thereby improving the stability of the fabric and improving the wrinkle resistance of the fabric.

[0019] In addition, ammonium polyphosphate can not only decompose under heat to release non-flammable gases such as ammonia and water vapor, reducing the oxygen concentration in the air, but also ammonium polyphosphate generates polyphosphoric acid, a strong dehydrating agent, which further promotes the formation of carbonized products on the surface of the fabric body, thereby further improving the flame retardancy of the fabric.

[0020] In addition, the silane coupling agent can combine ammonium polyphosphate and polyester fibers, enhancing the adhesion of ammonium polyphosphate to the surface of polyester fibers, so that the fabric still has a flame retardant effect after washing.

[0021] Preferably, graphene oxide is further added during the modification and preparation process of the polyester fiber, and the polyester fiber is prepared by the following modification steps: S1, adding ammonium polyphosphate and a silane coupling agent to an ethanol aqueous solution, heating for reaction, to obtain a silane coupling agent solution, adding graphene oxide to deionized water, to obtain a graphene oxide dispersion, and then adding graphene oxide to the silane coupling agent solution, heating for reaction, to obtain a mixture; S2, immersing the polyester fiber in the mixture, taking it out after immersion, and then washing and drying it in sequence to obtain modified polyester fiber.

[0022] By adopting the above technical scheme, the ionization energy of hydroxyl and carboxyl groups on the surface of graphene oxide can form strong electrostatic interaction with ammonium polyphosphate, and there is strong interfacial adhesion between graphene oxide and polyester fibers, thereby promoting the interaction between ammonium polyphosphate and polyester fibers, enhancing the adhesion of ammonium polyphosphate to the surface of polyester fibers, and further improving the flame retardant effect of the fabric after multiple washings.

[0023] In addition, graphene oxide can reduce the dripping of polyphosphoric acid generated by ammonium polyphosphate and increase the carbon residue, thereby further improving the flame retardant effect of the fabric.

[0024] Preferably, the mass ratio of the ammonium polyphosphate, the silane coupling agent and the graphene oxide is 10:(0.72-0.76):(0.02-0.04).

[0025] By adopting the above technical solution and controlling the mass ratio of ammonium polyphosphate, silane coupling agent and graphene oxide within the above range, the flame retardant effect of the fabric can be effectively improved.

[0026] Preferably, the silane coupling agent is KH-550.

[0027] In a second aspect, the present application provides a method for preparing the high-strength, non-deformable polyester knitted fabric as in the first aspect, using the following technical solution: A method for preparing a high-strength, non-deformable polyester knitted fabric comprises the following steps: The polyester fiber is woven into a fabric body, and an anti-deformation agent is evenly coated on the surface of the fabric body; then, the fabric body is heated and cured so that the modified epoxy resin is cured on the surface of the fabric body to form an anti-deformation layer; finally, the fabric body is calendered to obtain a polyester knitted fabric.

[0028] In summary, the present application includes at least one of the following beneficial technical effects: 1. Polyester fiber itself has high strength, so the fabric formed by weaving polyester fiber has the advantage of high strength. The cardanol-based benzoxazine in the modified epoxy resin forms a cross-linked network with the epoxy resin, and the cardanol-based benzoxazine has the impact resistance of the epoxy resin, which effectively improves the stability of the fabric, making the fabric less likely to deform, thereby improving the wrinkle resistance of the fabric. In addition, the cardanol-based benzoxazine has the effect of promoting the thermal degradation and carbonization of the epoxy resin, thereby forming a protective carbon layer, thereby improving the flame retardancy of the fabric.

[0029] 2. Ammonium polyphosphate is flame retardant, which improves the flame retardant effect of the fabric. The silane coupling agent can combine ammonium polyphosphate and polyester fiber, enhance the adhesion of ammonium polyphosphate on the surface of polyester fiber, so that the fabric still has a flame retardant effect after washing. In addition, more silane coupling agent is adsorbed on the surface of polyester fiber, which improves the adhesion between polyester fiber and modified epoxy resin, thereby improving the stability of the fabric and improving the wrinkle resistance of the fabric. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall structure of a high-strength, non-deformable polyester knitted fabric in an embodiment of the present application.

