A graphene-based antibacterial knitted fabric

Abstract

The application discloses a kind of graphene-based antibacterial knitted fabric, the fabric is by grey cloth is treated by water bath, dyeing treatment, softening treatment, drying and shaping is obtained, the preparation raw material of the grey cloth includes according to weight fraction: 20-40 parts of nylon fiber, 10-15 parts of hemp fiber, 10-15 parts of cotton fiber and 5-8 parts of modified graphene oxide fiber;Wherein, the modified graphene oxide fiber is by graphene oxide fiber first by N-aminoethyl-3-aminopropyl methyl dimethoxysilane surface grafting modification treatment, then by long hair cane extract soaking treatment is obtained, so that the combination ability of fiber, chemical stability and biocompatibility are significantly improved, the structure and distribution of graphene are strengthened, at the same time, a large number of long hair cane bioactive ingredients are penetrated and locked in the fiber, so that the antibacterial and antioxidant properties of the fiber are significantly improved, so that the overall antibacterial effect of the fabric can still be efficiently maintained after multiple washing and use.

Description

Technical Field

[0001] The present invention relates to the technical field of fabric preparation, and in particular to a graphene-based antibacterial knitted fabric. Background Art

[0002] Graphene is an emerging material that has been widely studied in recent years. It is ultra-thin, has excellent conductivity, super hardness, and is light and soft. It has great application prospects in aerospace, weapons and equipment, major infrastructure, as well as new energy, new energy vehicles, energy conservation and environmental protection, and electronic information.

[0003] In addition, graphene materials also have certain antibacterial properties, which are mainly reflected in the following three ways: (1) When bacteria come into direct contact with graphene-based materials, the sharp sheets of graphene can pierce the bacterial cell membrane, causing the outflow of cell contents and killing the bacteria; (2) After graphene comes into direct contact with the bacterial cell membrane, it stimulates free radical reactions through charge transfer or the generation of ROS (reactive oxygen species), destroying the bacterial membrane structure and important biological macromolecules, leading to bacterial death; (3) Graphene nanosheets can be inserted into the bacterial cell membrane in a short period of time, extracting the phospholipid components therein, or directly spread on the cell membrane surface to trigger lipid molecule flipping, ultimately leading to bacterial lysis and death.

[0004] To this end, graphene materials can be applied to textile fabrics to enhance their antibacterial and anti-odor properties while maintaining their comfort and softness. However, existing graphene-based antibacterial fabrics have encountered a technical challenge during their development: their antibacterial properties significantly decrease after repeated washing and use. This is due to the fact that the washing process affects the structure and distribution of graphene, thereby reducing its antibacterial effect. Summary of the Invention

[0005] The object of the present invention is to provide an antibacterial knitted fabric based on graphene, which solves the problem that the antibacterial performance of existing graphene antibacterial fabrics is significantly reduced after repeated washing and use.

[0006] The present invention achieves the above-mentioned purpose through the following technical solutions:

[0007] A graphene-based antibacterial knitted fabric, the fabric being obtained by subjecting grey cloth to water bath treatment, dyeing treatment, softening treatment, and drying and shaping. The raw materials for preparing the grey cloth include, by weight, 20-40 parts of nylon fiber, 10-15 parts of hemp fiber, 10-15 parts of cotton fiber, and 5-8 parts of modified graphene oxide fiber.

[0008] The modified graphene oxide fiber is obtained by first subjecting the graphene oxide fiber to a surface grafting modification treatment with N-aminoethyl-3-aminopropylmethyldimethoxysilane and then soaking it in a strychnos nucifera extract.

[0009] A further improvement is that the water bath treatment refers to: immersing the blank in a water bath with a bath ratio of 1:5-8 and a temperature of 40-60° C. for 40-70 minutes, then taking it out and washing and drying it.

[0010] A further improvement is that the functional ingredients of the water bath liquid include: 4-6 g / L of tea saponin, 1-4 g / L of alkylphenol polyoxyethylene ether, 1-3 g / L of YZY-201 degreasing yarn agent and 0.5-1 g / L of silicone oil.

