CN110373899B - Washable antibacterial cotton fabric and preparation method thereof - Google Patents
Washable antibacterial cotton fabric and preparation method thereof Download PDFInfo
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- CN110373899B CN110373899B CN201910569127.8A CN201910569127A CN110373899B CN 110373899 B CN110373899 B CN 110373899B CN 201910569127 A CN201910569127 A CN 201910569127A CN 110373899 B CN110373899 B CN 110373899B
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- 239000004744 fabric Substances 0.000 title claims abstract description 100
- 229920000742 Cotton Polymers 0.000 title claims abstract description 91
- 230000000844 anti-bacterial effect Effects 0.000 title claims abstract description 48
- 238000002360 preparation method Methods 0.000 title claims abstract description 7
- 238000004519 manufacturing process Methods 0.000 title description 2
- 229920001661 Chitosan Polymers 0.000 claims abstract description 45
- FFEARJCKVFRZRR-UHFFFAOYSA-N L-Methionine Natural products CSCCC(N)C(O)=O FFEARJCKVFRZRR-UHFFFAOYSA-N 0.000 claims abstract description 42
- FFEARJCKVFRZRR-BYPYZUCNSA-N L-methionine Chemical compound CSCC[C@H](N)C(O)=O FFEARJCKVFRZRR-BYPYZUCNSA-N 0.000 claims abstract description 42
- 229930195722 L-methionine Natural products 0.000 claims abstract description 42
- 229960004452 methionine Drugs 0.000 claims abstract description 42
- 238000001035 drying Methods 0.000 claims abstract description 31
- 239000007864 aqueous solution Substances 0.000 claims abstract description 27
- SQGYOTSLMSWVJD-UHFFFAOYSA-N silver(1+) nitrate Chemical compound [Ag+].[O-]N(=O)=O SQGYOTSLMSWVJD-UHFFFAOYSA-N 0.000 claims abstract description 22
- 238000002791 soaking Methods 0.000 claims abstract description 21
- 229910001961 silver nitrate Inorganic materials 0.000 claims abstract description 11
- 229910000033 sodium borohydride Inorganic materials 0.000 claims abstract description 11
- 239000012279 sodium borohydride Substances 0.000 claims abstract description 11
- 238000010438 heat treatment Methods 0.000 claims description 10
- 239000002245 particle Substances 0.000 abstract description 17
- 238000000034 method Methods 0.000 abstract description 13
- FOIXSVOLVBLSDH-UHFFFAOYSA-N Silver ion Chemical compound [Ag+] FOIXSVOLVBLSDH-UHFFFAOYSA-N 0.000 abstract description 11
- 239000000243 solution Substances 0.000 abstract description 5
- 239000012620 biological material Substances 0.000 abstract description 4
- 238000006243 chemical reaction Methods 0.000 abstract description 3
- 238000009776 industrial production Methods 0.000 abstract description 3
- 238000005406 washing Methods 0.000 description 19
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 18
- 241000588724 Escherichia coli Species 0.000 description 9
- 241000191967 Staphylococcus aureus Species 0.000 description 9
- 239000002994 raw material Substances 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 230000000694 effects Effects 0.000 description 6
- 238000001179 sorption measurement Methods 0.000 description 6
- 239000000853 adhesive Substances 0.000 description 5
- 230000001070 adhesive effect Effects 0.000 description 5
- 229910052709 silver Inorganic materials 0.000 description 5
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 3
- 229920001282 polysaccharide Polymers 0.000 description 3
- 239000004332 silver Substances 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 125000003277 amino group Chemical group 0.000 description 2
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 2
- 229920002678 cellulose Polymers 0.000 description 2
- 239000001913 cellulose Substances 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 150000003378 silver Chemical group 0.000 description 2
- 125000003396 thiol group Chemical class [H]S* 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 230000006750 UV protection Effects 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 150000001413 amino acids Chemical class 0.000 description 1
- 239000003242 anti bacterial agent Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 229920002988 biodegradable polymer Polymers 0.000 description 1
- 239000004621 biodegradable polymer Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 230000000536 complexating effect Effects 0.000 description 1
- 238000010668 complexation reaction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000005886 esterification reaction Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 229920000587 hyperbranched polymer Polymers 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 230000002147 killing effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 244000052769 pathogen Species 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000002829 reductive effect Effects 0.000 description 1
- 238000003900 soil pollution Methods 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 125000004434 sulfur atom Chemical group 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