[0031] Description of reference numerals: 1. Fabric body; 2. Anti-deformation layer. DETAILED DESCRIPTION

[0032] The following is combined with Figure 1 This application is described in further detail.

[0033] The present application embodiment discloses a high-strength, non-deformable polyester knitted fabric. Figure 1 The fabric comprises a fabric body 1, which is woven from polyester fibers. The surface of the fabric body 1 is covered with an anti-deformation layer 2, which is obtained by coating an anti-deformation agent on the surface of the fabric body 1.

[0034] The present application is described in detail below with reference to the embodiments and comparative examples.

[0035] The preparation of cardanol-based benzoxazine comprises the following steps: S100, after mixing 21.6 g of 9,10-dihydro-9-oxa-10-phosphophananthrene-10-oxide, 13.5 g of 4-aminoacetophenone, 23.3 g of aniline and 0.8 g of p-toluenesulfonic acid, under nitrogen protection, stirring and reflux reaction at 130° C. for 24 h, filtering the obtained precipitate and recrystallizing it from methanol to remove residual reagents, and then vacuum drying the filter cake at 100° C. for 12 h to obtain a diamine containing a phosphophananthrene group; S200, 42.6 g of phosphaphenanthrene-containing diamine, 75 g of cardanol, and 12 g of polyformaldehyde were mixed, stirred and refluxed at 130° C. for 4 h, the product was washed with deionized water, and then treated with anhydrous sodium sulfate, and finally the product was dried in a vacuum oven at 80° C. for 12 h to obtain cardanol-based benzoxazine.

[0036] The preparation of boron-doped graphene includes the following steps: 5 g of boric acid and 1 g of graphene were added to ionized water and ultrasonically stirred for 1 hour, then placed in a vacuum oven at 80°C for drying, ground into powder, placed in a tube furnace, in an argon atmosphere, heated to 900°C at 10°C / min, and maintained for 4 hours. After cooling to 25°C, the product was washed with 50°C hot water to remove residual boric acid, and then placed in a vacuum oven at 80°C for drying for 12 hours to obtain boron-doped graphene.

[0037] The raw materials involved in this application can all be obtained commercially, among which 9,10-dihydro-9-oxa-10-phosphophananthrene-10-oxide, 4-aminoacetophenone and polyformaldehyde are all provided by Aladdin Chemical Co., Ltd. (Shanghai, China), and 4,4-diaminodiphenylmethane is provided by Sinopharm Chemical Reagent Co., Ltd.

[0038] Example 1 The preparation method of modified epoxy resin comprises the following steps: 70 g of epoxy resin, 8.4 g of cardanol-based benzoxazine, and 16 g of curing agent were mixed, stirred evenly, poured into a mold, and cured at 100° C. for 2 hours to obtain a modified epoxy resin.

[0039] The curing agent is 4,4-diaminodiphenylmethane.

[0040] The preparation method of polyester knitted fabric comprises the following steps: The polyester fiber is woven into a fabric body, and the anti-deformation agent is evenly coated on the surface of the fabric body through an extruder head. The fabric body is then placed in a heating and curing furnace at 180°C and heated for 30 minutes to allow the modified epoxy resin to cure on the surface of the fabric body to form an anti-deformation layer. Finally, the fabric body is calendered using a calendering machine to obtain a polyester knitted fabric.

[0041] The anti-deformation agent is a modified epoxy resin.

[0042] Example 2 The preparation method of modified epoxy resin comprises the following steps: 1.96 g of boron-doped graphene was added to 20 g of acetone and subjected to ultrasonic treatment to obtain a suspension. The suspension, 70 g of epoxy resin and 8.82 g of cardanol-based benzoxazine were mixed and placed in a vacuum oven at 100°C. After the acetone was completely removed, 16 g of curing agent was added, stirred evenly and poured into a mold. The mixture was cured at 100°C for 2 hours to obtain a modified epoxy resin.