[0011] A further improvement is that the dyeing treatment refers to: immersing the blank in a dye solution with a bath ratio of 1:4-8 and a temperature of 100-120° C. for 20-30 minutes, then taking it out and washing and drying it.

[0012] A further improvement is that the softening treatment refers to: passing the grey cloth through a softening tank containing polyethylene emulsion at a speed of 15-22 m / min for softening finishing, and then taking it out and dehydrating it.

[0013] A further improvement is that the drying and shaping refers to: placing the blank in a drying box at a temperature of 50-70°C and drying it for 30-60s, then passing the blank through a shaping machine at a speed of 6-12m / min for stretching and shaping, and the shaping temperature is controlled at 100-150°C.

[0014] A further improvement is that the preparation method of the graphene oxide fiber is:

[0015] S1. Preparing a spinning solution: taking a graphene oxide solution, adjusting the pH to 6-10, and obtaining a spinning solution;

[0016] S2. Preparing fibrils: The spinning solution is passed through a 0.5-1 mm spinneret and injected into a coagulation bath at a rate of 0.2-1 mL / min, followed by drying to obtain fibrils;

[0017] S3, stretching and shaping: placing the raw fibers in a protective atmosphere furnace, controlling the temperature to 200-400° C., and applying tension to the raw fibers to make the fiber length stretching rate 28-32%;

[0018] S4. Reduction: Take the stretched and shaped original fibers, place them in a reducing agent for reduction for 1-5 hours, wash and dry them to obtain graphene oxide fibers.

[0019] A further improvement is that the reducing agent is selected from one of hydrazine hydrate, hydrobromic acid, sodium borohydride or hydroiodic acid.

[0020] A further improvement is that the surface grafting modification treatment of N-aminoethyl-3-aminopropylmethyldimethoxysilane comprises dispersing N-aminoethyl-3-aminopropylmethyldimethoxysilane in 4-8 times the mass of ethanol to obtain a dispersion, then immersing the graphene oxide fiber in the dispersion, ultrasonically oscillating for 40-60 minutes, and removing the graphene oxide fiber for washing and drying.

[0021] A further improvement is that the soaking treatment of the extract of the vine refers to: taking the dried vine stem of the vine, crushing it to 120-150 mesh, soaking it in 15-20 times the mass of 70% ethanol for 24-48 hours, then stirring and extracting it at 60-70°C for 100-150 minutes, filtering the residue to obtain the extract, immersing the graphene oxide fiber in the extract for 1-3 hours, taking out the graphene oxide fiber, washing and drying it.

[0022] The beneficial effects of the present invention are as follows: the modified graphene oxide fiber in the present invention has undergone surface grafting modification treatment with N-aminoethyl-3-aminopropylmethyldimethoxysilane, so that the amino group of N-aminoethyl-3-aminopropylmethyldimethoxysilane reacts with the functional groups (such as hydroxyl groups, carboxyl groups, etc.) on the fiber surface to form a stable chemical bond. At the same time, the silane group can also form a covalent bond with the carbon atoms on the fiber surface, thereby enhancing the grafting modification effect, significantly improving the binding ability, chemical stability and biocompatibility of the fiber, and strengthening the structure and distribution of graphene. The fiber is then soaked in a vine extract, so that a large amount of vine bioactive ingredients are infiltrated and locked into the fiber, thereby significantly improving the antibacterial and antioxidant properties of the fiber. In this way, the overall antibacterial effect of the fabric can still be efficiently maintained after multiple washings and uses. DETAILED DESCRIPTION

[0023] The present application is further described in detail below in conjunction with specific embodiments. It is necessary to point out here that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technical personnel in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0024] 1. Main Materials

