CN112626841A - Durable antibacterial knitted fabric and preparation method thereof - Google Patents
Durable antibacterial knitted fabric and preparation method thereof Download PDFInfo
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- CN112626841A CN112626841A CN202011610209.1A CN202011610209A CN112626841A CN 112626841 A CN112626841 A CN 112626841A CN 202011610209 A CN202011610209 A CN 202011610209A CN 112626841 A CN112626841 A CN 112626841A
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- 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
- D06M10/00—Physical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. ultrasonic, corona discharge, irradiation, electric currents, or magnetic fields; Physical treatment combined with treatment with chemical compounds or elements
- D06M10/02—Physical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. ultrasonic, corona discharge, irradiation, electric currents, or magnetic fields; Physical treatment combined with treatment with chemical compounds or elements ultrasonic or sonic; Corona discharge
- D06M10/025—Corona discharge or low temperature plasma
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06B—TREATING TEXTILE MATERIALS USING LIQUIDS, GASES OR VAPOURS
- D06B3/00—Passing of textile materials through liquids, gases or vapours to effect treatment, e.g. washing, dyeing, bleaching, sizing, impregnating
- D06B3/10—Passing of textile materials through liquids, gases or vapours to effect treatment, e.g. washing, dyeing, bleaching, sizing, impregnating of fabrics
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- 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
- D06M13/10—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 oxygen
- D06M13/184—Carboxylic acids; Anhydrides, halides or salts thereof
- D06M13/203—Unsaturated carboxylic acids; Anhydrides, halides or salts thereof
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- 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
- D06M13/395—Isocyanates
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- 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
- D06M14/00—Graft polymerisation of monomers containing carbon-to-carbon unsaturated bonds on to fibres, threads, yarns, fabrics, or fibrous goods made from such materials
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- 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
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- 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
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Abstract
The invention belongs to the technical field of fabric preparation, and relates to a durable antibacterial knitted fabric and a preparation method thereof, wherein the obtained diphenylmethane-4, 4 '-diisocyanate-chitosan-acryloyl chloride grafted fabric has better binding force between the diphenylmethane-4, 4' -diisocyanate and organic groups in fabric fibers, and can firmly bind chitosan with antibacterial effect to the surface of the fabric, so that the antibacterial performance of the fabric has certain durability, and the antibacterial property is still kept strong enough even after multiple times of use and washing; the acryloyl chloride can also promote the chitosan to fully exert the antibacterial effect of the chitosan, and further enhance the antibacterial performance of the fabric. According to the invention, the 1-vinyl imidazole is grafted on the acryloyl chloride, the 1-vinyl imidazole has washing resistance and slow release property, and for knitted fabrics with coil structures, the existence of the 1-vinyl imidazole can effectively improve the washing resistance of the antibacterial knitted fabrics, enables the antibacterial substances to have certain slow release property, and further improves the duration time of the antibacterial effect of the antibacterial knitted fabrics.
Description
Technical Field
The invention relates to the technical field of fabric and fabric production, in particular to a durable antibacterial knitted fabric and a preparation method thereof.
Background
With the development of economic society, functional fabrics are increasingly favored by consumers, and compared with traditional fabrics, the functional fabrics also have wider market space, so that various fabric manufacturers are dedicated to development and production of the functional fabrics in order to seize the market.