[0043] The curing agent is 4,4-diaminodiphenylmethane.

[0044] The preparation method of polyester knitted fabric comprises the following steps: The polyester fiber is woven into a fabric body, and the anti-deformation agent is evenly coated on the surface of the fabric body through an extruder head. The fabric body is then placed in a heating and curing furnace at 180°C and heated for 30 minutes to allow the modified epoxy resin to cure on the surface of the fabric body to form an anti-deformation layer. Finally, the fabric body is calendered using a calendering machine to obtain a polyester knitted fabric.

[0045] The anti-deformation agent is a modified epoxy resin.

[0046] Example 3 The preparation method of modified epoxy resin comprises the following steps: 2.38 g of boron-doped graphene was added to 20 g of acetone and ultrasonically treated to obtain a suspension. The suspension, 70 g of epoxy resin and 7.98 g of cardanol-based benzoxazine were mixed and placed in a vacuum oven at 100°C. After completely removing the acetone, 16 g of curing agent was added, stirred evenly, poured into a mold, and cured at 100°C for 2 hours to obtain a modified epoxy resin.

[0047] The curing agent is 4,4-diaminodiphenylmethane.

[0048] The preparation method of polyester knitted fabric comprises the following steps: The polyester fiber is woven into a fabric body, and the anti-deformation agent is evenly coated on the surface of the fabric body through an extruder head. The fabric body is then placed in a heating and curing furnace at 180°C and heated for 30 minutes to allow the modified epoxy resin to cure on the surface of the fabric body to form an anti-deformation layer. Finally, the fabric body is calendered using a calendering machine to obtain a polyester knitted fabric.

[0049] The anti-deformation agent is a modified epoxy resin.

[0050] Example 4 The preparation method of modified epoxy resin comprises the following steps: 2.17 g of boron-doped graphene was added to 20 g of acetone and ultrasonically treated to obtain a suspension. The suspension, 70 g of epoxy resin and 8.4 g of cardanol-based benzoxazine were mixed and placed in a vacuum oven at 100°C. After completely removing the acetone, 16 g of curing agent was added, stirred evenly, poured into a mold, and cured at 100°C for 2 hours to obtain a modified epoxy resin.

[0051] The curing agent is 4,4-diaminodiphenylmethane.

[0052] The preparation method of polyester knitted fabric comprises the following steps: The polyester fiber is woven into a fabric body, and the anti-deformation agent is evenly coated on the surface of the fabric body through an extruder head. The fabric body is then placed in a heating and curing furnace at 180°C and heated for 30 minutes to allow the modified epoxy resin to cure on the surface of the fabric body to form an anti-deformation layer. Finally, the fabric body is calendered using a calendering machine to obtain a polyester knitted fabric.

[0053] The anti-deformation agent is a modified epoxy resin.

[0054] Example 5 The difference between Example 5 and Example 4 is that the mass ratio of epoxy resin, cardanol-based benzoxazine, and boron-doped graphene is 10:1.20:0.20.

[0055] Example 6 The difference between Example 6 and Example 4 is that the mass ratio of epoxy resin, cardanol-based benzoxazine, and boron-doped graphene is 10:1.20:0.42.

[0056] Example 7 The difference between Example 7 and Example 4 is that the mass ratio of epoxy resin, cardanol-based benzoxazine, and boron-doped graphene is 10:1.04:0.31.

[0057] Example 8 The difference between Example 8 and Example 4 is that the mass ratio of epoxy resin, cardanol-based benzoxazine, and boron-doped graphene is 10:1.36:0.31.