[0025] (1) Graphene oxide solution: 100 g of graphite powder and 50 g of sodium nitrate were placed in a glass container, and 2.3 L of concentrated sulfuric acid was slowly added to the container. The mixture was stirred in an ice bath for 2.5 h. 600 g of potassium permanganate was weighed and slowly added to the container. The temperature was maintained at no more than 20 °C and the mixture was stirred for 1 h. The ice bath was then removed and the container was placed in a 35 °C water bath. The mixture was stirred for 2.5 h to obtain a dark brown paste. 4.8 L of hot water was added to the mixture and stirred. After the temperature reached 98 °C, the mixture was quickly transferred to a 98 °C hot water bath and stirred at a constant temperature for 5 min. The hot water bath was then removed and the mixture was transferred to an ordinary water bath and stirred for 30 min. 1.4 L of 50 °C deionized water and 1 L of 30% hydrogen peroxide, the reactant changes from brown to yellow, and after stirring for another 12 minutes, the reactant is taken out and filtered, and the filter cake is washed with 3% hydrochloric acid and centrifuged three times, and then redispersed in deionized water to obtain a brown suspension. After dialysis for 3 days, the graphene oxide solution is obtained.

[0026] (2) N-aminoethyl-3-aminopropylmethyldimethoxysilane: purchased from Nanjing Quanxi New Materials Co., Ltd.

[0027] (3) Dragon's beard vine: purchased from Guangdong Qingping medicinal materials market, identified by the School of Traditional Chinese Medicine of Guangdong Pharmaceutical University as the dried vine stem of Dragon's beard vine of the subgenus Thick disc of the genus Bauhinia of the Leguminosae family.

[0028] 2. Implementation of the Experiment

[0029] Example 1

[0030] A graphene-based antibacterial knitted fabric is prepared by water-bathing, dyeing, softening, and drying to set the fabric. The raw materials for preparing the fabric include, by weight, 20 parts nylon fiber, 10 parts hemp fiber, 10 parts cotton fiber, and 5 parts modified graphene oxide fiber. The specific preparation steps are as follows:

[0031] Step 1: Preparation of graphene oxide fibers

[0032] S1. Preparing a spinning solution: taking a graphene oxide solution, adjusting the pH to 6, and obtaining a spinning solution;

[0033] S2. Preparing fibrils: The spinning solution is passed through a 0.5 mm spinneret and injected into a coagulation bath at a rate of 0.2 mL / min, followed by drying to obtain fibrils;

[0034] S3, stretching and shaping: placing the raw fibers in a nitrogen protective atmosphere furnace, controlling the temperature to 200° C., and applying tension to the raw fibers to make the fiber length stretching rate reach 28%;

[0035] S4. Reduction: Take the stretched and shaped original fibers, place them in a hydrazine hydrate reducing agent for reduction for 1 hour, wash and dry them to obtain graphene oxide fibers.

[0036] Step 2: Modification of graphene oxide fibers

[0037] S1. Disperse N-aminoethyl-3-aminopropylmethyldimethoxysilane in 4 times the mass of ethanol to obtain a dispersion, then immerse the graphene oxide fiber in the dispersion (the fiber accounts for 1 / 5 of the mass of the dispersion, the same below), ultrasonically vibrate for 40 minutes, remove the graphene oxide fiber, wash, and dry;

[0038] S2. Take the dried stems of Glechoma obtusifolia, crush them into 120 mesh, soak them in 15 times the mass of 70% ethanol for 24 hours, then stir and extract them at 60°C for 150 minutes, filter the residue to obtain the extract, immerse the graphene oxide fiber in the extract for 1 hour (the fiber accounts for 1 / 5 of the mass of the extract, the same below), take out the graphene oxide fiber, wash and dry it.

[0039] Step 3: Weaving

[0040] Nylon fiber, hemp fiber, cotton fiber, and modified graphene oxide fiber are placed on the winding machine head, and the winding machine is started at a speed of 80 revolutions per second. The fibers are wound together to obtain mixed silk threads, and then the mixed silk threads are woven into knitted fabrics with a warp density of 200 yarns / 10cm and a weft density of 180 yarns / 10cm, i.e., grey cloth.

