Antibacterial moisturizing cotton fiber fabric and preparation method thereof

Abstract

The invention relates to an antibacterial moisturizing cotton fiber fabric and a preparation method thereof.The preparation method comprises the following steps that S1, cinnamomum camphora essential oil, hyaluronic acid and sorbitan monooleate are added into soybean oil and mixed to be uniform, and an inner oil phase solution is obtained; adding N-(hydroxymethyl) acrylamide into soybean oil, and uniformly mixing to obtain an outer oil phase solution; preparing a multiphase emulsion by taking the inner oil phase solution, water and the outer oil phase solution as raw materials and adopting a microfluidic method; s2, introducing the multiphase emulsion into a calcium chloride aqueous solution, washing and drying to obtain microcapsules; s3, gray fabric made of cotton fibers is placed in a persulfate aqueous solution, microcapsules are added into the persulfate aqueous solution for a graft copolymerization reaction, mangling and baking are carried out, and the antibacterial and moisturizing cotton fiber fabric is prepared. Cinnamomum camphora essential oil and hyaluronic acid are introduced into cotton fibers in a chemical combination mode, so that the combination strength of the Cinnamomum camphora essential oil and hyaluronic acid with the cotton fibers is improved, and the durability of the antibacterial effect and the moisturizing effect is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of textiles, and in particular relates to an antibacterial and moisturizing cotton fiber fabric and a preparation method thereof. Background Art

[0002] Cotton fiber is a seed fiber formed by the elongation and thickening of the epidermal cells of the fertilized ovule. Unlike general bast fiber, the main component of cotton fiber is cellulose. In addition, cotton fiber also contains a large amount of pentosan, wax, protein, fat, water-soluble substances, ash and other accompanying substances. Cotton fiber is an important raw material for the textile industry. It has the advantages of high strength, good air permeability, strong hygroscopicity, good affinity for dyes, easy dyeing, bright color, good heat resistance, and alkali resistance. Cotton fiber is usually made into pure cotton fabrics by pure spinning technology or blended and interwoven with viscose fiber, polyester fiber and other fibers to make blended and interwoven fabrics. It is widely used in the production of clothing, home textiles, etc.

[0003] However, cotton fiber fabrics are easily adhered to secretions such as sweat and sebum during wearing. These secretions are easy to breed bacteria and other microorganisms, causing mildew and odor, and the user experience is not good.

[0004] In order to give cotton fiber fabrics antibacterial properties, people have tried to make natural plant antibacterial agents into finishing liquids and post-finish the grey cloth made of cotton fibers. However, when using this production method, the natural plant antibacterial agents will fall off during daily use with water washing, and the antibacterial durability is poor. Summary of the invention

[0005] In view of this, the purpose of the present invention is to provide an antibacterial and moisturizing cotton fiber fabric and a preparation method thereof, so as to solve the technical problems that the above-mentioned natural plant antibacterial agent will fall off with washing during daily use and has poor antibacterial durability.

[0006] To achieve the above-mentioned object of the invention, the technical solution of the present invention is as follows:

[0007] In a first aspect, the present application provides a method for preparing an antibacterial and moisturizing cotton fiber fabric, the preparation method comprising the following steps:

[0008] S1. Add camphor essential oil, hyaluronic acid and sorbitan monooleate to soybean oil and mix well to obtain an inner oil phase solution;

[0009] Adding N-(hydroxymethyl)acrylamide to soybean oil and mixing well to obtain an external oil phase solution;

[0010] Using inner oil phase solution, water and outer oil phase solution as raw materials, a multiphase emulsion is prepared by a microfluidic method;

[0011] S2. The multiphase emulsion is passed into an aqueous solution of calcium chloride, washed, and dried to obtain microcapsules;

[0012] S3. placing the cotton fiber blank in a persulfate aqueous solution, adding the microcapsules into the persulfate aqueous solution to carry out a graft copolymerization reaction, squeezing the liquid, and baking to obtain the antibacterial and moisturizing cotton fiber fabric.

[0013] Optionally, in step S1, the mass ratio of the camphor essential oil to hyaluronic acid is 2-5:3-7, preferably 3-5:3-7.