Chinese patent CN112048780A discloses a preparation method of a wear-resistant water-fast antibacterial fabric, which comprises the following steps: step S1, preparation of a 2,3,5, 6-tetrafluoroterephthalic acid/3, 3 '-diamino dipropyl amine polycondensate, step S2, modification of the 2,3,5, 6-tetrafluoroterephthalic acid/3, 3' -diamino dipropyl amine polycondensate through cyanophenyl group ionization, step S3, preparation of wear-resistant fibers, step S4, preparation of wear-resistant fibers, step S5 and preparation of wear-resistant and water-washable antibacterial fabrics. The invention also provides the fabric prepared by the preparation method of the wear-resistant water-fast antibacterial fabric. The wear-resistant washable antibacterial fabric provided by the invention has the advantages of excellent comprehensive performance, good wear resistance, softness, air permeability, hand feeling, flexing resistance and antibacterial property. Chinese patent CN112048906A discloses a preparation method of an antibacterial silver-containing fiber with excellent biocompatibility, which comprises the following steps: (1) pretreating alginate fiber filament bundles, wherein the pretreatment step is to pass alginate fibers through an organic solution of sodium salt; (2) mounting the pretreated seaweed filament bundle on a feeding roller for magnetron sputtering; (3) and closing the vacuum sputtering coating chamber and vacuumizing. (4) And introducing gas, starting a processing power supply and a target table power supply, and processing the alginate fiber filaments to obtain the antibacterial silver-containing fiber with excellent biocompatibility. Chinese patent CN112030554A discloses a radiation-proof breathable antibacterial fabric which is characterized by comprising a base fabric layer and a weather-proof breathable functional layer arranged on the base fabric layer; the base cloth layer is formed by weaving warp yarns and weft yarns; the warp yarns are nano-silver modified graphene fibers; the weft yarns are functional synthetic fibers; the functional synthetic fiber is prepared from the following raw materials in parts by weight: 10-20 parts of carboxyl-terminated hyperbranched polyester, 50-70 parts of polyester slices, 1-3 parts of cation modified hydroxylated fullerene, 2-5 parts of graphene coated nano aluminum powder and 1-3 parts of coupling agent; the coupling agent is at least one of a silane coupling agent KH550, a silane coupling agent KH560 and a silane coupling agent KH 570.
Various methods for preparing antibacterial functional fabrics have been disclosed in the prior art, but all of them have a common disadvantage in that the durability of the antibacterial effect is poor, and the fabrics have good antibacterial property in the initial state, but after many uses and many washes, the antibacterial property is reduced linearly, or the antibacterial property is not available, which is the same as that of ordinary fabrics. In particular, in the case of a knitted fabric, it is expected that an antibacterial substance is not stably attached to the surface of the knitted fabric when the antibacterial modification is performed due to the special loop structure of the knitted fabric, and the antibacterial effect of the antibacterial knitted fabric is almost lost after washing several times. Therefore, how to improve the antibacterial durability and durability of the antibacterial knitted fabric becomes a key direction for the current development of antibacterial fabrics.
Disclosure of Invention
In order to solve the technical problems, the invention provides an antibacterial functional fabric for a vehicle and a preparation method thereof.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a preparation method of a durable antibacterial knitted fabric comprises the following steps:
step 1): treating a fabric raw material;
step 2): the method comprises the following steps of (1) carrying out graft treatment on diphenylmethane-4, 4 '-diisocyanate, soaking the fabric raw material obtained in the step 1) into a treatment container filled with a first treatment solution, wherein the treatment container is provided with a nitrogen inlet, a material outlet and a condenser, carrying out magnetic stirring on the fabric in the treatment container, introducing nitrogen into the treatment container, adding 3-6g of diphenylmethane-4, 4' -diisocyanate in the nitrogen atmosphere, continuously stirring the mixture at 80-90 ℃ for 5-6 hours, thoroughly washing the fabric with acetone after the reaction is finished, and drying the fabric for later use.
Step 3): performing chitosan grafting treatment, namely grafting chitosan and the diphenylmethane-4, 4 '-diisocyanate unit on the fabric obtained in the step 2), and performing grafting reaction on the fabric obtained in the step 2) in a second treatment solution to obtain the diphenylmethane-4, 4' -diisocyanate-chitosan grafted fabric, wherein the second treatment solution comprises chitosan and DMAC;
step 4): performing acryloyl chloride grafting treatment, namely soaking the diphenylmethane-4, 4 '-diisocyanate-chitosan grafted fabric obtained in the step 3) into a third treatment solution containing acryloyl chloride and dichloromethane, and reacting to obtain the diphenylmethane-4, 4' -diisocyanate-chitosan-acryloyl chloride grafted fabric;
step 5): 1-vinyl imidazole grafting treatment, namely soaking the diphenylmethane-4, 4 '-diisocyanate-chitosan-acryloyl chloride grafted fabric obtained in the step 4) into a fourth treatment solution for grafting treatment, wherein the fourth treatment solution comprises DMF, 1-vinyl imidazole and azobisisobutyronitrile, and reacting to obtain the diphenylmethane-4, 4' -diisocyanate-chitosan-acryloyl chloride-1-vinyl imidazole grafted fabric.