[0041] Step 4: Processing of grey fabric

[0042] S1. Water bath treatment: Soak the blank in a water bath with a bath ratio of 1:5 and a temperature of 40°C for 70 minutes, then remove and rinse and dry. The water bath is mainly water, and the functional ingredients include: 4g / L tea saponin, 1g / L alkylphenol polyoxyethylene ether, 1g / L YZY-201 degreasing agent, and 0.5g / L silicone oil;

[0043] S2, dyeing treatment: soak the blank in a dye solution with a bath ratio of 1:4 and a temperature of 100°C for 30 minutes, then take it out and wash and dry it;

[0044] S3, softening treatment: the grey fabric is passed through a softening tank containing polyethylene emulsion at a speed of 15m / min for softening finishing, then taken out and dehydrated;

[0045] S4. Drying and shaping: Place the blank in a drying oven at a temperature of 50°C and dry it for 60 seconds. Then, pass the blank through a shaping machine at a speed of 6m / min for stretching and shaping, and the shaping temperature is controlled at 100°C.

[0046] Example 2

[0047] A graphene-based antibacterial knitted fabric is prepared by water-bathing, dyeing, softening, and drying to set the fabric. The raw materials for preparing the fabric include, by weight, 30 parts nylon fiber, 12 parts hemp fiber, 12 parts cotton fiber, and 6 parts modified graphene oxide fiber. The specific preparation steps are as follows:

[0048] Step 1: Preparation of graphene oxide fibers

[0049] S1. Preparing a spinning solution: taking a graphene oxide solution, adjusting the pH to 8, and obtaining a spinning solution;

[0050] S2. Preparing fibrils: The spinning solution is passed through a 0.8 mm spinneret and injected into a coagulation bath at a rate of 0.6 mL / min, followed by drying to obtain fibrils;

[0051] S3, stretching and shaping: placing the original fiber in an argon protective atmosphere furnace, controlling the temperature to 300° C., and applying tension to the original fiber to make the fiber length stretching rate reach 30%;

[0052] S4. Reduction: The original fibers after stretching and shaping are placed in a hydrobromic acid reducing agent for reduction for 3 hours, washed and dried to obtain graphene oxide fibers.

[0053] Step 2: Modification of graphene oxide fibers

[0054] S1. Dispersing N-aminoethyl-3-aminopropylmethyldimethoxysilane in 6 times the mass of ethanol to obtain a dispersion, then immersing the graphene oxide fiber in the dispersion, ultrasonically vibrating for 50 minutes, taking out the graphene oxide fiber, washing, and drying;

[0055] S2. Take the dried stems of Glechoma obtusifolia, crush them into 140 mesh, soak them in 70% ethanol (18 times the mass) for 36 hours, then stir and extract them at 65°C for 120 minutes, filter the residue to obtain the extract, immerse the graphene oxide fiber in the extract for 2 hours, take out the graphene oxide fiber, wash it, and dry it.

[0056] Step 3: Weaving

[0057] Nylon fiber, hemp fiber, cotton fiber, and modified graphene oxide fiber are placed on the winding machine head, and the winding machine is started at a speed of 80 revolutions per second. The fibers are wound together to obtain mixed silk threads, and then the mixed silk threads are woven into knitted fabrics with a warp density of 200 yarns / 10cm and a weft density of 180 yarns / 10cm, i.e., grey cloth.

[0058] Step 4: Processing of grey fabric

[0059] S1. Water bath treatment: Soak the blank in a water bath with a bath ratio of 1:6 and a temperature of 50°C for 60 minutes, then remove and rinse and dry. The water bath is mainly water, and the functional ingredients include: 5g / L tea saponin, 2g / L alkylphenol polyoxyethylene ether, 2g / L YZY-201 degreasing agent, and 0.8g / L silicone oil;

[0060] S2, dyeing treatment: soak the blank in a dye solution with a bath ratio of 1:6 and a temperature of 110°C for 25 minutes, then take it out and wash and dry it;

[0061] S3, softening treatment: the grey fabric is passed through a softening tank containing polyethylene emulsion at a speed of 20m / min for softening finishing, then taken out and dehydrated;

[0062] S4. Drying and shaping: Place the blank in a drying oven at 60°C and dry for 45 seconds. Then pass the blank through a shaping machine at a speed of 8m / min for stretching and shaping, and the shaping temperature is controlled at 120°C.