[0014] Optionally, in step S1, the mass ratio of sorbitan monooleate to hyaluronic acid is 0.1-0.3:3-7, preferably 0.15-0.3:3-7.

[0015] Optionally, in step S1, the mass ratio of N-(hydroxymethyl)acrylamide to hyaluronic acid is 1-4:3-7, preferably 2-4:3-7.

[0016] Optionally, in the inner oil phase solution of step S1, the concentration of the camphor essential oil is 20-50 g / L, preferably 25-50 g / L.

[0017] Optionally, in the external oil phase solution of step S1, the concentration of N-(hydroxymethyl)acrylamide is 10-40 g / L, preferably 15-40 g / L.

[0018] Optionally, in step S1, during the preparation of the multiphase emulsion, the flow rate of the inner oil phase solution is 2-6 μL / min, preferably 3-6 μL / min.

[0019] Optionally, in step S1, during the preparation of the multiphase emulsion, the flow rate of water is 7-11 μL / min, preferably 8-11 μL / min.

[0020] Optionally, in step S1, during the preparation of the multiphase emulsion, the flow rate of the external oil phase solution is 20-30 μL / min, preferably 24-30 μL / min.

[0021] Optionally, the external oil phase solution in step S1 further contains dioctyl phthalate.

[0022] Optionally, in step S1, the mass ratio of dioctyl phthalate to N-(hydroxymethyl)acrylamide is 0.8-1.5:1-4, preferably 0.9-1.5:1-4.

[0023] Optionally, the external oil phase solution in step S1 further contains triethylene glycol diacrylate.

[0024] Optionally, in step S1, the mass ratio of triethylene glycol diacrylate to N-(hydroxymethyl)acrylamide is 1-2:1-4, preferably 1.5-2:1-4.

[0025] Optionally, in step S2, the concentration of the calcium chloride aqueous solution is 2wt%-6wt%, preferably 3wt%-6wt%.

[0026] Optionally, in step S2, the drying temperature is 25-35°C, preferably 30-35°C; the drying time is 3-4h, preferably 3.5-4h.

[0027] Optionally, in step S3, the mass ratio of the grey cloth to the persulfate aqueous solution is 1:10-15, preferably 1:12-15.

[0028] Optionally, in step S3, the mass ratio of the persulfate to the microcapsules is 1:4-7, preferably 1:5-7.

[0029] Optionally, in step S3, the temperature of the graft copolymerization reaction is 55-65°C, preferably 60-65°C; the duration of the graft copolymerization reaction is 10-20 min, preferably 15-20 min.

[0030] Optionally, in step S3, during the squeezing process, the squeezing rate is 65wt%-70wt%, preferably 67%-70%.

[0031] Optionally, in step S3, the baking temperature is 60-70°C, preferably 65-70°C; the baking time is 5-8 min, preferably 6-8 min.

[0032] In a second aspect, the present application provides an antibacterial and moisturizing cotton fiber fabric prepared according to the method described above.

[0033] As described above, the antibacterial and moisturizing cotton fiber fabric and the preparation method thereof of the present invention have the following beneficial effects:

[0034] In the present invention, camphor essential oil with antibacterial effect and hyaluronic acid with moisturizing effect are prepared into an inner oil phase solution; N-(hydroxymethyl) acrylamide capable of undergoing graft copolymerization reaction with cotton fiber is prepared into an outer oil phase solution; a multiphase emulsion is prepared by a microfluidic method using the inner oil phase solution, water and the outer oil phase solution as raw materials; the multiphase emulsion is prepared into microcapsules; then persulfate is used as an initiator and N-(hydroxymethyl) acrylamide contained in the outer wall of the microcapsule is used as a grafting monomer to undergo graft copolymerization reaction with cotton fiber; the microcapsules are grafted onto the cotton fiber, that is, the camphor essential oil with antibacterial effect and the hyaluronic acid with moisturizing effect are introduced into the cotton fiber by chemical bonding, thereby improving the bonding strength between the camphor essential oil and the hyaluronic acid and the cotton fiber, thereby improving the durability of the antibacterial effect and the moisturizing effect of the fabric.

