Graphene-based modified polyester fiber yoga fabric and processing technology thereof

Abstract

The invention discloses a graphene-based modified polyester fiber yoga fabric and a processing technology thereof, and relates to the technical field of composite materials. The preparation method comprises the following steps: sequentially adding graphene oxide, gamma-aminopropyltriethoxysilane and octadecyl dimethyl trimethylsilyl propyl ammonium chloride into an ethanol water solution to obtain modified graphene; dispersing the modified graphene in ethanol, and then sequentially adding dicarboxyl-terminated PEG (polyethylene glycol), EDC (ethylene dichloride) and NHS (N-hydroxysuccinimide) to obtain PEG-GO (polyethylene glycol-graphene oxide); dispersing PEG-GO in an aqueous solution, dipping and rolling polyester fiber cloth twice, and drying to obtain GO modified polyester fiber cloth; coating a dopamine-Tris buffer solution on the surface, and then circulating the process of coating a zinc nitrate hexahydrate-methanol solution, standing, coating a 2-methylimidazole-oleic acid-methanol solution and standing; and washing and drying to obtain the modified polyester fiber yoga fabric. The yoga fabric prepared by the method has antibacterial property, moisture absorption quick-drying property and stretch resistance.

Description

Technical Field

[0001] This invention relates to the field of composite material technology, specifically to a graphene-based modified polyester fiber yoga fabric and its processing technology. Background Technology

[0002] Yoga, with its unique appeal in addressing both physical and mental well-being, shaping the body, and relieving stress, continues to gain popularity worldwide, becoming a favored healthy lifestyle choice for people of all ages. The frequent stretching and twisting movements, along with prolonged periods of close contact with the body during yoga practice, place increasingly stringent and comprehensive demands on the performance of yoga clothing. Ideal yoga fabrics not only need excellent antibacterial properties to address the hygiene and health risks posed by bacterial growth in high-temperature and high-humidity environments, but also must possess superior moisture-wicking capabilities to ensure dryness and comfort during exercise.

[0003] In summary, providing a graphene-based modified polyester fiber yoga fabric and its processing technology is of great significance. Summary of the Invention

[0004] The purpose of this invention is to provide a graphene-based modified polyester fiber yoga fabric and its processing technology to solve the problems raised in the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A processing technology for graphene-modified polyester fiber yoga fabric includes the following steps: S1: Graphene oxide, γ-aminopropyltriethoxysilane and octadecyldimethyltrimethylsilylpropylammonium chloride were added sequentially to an aqueous ethanol solution, stirred, centrifuged and washed at a temperature of 70~80℃ to obtain modified graphene. S2: Modified graphene was dispersed in ethanol, and then dicarboxylated terminal PEG, EDC and NHS were added in sequence. The mixture was stirred continuously at room temperature for 2-4 hours, centrifuged and washed to obtain PEG-GO. S3: Disperse PEG-GO in an aqueous solution, dip and rub polyester fiber fabric twice, and dry to obtain GO modified polyester fiber fabric; S4: Coat the surface of GO modified polyester fiber fabric with dopamine-Tris buffer solution, then repeat the process of "coating with zinc nitrate hexahydrate-methanol solution, standing for 1-2 hours, then coating with 2-methylimidazole-oleic acid-methanol solution, standing for 5-7 hours"; wash and dry to obtain modified polyester fiber yoga fabric.

[0006] In a more optimized manner, the raw materials for the modified graphene contain, by weight, 1-2 parts graphene oxide, 1-3 parts γ-aminopropyltriethoxysilane, and 1-3 parts octadecyldimethyltrimethylsilylpropylammonium chloride.

[0007] In a more optimized manner, the raw materials of the PEG-GO contain, by weight, 1-2 parts modified graphene, 2-4 parts dicarboxylated end-capped PEG, 3-5 parts EDC, and 2-3 parts NHS.

[0008] EDC, chemically known as 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide, and NHS, chemically known as N-hydroxysuccinimide, are typically used together as catalysts to significantly improve the reaction rate and yield under mild reaction conditions.