[0058] Example 9 The difference between Example 9 and Example 4 is that the polyester fiber is prepared by the following modification steps: 10g of ammonium polyphosphate and 0.74g of silane coupling agent were added to 100g of ethanol aqueous solution (the mass concentration of ethanol aqueous solution was 72%), and the mixture was reacted at 100°C for 5h to obtain a silane coupling agent solution. Then, polyester fiber was immersed in the silane coupling agent solution at a bath ratio of 1:30, and the fiber was taken out after soaking for 30min, and then washed with deionized water. After washing, the fiber was placed in a drying oven at 80°C and dried for 8h to obtain modified polyester fiber.

[0059] The silane coupling agent is KH-550.

[0060] Example 10 The difference between Example 10 and Example 9 is that graphene oxide is further added during the modification and preparation process of the polyester fiber, and the polyester fiber is prepared by the following modification steps: S1. Add 10 g of ammonium polyphosphate and 0.72 g of a silane coupling agent to 100 g of an ethanol aqueous solution (the mass concentration of the ethanol aqueous solution is 72%), react at 100° C. for 5 h to obtain a silane coupling agent solution, add 0.04 g of graphene oxide to 16 g of deionized water to obtain a graphene oxide dispersion, then add the graphene oxide to the silane coupling agent solution, react at 100° C. for 5 h to obtain a mixture; S2. The polyester fiber is immersed in the mixture at a bath ratio of 1:30, taken out after soaking for 30 minutes, and then washed with deionized water. After washing, it is placed in a drying oven at 80° C. and dried for 8 hours to obtain modified polyester fiber.

[0061] The silane coupling agent is KH-550.

[0062] Embodiment 11 The difference between Example 11 and Example 9 is that graphene oxide is also added during the modification and preparation process of the polyester fiber.

[0063] Polyester fiber is prepared by the following modification steps: S1. Add 10 g of ammonium polyphosphate and 0.76 g of a silane coupling agent to 100 g of an ethanol aqueous solution (the mass concentration of the ethanol aqueous solution is 72%), react at 100° C. for 5 h to obtain a silane coupling agent solution, add 0.02 g of graphene oxide to 16 g of deionized water to obtain a graphene oxide dispersion, then add the graphene oxide to the silane coupling agent solution, react at 100° C. for 5 h to obtain a mixture; S2. The polyester fiber is immersed in the mixture at a bath ratio of 1:30, taken out after soaking for 30 minutes, and then washed with deionized water. After washing, it is placed in a drying oven at 80° C. and dried for 8 hours to obtain modified polyester fiber.

[0064] The silane coupling agent is KH-550.

[0065] The difference between Example 12 and Example 9 is that graphene oxide is also added during the modification and preparation process of the polyester fiber.

[0066] Polyester fiber is prepared by the following modification steps: S1. Add 10 g of ammonium polyphosphate and 0.76 g of a silane coupling agent to 100 g of an ethanol aqueous solution (the mass concentration of the ethanol aqueous solution is 72%), react at 100° C. for 5 h to obtain a silane coupling agent solution, add 0.03 g of graphene oxide to 16 g of deionized water to obtain a graphene oxide dispersion, then add the graphene oxide to the silane coupling agent solution, react at 100° C. for 5 h to obtain a mixture; S2. The polyester fiber is immersed in the mixture at a bath ratio of 1:30, taken out after soaking for 30 minutes, and then washed with deionized water. After washing, it is placed in a drying oven at 80° C. and dried for 8 hours to obtain modified polyester fiber.

[0067] The silane coupling agent is KH-550.

[0068] Embodiment 13 The difference between Example 13 and Example 12 is that the mass ratio of ammonium polyphosphate, silane coupling agent and graphene oxide is 10:0.74:0.01.

[0069] Embodiment 14 The difference between Example 14 and Example 12 is that the mass ratio of ammonium polyphosphate, silane coupling agent and graphene oxide is 10:0.74:0.05.

[0070] Embodiment 15 The difference between Example 15 and Example 12 is that the mass ratio of ammonium polyphosphate, silane coupling agent and graphene oxide is 10:0.62:0.03.

[0071] Example 16 The difference between Example 16 and Example 12 is that the mass ratio of ammonium polyphosphate, silane coupling agent and graphene oxide is 10:0.86:0.03.