[0063] Example 3

[0064] A graphene-based antibacterial knitted fabric is prepared by water-bathing, dyeing, softening, and drying to set the fabric. The raw materials for preparing the fabric include, by weight, 40 parts nylon fiber, 15 parts hemp fiber, 15 parts cotton fiber, and 8 parts modified graphene oxide fiber. The specific preparation steps are as follows:

[0065] Step 1: Preparation of graphene oxide fibers

[0066] S1. Preparing a spinning solution: taking a graphene oxide solution, adjusting the pH to 10, and obtaining a spinning solution;

[0067] S2. Preparing fibrils: The spinning solution is passed through a 1 mm spinneret and injected into a coagulation bath at a rate of 1 mL / min, followed by drying to obtain fibrils;

[0068] S3, stretching and shaping: placing the raw fibers in a nitrogen protective atmosphere furnace, controlling the temperature to 400° C., and applying tension to the raw fibers to make the fiber length stretching rate reach 32%;

[0069] S4. Reduction: The original fibers after stretching and shaping are placed in a sodium borohydride reducing agent for reduction for 5 hours, washed and dried to obtain graphene oxide fibers.

[0070] Step 2: Modification of graphene oxide fibers

[0071] S1. Dispersing N-aminoethyl-3-aminopropylmethyldimethoxysilane in 8 times the mass of ethanol to obtain a dispersion, then immersing the graphene oxide fiber in the dispersion, ultrasonically vibrating for 60 minutes, taking out the graphene oxide fiber, washing, and drying;

[0072] S2. Take the dried stems of Glechoma obtusifolia, crush them into 150 mesh, soak them in 20 times the mass of 70% ethanol for 48 hours, then stir and extract them at 70°C for 100 minutes, filter the residue to obtain the extract, immerse the graphene oxide fiber in the extract for 3 hours, take out the graphene oxide fiber, wash it, and dry it.

[0073] Step 3: Weaving

[0074] Nylon fiber, hemp fiber, cotton fiber, and modified graphene oxide fiber are placed on the winding machine head, and the winding machine is started at a speed of 80 revolutions per second. The fibers are wound together to obtain mixed silk threads, and then the mixed silk threads are woven into knitted fabrics with a warp density of 200 yarns / 10cm and a weft density of 180 yarns / 10cm, i.e., grey cloth.

[0075] Step 4: Processing of grey fabric

[0076] S1. Water bath treatment: Soak the blank in a water bath with a bath ratio of 1:8 and a temperature of 60°C for 40 minutes, then remove and rinse and dry. The water bath is mainly water, and the functional ingredients include: 6g / L tea saponin, 4g / L alkylphenol polyoxyethylene ether, 3g / L YZY-201 degreasing agent, and 1g / L silicone oil;

[0077] S2, dyeing treatment: soak the blank in a dye solution with a bath ratio of 1:8 and a temperature of 120°C for 20 minutes, then take it out and wash and dry it;

[0078] S3, softening treatment: the grey fabric is passed through a softening tank containing polyethylene emulsion at a speed of 22m / min for softening finishing, then taken out and dehydrated;

[0079] S4. Drying and shaping: Place the blank in a drying oven at a temperature of 70°C and dry for 30 seconds. Then, pass the blank through a shaping machine at a speed of 12m / min for stretching and shaping, and the shaping temperature is controlled at 150°C.

