Nanoparticle modified antibacterial fabric and preparation method thereof

Abstract

The invention discloses a nanoparticle modified antibacterial fabric and a preparation method thereof, and relates to the field of fabrics. When the nano particle modified antibacterial fabric is prepared, triethyl phosphite firstly reacts with 1-(1-bromoethyl)-3, 5-bis-trifluoromethyl-benzene, then is polymerized with dimethyl terephthalate, polyethylene glycol-2000, ethylene glycol and N-methyldiethanolamine, and finally reacts with 3-bromopropionyl chloride to prepare modified polyester; the preparation method comprises the following steps: reacting 5-amino-2-sulfydryl benzimidazole with nano graphene oxide to prepare modified graphene oxide; mixing the modified polyester, the modified graphene oxide and zinc acetate, and performing melt spinning, spinning and weaving to obtain the nano particle modified antibacterial fabric. The nano particle modified antibacterial fabric prepared by the invention has flame-retardant, durable and waterproof capabilities.

Description

TECHNICAL FIELD

[0001] The application relates to the field of fabrics, in particular to a nano-particle modified antibacterial fabric and a preparation method thereof. BACKGROUND

[0002] Fabrics are often used to make clothes, as one of the three elements of clothes, fabrics can not only interpret the style and characteristics of clothes, but also directly affect the performance effect of color and modeling of clothes. The fabric of clothes is mainly divided into natural fibers (cotton, hemp, silk and wool, etc.) and chemical fiber fabrics (polyester, nylon and lyocell, etc.), in addition to blended fabrics, In daily production and life, various bacteria are often contacted, and fabrics without antibacterial properties are prone to bacterial growth and peculiar smell, especially in humid or high-temperature environments, sweat residues can accelerate the reproduction of microorganisms, and long-term wearing may cause skin itching, allergy and even infection, thereby threatening human health. Therefore, the application introduces a nano-particle modified antibacterial fabric and a preparation method thereof. SUMMARY

[0003] The application aims to provide a nano-particle modified antibacterial fabric and a preparation method thereof to solve the problems in the prior art.

[0004] A nano-particle modified antibacterial fabric is prepared by mixing modified polyester, modified graphene oxide and zinc acetate, melt spinning, spinning, and weaving. The modified graphene oxide is prepared by reacting 5-amino 2-mercapto benzimidazole with nano graphene oxide. The modified polyester is prepared by first reacting triethyl phosphite with 1-(1-bromoethyl)-3,5-bis-trifluoromethyl-benzene, then with dimethyl terephthalate, polyethylene glycol-2000, ethylene glycol and N-methyl diethanolamine, and finally with 3-bromopropionyl chloride.

[0005] A preparation method of a nano-particle modified antibacterial fabric mainly comprises the following preparation steps: (1) 3-bromopropionyl chloride, ethanol and pre-modified polyester are mixed in a mass ratio of 1:20-30:11-13, stirred at 58-62 DEG C and 200-300 r / min for 28-32 min, an ethanol mixed solvent is added, and stirring is continued for 11.8-12.2 h, then the mixture is filtered, washed with anhydrous diethyl ether for 8-10 times, and vacuum dried at-10-0 DEG C for 22-26 h to obtain modified polyester; (2) mixing 5-amino 2-mercapto benzimidazole, nano graphene oxide and deionized water according to the mass ratio of 5-7:2-3:20-30, ultrasonic for 28-32 min, heating to 88-92℃, stirring at 200-300 r / min for 30-40 min, filtering, drying at 58-62℃ for 23-25 h to prepare modified graphene oxide; (3) mixing zinc acetate, modified polyester and modified graphene oxide according to the mass ratio of 0.3-0.4:6-8:1, uniformly, stirring at 260-266℃, 200-300 r / min for 10-14 min, melt spinning to prepare polyester fiber, spinning the polyester fiber, weaving to prepare nano particle modified antibacterial fabric.