[0009] In a more optimized manner, in step S3, the mass ratio of PEG-GO to water in the raw material of the GO modified polyester fiber cloth is (1~2):(50~100). During the two-dip and two-roll process, the rolling yield is 40-60%, and the rolling mill pressure is 2-4 bar. Preferably, the rolling yield is 50%, and the rolling mill pressure is 3 bar.

[0010] In a more optimized manner, in step S3, the polyester fiber cloth is treated with alkali to prepare GO modified polyester fiber cloth. The alkali treatment method is as follows: the polyester fiber is placed in a 1-2% NaOH solution, the temperature is set at 55-65℃, soaked for 60-80 minutes, washed with water 6-10 times, and dried for later use.

[0011] In a more optimized manner, the mass ratio of zinc nitrate hexahydrate to methanol in the raw materials of the zinc nitrate hexahydrate-methanol solution is (3~4):(30~35); and the mass ratio of 2-methylimidazolium, oleic acid and methanol in the raw materials of the 2-methylimidazolium-oleic acid-methanol solution is (0.2~0.5):(0.5~1):(6~8).

[0012] In a more optimized manner, the raw materials of the graphene-based modified polyester fiber yoga fabric contain, by weight: 2-4 parts dopamine, 4-8 parts Tris buffer solution, 3-7 parts zinc nitrate hexahydrate-methanol solution, and 4-8 parts 2-methylimidazole-oleic acid-methanol solution.

[0013] Ideally, in step S4, the number of cycles is 10 to 15.

[0014] A graphene-based modified polyester fiber yoga fabric is used to prepare the modified polyester fiber yoga fabric.

[0015] Compared with the prior art, the beneficial effects of the present invention are: This invention modifies graphene oxide (GO) in multiple steps and applies it to the preparation of modified polyester fiber yoga fabric, thereby comprehensively improving the excellent overall properties of polyester fiber fabric, such as antibacterial properties, moisture absorption and quick-drying properties, and tensile strength.

[0016] One method involves grafting the organosilicon quaternary ammonium salt segment of octadecyldimethyltrimethylsilylpropylammonium chloride onto the GO surface using the amino group of γ-aminopropyltriethoxysilane to obtain a primary modified GO. The quaternary ammonium salt segment effectively improves the antibacterial properties of the material. Furthermore, by utilizing the reaction between amino and carboxyl groups, dicarboxyl-terminated PEG is grafted onto the GO. Due to the hydrophilicity of the PEG segment in its structure, it can form hydrophilic-hydrophobic pores with the hydrophobic segment in the octadecyldimethyltrimethylsilylpropylammonium chloride structure, thereby effectively enhancing the hydrophilic moisture-wicking network of the polyester fiber fabric. This allows for the rapid absorption of sweat from the skin surface and its wicking to the outer layer of the fabric, thus giving the fabric excellent moisture-wicking properties.

[0017] Secondly, by further utilizing the cyclic coating of zinc nitrate hexahydrate and 2-methylimidazolium-oleic acid, a ZIF and oleic acid composite functional layer is formed in situ on its surface. The regular crystal structure of ZIF forms a nano-reinforcing skeleton, which can be synergistically embedded in the fiber network with the uniformly distributed GO sheets, effectively restricting the slippage of fiber macromolecules and significantly improving its tensile strength. At the same time, ZIF has photocatalytic antibacterial activity, and its synergy with oleic acid can promote water migration through capillary action, reduce sweat residue on the skin surface, and effectively improve moisture absorption and perspiration. Detailed Implementation

[0018] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] In the following embodiments, the parts are by weight. It should be noted that there are no special restrictions on the purchase manufacturers of all the raw materials involved in this invention. Exemplary examples include: graphene oxide (model: XF033, provided by Xianfeng Nanotechnology Co., Ltd.), octadecyl dimethyltrimethylsilylpropylammonium chloride (CAS: 27668-52-6), dicarboxyl-terminated PEG (provided by Pengshuo Biotechnology Co., Ltd., molecular weight 2000), EDC (CAS: 1892-57-5), NHS (CAS: 6066-82-6), zinc nitrate hexahydrate (CAS: 10196-18-6), 2-methylimidazole (CAS: 693-98-1), and oleic acid (CAS: 112-80-1).