[0035] In the present invention, dioctyl phthalate can increase the mechanical strength of the formed microcapsules, thereby further improving the antibacterial efficacy and the durability of the efficacy effect.

[0036] In the present invention, triethylene glycol diacrylate can promote more N-(hydroxymethyl) acrylamide to be grafted onto cotton fibers, thereby grafting more microcapsules onto the cotton fibers, further improving the antibacterial effect and moisturizing effect of the fabric. DETAILED DESCRIPTION

[0037] The present invention is further described below through specific examples, but it should be pointed out that the specific material ratios, process conditions and results described in the embodiments of the present invention are only used to illustrate the present invention and cannot be used to limit the scope of protection of the present invention. All equivalent changes or modifications made according to the spirit of the present invention should be included in the scope of protection of the present invention.

[0038] An embodiment of the present application provides a method for preparing an antibacterial and moisturizing cotton fiber fabric, comprising the following steps:

[0039] S1. Add camphor essential oil, hyaluronic acid and sorbitan monooleate to soybean oil, mix well, and obtain an inner oil phase solution with a concentration of 20-50 g / L of camphor essential oil, a mass ratio of camphor essential oil to hyaluronic acid of 2-5:3-7, and a mass ratio of sorbitan monooleate to hyaluronic acid of 0.1-0.3:3-7;

[0040] Adding N-(hydroxymethyl)acrylamide to soybean oil and mixing evenly to obtain an external oil phase solution having a concentration of 10-40 g / L of N-(hydroxymethyl)acrylamide;

[0041] An inner oil phase solution, water and an outer oil phase solution are used as raw materials, and a multiphase emulsion is prepared by a microfluidic method according to a flow rate of 2-6 μL / min for the inner oil phase solution, a flow rate of 7-11 μL / min for the water and a flow rate of 20-30 μL / min for the outer oil phase solution, wherein the mass ratio of N-(hydroxymethyl)acrylamide to hyaluronic acid is 1-4:3-7;

[0042] S2. The multiphase emulsion is passed into a 2wt% -6wt% aqueous solution of calcium chloride, washed, and dried at 25-35 ° C for 3-4h to obtain microcapsules;

[0043] S3. Place the cotton fiber blank in a persulfate aqueous solution with a mass of 10-15 times the mass of the cotton fiber blank, add microcapsules to the persulfate aqueous solution to carry out graft copolymerization reaction at a temperature of 55-65°C for 10-20 minutes, squeeze out the liquid with a squeeze out rate of 65wt%-70wt%, and bake at a temperature of 60-70°C for 5-8 minutes to obtain an antibacterial and moisturizing cotton fiber fabric, wherein the mass ratio of persulfate to microcapsules is 1:4-7.

[0044] In another embodiment of the present application, the external oil phase solution in step S1 further contains dioctyl phthalate, and the mass ratio of dioctyl phthalate to N-(hydroxymethyl)acrylamide is 0.8-1.5:1-4.

[0045] In another embodiment of the present application, the external oil phase solution in step S1 further contains triethylene glycol diacrylate, and the mass ratio of triethylene glycol diacrylate to N-(hydroxymethyl)acrylamide is 1-2:1-4.

[0046] One embodiment of the present application provides an antibacterial and moisturizing cotton fiber fabric prepared according to the method described above.

[0047] The present invention is described in detail below by specific examples. It should also be understood that the following examples are only used to specifically illustrate the present invention and cannot be understood as limiting the scope of protection of the present invention. Some non-essential improvements and adjustments made by those skilled in the art based on the above content of the present invention belong to the scope of protection of the present invention. The specific process parameters and the like in the following examples are also only examples within a suitable range, that is, those skilled in the art can make a selection within a suitable range through the description herein, and are not limited to the specific values ​​​​exemplified below.