Further, the fabric raw material treatment method in the step 1) comprises the steps of washing the fabric with acetone and deionized water, drying, and then carrying out activation treatment on the dried fabric raw material through low-temperature plasma equipment in an air atmosphere.
Further, the activation treatment is to carry out plasma treatment on the fabric raw material at the power of 120W-180W.
Further, the first treatment liquid comprises DMF and dibutyltin dilaurate.
Further, the second treatment liquid comprises chitosan, DMAC, acetic acid and dibutyltin dilaurate.
Further, the grafting reaction conditions in the step 3) are that the mixture is continuously magnetically stirred and reacted for 10h-12 h at the temperature of 90-100 ℃ under the nitrogen atmosphere, then the product is washed for 3-5 times by acetone and dried for 1-2 h at the temperature of 70-80 ℃ to obtain the diphenylmethane-4, 4' -diisocyanate-chitosan grafted fabric.
Further, the reaction conditions in the step 4) are that the mixture is continuously stirred magnetically at 50-60 ℃ for reaction for 4-6 h, and after the reaction is completed, the product is washed with dichloromethane for 4-5 times and dried at 60 ℃ for 30 min.
Further, the reaction condition in the step 5) is that magnetic stirring is carried out for 24 hours at the temperature of 80-90 ℃ under nitrogen atmosphere, and after the reaction is finished, the diphenylmethane-4, 4' -diisocyanate-chitosan-acryloyl chloride-1-vinyl imidazole grafted fabric is obtained by washing with a methanol aqueous solution and then drying.
The invention also provides a durable antibacterial knitted fabric and a preparation method thereof, and the durable antibacterial knitted fabric is prepared by the preparation method.
The invention has the beneficial effects that:
according to the diphenylmethane-4, 4 '-diisocyanate-chitosan-acryloyl chloride grafted fabric, the diphenylmethane-4, 4' -diisocyanate and organic groups in fabric fibers have good binding force, and chitosan with an antibacterial effect can be firmly bound to the surface of the fabric, so that the antibacterial performance of the fabric has certain durability, and the fabric still has a strong enough antibacterial property even after being used and washed for multiple times; the acryloyl chloride can also promote the chitosan to fully exert the antibacterial effect of the chitosan, and further enhance the antibacterial performance of the fabric. According to the invention, the 1-vinyl imidazole is grafted on the acryloyl chloride, the 1-vinyl imidazole has washing resistance and slow release property, and for knitted fabrics with coil structures, the existence of the 1-vinyl imidazole can effectively improve the washing resistance of the antibacterial knitted fabrics, enables the antibacterial substances to have certain slow release property, and further improves the duration time of the antibacterial effect of the antibacterial knitted fabrics.
Detailed Description
For further understanding of the present invention, embodiments of the present invention will be described in further detail below with reference to examples, but the embodiments of the present invention are not limited thereto.
In order to make the purpose and technical solution of the present invention more apparent, the present invention is further described in detail with reference to the following examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. The following describes the application of the present invention in detail.
Example 1:
a preparation method of a durable antibacterial knitted fabric comprises the following steps:
step 1): treating a fabric raw material;
step 2): the method comprises the following steps of (1) carrying out graft treatment on diphenylmethane-4, 4 '-diisocyanate, soaking the fabric raw material obtained in the step 1) into a treatment container filled with a first treatment solution, wherein the treatment container is provided with a nitrogen inlet, a material outlet and a condenser, carrying out magnetic stirring on the fabric in the treatment container, introducing nitrogen into the treatment container, adding 3g of diphenylmethane-4, 4' -diisocyanate in the nitrogen atmosphere, continuously stirring the mixture at 80 ℃ for 5 hours, thoroughly washing the fabric with acetone after the reaction is finished, and drying the fabric for later use.