[0020] Pre-preparation: Preparation of alkali-treated polyester fiber cloth: Soak polyester fibers in a 2% NaOH solution at 60℃ for 70 minutes, wash 10 times with water, and dry for later use.

[0021] Example 1: A processing technology for graphene-modified polyester fiber yoga fabric, the specific steps of which are as follows: S1: 1.5 parts of graphene oxide, 2 parts of γ-aminopropyltriethoxysilane and 2 parts of octadecyldimethyltrimethylsilylpropylammonium chloride were added sequentially to 20 parts of 70% aqueous ethanol solution. The mixture was stirred, centrifuged and washed at 75°C to obtain modified graphene. S2: 1.5 parts of modified graphene were dispersed in 20 parts of ethanol, and then 3 parts of dicarboxylated terminal PEG, 4 parts of EDC and 2.5 parts of NHS were added in sequence. The mixture was stirred continuously at room temperature for 3 hours, centrifuged and washed to obtain PEG-GO. S3: Disperse 1.5 parts of PEG-GO in 75 parts of aqueous solution, dip and squeeze the alkali-treated polyester fiber fabric twice, with a squeeze rate of 50% and a squeeze pressure of 3 bar, and then dry at 75°C to obtain GO modified polyester fiber fabric. S4: Mix 3 parts dopamine with 6 parts Tris buffer solution at pH 8.5 and coat the outer surface of GO modified polyester fiber fabric. Let it stand in a humid environment for 12 hours. Then, cyclically coat the outer surface with a zinc nitrate hexahydrate-methanol solution (zinc nitrate hexahydrate and methanol mass ratio of 3.5:32), let it stand for 1.5 hours, then coat with a 2-methylimidazole, oleic acid and methanol mass ratio of 0.4:0.7:7, and let it stand for 6 hours. Repeat this cycle 13 times. The total coating amount of zinc nitrate hexahydrate-methanol solution is 5 parts, and the total coating amount of 2-methylimidazole-oleic acid-methanol solution is 6 parts. Rinse with methanol and dry to obtain modified polyester fiber yoga fabric.

[0022] Example 2: A processing technology for graphene-modified polyester fiber yoga fabric, the specific steps of which are as follows: S1: 1 part graphene oxide, 1 part γ-aminopropyltriethoxysilane and 1 part octadecyldimethyltrimethylsilylpropylammonium chloride were added sequentially to 20 parts of 70% aqueous ethanol solution. The mixture was stirred, centrifuged and washed at 75°C to obtain modified graphene. S2: Disperse 1 part of modified graphene in 20 parts of ethanol, then add 2 parts of dicarboxylated terminal PEG, 3 parts of EDC and 2 parts of NHS in sequence, stir continuously at room temperature for 2 hours, centrifuge and wash to obtain PEG-GO. S3: Disperse 1 part PEG-GO in 50 parts aqueous solution, dip and squeeze the alkali-treated polyester fiber cloth twice, with a squeeze rate of 40% and a squeeze pressure of 2 bar, and then dry at 75°C to obtain GO modified polyester fiber cloth. S4: Mix 2 parts dopamine with 4 parts Tris buffer solution at pH 8.5, coat the outer surface of GO modified polyester fiber fabric, and let it stand in a humid environment for 10 hours. Then, cyclically coat the outer surface with a zinc nitrate hexahydrate-methanol solution (zinc nitrate hexahydrate and methanol mass ratio of 3:30), let it stand for 1 hour, then coat with a 2-methylimidazole-oleic acid-methanol solution (2-methylimidazole, oleic acid and methanol mass ratio of 0.2:0.5:6), and let it stand for 5 hours. Repeat this cycle 10 times. The total coating amount of zinc nitrate hexahydrate-methanol solution is 3 parts, and the total coating amount of 2-methylimidazole-oleic acid-methanol solution is 4 parts. Rinse with methanol and dry to obtain modified polyester fiber yoga fabric.