[0048] Example 1

[0049] A method for preparing an antibacterial and moisturizing cotton fiber fabric, the specific steps are as follows:

[0050] S1. Add camphor essential oil, hyaluronic acid and sorbitan monooleate to soybean oil, mix well, and obtain an inner oil phase solution with a concentration of 20 g / L of camphor essential oil, a mass ratio of camphor essential oil to hyaluronic acid of 5:3, and a mass ratio of sorbitan monooleate to hyaluronic acid of 0.3:3;

[0051] Adding N-(hydroxymethyl)acrylamide to soybean oil and mixing well to obtain an external oil phase solution having a concentration of 40 g / L of N-(hydroxymethyl)acrylamide;

[0052] With water as the intermediate phase, inner oil phase solution, water and outer oil phase solution as raw materials, a multiphase emulsion was prepared by a microfluidic method according to the flow rate of the inner oil phase solution of 2 μL / min, the flow rate of water of 7 μL / min and the flow rate of the outer oil phase solution of 30 μL / min, and the mass ratio of N-(hydroxymethyl)acrylamide to hyaluronic acid was 4:3;

[0053] S2. The multiphase emulsion was passed into a 6wt% aqueous solution of calcium chloride, washed, and dried at 25°C for 4h to obtain microcapsules;

[0054] S3. Place the cotton fiber blank in a sodium persulfate aqueous solution 15 times its mass, add microcapsules to the persulfate aqueous solution, heat to 55°C, and keep it at 55°C for 20 minutes to carry out graft copolymerization reaction, squeeze out the liquid, the squeezing rate is 70wt%, and bake at 70°C for 5 minutes to obtain antibacterial and moisturizing cotton fiber fabrics, the mass ratio of sodium persulfate to microcapsules is 1:7.

[0055] Example 2

[0056] A method for preparing an antibacterial and moisturizing cotton fiber fabric, the specific steps are as follows:

[0057] S1. Add camphor essential oil, hyaluronic acid and sorbitan monooleate to soybean oil, mix well, and obtain an inner oil phase solution with a concentration of 50 g / L of camphor essential oil, a mass ratio of camphor essential oil to hyaluronic acid of 2:7, and a mass ratio of sorbitan monooleate to hyaluronic acid of 0.1:7;

[0058] Adding N-(hydroxymethyl)acrylamide to soybean oil and mixing well to obtain an external oil phase solution having a concentration of 10 g / L of N-(hydroxymethyl)acrylamide;

[0059] With water as the intermediate phase, inner oil phase solution, water and outer oil phase solution as raw materials, a multiphase emulsion was prepared by a microfluidic method according to the flow rate of the inner oil phase solution of 6 μL / min, the flow rate of water of 11 μL / min and the flow rate of the outer oil phase solution of 20 μL / min, and the mass ratio of N-(hydroxymethyl)acrylamide to hyaluronic acid was 1:7;

[0060] S2. The multiphase emulsion was passed into a 2 wt% aqueous solution of calcium chloride, washed, and dried at 35 ° C for 3 h to obtain microcapsules;

[0061] S3. Place the cotton fiber blank in a sodium persulfate aqueous solution 10 times its mass, add microcapsules to the persulfate aqueous solution, heat to 65°C, and keep it at 65°C for 10 minutes to carry out graft copolymerization reaction, squeeze out the liquid, the squeezing rate is 65wt%, and bake at 60°C for 8 minutes to obtain antibacterial and moisturizing cotton fiber fabrics, the mass ratio of sodium persulfate to microcapsules is 1:4.

[0062] Example 3

[0063] A method for preparing an antibacterial and moisturizing cotton fiber fabric, the specific steps are as follows:

[0064] S1. Add camphor essential oil, hyaluronic acid and sorbitan monooleate to soybean oil, mix well, and obtain an inner oil phase solution with a concentration of 35 g / L of camphor essential oil, a mass ratio of camphor essential oil to hyaluronic acid of 4:5, and a mass ratio of sorbitan monooleate to hyaluronic acid of 0.2:5;

[0065] Adding N-(hydroxymethyl)acrylamide to soybean oil and mixing well to obtain an external oil phase solution having a concentration of 30 g / L of N-(hydroxymethyl)acrylamide;