Step 3): performing chitosan grafting treatment, namely grafting chitosan and the diphenylmethane-4, 4 '-diisocyanate unit on the fabric obtained in the step 2), and performing grafting reaction on the fabric obtained in the step 2) in a second treatment solution to obtain the diphenylmethane-4, 4' -diisocyanate-chitosan grafted fabric, wherein the second treatment solution comprises chitosan and DMAC;
step 4): performing acryloyl chloride grafting treatment, namely soaking the diphenylmethane-4, 4 '-diisocyanate-chitosan grafted fabric obtained in the step 3) into a third treatment solution containing acryloyl chloride and dichloromethane, and reacting to obtain the diphenylmethane-4, 4' -diisocyanate-chitosan-acryloyl chloride grafted fabric;
step 5): 1-vinyl imidazole grafting treatment, namely soaking the diphenylmethane-4, 4 '-diisocyanate-chitosan-acryloyl chloride grafted fabric obtained in the step 4) into a fourth treatment solution for grafting treatment, wherein the fourth treatment solution comprises DMF, 1-vinyl imidazole and azobisisobutyronitrile, and reacting to obtain the diphenylmethane-4, 4' -diisocyanate-chitosan-acryloyl chloride-1-vinyl imidazole grafted fabric.
Further, the fabric raw material treatment method in the step 1) comprises the steps of washing the fabric with acetone and deionized water, drying, and then carrying out activation treatment on the dried fabric raw material through low-temperature plasma equipment in an air atmosphere.
Further, the activation treatment is to perform plasma treatment on the fabric raw material at the power of 120 WW.
Further, the first treatment liquid comprises DMF and dibutyltin dilaurate.
Further, the second treatment liquid comprises chitosan, DMAC, acetic acid and dibutyltin dilaurate.
Further, the grafting reaction conditions in the step 3) are that the mixture is continuously magnetically stirred at 90 ℃ for 10h under a nitrogen atmosphere, and then the product is washed 3 times with acetone and dried at 70 ℃ for 1h to obtain the diphenylmethane-4, 4' -diisocyanate-chitosan grafted fabric.
Further, the reaction conditions in the step 4) are that the mixture is continuously reacted for 4 hours under magnetic stirring at 50-60 ℃, after the reaction is completed, the product is washed 4 times by dichloromethane and dried for 30min at 60 ℃.
Further, the reaction condition in the step 5) is that magnetic stirring is carried out for 24 hours at 80 ℃ under nitrogen atmosphere, and after the reaction is finished, the diphenylmethane-4, 4' -diisocyanate-chitosan-acryloyl chloride-1-vinyl imidazole grafted fabric is obtained by washing with a methanol aqueous solution and then drying.
Example 2
A preparation method of a durable antibacterial knitted fabric comprises the following steps:
step 1): treating a fabric raw material;
step 2): the method comprises the following steps of (1) carrying out graft treatment on diphenylmethane-4, 4 '-diisocyanate, soaking the fabric raw material obtained in the step 1) into a treatment container filled with a first treatment solution, wherein the treatment container is provided with a nitrogen inlet, a material outlet and a condenser, carrying out magnetic stirring on the fabric in the treatment container, introducing nitrogen into the treatment container, adding 6g of diphenylmethane-4, 4' -diisocyanate in the nitrogen atmosphere, continuously stirring the mixture at 80-90 ℃ for 6 hours, thoroughly washing the fabric with acetone after the reaction is finished, and drying the fabric for later use.