[0023] Example 3: A processing technology for graphene-modified polyester fiber yoga fabric, the specific steps of which are as follows: S1: 2 parts of graphene oxide, 3 parts of γ-aminopropyltriethoxysilane and 3 parts of octadecyldimethyltrimethylsilylpropylammonium chloride were added sequentially to 20 parts of 70% aqueous ethanol solution. The mixture was stirred, centrifuged and washed at 75°C to obtain modified graphene. S2: 2 parts of modified graphene were dispersed in 20 parts of ethanol, and then 4 parts of dicarboxylated PEG, 5 parts of EDC and 3 parts of NHS were added in sequence. The mixture was stirred at room temperature for 4 hours, centrifuged and washed to obtain PEG-GO. S3: Disperse 2 parts of PEG-GO in 100 parts of aqueous solution, dip and squeeze the alkali-treated polyester fiber fabric twice, with a squeeze rate of 60% and a squeeze pressure of 4 bar, and then dry at 75°C to obtain GO modified polyester fiber fabric. S4: Mix 3 parts of dopamine with 8 parts of Tris buffer solution at pH 8.5, coat the outer surface of GO modified polyester fiber fabric, and let it stand in a humid environment for 14 hours. Then, cyclically coat the outer surface with a zinc nitrate hexahydrate-methanol solution (zinc nitrate hexahydrate and methanol mass ratio of 4:35), let it stand for 2 hours, then coat with a 2-methylimidazole-oleic acid-methanol solution (2-methylimidazole, oleic acid and methanol mass ratio of 0.5:1:8), and let it stand for 7 hours. Repeat this cycle 15 times. The total coating amount of zinc nitrate hexahydrate-methanol solution is 7 parts, and the total coating amount of 2-methylimidazole-oleic acid-methanol solution is 8 parts. Rinse with methanol and dry to obtain modified polyester fiber yoga fabric.

[0024] Comparative Example 1: Based on Example 1, this comparative example does not include octadecyldimethyltrimethylsilylpropylammonium chloride, but remains the same as Example 1. The specific steps are as follows: S1: 1.5 parts of graphene oxide and 2 parts of γ-aminopropyltriethoxysilane were added sequentially to 20 parts of 70% ethanol aqueous solution. The mixture was stirred, centrifuged and washed at 75°C to obtain modified graphene. S2: 1.5 parts of modified graphene were dispersed in 20 parts of ethanol, and then 3 parts of dicarboxylated terminal PEG, 4 parts of EDC and 2.5 parts of NHS were added in sequence. The mixture was stirred continuously at room temperature for 3 hours, centrifuged and washed to obtain PEG-GO. S3: Disperse 1.5 parts of PEG-GO in 75 parts of aqueous solution, dip and squeeze the alkali-treated polyester fiber fabric twice, with a squeeze rate of 50% and a squeeze pressure of 3 bar, and then dry at 75°C to obtain GO modified polyester fiber fabric. S4: Mix 3 parts dopamine with 6 parts Tris buffer solution at pH 8.5 and coat the outer surface of GO modified polyester fiber fabric. Let it stand in a humid environment for 12 hours. Then, cyclically coat the outer surface with a zinc nitrate hexahydrate-methanol solution (zinc nitrate hexahydrate and methanol mass ratio of 3.5:32), let it stand for 1.5 hours, then coat with a 2-methylimidazole-oleic acid-methanol solution (2-methylimidazole, oleic acid and methanol mass ratio of 0.4:0.7:7), and let it stand for 6 hours. Repeat this cycle 13 times. The total coating amount of zinc nitrate hexahydrate-methanol solution is 5 parts, and the total coating amount of 2-methylimidazole-oleic acid-methanol solution is 6 parts. Rinse with methanol and dry to obtain modified polyester fiber yoga fabric.