- D06M11/83—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with metals; with metal-generating compounds, e.g. metal carbonyls; Reduction of metal compounds on textiles
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
- D06M13/322—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing nitrogen
- D06M13/325—Amines
- D06M13/342—Amino-carboxylic acids; Betaines; Aminosulfonic acids; Sulfo-betaines
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
- D06M15/01—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with natural macromolecular compounds or derivatives thereof
- D06M15/03—Polysaccharides or derivatives thereof
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M16/00—Biochemical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. enzymatic
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
- D06M2101/02—Natural fibres, other than mineral fibres
- D06M2101/04—Vegetal fibres
- D06M2101/06—Vegetal fibres cellulosic
Abstract
The invention belongs to the field of new biological materials, and discloses a preparation method of an antibacterial cotton fabric with high efficiency and washability. The washable antibacterial cotton fabric is constructed by cotton fabric, carboxylated chitosan, L-methionine and nano-silver. The preparation method of the washable antibacterial cotton fabric comprises the following steps: firstly, soaking the cotton fabric into a mixed aqueous solution of carboxylated chitosan and L-methionine, and then carrying out dry heat reaction. And secondly, soaking the carboxylated chitosan and L-methionine loaded cotton fabric into a silver nitrate solution, drying, soaking into a sodium borohydride aqueous solution to reduce the silver nanoparticles into nano silver particles, and rinsing and drying the nano silver particles to obtain the modified cotton fabric. The method is simple, green and environment-friendly, and is suitable for industrial production. The obtained cotton fabric has high antibacterial rate and good washability.
Description
Technical Field
The invention relates to an antibacterial cotton fabric with high washability and a preparation method thereof, belonging to the field of new biological materials.
Background
Cotton fabrics are very popular for their excellent properties, such as elasticity, wearing comfort, water absorption, breathability, etc. In addition, modified cotton fabrics have many other applications including water resistance, antibacterial, fire resistance, and uv protection. In particular, the preparation of the antibacterial cotton fabric by using silver nanoparticles (Ag NPs) to carry out surface modification on the cotton fabric has wide research and is applied to industrial production.
Since Ag NPs have a high specific surface area, have a high inhibitory effect on the activity of most pathogens, and are low in cost, Ag NPs are an important antibacterial agent. However, some recent studies have shown that silver nanoparticles have health risks and environmental issues (Water Air and Soil Pollution, 2016, 227, 306). The toxicity of silver nanoparticles is mainly caused by the spill of Ag NPs (Food and Chemical diagnostics, 2015, 77, 58), and these problems greatly limit the application of silver-based antibacterial cotton fabrics. Therefore, cotton fabrics can be provided withThe method for effectively fixing the silver nanoparticles becomes a new hotspot for the functional research of textiles. In past studies, many methods have been proposed to improve the adhesion properties of silver nanoparticles on cotton fabric surfaces (Cellulose, 2016, 23, 2791). Among these methods, the application of polymer adhesives is very effective and has been widely studied. For example, amino-terminated hyperbranched polymers (HBP-NH)2) (Carbohydrate polymers, 2013, 92, 2088-.
Chitosan is a non-toxic, inexpensive, biodegradable polymer with a large number of amino groups that can coordinate with silver to immobilize silver nanoparticles. However, the physically adsorbed chitosan does not form covalent bonds with the fiber surface, and the durability of the bonding effect is unsatisfactory. There are many methods for supporting chitosan chains on cotton fibers by chemical reaction, such as a cross-linking method, a plasma technology, an oxidation treatment method of fabric (Applied Surface Science, 2014, 309, 138), but it is not suitable for industrial production due to expensive reagents and complicated reaction processes. Carboxyl groups in the carboxylated chitosan chemically react with hydroxyl groups on the surface of the cotton fabric to be fixed on the surface of the cotton fabric in a covalent bond mode (Carbohydrate Polymers, 2019, 204 and 42).
However, our previous studies showed that the antibacterial effect of modified cotton decreased significantly after 50 standard washes due to limited complexation of the amino group to the silver atom (Carbohydrate polymers, 2017, 177, 187). Therefore, the patent emphasizes on improving the fixing effect of the modified cotton cloth on the nano silver, thereby further enhancing the washing fastness of the antibacterial cotton cloth.