[0006] As an optimization, the mixed solvent in step (1) is prepared by mixing propanol and methanol according to the volume ratio of 1:4.8-5.2 uniformly.

[0007] As an optimization, the pre-modified polyester in step (1) is prepared by mixing dimethyl terephthalate, polyethylene glycol-2000, ethylene glycol, flame retardant monomer, N-methyl diethanolamine and zinc acetate according to the mass ratio of 7-9:65-75:1.8-2.2:1.8-2.2:1.6-1.8:0.8-1.2, stirring at 176-184℃, 200-300 r / min for 3-4 h, cooling to room temperature, grinding to 4-6 mesh.

[0008] As an optimization, the flame retardant monomer is prepared by mixing triethyl phosphite and 1-(1-bromoethyl)-3,5-bis-trifluoromethyl-benzene according to the molar ratio of 1:3.8-4.2, stirring at 128-132℃, 200-300 r / min for 5.8-6.2 h.

[0009] As an optimization, the specific operation of melt spinning in step (3) is as follows: spinning temperature 256-258℃, extrusion rate 18-22 r / min, winding rate 9-12 r / min, the spun yarn is drawn to 3-5 times at room temperature, then drawn to 8-10 times at 110-120℃, and set at 128-132℃ for 70-90 s.

[0010] As an optimization, the spinning in step (3) refers to spinning yarn by using FA320A high-speed drawing frame, THC2015 type full-automatic doffer roving frame, TH598 type spinning frame and GMR001 type small winding machine in sequence, and the drawing process is as follows: 6 ends are combined, and the draft ratio is 1.6-1.8 times; the roving process is as follows: the draft ratio in the back zone is 1.1-1.3 times, the roving twist factor is 118-122, and the roving weight is 6 g / (10 m); the spinning process is as follows: the draft ratio in the back zone is 1.1-1.3 times, the gauge block specification is 3.0 mm, and the spindle speed is 10000-12000 rpm.

[0011] Compared with the prior art, the beneficial effects achieved by the present invention are: In preparing nanoparticle-modified antibacterial fabric, this invention involves reacting triethyl phosphite with 1-(1-bromoethyl)-3,5-bis-trifluoromethyl-benzene, then polymerizing it with dimethyl terephthalate, polyethylene glycol-2000, ethylene glycol, and N-methyldiethanolamine, and finally reacting it with 3-bromopropionyl chloride to obtain modified polyester. 5-Amino-2-mercaptobenzimidazole is reacted with nano-graphene oxide to obtain modified graphene oxide. The modified polyester, modified graphene oxide, and zinc acetate are mixed, melt-spun, spun into yarn, and woven to obtain the nanoparticle-modified antibacterial fabric.

[0012] First, triethyl phosphite is reacted with 1-(1-bromoethyl)-3,5-bis-trifluoromethylbenzene, then polymerized with dimethyl terephthalate, polyethylene glycol-2000, ethylene glycol, and N-methyldiethanolamine, and finally reacted with 3-bromopropionyl chloride to obtain a modified polyester. Triethyl phosphite is first reacted with 1-(1-bromoethyl)-3,5-bis-trifluoromethylbenzene to form a phosphate ester. Upon thermal decomposition, this ester produces phosphoric acid, metaphosphoric acid, and other substances. These substances have strong dehydrating properties, promoting dehydration and carbonization of the polymer surface. The resulting char layer reduces heat conduction between the flame and the polymer, while simultaneously isolating oxygen and inhibiting the combustion reaction. Furthermore, the phosphorus-oxygen free radicals generated during decomposition can capture hydrogen free radicals. Active free radicals interrupt the combustion chain reaction, achieving a flame-retardant effect. Simultaneously, trifluoromethyl groups are introduced; the high electronegativity of fluorine atoms in the trifluoromethyl group weakens intermolecular forces, forming a low surface energy surface. This makes it difficult for liquids such as water and oil to wet the material surface, achieving a waterproof effect. Finally, it reacts with 3-bromopropionyl chloride, which reacts with the tertiary amine on the pre-modified polyester surface to form quaternary ammonium salts. These quaternary ammonium salts can adsorb onto the surface of bacterial cell membranes, attracting negatively charged components on the cell membrane through electrostatic interactions, thereby altering the cell membrane's permeability. They can also embed into the lipid bilayer of the bacterial cell membrane, interfering with the arrangement and flow of lipid molecules, causing damage to the cell membrane's integrity, thus achieving an antibacterial effect.