[0025] Comparative Example 2: Based on Example 1, in this comparative example, GO modified polyester fiber fabric was used directly as the modified polyester fiber yoga fabric, and the rest remained the same as in Example 1. The specific steps are as follows: S1: 1.5 parts of graphene oxide, 2 parts of γ-aminopropyltriethoxysilane and 2 parts of octadecyldimethyltrimethylsilylpropylammonium chloride were added sequentially to 20 parts of 70% aqueous ethanol solution. The mixture was stirred, centrifuged and washed at 75°C to obtain modified graphene. S2: 1.5 parts of modified graphene were dispersed in 20 parts of ethanol, and then 3 parts of dicarboxylated terminal PEG, 4 parts of EDC and 2.5 parts of NHS were added in sequence. The mixture was stirred continuously at room temperature for 3 hours, centrifuged and washed to obtain PEG-GO. S3: Disperse 1.5 parts of PEG-GO in 75 parts of aqueous solution, dip and nibble the alkali-treated polyester fiber fabric twice, with a nibble rate of 50% and a nibble pressure of 3 bar, and then dry at 75°C to obtain modified polyester fiber yoga fabric.

[0026] Comparative Example 3: Based on Example 1, in this comparative example, during the cyclic coating process in step S4, oleic acid was not added to the 2-methylimidazole-oleic acid-methanol solution. The 2-methylimidazole-methanol solution was used to prepare the modified polyester fiber yoga fabric. The rest was consistent with Example 1. The specific steps are as follows: S1: 1.5 parts of graphene oxide, 2 parts of γ-aminopropyltriethoxysilane and 2 parts of octadecyldimethyltrimethylsilylpropylammonium chloride were added sequentially to 20 parts of 70% aqueous ethanol solution. The mixture was stirred, centrifuged and washed at 75°C to obtain modified graphene. S2: 1.5 parts of modified graphene were dispersed in 20 parts of ethanol, and then 3 parts of dicarboxylated terminal PEG, 4 parts of EDC and 2.5 parts of NHS were added in sequence. The mixture was stirred continuously at room temperature for 3 hours, centrifuged and washed to obtain PEG-GO. S3: Disperse 1.5 parts of PEG-GO in 75 parts of aqueous solution, dip and squeeze the alkali-treated polyester fiber fabric twice, with a squeeze rate of 50% and a squeeze pressure of 3 bar, and then dry at 75°C to obtain GO modified polyester fiber fabric. S4: Mix 3 parts dopamine with 6 parts Tris buffer solution at pH 8.5 and coat the outer surface of GO modified polyester fiber fabric. Let it stand in a humid environment for 12 hours. Then, cyclically coat the outer surface with a zinc nitrate hexahydrate-methanol solution (zinc nitrate hexahydrate to methanol mass ratio of 3.5:32), let it stand for 1.5 hours, then coat with a 2-methylimidazole-methanol solution (2-methylimidazole to methanol mass ratio of 0.4:7), and let it stand for 6 hours. Repeat this cycle 13 times. The total coating amount of zinc nitrate hexahydrate-methanol solution is 5 parts and the total coating amount of 2-methylimidazole-methanol solution is 6 parts. Rinse with methanol and dry to obtain modified polyester fiber yoga fabric.