[0066] With water as the intermediate phase, inner oil phase solution, water and outer oil phase solution as raw materials, a multiphase emulsion was prepared by a microfluidic method according to the flow rate of the inner oil phase solution of 5 μL / min, the flow rate of water of 9 μL / min and the flow rate of the outer oil phase solution of 24 μL / min, and the mass ratio of N-(hydroxymethyl)acrylamide to hyaluronic acid was 3:5;

[0067] S2. The multiphase emulsion was passed into a 4 wt% aqueous solution of calcium chloride, washed, and dried at 30 ° C for 3.5 h to obtain microcapsules;

[0068] S3. Place the cotton fiber blank in a sodium persulfate aqueous solution 12 times its mass, add microcapsules to the persulfate aqueous solution, heat to 60°C, and keep it at 60°C for 15 minutes to carry out graft copolymerization reaction, squeeze out the liquid, the squeezing rate is 68wt%, and bake at 65°C for 6 minutes to obtain antibacterial and moisturizing cotton fiber fabrics, the mass ratio of sodium persulfate to microcapsules is 1:5.

[0069] Example 4

[0070] The antibacterial and moisturizing cotton fiber fabric was prepared in the same manner as in Example 3 except for the following conditions:

[0071] S1. Add camphor essential oil, hyaluronic acid and sorbitan monooleate to soybean oil, mix well, and obtain an inner oil phase solution with a concentration of 35 g / L of camphor essential oil, a mass ratio of camphor essential oil to hyaluronic acid of 4:5, and a mass ratio of sorbitan monooleate to hyaluronic acid of 0.2:5;

[0072] Adding N-(hydroxymethyl)acrylamide and dioctyl phthalate to soybean oil, mixing evenly, obtaining an external oil phase solution with a concentration of 30 g / L of N-(hydroxymethyl)acrylamide, and a mass ratio of dioctyl phthalate to N-(hydroxymethyl)acrylamide of 1.5:1;

[0073] With water as the intermediate phase, inner oil phase solution, water and outer oil phase solution as raw materials, a multiphase emulsion was prepared by a microfluidic method with a flow rate of 5 μL / min for the inner oil phase solution, 9 μL / min for the water and 24 μL / min for the outer oil phase solution. The mass ratio of N-(hydroxymethyl)acrylamide to hyaluronic acid was 3:5.

[0074] Example 5

[0075] The antibacterial and moisturizing cotton fiber fabric was prepared in the same manner as in Example 3 except for the following conditions:

[0076] S1. Add camphor essential oil, hyaluronic acid and sorbitan monooleate to soybean oil, mix well, and obtain an inner oil phase solution with a concentration of 35 g / L of camphor essential oil, a mass ratio of camphor essential oil to hyaluronic acid of 4:5, and a mass ratio of sorbitan monooleate to hyaluronic acid of 0.2:5;

[0077] Adding N-(hydroxymethyl)acrylamide and dioctyl phthalate to soybean oil, mixing evenly, obtaining an external oil phase solution with a concentration of 30 g / L of N-(hydroxymethyl)acrylamide, and a mass ratio of dioctyl phthalate to N-(hydroxymethyl)acrylamide of 0.8:4;

[0078] With inner oil phase solution, water and outer oil phase solution as raw materials, a multiphase emulsion was prepared by a microfluidic method with a flow rate of 5 μL / min for the inner oil phase solution, 9 μL / min for the water and 24 μL / min for the outer oil phase solution. The mass ratio of N-(hydroxymethyl)acrylamide to hyaluronic acid was 3:5.

[0079] Example 6

[0080] The antibacterial and moisturizing cotton fiber fabric was prepared in the same manner as in Example 3 except for the following conditions:

[0081] S1. Add camphor essential oil, hyaluronic acid and sorbitan monooleate to soybean oil, mix well, and obtain an inner oil phase solution with a concentration of 35 g / L of camphor essential oil, a mass ratio of camphor essential oil to hyaluronic acid of 4:5, and a mass ratio of sorbitan monooleate to hyaluronic acid of 0.2:5;

[0082] Adding N-(hydroxymethyl)acrylamide and triethylene glycol diacrylate to soybean oil, mixing evenly, to obtain an external oil phase solution with a concentration of 30 g / L of N-(hydroxymethyl)acrylamide, and a mass ratio of triethylene glycol diacrylate to N-(hydroxymethyl)acrylamide of 2:1;

[0083] With water as the intermediate phase, inner oil phase solution, water and outer oil phase solution as raw materials, a multiphase emulsion was prepared by a microfluidic method with a flow rate of 5 μL / min for the inner oil phase solution, 9 μL / min for the water and 24 μL / min for the outer oil phase solution. The mass ratio of N-(hydroxymethyl)acrylamide to hyaluronic acid was 3:5.