L-methionine is a natural amino acid having a sulfur atom that can coordinate with a silver atom to immobilize silver nanoparticles. L-methionine has carboxyl group, and can be fixed on the surface of the cotton cloth in a covalent bond manner by esterification reaction with hydroxyl group on the cotton cloth, so the L-methionine is also a high-efficiency adhesive (RSC Advances, 2018, 8, 24458). According to the invention, carboxylated chitosan and L-methionine are utilized to form a composite system and simultaneously fix nano silver particles, and the carboxylated chitosan is used as a stabilizer, so that more binding sites can be provided to increase the grafting amount of L-methionine, the complexing effect on silver atoms is enhanced, and the washing fastness of the antibacterial cotton fabric is obviously improved.
However, cellulose molecules on the surface of the cotton cloth are mostly in a crystalline state, and hydroxyl functional groups capable of effectively reacting with L-methionine are few, so that the surface of the cotton cloth is treated by the mixture of the carboxylated chitosan and the L-methionine, the mercapto density of the surface of the fiber can be greatly improved, and the curing efficiency of the nano silver particles is improved.
In conclusion, the cotton fabric has the characteristics of good flexibility, good air permeability, good water absorption, good biocompatibility, low price and easy obtaining, and has the advantage of unique thickness when used as a biological material. But the further application of the antibacterial fabric is hindered by the defects of low antibacterial rate and poor antibacterial washability. Although a cotton fabric with good antibacterial property can be obtained by loading the nano silver particles, the washing fastness of the antibacterial fabric is poor and the product is unsafe due to the weak adsorption capacity of the nano silver. The invention provides a simple and feasible method for improving the adsorption capacity of the nano silver particles and improving the washability and safety of the antibacterial fabric.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: the antibacterial cotton fabric loaded with the nano-silver particles has poor washing fastness and safety due to the weak adsorption capacity of the nano-silver. The invention provides a simple and feasible method for improving the adsorption capacity of the nano silver particles and improving the washability and safety of the antibacterial fabric. According to the invention, through the synergistic effect of the carboxylated chitosan and the L-methionine, the mercapto density of the surface of the fabric is improved, the adsorption strength of the nano-silver particles on the surface of the fabric is enhanced, and the washable and safe antibacterial fabric is prepared. According to the method, the mixture of carboxylated chitosan and L-methionine is used for treating the surface of the cotton fabric to increase the density of sulfydryl, and then the nano silver particles prepared by a reduction method increase the adsorption capacity through the coordination effect with sulfydryl, so that the washable and safe antibacterial cotton fabric is obtained. Wherein, when the molecular weight of the carboxylated chitosan is 1000-20000, a better effect of fixing silver particles on the surface can be obtained. The specific technical scheme is as follows:
the invention comprises the following steps:
1) soaking a cotton fabric raw material into 1-4 wt% of aqueous solution of carboxylated chitosan and L-methionine for 0.5-2 h, controlling the weight increase to be 90-110%, and then heating at 180-200 ℃ for 0.01-0.05 h;
2) soaking the cotton fabric loaded with the carboxylated chitosan and the L-methionine into 0.1-1 wt% silver nitrate water solution for 1-2 h, controlling the weight increase to be 80-100%, and then drying for 1h at 100 ℃;
3) immersing the cotton fabric into 0.05-0.5 wt% sodium borohydride aqueous solution for 1-2 h, and then drying for 1h at 100 ℃;
4) washing with distilled water for 3 times, and drying at 100 deg.C for 1 h.
Compared with the prior art, the method does not use any organic solvent, is green and pollution-free in the whole process, does not have the problem of toxic and harmful molecule residues, and is very suitable for preparing the biological material.
According to the invention, carboxylated chitosan, L-methionine and nano-silver are tightly loaded on the cotton fabric, the cotton fabric loaded with carboxylated chitosan and L-methionine has almost no inhibition effect on escherichia coli and staphylococcus aureus, the antibacterial rate of the antibacterial cotton fabric loaded with nano-silver on the two bacteria reaches 100%, and the high antibacterial performance of the cotton fabric is provided. The carboxylated chitosan and the L-methionine play a role of an adhesive, the cotton fabric without the adhesive is washed for 10 times, and the antibacterial rate is reduced to 60%. The cotton fabric loaded with the adhesive and the nano-silver has the antibacterial rate of 97% on escherichia coli and staphylococcus aureus after 200 times of washing, and the washability of the cotton fabric is improved.
Detailed Description
The technical solution of the present invention will be further described with reference to specific examples.