[0072] Comparative Example 1 The difference between Comparative Example 1 and Example 1 is that the fabric is not coated with an anti-deformation agent.

[0073] Performance testing: 1. Anti-wrinkle performance: The test was conducted according to GB3819-1997 "Crease Horizontal Recovery Method". The fabrics in each embodiment and comparative example were cut into 5 pieces of 1.5 cm × 2 cm long strips in the warp and weft directions, and balanced for 24 hours under the conditions of constant temperature and humidity of 20°C and 65% humidity. The elastic recovery angle was measured, and the average value was taken to obtain the wrinkle recovery angle, and the test results were recorded in Table 1, where the larger the wrinkle recovery angle, the better the wrinkle resistance of the fabric.

[0074] 2. Flame retardant properties: According to GB / T5454-1997 "Textile Combustion Performance Test Oxygen Index Method", the fabrics in each embodiment and comparative example were cut into 1.5 cm × 2 cm and the initial limiting oxygen index was tested. After washing 30 times, the limiting oxygen index was tested again, and the test results were recorded in Table 1, where the larger the limiting oxygen index, the better the flame retardant effect.

[0075] Table 1 Data analysis Specifically combining the test results of Examples 2-4 and Example 1, the initial limiting oxygen index of Examples 2-4 is 31.5-31.7%, and the initial limiting oxygen index of Example 1 is 30.5%. The analysis is as follows. The difference between Examples 2-4 and Example 1 is that boron-doped graphene is added during the preparation of the modified epoxy resin, and the combination of boron-doped graphene and cardanol-based benzoxazine can significantly reduce the generation of volatile products, smoke and heat during the pyrolysis and combustion of the fabric, thereby improving the flame retardant effect of the fabric.

[0076] Specifically, in combination with the test results of Example 9 and Example 4, the wrinkle recovery angle of Example 9 is 286°, the initial limiting oxygen index is 34.2%, and the limiting oxygen index decrease value after 30 washings is 1.3%. The wrinkle recovery angle of Example 4 is 255°, the initial limiting oxygen index is 31.7%, and the limiting oxygen index decrease value after 30 washings is 2.1%. The analysis is as follows. The difference between Example 9 and Example 4 is that the polyester fiber is modified by ammonium polyphosphate and a silane coupling agent. On the one hand, the adhesion between the polyester fiber and the modified epoxy resin is improved, so that the stability of the fabric is improved. On the other hand, ammonium polyphosphate itself can reduce the oxygen concentration in the air to form a carbonized product, thereby improving the flame retardant effect of the fabric, and the silane coupling agent can combine ammonium polyphosphate and polyester fiber, enhance the adhesion of ammonium polyphosphate to the surface of the polyester fiber, so that the fabric still has a flame retardant effect after multiple washings.

[0077] Specifically combining the test results of Examples 10-12 and Example 9, the initial limiting oxygen index of Examples 10-12 is 35.6-35.8%, and the limiting oxygen index decreases by 0.3-0.5% after 30 washings. The initial limiting oxygen index of Example 9 is 34.2%, and the limiting oxygen index decreases by 1.3% after 30 washings. The analysis is as follows. The difference between Examples 10-12 and Example 9 is that graphene oxide is also added during the preparation process of polyester fiber modification. On the one hand, graphene oxide can increase the carbon residue, thereby improving the flame retardant effect of the fabric. On the other hand, it promotes the interaction between ammonium polyphosphate and polyester fiber, enhances the adhesion of ammonium polyphosphate on the surface of polyester fiber, and further improves the flame retardant effect of the fabric after multiple washings.