[0080] Comparative Example 1

[0081] A graphene-based antibacterial knitted fabric is prepared by water-bathing, dyeing, softening, and drying to set the fabric. The raw materials for preparing the fabric include, by weight, 30 parts nylon fiber, 12 parts hemp fiber, 12 parts cotton fiber, and 6 parts modified graphene oxide fiber. The specific preparation steps are as follows:

[0082] Step 1: Preparation of graphene oxide fibers

[0083] S1. Preparing a spinning solution: taking a graphene oxide solution, adjusting the pH to 8, and obtaining a spinning solution;

[0084] S2. Preparing fibrils: The spinning solution is passed through a 0.8 mm spinneret and injected into a coagulation bath at a rate of 0.6 mL / min, followed by drying to obtain fibrils;

[0085] S3, stretching and shaping: placing the original fiber in an argon protective atmosphere furnace, controlling the temperature to 300° C., and applying tension to the original fiber to make the fiber length stretching rate reach 30%;

[0086] S4. Reduction: The original fibers after stretching and shaping are placed in a hydrobromic acid reducing agent for reduction for 3 hours, washed and dried to obtain graphene oxide fibers.

[0087] Step 2: Modification of graphene oxide fibers

[0088] S1. Take the dried stems of Glechoma obtusifolia, crush them into 140 mesh, soak them in 18 times the mass of 70% ethanol for 36 hours, then stir and extract them at 65°C for 120 minutes, filter the residue to obtain the extract, immerse the graphene oxide fiber in the extract for 2 hours, take out the graphene oxide fiber, wash it, and dry it.

[0089] Step 3: Weaving

[0090] Nylon fiber, hemp fiber, cotton fiber, and modified graphene oxide fiber are placed on the winding machine head, and the winding machine is started at a speed of 80 revolutions per second. The fibers are wound together to obtain mixed silk threads, and then the mixed silk threads are woven into knitted fabrics with a warp density of 200 yarns / 10cm and a weft density of 180 yarns / 10cm, i.e., grey cloth.

[0091] Step 4: Processing of grey fabric

[0092] Water bath treatment: Soak the blank in a water bath with a bath ratio of 1:6 and a temperature of 50°C for 60 minutes, then remove and rinse and dry. The water bath is mainly water and contains the following functional ingredients: 5g / L tea saponin, 2g / L alkylphenol polyoxyethylene ether, 2g / L YZY-201 degreasing agent, and 0.8g / L silicone oil.

[0093] S2, dyeing treatment: soak the blank in a dye solution with a bath ratio of 1:6 and a temperature of 110°C for 25 minutes, then take it out and wash and dry it;

[0094] S3, softening treatment: the grey fabric is passed through a softening tank containing polyethylene emulsion at a speed of 20m / min for softening finishing, then taken out and dehydrated;

[0095] S4. Drying and shaping: Place the blank in a drying oven at 60°C and dry for 45 seconds. Then pass the blank through a shaping machine at a speed of 8m / min for stretching and shaping, and the shaping temperature is controlled at 120°C.

[0096] Comparative Example 2

[0097] A graphene-based antibacterial knitted fabric is prepared by water-bathing, dyeing, softening, and drying to set the fabric. The raw materials for preparing the fabric include, by weight, 30 parts nylon fiber, 12 parts hemp fiber, 12 parts cotton fiber, and 6 parts modified graphene oxide fiber. The specific preparation steps are as follows:

[0098] Step 1: Preparation of graphene oxide fibers

[0099] S1. Preparing a spinning solution: taking a graphene oxide solution, adjusting the pH to 8, and obtaining a spinning solution;

[0100] S2. Preparing fibrils: The spinning solution is passed through a 0.8 mm spinneret and injected into a coagulation bath at a rate of 0.6 mL / min, followed by drying to obtain fibrils;

[0101] S3, stretching and shaping: placing the original fiber in an argon protective atmosphere furnace, controlling the temperature to 300° C., and applying tension to the original fiber to make the fiber length stretching rate reach 30%;

[0102] S4. Reduction: The original fibers after stretching and shaping are placed in a hydrobromic acid reducing agent for reduction for 3 hours, washed and dried to obtain graphene oxide fibers.