Example 1
Firstly, soaking a cotton fabric raw material into a 1wt% aqueous solution of carboxylated chitosan and L-methionine for 0.5h, then heating at 180 ℃ for 0.03h, washing and drying.
The prepared antibacterial cotton fabric is constructed by cotton fabric, carboxylated chitosan and L-methionine, the molecular weight of the carboxylated chitosan is 1500, the molecular weight of the L-methionine is 149, and the obtained antibacterial cotton fabric has no obvious killing effect on escherichia coli and staphylococcus aureus.
Example 2
Firstly, immersing a cotton fabric raw material into a 1wt% L-methionine aqueous solution for 0.5h, then heating at 180 ℃ for 0.03h, immersing the cotton fabric loaded with L-methionine into a 0.2 wt% silver nitrate aqueous solution for 2h, and then drying at 100 ℃ for 1 h. Immersing the cotton fabric into 0.2% sodium borohydride aqueous solution for 1h, then drying for 1h at 100 ℃, washing and drying.
The prepared antibacterial cotton fabric is constructed by cotton fabric, nano Ag and L-methionine, wherein the particle size of the nano Ag is 84nm, the molecular weight of the L-methionine is 149, the bacteriostasis rate of the obtained antibacterial cotton fabric to escherichia coli and staphylococcus aureus reaches more than 99.9%, and through 90 times of strict washing cycles, the bacteriostasis rate is more than 97.0%.
Example 3
Firstly, soaking a cotton fabric raw material into a 1wt% carboxylated chitosan aqueous solution for 0.5h, then heating at 180 ℃ for 0.03h, then soaking the cotton fabric loaded with the carboxylated chitosan into a 0.2 wt% silver nitrate aqueous solution for 2h, and then drying at 100 ℃ for 1 h. Immersing the cotton fabric into 0.2% sodium borohydride aqueous solution for 1h, then drying for 1h at 100 ℃, washing and drying.
The prepared antibacterial cotton fabric is constructed by cotton fabric, nano Ag and carboxylated chitosan, wherein the particle size of the nano Ag is 64nm, the molecular weight of the carboxylated chitosan is 1500, the bacteriostasis rate of the obtained antibacterial cotton fabric to escherichia coli and staphylococcus aureus reaches more than 99.9%, and the bacteriostasis rate is more than 94.0% after 50 times of strict washing cycles.
Example 4
Firstly, soaking a cotton fabric raw material into a 1wt% aqueous solution of carboxylated chitosan and L-methionine for 0.5h, then heating at 180 ℃ for 0.03h, then soaking the cotton fabric loaded with the carboxylated chitosan and L-methionine into a 0.2 wt% aqueous solution of silver nitrate for 2h, and then drying at 100 ℃ for 1 h. Immersing the cotton fabric into 0.2% sodium borohydride aqueous solution for 1h, then drying for 1h at 100 ℃, washing and drying.
The prepared antibacterial cotton fabric is constructed by cotton fabric, nano Ag, carboxylated chitosan and L-methionine, wherein the particle size of the nano Ag is 65nm, the molecular weight of the carboxylated chitosan is 1500, and the molecular weight of the L-methionine is 149, the bacteriostasis rate of the obtained antibacterial cotton fabric to escherichia coli and staphylococcus aureus reaches more than 99.9%, and the bacteriostasis rate is more than 97.0% after 200 times of strict washing cycles.
Example 5
Firstly, soaking a cotton fabric raw material into a 2 wt% aqueous solution of carboxylated chitosan and L-methionine for 1h, then heating at 180 ℃ for 0.03h, then soaking the cotton fabric loaded with the carboxylated chitosan and L-methionine into a 0.5wt% aqueous solution of silver nitrate for 2h, and drying at 100 ℃ for 1 h. Soaking the cotton fabric in 0.3% sodium borohydride water solution for 1 hr, drying at 100 deg.c for 1 hr, washing and drying.
The prepared antibacterial cotton fabric is constructed by cotton fabric, nano Ag and carboxylated chitosan, wherein the particle size of the nano Ag is 70nm, the molecular weight of the carboxylated chitosan is 1500, the molecular weight of the L-methionine is 149, the antibacterial rate of the obtained antibacterial cotton fabric to escherichia coli and staphylococcus aureus reaches more than 99.9%, and the antibacterial rate is more than 97.0% after 200 times of strict washing cycles.