[0027] Comparative Example 4: Based on Example 1, in this comparative example, the polyester fiber fabric was not treated with alkali. Modified polyester fiber yoga fabric was prepared using basic polyester fiber fabric. The rest was consistent with Example 1. The specific steps are as follows: S1: 1.5 parts of graphene oxide, 2 parts of γ-aminopropyltriethoxysilane and 2 parts of octadecyldimethyltrimethylsilylpropylammonium chloride were added sequentially to 20 parts of 70% aqueous ethanol solution. The mixture was stirred, centrifuged and washed at 75°C to obtain modified graphene. S2: 1.5 parts of modified graphene were dispersed in 20 parts of ethanol, and then 3 parts of dicarboxylated terminal PEG, 4 parts of EDC and 2.5 parts of NHS were added in sequence. The mixture was stirred continuously at room temperature for 3 hours, centrifuged and washed to obtain PEG-GO. S3: Disperse 1.5 parts of PEG-GO in 75 parts of aqueous solution, dip and squeeze the base polyester fiber fabric twice, with a squeeze rate of 50% and a rolling pressure of 3 bar, and then dry at 75°C to obtain GO modified polyester fiber fabric. S4: Mix 3 parts dopamine with 6 parts Tris buffer solution at pH 8.5 and coat the outer surface of GO modified polyester fiber fabric. Let it stand in a humid environment for 12 hours. Then, cyclically coat the outer surface with a zinc nitrate hexahydrate-methanol solution (zinc nitrate hexahydrate and methanol mass ratio of 3.5:32), let it stand for 1.5 hours, then coat with a 2-methylimidazole-oleic acid-methanol solution (2-methylimidazole, oleic acid and methanol mass ratio of 0.4:0.7:7), and let it stand for 6 hours. Repeat this cycle 13 times. The total coating amount of zinc nitrate hexahydrate-methanol solution is 5 parts, and the total coating amount of 2-methylimidazole-oleic acid-methanol solution is 6 parts. Rinse with methanol and dry to obtain modified polyester fiber yoga fabric.

[0028] Performance testing: 1. Antibacterial performance test: Staphylococcus aureus was used to shake the modified polyester fiber yoga fabric with the bacterial solution for 12 hours, and the antibacterial rate was calculated. 2. Moisture absorption performance test: According to the national standard GB / T21655.2-2019 "Evaluation of moisture absorption and quick-drying properties - Part 2: Dynamic moisture transfer method", the moisture absorption and quick-drying properties of the skin-contact surface of the prepared modified polyester fiber yoga fabric were tested. 3. Tensile strength test: The modified polyester fiber yoga fabric was tested using a universal testing machine to obtain its tensile strength, which characterizes its tensile strength.

[0029]

[0030] Conclusion: Comparison of the test data in the tables of Examples 1-3 shows that the graphene-modified polyester fiber yoga fabric prepared by this method has excellent comprehensive performance. Grafting octadecyldimethyltrimethylsilylpropylammonium chloride onto graphene oxide endows the material with antibacterial properties; the strong hydrophilic polyethylene glycol segments are firmly grafted onto the terminal amino groups of γ-aminopropyltriethoxysilane, effectively improving the moisture absorption and quick-drying properties of the polyester fiber; the strong adhesion and metal chelating ability of dopamine generate ZIF and oleic acid functional layers in situ on the outer surface, which, together with the uniformly dispersed graphene oxide sheets and ZIF crystals, form a nano-reinforcing skeleton in the fiber network, significantly improving the tensile properties of the fabric through stress transfer and dispersion mechanisms.

[0031] By comparing the data in Tables 1 and 1-3 of Example 1, it can be seen that in Comparative Example 1, the absence of quaternary ammonium salts led to a sharp deterioration in the antibacterial properties of the fabric. In Comparative Example 2, only the GO-modified polyester fiber fabric was retained while the ZIF and oleic acid functional layers were omitted, which directly resulted in a decrease in moisture absorption and quick-drying properties, as well as a reduction in mechanical properties. In Comparative Example 3, no oleic acid was added, and the outer layer was only a ZIF functional layer. Therefore, the synergistic capillary effect of ZIF and oleic acid was reduced, and the water migration rate decreased accordingly, further leading to a decrease in moisture absorption and quick-drying properties. In Comparative Example 4, the polyester fiber fabric substrate was not treated with alkali, and all its properties were the worst, with a significant decrease in moisture absorption, quick-drying properties, and tensile strength. This is because alkali treatment can increase the surface roughness of the fiber and activate its surface active groups, thereby ensuring the fundamental role of the PEG-GO functional layer in firmly loading. The instability of the functional base layer further affected the quality of the subsequent ZIF and oleic acid functional layers, ultimately leading to a comprehensive decline in overall performance. In summary, this invention uses graphene oxide as a base and modifies it multiple times as a modifier for polyester fiber fabric. This results in the formation of a functional layer of ZIF and oleic acid grown on the outer layer of the polyester fiber fabric, which grafts quaternary ammonium salt and PEG segments onto the inner layer. This produces a multifunctional polyester yoga fabric that combines high-efficiency antibacterial properties, rapid moisture absorption and quick-drying properties, and significantly improved tensile strength, thus meeting the needs of yoga wear.