[0103] Step 2: Modification of graphene oxide fibers

[0104] N-aminoethyl-3-aminopropylmethyldimethoxysilane was dispersed in 6 times the mass of ethanol to obtain a dispersion, and then graphene oxide fiber was immersed in the dispersion and ultrasonically vibrated for 50 minutes. The graphene oxide fiber was taken out, washed, and dried.

[0105] Step 3: Weaving

[0106] Nylon fiber, hemp fiber, cotton fiber, and modified graphene oxide fiber are placed on the winding machine head, and the winding machine is started at a speed of 80 revolutions per second. The fibers are wound together to obtain mixed silk threads, and then the mixed silk threads are woven into knitted fabrics with a warp density of 200 yarns / 10cm and a weft density of 180 yarns / 10cm, i.e., grey cloth.

[0107] Step 4: Processing of grey fabric

[0108] S1. Water bath treatment: Soak the blank in a water bath with a bath ratio of 1:6 and a temperature of 50°C for 60 minutes, then remove and rinse and dry. The water bath is mainly water, and the functional ingredients include: 5g / L tea saponin, 2g / L alkylphenol polyoxyethylene ether, 2g / L YZY-201 degreasing agent, and 0.8g / L silicone oil;

[0109] S2, dyeing treatment: soak the blank in a dye solution with a bath ratio of 1:6 and a temperature of 110°C for 25 minutes, then take it out and wash and dry it;

[0110] S3, softening treatment: the grey fabric is passed through a softening tank containing polyethylene emulsion at a speed of 20m / min for softening finishing, then taken out and dehydrated;

[0111] S4. Drying and shaping: Place the blank in a drying oven at 60°C and dry for 45 seconds. Then pass the blank through a shaping machine at a speed of 8m / min for stretching and shaping, and the shaping temperature is controlled at 120°C.

[0112] 3. Antibacterial performance test

[0113] (1) The antibacterial knitted fabrics prepared in Examples 1-3 and Comparative Examples 1-2 were cut into 10 cm × 10 cm samples. The antibacterial rate of these fabric samples was tested in accordance with GB / T 20944.2-2007 "Evaluation of Antibacterial Properties of Textiles Part 2: Absorption Method". The test results are summarized in Table 1 below.

[0114] (2) The antibacterial knitted fabrics prepared in Examples 1-3 and Comparative Examples 1-2 were cut into 10 cm × 10 cm samples. After washing 50 times, the antibacterial rate of these fabric samples was tested again in accordance with the provisions of GB / T 20944-2007 "Evaluation of Antibacterial Properties of Textiles". The test results are statistically obtained in Table 2 below.

[0115] 4. Results Analysis

[0116] Table 1: Antibacterial rate results of each fabric sample before washing

[0117]

[0118] Table 2: Antibacterial rate results of each fabric sample after washing 50 times

[0119]

[0120] As can be seen from Tables 1 and 2 above, the antibacterial knitted fabrics prepared in Examples 1-3 of the present invention have outstanding antibacterial effects before washing, and the antibacterial effects do not decrease significantly after 50 washes. However, since Comparative Example 1 did not undergo surface grafting modification with N-aminoethyl-3-aminopropylmethyldimethoxysilane, the antibacterial effect before washing decreased somewhat, and the antibacterial effect decreased significantly after 50 washes. Since Comparative Example 2 did not undergo soaking in the extract of the vine, the antibacterial effect before washing further decreased, and the antibacterial effect also decreased significantly after 50 washes. This demonstrates that both the surface grafting modification with N-aminoethyl-3-aminopropylmethyldimethoxysilane and the soaking in the vine extract are indispensable, and their synergistic effect is necessary to maintain the antibacterial effect of the fabric over a long period of time.

[0121] The above-described embodiments merely illustrate several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, and all such variations and improvements fall within the scope of protection of the present invention.