Example 6
Firstly, soaking a cotton fabric raw material into 3wt% of carboxylated chitosan and L-methionine aqueous solution for 1.5h, then heating at 190 ℃ for 0.02h, then soaking the cotton fabric loaded with the carboxylated chitosan and L-methionine into 0.8wt% of silver nitrate aqueous solution for 2h, and drying at 100 ℃ for 1 h. Immersing the cotton fabric into 0.4% sodium borohydride aqueous solution for 1.5h, then drying for 1h at 100 ℃, washing and drying.
The prepared antibacterial cotton fabric is constructed by cotton fabric, nano Ag, carboxylated chitosan and L-methionine, wherein the particle size of the nano Ag is 75nm, the molecular weight of the carboxylated chitosan is 15000, and the molecular weight of the L-methionine is 149, the bacteriostasis rate of the obtained antibacterial cotton fabric to escherichia coli and staphylococcus aureus reaches more than 99.9%, and the bacteriostasis rate is more than 97.0% after 200 times of strict washing cycles.
Example 7
Firstly, soaking a cotton fabric raw material into 4wt% of carboxylated chitosan and L-methionine aqueous solution for 2 hours, then heating the cotton fabric at 200 ℃ for 0.05 hour, then soaking the cotton fabric loaded with the carboxylated chitosan and L-methionine into 1wt% of silver nitrate aqueous solution for 2 hours, and taking out and drying the cotton fabric at 100 ℃ for 1 hour. Soaking the cotton fabric in 0.5% sodium borohydride water solution for 2h, drying at 100 ℃ for 1h, washing and drying.
The prepared antibacterial cotton fabric is constructed by cotton fabric, nano Ag, carboxylated chitosan and L-methionine, wherein the particle size of the nano Ag is 80nm, the molecular weight of the carboxylated chitosan is 20000, and the molecular weight of the L-methionine is 149, the antibacterial rate of the obtained antibacterial cotton fabric to escherichia coli and staphylococcus aureus reaches more than 99.9%, and the antibacterial rate is more than 97.0% after 200 times of strict washing cycles.
A summary of the above examples is shown in table 1:
table 1.
Claims (1)
1. A preparation method of a washable antibacterial cotton fabric comprises the following steps:
firstly, padding a cotton fabric in a mixed aqueous solution of carboxylated chitosan and L-methionine to obtain wet fabric, and then carrying out dry heat treatment, wherein the concentration of the carboxylated chitosan in the mixed aqueous solution of carboxylated chitosan and L-methionine is 1-4 wt%, the concentration of the L-methionine is 1-2 wt%, the weight of the padded wet fabric is increased by 90-110%, the dry heat temperature is 180-200 ℃, and the heating time is 0.01-0.05 h;
secondly, padding the finished cotton fabric in a silver nitrate aqueous solution and drying, wherein the concentration of silver nitrate in the silver nitrate aqueous solution is 0.1-1 wt%, the soaking time is 1-2 h, the weight of the padded wet fabric is increased by 80-100%, the drying temperature is 100 ℃, and the drying time is 1 h;
soaking the finished cotton fabric in an aqueous solution of sodium borohydride, drying, wherein the concentration of sodium borohydride in the aqueous solution of sodium borohydride is 0.05-0.5 wt%, the soaking time is 1-2 hours, the drying temperature is 100 ℃, the drying time is 1 hour, and finally rinsing and drying are carried out to obtain the washable antibacterial cotton fabric;
the molecular weight of the carboxylated chitosan is 1000-20000.
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| CN111621984B (en) * | 2020-06-16 | 2022-12-20 | 浙江理工大学 | Recyclable antibacterial cotton cloth and preparation method thereof |
| CN112195650A (en) * | 2020-10-28 | 2021-01-08 | 上海威露美生物科技有限公司 | Hydroxyl esterification complex antibacterial fiber, preparation method and application |
| CN112647294B (en) * | 2021-01-13 | 2022-06-03 | 浙江理工大学 | Antibacterial cotton fabric with excellent washing fastness and preparation process thereof |
| CN113445315A (en) * | 2021-06-21 | 2021-09-28 | 浙江理工大学 | Preparation method of diphenolic acid antibacterial cotton fabric |
| CN115162007B (en) * | 2022-08-18 | 2023-10-03 | 江南大学 | Self-crosslinking type antibacterial ultraviolet-proof finishing agent for textiles and preparation method thereof |
| CN115852690B (en) * | 2022-12-01 | 2023-08-29 | 安徽工程大学 | Preparation method of high-stability conductive and electromagnetic shielding cotton fabric |
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