[0013] Secondly, 5-amino-2-mercaptobenzimidazole is reacted with nano-graphene oxide to prepare modified graphene oxide. Modified polyester, modified graphene oxide, and zinc acetate are mixed, melt-spun, spun into yarn, and woven to obtain nanoparticle-modified antibacterial fabric. The reaction of 5-amino-2-mercaptobenzimidazole with nano-graphene oxide enriches the surface of the graphene oxide with 5-amino-2-mercaptobenzimidazole, which can complex with zinc ions. When zinc ions are attracted by the negative charge into the bacteria, they combine with the functional groups inside the bacteria, causing protein denaturation and impairing the catalytic metabolism of other reactions, ultimately leading to bacterial death and achieving an antibacterial effect. Furthermore, the mixture is combined with modified polyester and zinc acetate, and through the reaction of thiol groups with acyl chlorides, a thiol ester is formed. This ester works in conjunction with the benzimidazole structure, utilizing the lone pair electrons of the sulfur atom to reduce the rigidity of the phenylbenzimidazole structure, increasing the relative molecular mass of the compound, improving its stability, and simultaneously enhancing ultraviolet absorption intensity, thereby achieving anti-aging properties. Detailed Implementation

[0014] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. 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 of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0015] The spinning described in the following embodiments and comparative examples refers to spinning using a FA320A high-speed drawing frame, a THC2015 fully automatic doffing roving frame, a TH598 spinning frame, and a GMR001 small winding machine in sequence. The drawing process uses 6 yarns combined at a draft ratio of 1.7. The roving process has a back zone draft ratio of 1.2, a roving twist coefficient of 120, and a roving weight of 6 g / (10m). The spinning process has a back zone draft ratio of 1.2, a spacer block size of 3.0 mm, and a spindle speed of 11000 rpm. Example 1:

[0016] A method for preparing a nanoparticle-modified antibacterial fabric mainly includes the following preparation steps: (1) Triethyl phosphite and 1-(1-bromoethyl)-3,5-bis-trifluoromethyl-benzene were mixed in a molar ratio of 1:3.8 and stirred at 128°C and 200 r / min for 5.8 h to obtain a flame retardant monomer; Dimethyl terephthalate, polyethylene glycol-2000, ethylene glycol, flame retardant monomer, N-methyldiethanolamine and zinc acetate were mixed in a mass ratio of 7:65:1.8:1.8:1.6:0.8, stirred at 176℃ and 200r / min for 3h, cooled to room temperature, and ground to 4 mesh to obtain pre-modified polyester. Propanol and methanol were mixed evenly at a volume ratio of 1:4.8 to obtain a mixed solvent; 3-bromopropionyl chloride, ethanol, and pre-modified polyester were mixed at a mass ratio of 1:20:11 and stirred at 58℃ and 200r / min for 28min. The ethanol mixed solvent was added, and stirring was continued for 11.8h. The mixture was filtered, washed 8 times with anhydrous diethyl ether, and dried under vacuum at -10℃ for 22h to obtain the modified polyester. (2) 5-amino-2-mercaptobenzimidazole, nano-graphene oxide and deionized water were mixed in a mass ratio of 5:2:20, sonicated for 28 min, heated to 88℃, stirred at 200 r / min for 30 min, filtered, and dried at 58℃ for 23 h to obtain modified graphene oxide. (3) Zinc acetate, modified polyester and modified graphene oxide are mixed evenly at a mass ratio of 0.3:6:1. Stir at 260℃ and 200r / min for 10min, melt spin at 256℃, extrusion rate of 18r / min and winding rate of 9r / min. The spun yarn is placed in a traction machine and stretched to 3 times at room temperature, then stretched to 8 times at 110℃ and set at 128℃ for 70s to obtain polyester fiber. The polyester fiber is spun and woven to obtain nanoparticle modified antibacterial fabric. Example 2:

[0017] A method for preparing a nanoparticle-modified antibacterial fabric mainly includes the following preparation steps: (1) Triethyl phosphite and 1-(1-bromoethyl)-3,5-bis-trifluoromethyl-benzene were mixed in a molar ratio of 1:4 and stirred at 130°C and 250 r / min for 6 h to obtain a flame retardant monomer; Dimethyl terephthalate, polyethylene glycol-2000, ethylene glycol, flame retardant monomer, N-methyldiethanolamine and zinc acetate were mixed in a mass ratio of 8:70:2:2:1.7:1 and stirred at 180℃ and 250r / min for 3.5h. After cooling to room temperature, the mixture was ground to 5 mesh to obtain a pre-modified polyester. Propanol and methanol were mixed evenly at a volume ratio of 1:5 to obtain a mixed solvent. 3-bromopropionyl chloride, ethanol, and pre-modified polyester were mixed at a mass ratio of 1:25:12 and stirred at 60℃ and 250r / min for 30min. Ethanol mixed solvent was added, and stirring was continued for 12h. The mixture was filtered, washed 9 times with anhydrous diethyl ether, and vacuum dried at -5℃ for 24h to obtain the modified polyester. (2) 5-amino-2-mercaptobenzimidazole, nano-graphene oxide and deionized water were mixed in a mass ratio of 6:2.5:25, sonicated for 30 min, heated to 90 °C, stirred at 250 r / min for 35 min, filtered, and dried at 60 °C for 24 h to obtain modified graphene oxide. (3) Zinc acetate, modified polyester and modified graphene oxide are mixed evenly at a mass ratio of 0.35:7:1 and stirred at 263℃ and 250r / min for 12min. The mixture is then melt-spun at a spinning temperature of 257℃, an extrusion rate of 20r / min and a winding rate of 10r / min. The spun yarn is placed in a traction machine and stretched to 4 times at room temperature, then stretched to 9 times at 115℃ and set at 130℃ for 80s to obtain polyester fiber. The polyester fiber is then spun and woven to obtain nanoparticle modified antibacterial fabric. Example 3:

[0018] A method for preparing a nanoparticle-modified antibacterial fabric mainly includes the following preparation steps: (1) Triethyl phosphite and 1-(1-bromoethyl)-3,5-bis-trifluoromethyl-benzene were mixed in a molar ratio of 1:4.2 and stirred at 132°C and 300 r / min for 6.2 h to obtain a flame retardant monomer; Dimethyl terephthalate, polyethylene glycol-2000, ethylene glycol, flame retardant monomer, N-methyldiethanolamine and zinc acetate were mixed in a mass ratio of 9:75:2.2:2.2:1.8:1.2, stirred at 184℃ and 300r / min for 4h, cooled to room temperature, and ground to 6 mesh to obtain pre-modified polyester. Propanol and methanol were mixed evenly at a volume ratio of 1:5.2 to obtain a mixed solvent; 3-bromopropionyl chloride, ethanol, and pre-modified polyester were mixed at a mass ratio of 1:30:13 and stirred at 62℃ and 300r / min for 32min. The ethanol mixed solvent was added, and stirring was continued for 12.2h. The mixture was filtered, washed 10 times with anhydrous diethyl ether, and dried under vacuum at 0℃ for 26h to obtain the modified polyester. (2) 5-amino-2-mercaptobenzimidazole, nano-graphene oxide and deionized water were mixed in a mass ratio of 7:3:30, sonicated for 32 min, heated to 92℃, stirred at 300 r / min for 40 min, filtered, and dried at 62℃ for 25 h to obtain modified graphene oxide. (3) Zinc acetate, modified polyester and modified graphene oxide are mixed evenly at a mass ratio of 0.4:8:1. Stir at 266℃ and 300r / min for 14min, melt spin at 258℃, extrusion rate of 22r / min and winding rate of 12r / min. The spun yarn is placed in a traction machine and stretched to 5 times at room temperature, then stretched to 10 times at 120℃ and set at 132℃ for 90s to obtain polyester fiber. The polyester fiber is spun and woven to obtain nanoparticle modified antibacterial fabric.