Step 3): performing chitosan grafting treatment, namely grafting chitosan and the diphenylmethane-4, 4 '-diisocyanate unit on the fabric obtained in the step 2), and performing grafting reaction on the fabric obtained in the step 2) in a second treatment solution to obtain the diphenylmethane-4, 4' -diisocyanate-chitosan grafted fabric, wherein the second treatment solution comprises chitosan and DMAC;
step 4): performing acryloyl chloride grafting treatment, namely soaking the diphenylmethane-4, 4 '-diisocyanate-chitosan grafted fabric obtained in the step 3) into a third treatment solution containing acryloyl chloride and dichloromethane, and reacting to obtain the diphenylmethane-4, 4' -diisocyanate-chitosan-acryloyl chloride grafted fabric;
step 5): 1-vinyl imidazole grafting treatment, namely soaking the diphenylmethane-4, 4 '-diisocyanate-chitosan-acryloyl chloride grafted fabric obtained in the step 4) into a fourth treatment solution for grafting treatment, wherein the fourth treatment solution comprises DMF, 1-vinyl imidazole and azobisisobutyronitrile, and reacting to obtain the diphenylmethane-4, 4' -diisocyanate-chitosan-acryloyl chloride-1-vinyl imidazole grafted fabric.
Further, the fabric raw material treatment method in the step 1) comprises the steps of washing the fabric with acetone and deionized water, drying, and then carrying out activation treatment on the dried fabric raw material through low-temperature plasma equipment in an air atmosphere.
Further, the activation treatment is to subject the fabric raw material to plasma treatment under the power of 180W.
Further, the first treatment liquid comprises DMF and dibutyltin dilaurate.
Further, the second treatment liquid comprises chitosan, DMAC, acetic acid and dibutyltin dilaurate.
Further, the grafting reaction conditions in the step 3) are that the mixture is continuously magnetically stirred and reacted for 10h-12 h at 100 ℃ under the nitrogen atmosphere, then the product is washed for 5 times by acetone and dried for 2 h at 70 ℃ -80 ℃ to obtain the diphenylmethane-4, 4' -diisocyanate-chitosan grafted fabric.
Further, the reaction conditions in the step 4) are that the mixture is continuously reacted for 6 hours under magnetic stirring at 50-60 ℃, after the reaction is completed, the product is washed 5 times by dichloromethane and dried for 30min at 60 ℃.
Further, the reaction condition in the step 5) is that magnetic stirring is carried out for 24 hours at the temperature of 80-90 ℃ under nitrogen atmosphere, and after the reaction is finished, the diphenylmethane-4, 4' -diisocyanate-chitosan-acryloyl chloride-1-vinyl imidazole grafted fabric is obtained by washing with a methanol aqueous solution and then drying.
Example 3:
a preparation method of a durable antibacterial knitted fabric comprises the following steps:
step 1): treating a fabric raw material;
step 2): the method comprises the following steps of (1) carrying out graft treatment on diphenylmethane-4, 4 '-diisocyanate, soaking the fabric raw material obtained in the step 1) into a treatment container filled with a first treatment solution, wherein the treatment container is provided with a nitrogen inlet, a material outlet and a condenser, carrying out magnetic stirring on the fabric in the treatment container, introducing nitrogen into the treatment container, adding 5g of diphenylmethane-4, 4' -diisocyanate in the nitrogen atmosphere, continuously stirring the mixture at 80-90 ℃ for 6 hours, thoroughly washing the fabric with acetone after the reaction is finished, and drying the fabric for later use.