[0078] Specifically in combination with the test results of Example 1 and Comparative Example 1, the wrinkle recovery angle of Example 1 is 253° and the initial limiting oxygen index is 30.5%, while the wrinkle recovery angle of the comparative example is 213° and the initial limiting oxygen index is 20.3%. The analysis is as follows: the difference between Example 1 and Comparative Example 1 is that the surface of the fabric body is covered with an anti-deformation agent, and the anti-deformation agent is prepared from a modified epoxy resin mainly prepared from epoxy resin and cardanol benzoxazine. On the one hand, this is because cardanol benzoxazine forms a cross-linked network with the epoxy resin, which further improves the stability of the fabric body, thereby improving the wrinkle resistance of the fabric and making the fabric less likely to deform. On the other hand, cardanol benzoxazine promotes the thermal degradation and carbonization of the epoxy resin, thereby forming protective carbon, which improves the flame retardancy of the fabric.

[0079] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A high-strength, non-deformable polyester knitted fabric, characterized in that: The fabric body (1) comprises a fabric body (1), the fabric body (1) is woven from polyester fibers, the surface of the fabric body (1) is covered with an anti-deformation layer (2), the anti-deformation layer (2) is obtained by coating an anti-deformation agent on the surface of the fabric body (1), and the anti-deformation agent comprises a modified epoxy resin; The preparation method of the modified epoxy resin comprises the following steps: The epoxy resin, the cardanol-based benzoxazine and the curing agent are mixed, stirred evenly, and heated and cured to obtain the modified epoxy resin.

2. The high-strength, non-deformable polyester knitted fabric according to claim 1, characterized in that: Boron-doped graphene is also added during the preparation of the modified epoxy resin. The preparation method of the modified epoxy resin comprises the following steps: Boron-doped graphene is added to acetone and subjected to ultrasonic treatment to obtain a suspension; the suspension, epoxy resin and cardanol-based benzoxazine are mixed and heated, and after the acetone is completely removed, a curing agent is added, the mixture is stirred evenly, and the mixture is heated and cured to obtain a modified epoxy resin.

3. The high-strength, non-deformable polyester knitted fabric according to claim 2, characterized in that: The mass ratio of the epoxy resin, the cardanol-based benzoxazine and the boron-doped graphene is 10:(1.14-1.24):(0.28-0.34).

4. The high-strength, non-deformable polyester knitted fabric according to claim 3, characterized in that: The curing agent is 4,4-diaminodiphenylmethane.

5. The high-strength, non-deformable polyester knitted fabric according to claim 1, characterized in that: The polyester fiber modification preparation method comprises the following steps: Ammonium polyphosphate and silane coupling agent are added to an ethanol aqueous solution, heated for reaction, and then a silane coupling agent solution is obtained. Then, polyester fiber is immersed in the silane coupling agent solution, taken out after immersion, and then washed and dried in sequence to obtain modified polyester fiber.

6. The high-strength, non-deformable polyester knitted fabric according to claim 5, characterized in that: Graphene oxide is also added during the modification and preparation process of the polyester fiber, and the polyester fiber is prepared by the following modification steps: S1, adding ammonium polyphosphate and a silane coupling agent to an ethanol aqueous solution, heating for reaction, to obtain a silane coupling agent solution, adding graphene oxide to deionized water, to obtain a graphene oxide dispersion, and then adding graphene oxide to the silane coupling agent solution, heating for reaction, to obtain a mixture; S2, immersing the polyester fiber in the mixture, taking it out after immersion, and then washing and drying it in sequence to obtain modified polyester fiber.

7. The high-strength, non-deformable polyester knitted fabric according to claim 6, characterized in that: The mass ratio of the ammonium polyphosphate, the silane coupling agent and the graphene oxide is 10: (0.72-0.76): (0.02-0.04).

8. The high-strength, non-deformable polyester knitted fabric according to claim 6, characterized in that: The silane coupling agent is KH-550.

9. A method for preparing the high-strength non-deformable polyester knitted fabric according to claim 1, characterized in that: The steps include: Polyester fibers are woven into a fabric body (1), and an anti-deformation agent is evenly coated on the surface of the fabric body (1); the fabric body (1) is then heated and cured so that the modified epoxy resin is cured on the surface of the fabric body (1) to form an anti-deformation layer (2); and finally, a calendering treatment is performed to obtain a polyester knitted fabric.

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