[0019] Comparative Example 1: The difference between the preparation method of the nanoparticle-modified antibacterial fabric in Comparative Example 1 and Example 2 lies in step (1). Step (1) is modified as follows: triethyl phosphite and 1-(1-bromoethyl)-3,5-bis-trifluoromethyl-benzene are mixed in a molar ratio of 1:3.8 and stirred at 128°C and 200 r / min for 5.8 h to obtain a flame-retardant monomer; dimethyl terephthalate, polyethylene glycol-2000, ethylene glycol, flame-retardant monomer, N-methyldiethanolamine, and zinc acetate are mixed in a mass ratio of 7:65:1.8:1.8:1.6:0.8 and stirred at 176°C and 200 r / min for 3 h, cooled to room temperature, and ground to 4 mesh to obtain modified polyester. The remaining steps are the same as in Example 2.

[0020] Comparative Example 2: The difference between the preparation method of the nanoparticle-modified antibacterial fabric in Comparative Example 2 and Example 2 lies in step (1). Step (1) is modified as follows: Dimethyl terephthalate, polyethylene glycol-2000, ethylene glycol, N-methyldiethanolamine, and zinc acetate are mixed in a mass ratio of 7:65:1.8:1.6:0.8, stirred at 176°C and 200 r / min for 3 h, cooled to room temperature, and ground to 4 mesh to obtain pre-modified polyester; propanol and methanol are mixed evenly in a volume ratio of 1:4.8 to obtain a mixed solvent; 3-bromopropionyl chloride, ethanol, and pre-modified polyester are mixed in a mass ratio of 1:20:11, stirred at 58°C and 200 r / min for 28 min, ethanol mixed solvent is added, stirring is continued for 11.8 h, filtered, washed 8 times with anhydrous diethyl ether, and vacuum dried at -10°C for 22 h to obtain modified polyester. The remaining steps are the same as in Example 2.

[0021] Comparative Example 3: The preparation method of the nanoparticle-modified antibacterial fabric in Comparative Example 3 differs from that in Example 2 in that it does not modify the nano-graphene oxide and does not introduce zinc acetate in step (3). The remaining steps are the same as in Example 2.

[0022] Test Example 1: Aging resistance, water resistance and flame retardancy tests: Aging resistance test method: Single yarns of fabrics made in each example and comparative example were tested. The tensile strength was tested according to GB / T9997-1988 and recorded as A0. The tensile strength was tested again after irradiating the sample with a fluorescent ultraviolet lamp UV-A340 for 20 days according to ISO4892-3 and recorded as A1. The tensile strength retention rate was calculated, where the tensile strength retention rate = A1 / A0 × 100%. Flame retardancy test method: The limiting oxygen index is tested according to the GB / T5454—1997 test standard; Waterproofing test: The surface water contact angle of the monoyarns produced in each embodiment and comparative example was tested. The results are shown in Table 1.

[0023] Table 1

[0024] The experimental data in Table 1 show that the nanoparticle-modified antibacterial fabric prepared by this invention has good aging resistance, flame retardancy and waterproofing capabilities.