[0084] Example 7

[0085] The antibacterial and moisturizing cotton fiber fabric was prepared in the same manner as in Example 3 except for the following conditions:

[0086] S1. Add camphor essential oil, hyaluronic acid and sorbitan monooleate to soybean oil, mix well, and obtain an inner oil phase solution with a concentration of 35 g / L of camphor essential oil, a mass ratio of camphor essential oil to hyaluronic acid of 4:5, and a mass ratio of sorbitan monooleate to hyaluronic acid of 0.2:5;

[0087] Adding N-(hydroxymethyl)acrylamide and triethylene glycol diacrylate to soybean oil, mixing evenly, to obtain an external oil phase solution with a concentration of 30 g / L of N-(hydroxymethyl)acrylamide, and a mass ratio of triethylene glycol diacrylate to N-(hydroxymethyl)acrylamide of 1:4;

[0088] With water as the intermediate phase, inner oil phase solution, water and outer oil phase solution as raw materials, a multiphase emulsion was prepared by a microfluidic method with a flow rate of 5 μL / min for the inner oil phase solution, 9 μL / min for the water and 24 μL / min for the outer oil phase solution. The mass ratio of N-(hydroxymethyl)acrylamide to hyaluronic acid was 3:5.

[0089] Comparative Example 1

[0090] A method for preparing an antibacterial and moisturizing cotton fiber fabric, the specific steps are as follows:

[0091] S1. Add camphor essential oil, hyaluronic acid and sorbitan monooleate to soybean oil, mix well, and obtain an inner oil phase solution with a concentration of 35 g / L of camphor essential oil, a mass ratio of camphor essential oil to hyaluronic acid of 4:5, and a mass ratio of sorbitan monooleate to hyaluronic acid of 0.2:5;

[0092] S2. Place the cotton fiber blank in a sodium persulfate aqueous solution 12 times its mass, add the internal oil phase solution to the persulfate aqueous solution to carry out graft copolymerization reaction at 60°C for 15 minutes, squeeze out the liquid, and the squeezing rate is 68wt%. Bake at 65°C for 6 minutes to obtain an antibacterial and moisturizing cotton fiber fabric, wherein the mass ratio of sodium persulfate to the internal oil phase solution is 1:5.

[0093] That is, in this comparative example, camphor essential oil and hyaluronic acid were not made into capsules.

[0094] Performance Testing

[0095] Antibacterial performance test: 10 cm*10 cm samples were taken from the fabrics prepared in Examples 1-7 and Comparative Example 1, and the antibacterial values ​​of each sample against Staphylococcus aureus (ATCC 6538) and Escherichia coli (ATCC 1122938) were detected according to "GB / T 20944.2-2007 Evaluation of Antibacterial Properties of Textiles Part 2: Absorption Method", wherein the test bacterial solution was prepared after culturing according to the culture C method, and the results are shown in Table 1; then each group of samples was machine washed at room temperature, the washing time was 10 min, the water level was full water level, the stirring speed was 180 r / min, the drying speed was 650 r / min, the drying time was 6 min, and then naturally air-dried. After 50 cycles of washing and air-drying, the antibacterial values ​​of each sample against Staphylococcus aureus (ATCC 1122938) were detected again according to "GB / T 20944.2-2007 Evaluation of Antibacterial Properties of Textiles Part 2: Absorption Method". The antibacterial values ​​of the samples against Staphylococcus aureus (ATCC 6538) and Escherichia coli (ATCC 1122938) were measured again according to GB / T 20944.2-2007 Evaluation of antibacterial properties of textiles Part 2: Absorption method. The results are shown in Table 1. The samples were washed and air-dried again according to the same conditions for 50 times (i.e., each sample was washed 100 times in total). The antibacterial values ​​of the samples against Staphylococcus aureus (ATCC 6538) and Escherichia coli (ATCC 1122938) were measured again according to GB / T 20944.2-2007 Evaluation of antibacterial properties of textiles Part 2: Absorption method. The results are shown in Table 1.