Claims

1. A graphene-based antibacterial knitted fabric, characterized in that: The fabric is obtained by water-bath treatment, dyeing treatment, softening treatment, drying and shaping of grey cloth, and the grey cloth is woven from nylon fiber, hemp fiber, cotton fiber and modified graphene oxide fiber, and the raw materials for preparation include, by weight, 20-40 parts of nylon fiber, 10-15 parts of hemp fiber, 10-15 parts of cotton fiber and 5-8 parts of modified graphene oxide fiber; The modified graphene oxide fiber is obtained by first subjecting the graphene oxide fiber to a surface grafting modification treatment with N-(2-aminoethyl)-3-aminopropylmethyldimethoxysilane and then soaking it in a vine extract. The preparation method of the graphene oxide fiber is: S1. Preparing a spinning solution: taking a graphene oxide solution, adjusting the pH to 6-10, and obtaining a spinning solution; S2. Preparing fibrils: The spinning solution is passed through a 0.5-1 mm spinneret and injected into a coagulation bath at a rate of 0.2-1 mL / min, followed by drying to obtain fibrils; S3, stretching and shaping: placing the raw fibers in a protective atmosphere furnace, controlling the temperature to 200-400° C., and applying tension to the raw fibers to make the fiber length stretching rate reach 28-32%; S4, reduction: taking the stretched and shaped original fibers, placing them in a reducing agent for reduction for 1-5 hours, washing and drying, thereby obtaining graphene oxide fibers; The soaking treatment of the extract of the vine refers to: taking the dried vine stem of the vine, crushing it into 120-150 mesh, soaking it in 70% ethanol with a mass of 15-20 times, and then stirring and extracting it at 60-70 ° C for 100-150 minutes, filtering the residue to obtain the extract, immersing the graphene oxide fiber in the extract for 1-3 hours, taking out the graphene oxide fiber, washing it, and drying it.

2. The graphene-based antibacterial knitted fabric according to claim 1, characterized in that: The water bath treatment refers to: immersing the blank in a water bath with a bath ratio of 1:5-8 and a temperature of 40-60° C. for 40-70 minutes, then taking it out and washing and drying it.

3. The graphene-based antibacterial knitted fabric according to claim 2, characterized in that: The functional components of the water bath liquid include: 4-6 g / L of tea saponin, 1-4 g / L of alkylphenol polyoxyethylene ether, 1-3 g / L of YZY-201 degreasing yarn agent and 0.5-1 g / L of silicone oil.

4. The graphene-based antibacterial knitted fabric according to claim 1, characterized in that: The dyeing treatment refers to: immersing the blank in a dye solution with a bath ratio of 1:4-8 and a temperature of 100-120° C. for 20-30 minutes, then taking it out and washing and drying it.

5. The graphene-based antibacterial knitted fabric according to claim 1, characterized in that: The softening treatment refers to: passing the grey cloth through a softening tank containing polyethylene emulsion at a speed of 15-22 m / min for softening finishing, and then taking it out and dehydrating it.

6. The graphene-based antibacterial knitted fabric according to claim 1, characterized in that: The drying and shaping refers to: placing the blank in a drying box at a temperature of 50-70°C and drying it for 30-60s, then passing the blank through a shaping machine at a speed of 6-12m / min for stretching and shaping, and the shaping temperature is controlled at 100-150°C.

7. The graphene-based antibacterial knitted fabric according to claim 1, characterized in that: The reducing agent is selected from one of hydrazine hydrate, hydrobromic acid, sodium borohydride or hydroiodic acid.

8. The graphene-based antibacterial knitted fabric according to claim 1, characterized in that: The surface grafting modification treatment of N-(2-aminoethyl)-3-aminopropylmethyldimethoxysilane comprises dispersing N-(2-aminoethyl)-3-aminopropylmethyldimethoxysilane in 4-8 times the mass of ethanol to obtain a dispersion, immersing the graphene oxide fiber in the dispersion, ultrasonically oscillating for 40-60 minutes, and then removing the graphene oxide fiber, washing, and drying.

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