[0025] A comparison of the experimental data of Examples 1, 2, 3 and Comparative Example 1 in Table 1 reveals that Examples 1, 2, and 3 exhibit high fracture strength retention rates. The difference between Comparative Example 1 and the Examples is that the pre-modified polyester was not reacted with 1-(1-bromoethyl)-3,5-bis-trifluoromethyl-benzene. This indicates that the pre-modified polyester reacts with 1-(1-bromoethyl)-3,5-bis-trifluoromethyl-benzene and finally reacts with the thiol group on the benzimidazole on the surface of graphene oxide to form a thiol ester. The lone pair electrons of the sulfur atom reduce the rigidity of the phenylbenzimidazole structure, increase the relative molecular mass of the compound, improve its stability, and enhance the ultraviolet absorption intensity, thereby strengthening the ultraviolet absorption capacity of the material. A comparison of the experimental data from Examples 1, 2, 3 and Comparative Example 3 reveals that Examples 1, 2, and 3 exhibit high fracture strength retention rates. The difference between Comparative Example 3 and the Examples is that the graphene oxide was not modified, indicating that the benzimidazole structure possesses ultraviolet absorption capabilities, which can enhance the material's aging resistance. A comparison of the experimental data from Examples 1, 2, and 3 and Comparative Example 2 reveals that Examples 1, 2, and 3 have higher limiting oxygen indices. The difference between Comparative Example 2 and the Examples is that no flame-retardant monomer was introduced, indicating the introduction of phosphate esters. When phosphate esters decompose upon heating, they generate substances such as phosphoric acid and metaphosphoric acid. These substances have strong dehydrating properties, promoting dehydration and carbonization of the polymer surface. After the char layer is formed, it can reduce the heat conduction between the flame and the polymer, while simultaneously isolating oxygen and inhibiting the combustion reaction. At the same time, the phosphorus and oxygen free radicals generated during decomposition can capture active free radicals such as hydrogen free radicals, interrupting the combustion chain reaction, thereby improving the flame retardancy of the material. A comparison of the experimental data from Examples 1, 2, 3 and Comparative Example 2 reveals that Examples 1, 2, and 3 have larger water contact angles. The difference between Comparative Example 2 and the Examples is that no flame-retardant monomer was introduced, indicating the introduction of trifluoromethyl groups. The high electronegativity of fluorine atoms in trifluoromethyl groups weakens the intermolecular forces, forming a low surface energy surface, making it difficult for liquids such as water and oil to wet the material surface, thus achieving a waterproof effect.

[0026] Test Example 2: Antibacterial test: Test method: The test was conducted according to GB / T20944.3-2008, with Escherichia coli and Staphylococcus aureus selected as the bacterial strains. The results are shown in Table 2.

[0027] Table 2

[0028] A comparison of the experimental data in Table 2 shows that the nanoparticle-modified antibacterial fabric prepared in this invention has good antibacterial ability.

[0029] A comparison of the experimental data of Examples 1, 2, 3 and Comparative Example 1 in Table 2 shows that Examples 1, 2, and 3 have higher antibacterial rates. The difference between Comparative Example 1 and the Examples is that no quaternary ammonium salt was introduced. This indicates that quaternary ammonium salt can be adsorbed onto the surface of bacterial cell membranes and attract negatively charged components on the cell membrane through electrostatic interactions, thereby changing the permeability of the cell membrane. It can also be embedded in the lipid bilayer of the bacterial cell membrane, interfering with the arrangement and fluidity of lipid molecules, causing damage to the cell membrane integrity, thereby achieving an antibacterial effect. A comparison of the experimental data from Examples 1, 2, 3 and Comparative Example 3 reveals that Examples 1, 2, and 3 exhibit higher repair rates. The difference between Comparative Example 3 and the Examples lies in the absence of a benzimidazole structure to complex with zinc ions. This indicates that when zinc ions are attracted by a negative charge to the bacteria, they bind to the functional groups within the bacteria, causing protein denaturation in the bacterial cells, which prevents them from properly catalyzing other reactions and thus affecting metabolism, ultimately leading to bacterial death and achieving an antibacterial effect.