[0096] Moisturizing effect test: 50cm*50cm samples of the fabrics prepared in Examples 1-7 and Comparative Example 1 were taken respectively, and the moisture regain of each sample at a temperature of 20°C and a relative humidity of 65% was measured according to the in-box heat weighing method in GB / T06503 Moisture regain of chemical fibers (oven temperature 108°C, drying time 1h). The results are shown in Table 2; then each group of samples was machine washed at room temperature, the washing time was 10min, the water level was full water level, the stirring speed was 180r / min, the drying speed was 650r / min, the drying time was 6min, and then naturally air-dried, and the washing-air-drying cycle was repeated. After 50 times, the moisture regain of each sample at a temperature of 20°C and a relative humidity of 65% was measured again according to the in-box thermal weighing method in "GB / T06503 Moisture Regain of Chemical Fibers" (oven temperature 108°C, drying time 1h), and the results are shown in Table 2; the washed samples were washed and air-dried 50 times according to the conditions (i.e., each sample was washed 100 times in total), and then the moisture regain of each sample at a temperature of 20°C and a relative humidity of 65% was measured again according to the in-box thermal weighing method in "GB / T06503 Moisture Regain of Chemical Fibers" (oven temperature 108°C, drying time 1h), and the results are shown in Table 2.

[0097] Table 1 Antibacterial performance test results

[0098]

[0099] Table 2 Moisturizing performance test results

[0100] Group Moisture regain (before washing) Moisture regain (after washing, 50 times) Moisture regain (after washing, 100 times) Example 1 9.4％ 8.5％ 7.8％ Example 2 9.7％ 8.9％ 8.3％ Example 3 9.0％ 8.2％ 7.5％ Example 4 9.3％ 9.2％ 9.2％ Example 5 9.4％ 9.4％ 9.3％ Example 6 11.7％ 11.0％ 10.3％ Example 7 11.2％ 10.4％ 9.7％ Comparative Example 1 9.4％ 6.7％ 3.6％

[0101] It can be seen from Tables 1 and 2 that before and after washing, the antibacterial value and moisture regain of Comparative Example 1 (turmeric oil, litsea cubeba oil and hyaluronic acid were not made into microcapsules) decreased significantly, while the antibacterial value and moisture regain of the fabric of Example 3 decreased slightly. The results show that, in the present invention, camphor essential oil with antibacterial effect and hyaluronic acid with moisturizing effect are made into an inner oil phase solution; N-(hydroxymethyl)acrylamide that can undergo graft copolymerization reaction with cotton fiber is made into an outer oil phase solution, and a multiphase emulsion is prepared by a microfluidic method using the inner oil phase solution, water and the outer oil phase solution as raw materials, and the multiphase emulsion is made into microcapsules, and then persulfate is used as an initiator, and N-(hydroxymethyl)acrylamide contained in the outer wall of the microcapsule is used as a grafting monomer to undergo graft copolymerization reaction with cotton fiber, and the microcapsule is grafted onto the cotton fiber, that is, the camphor essential oil with antibacterial effect and the hyaluronic acid with moisturizing effect are introduced into the cotton fiber by chemical bonding, thereby improving the bonding strength between the camphor essential oil and hyaluronic acid and the cotton fiber, thereby improving the durability of the antibacterial effect and moisturizing effect of the fabric.

[0102] As shown in Table 1 and Table 2, the antibacterial value and moisture regain of Example 3 (without dioctyl phthalate) slightly decreased before and after washing, while the antibacterial value and moisture regain of the fabrics of Example 4 (with dioctyl phthalate) and Example 5 (without dioctyl phthalate) did not change significantly. This result shows that dioctyl phthalate can increase the mechanical strength of the formed microcapsules, thereby further improving the antibacterial effect and the durability of the effect.