[0032] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

Claims

1. A processing technology for graphene-modified polyester fiber yoga fabric, characterized in that: Includes the following steps: S1: Graphene oxide, γ-aminopropyltriethoxysilane and octadecyldimethyltrimethylsilylpropylammonium chloride were added sequentially to an aqueous ethanol solution, stirred, centrifuged and washed at a temperature of 70~80℃ to obtain modified graphene. S2: Modified graphene was dispersed in ethanol, and then dicarboxylated terminal PEG, EDC and NHS were added in sequence. The mixture was stirred continuously at room temperature for 2-4 hours, centrifuged and washed to obtain PEG-GO. S3: Disperse PEG-GO in an aqueous solution, dip and rub polyester fiber fabric twice, and dry to obtain GO modified polyester fiber fabric; S4: Coat the surface of GO modified polyester fiber fabric with dopamine-Tris buffer solution, then cycle through the process of "coating with zinc nitrate hexahydrate-methanol solution, standing for 1-2 hours, then coating with 2-methylimidazole-oleic acid-methanol solution, standing for 5-7 hours"; wash and dry to obtain modified polyester fiber yoga fabric.

2. The processing technology for a graphene-modified polyester fiber yoga fabric according to claim 1, characterized in that: The raw materials for the modified graphene, by weight, are: 1-2 parts graphene oxide, 1-3 parts γ-aminopropyltriethoxysilane, and 1-3 parts octadecyldimethyltrimethylsilylpropylammonium chloride.

3. The processing technology for a graphene-modified polyester fiber yoga fabric according to claim 1, characterized in that: The raw materials of the PEG-GO contain, by weight, 1-2 parts modified graphene, 2-4 parts dicarboxylated PEG, 3-5 parts EDC, and 2-3 parts NHS.

4. The processing technology for a graphene-modified polyester fiber yoga fabric according to claim 1, characterized in that: In step S3, the mass ratio of PEG-GO to water in the raw material of the GO modified polyester fiber cloth is (1~2):(50~100). During the two-dip and two-roll process, the liquid yield is 40-60% and the rolling mill pressure is 2-4 bar.

5. The processing technology for a graphene-modified polyester fiber yoga fabric according to claim 1, characterized in that: In step S3, the polyester fiber cloth is treated with alkali to prepare GO modified polyester fiber cloth. The alkali treatment method is as follows: the polyester fiber is placed in a 1-2% NaOH solution, the temperature is set at 55-65℃, soaked for 60-80 minutes, washed with water 6-10 times, and dried for later use.

6. The processing technology for a graphene-modified polyester fiber yoga fabric according to claim 1, characterized in that: In the raw materials of the zinc nitrate hexahydrate-methanol solution, the mass ratio of zinc nitrate hexahydrate to methanol is (3~4):(30~35); in the raw materials of the 2-methylimidazole-oleic acid-methanol solution, the mass ratio of 2-methylimidazole, oleic acid and methanol is (0.2~0.5):(0.5~1):(6~8).

7. The processing technology for a graphene-modified polyester fiber yoga fabric according to claim 1, characterized in that: The raw materials of the modified polyester fiber yoga fabric, by weight, are: 2-4 parts dopamine, 4-8 parts Tris buffer solution, 3-7 parts zinc nitrate hexahydrate-methanol solution, and 4-8 parts 2-methylimidazole-oleic acid-methanol solution.

8. The processing technology for a graphene-modified polyester fiber yoga fabric according to claim 1, characterized in that: In step S4, the cycle is repeated 10 to 15 times.

9. The modified polyester fiber yoga fabric prepared by the processing technology of graphene-based modified polyester fiber yoga fabric according to any one of claims 1 to 8.

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