[0030] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A nanoparticle-modified antibacterial fabric, characterized in that, The nanoparticle-modified antibacterial fabric is made by mixing modified polyester, modified graphene oxide, and zinc acetate, followed by melt spinning, yarn spinning, and weaving. The modified graphene oxide is prepared by reacting 5-amino-2-mercaptobenzimidazole with nano-graphene oxide. The modified polyester is prepared by first reacting triethyl phosphite with 1-(1-bromoethyl)-3,5-bis-trifluoromethyl-benzene, then polymerizing it with dimethyl terephthalate, polyethylene glycol-2000, ethylene glycol, and N-methyldiethanolamine, and finally reacting it with 3-bromopropionyl chloride.

2. A method for preparing a nanoparticle-modified antibacterial fabric, characterized in that, The preparation method of the nanoparticle-modified antibacterial fabric mainly includes the following preparation steps: (1) Mix 3-bromopropionyl chloride, ethanol, and pre-modified polyester at a mass ratio of 1:20~30:11~13, stir at 58~62℃ and 200~300r / min for 28~32min, add ethanol mixed solvent, continue stirring for 11.8~12.2h, filter, wash with anhydrous diethyl ether 8~10 times, and vacuum dry at -10~0℃ for 22~26h to obtain modified polyester; (2) Mix 5-amino-2-mercaptobenzimidazole, nano-graphene oxide and deionized water in a mass ratio of 5~7:2~3:20~30, sonicate for 28~32 min, heat to 88~92℃, stir at 200~300 r / min for 30~40 min, filter, and dry at 58~62℃ for 23~25 h to obtain modified graphene oxide; (3) Zinc acetate, modified polyester and modified graphene oxide are mixed evenly in a mass ratio of 0.3~0.4:6~8:1, stirred at 260~266℃ and 200~300r / min for 10~14min, melt-spun to obtain polyester fiber, and the polyester fiber is spun and woven to obtain nanoparticle modified antibacterial fabric.

3. The method for preparing a nanoparticle-modified antibacterial fabric according to claim 2, characterized in that, The mixed solvent in step (1) is prepared by mixing propanol and methanol at a volume ratio of 1:4.8~5.

2.

4. The method for preparing a nanoparticle-modified antibacterial fabric according to claim 2, characterized in that, The pre-modified polyester in step (1) is prepared by mixing dimethyl terephthalate, polyethylene glycol-2000, ethylene glycol, flame retardant monomer, N-methyldiethanolamine and zinc acetate in a mass ratio of 7~9:65~75:1.8~2.2:1.8~2.2:1.6~1.8:0.8~1.2, stirring at 176~184℃ and 200~300r / min for 3~4h, cooling to room temperature, and grinding to 4~6 mesh.

5. The method for preparing a nanoparticle-modified antibacterial fabric according to claim 4, characterized in that, The flame-retardant monomer is prepared by mixing triethyl phosphite and 1-(1-bromoethyl)-3,5-bis-trifluoromethyl-benzene in a molar ratio of 1:3.8~4.2 and stirring at 128~132℃ and 200~300 r / min for 5.8~6.2 h.

6. The method for preparing a nanoparticle-modified antibacterial fabric according to claim 2, characterized in that, The specific operation of melt spinning in step (3) is as follows: spinning temperature 256~258℃, extrusion rate 18~22r / min, winding rate 9~12r / min. The spun yarn is placed in a traction machine, stretched to 3~5 times at room temperature, then stretched to 8~10 times at 110~120℃, and set at 128~132℃ for 70~90s.

7. The method for preparing a nanoparticle-modified antibacterial fabric according to claim 2, characterized in that, The spinning process in step (3) refers to spinning using a FA320A high-speed drawing frame, a THC2015 fully automatic doffing roving frame, a TH598 spinning frame, and a GMR001 small winding machine in sequence. The drawing process uses 6 yarns combined and the draft ratio is 1.6 to 1.

8. The roving process has a back zone draft ratio of 1.1 to 1.3, a roving twist coefficient of 118 to 122, and a roving weight of 6 g / (10 m). The spinning process has a back zone draft ratio of 1.1 to 1.3, a spacer block size of 3.0 mm, and a spindle speed of 10,000 to 12,000 rpm.

Images