[0103] As shown in Table 1 and Table 2, for the samples before washing, compared with Example 3 (without adding dioctyl phthalate), the antibacterial value and moisture regain of the fabrics of Example 6 (with adding triethylene glycol diacrylate) and Example 7 (with adding triethylene glycol diacrylate) are significantly increased. This result shows that in the present invention, triethylene glycol diacrylate can promote more N-(hydroxymethyl) acrylamide to be grafted onto cotton fibers, and then more microcapsules are grafted onto cotton fibers, further improving the antibacterial and moisturizing effects of the fabrics.

[0104] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A method for preparing an antibacterial and moisturizing cotton fiber fabric, characterized in that: The preparation method comprises the following steps: S1. Add camphor essential oil, hyaluronic acid and sorbitan monooleate to soybean oil and mix well to obtain an inner oil phase solution; Adding N-(hydroxymethyl)acrylamide to soybean oil and mixing well to obtain an external oil phase solution; Using inner oil phase solution, water and outer oil phase solution as raw materials, a multiphase emulsion is prepared by a microfluidic method; S2. The multiphase emulsion is passed into an aqueous solution of calcium chloride, washed, and dried to obtain microcapsules; S3. placing the cotton fiber blank in a persulfate aqueous solution, adding the microcapsules into the persulfate aqueous solution to carry out a graft copolymerization reaction, squeezing the liquid, and baking to obtain the antibacterial and moisturizing cotton fiber fabric.

2. The preparation method according to claim 1, characterized in that In step S1, the mass ratio of the camphor essential oil to hyaluronic acid is 2-5:3-7; And / or, in step S1, the mass ratio of sorbitan monooleate to hyaluronic acid is 0.1-0.3:3-7; And / or, in step S1, the mass ratio of N-(hydroxymethyl)acrylamide to hyaluronic acid is 1-4:3-7.

3. The preparation method according to claim 1, characterized in that: In the inner oil phase solution of step S1, the concentration of the camphor essential oil is 20-50 g / L; And / or, in the external oil phase solution of step S1, the concentration of N-(hydroxymethyl)acrylamide is 10-40 g / L; and / or, in step S1, during the preparation of the multiphase emulsion, the flow rate of the inner oil phase solution is 2-6 μL / min; and / or, in step S1, during the preparation of the multiphase emulsion, the flow rate of the water is 7-11 μL / min; And / or, in step S1, during the preparation of the multiphase emulsion, the flow rate of the outer oil phase solution is 20-30 μL / min.

4. The preparation method according to claim 1, characterized in that: The external oil phase solution in step S1 also contains dioctyl phthalate.

5. The preparation method according to claim 4, characterized in that: In step S1, the mass ratio of dioctyl phthalate to N-(hydroxymethyl)acrylamide is 0.8-1.5:1-4.

6. The preparation method according to claim 1, characterized in that: The external oil phase solution in step S1 also contains triethylene glycol diacrylate.

7. The preparation method according to claim 6, characterized in that: In step S1, the mass ratio of triethylene glycol diacrylate to N-(hydroxymethyl)acrylamide is 1-2:1-4.

8. The preparation method according to claim 1, characterized in that: In step S2, the concentration of the calcium chloride aqueous solution is 2wt%-6wt%; And / or, in step S2, the drying temperature is 25-35°C, and the drying time is 3-4h.

9. The preparation method according to claim 1, characterized in that: In step S3, the mass ratio of the grey cloth to the persulfate aqueous solution is 1:10-15; And / or, in step S3, the mass ratio of the persulfate to the microcapsules is 1:4-7; And / or, in step S3, the temperature of the graft copolymerization reaction is 55-65° C., and the duration of the graft copolymerization reaction is 10-20 min; And / or, in step S3, during the squeezing process, the squeezing rate is 65wt%-70wt%; And / or, in step S3, the baking temperature is 60-70° C., and the baking time is 5-8 min.

10. The antibacterial and moisturizing cotton fiber fabric prepared by the method according to any one of claims 1 to 9.

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