Step 3): performing chitosan grafting treatment, namely grafting chitosan and the diphenylmethane-4, 4 '-diisocyanate unit on the fabric obtained in the step 2), and performing grafting reaction on the fabric obtained in the step 2) in a second treatment solution to obtain the diphenylmethane-4, 4' -diisocyanate-chitosan grafted fabric, wherein the second treatment solution comprises chitosan and DMAC;
step 4): performing acryloyl chloride grafting treatment, namely soaking the diphenylmethane-4, 4 '-diisocyanate-chitosan grafted fabric obtained in the step 3) into a third treatment solution containing acryloyl chloride and dichloromethane, and reacting to obtain the diphenylmethane-4, 4' -diisocyanate-chitosan-acryloyl chloride grafted fabric;
step 5): 1-vinyl imidazole grafting treatment, namely soaking the diphenylmethane-4, 4 '-diisocyanate-chitosan-acryloyl chloride grafted fabric obtained in the step 4) into a fourth treatment solution for grafting treatment, wherein the fourth treatment solution comprises DMF, 1-vinyl imidazole and azobisisobutyronitrile, and reacting to obtain the diphenylmethane-4, 4' -diisocyanate-chitosan-acryloyl chloride-1-vinyl imidazole grafted fabric.
Further, the fabric raw material treatment method in the step 1) comprises the steps of washing the fabric with acetone and deionized water, drying, and then carrying out activation treatment on the dried fabric raw material through low-temperature plasma equipment in an air atmosphere.
Further, the activation treatment is to subject the fabric raw material to plasma treatment under the power of 150W.
Further, the first treatment liquid comprises DMF and dibutyltin dilaurate.
Further, the second treatment liquid comprises chitosan, DMAC, acetic acid and dibutyltin dilaurate.
Further, the grafting reaction conditions in the step 3) are that the mixture is continuously magnetically stirred and reacted for 11h at 95 ℃ under a nitrogen atmosphere, and then the product is washed 4 times with acetone and dried for 2 h at 80 ℃ to obtain the diphenylmethane-4, 4' -diisocyanate-chitosan grafted fabric.
Further, the reaction conditions in the step 4) are that the mixture is continuously reacted for 5 hours under magnetic stirring at 55 ℃, and after the reaction is completed, the product is washed 5 times by dichloromethane and dried for 30min at 60 ℃.
Further, the reaction condition in the step 5) is that magnetic stirring is carried out for 24 hours at 90 ℃ under nitrogen atmosphere, and after the reaction is finished, the diphenylmethane-4, 4' -diisocyanate-chitosan-acryloyl chloride-1-vinyl imidazole grafted fabric is obtained by washing with a methanol aqueous solution and then drying.
According to the diphenylmethane-4, 4 '-diisocyanate-chitosan-acryloyl chloride grafted fabric, the diphenylmethane-4, 4' -diisocyanate and organic groups in fabric fibers have good binding force, and chitosan with an antibacterial effect can be firmly bound to the surface of the fabric, so that the antibacterial performance of the fabric has certain durability, and the fabric still has a strong enough antibacterial property even after being used and washed for multiple times; the acryloyl chloride can also promote the chitosan to fully exert the antibacterial effect of the chitosan, and further enhance the antibacterial performance of the fabric. According to the invention, the 1-vinyl imidazole is grafted on the acryloyl chloride, the 1-vinyl imidazole has washing resistance and slow release property, and for knitted fabrics with coil structures, the existence of the 1-vinyl imidazole can effectively improve the washing resistance of the antibacterial knitted fabrics, enables the antibacterial substances to have certain slow release property, and further improves the duration time of the antibacterial effect of the antibacterial knitted fabrics.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (9)
1. A preparation method of a durable antibacterial knitted fabric is characterized by comprising the following steps:
step 1): treating a fabric raw material;
step 2): performing graft treatment on diphenylmethane-4, 4 '-diisocyanate, namely soaking the fabric raw material obtained by the treatment in the step 1) into a treatment container filled with a first treatment solution, wherein the treatment container is provided with a nitrogen inlet, a material outlet and a condenser, magnetically stirring the fabric in the treatment container, introducing nitrogen into the treatment container, adding 3-6g of diphenylmethane-4, 4' -diisocyanate in the nitrogen atmosphere, continuously stirring the mixture at 80-90 ℃ for 5-6 hours, thoroughly washing the fabric with acetone after the reaction is finished, and drying the fabric for later use;
step 3): performing chitosan grafting treatment, namely grafting chitosan and the diphenylmethane-4, 4 '-diisocyanate unit on the fabric obtained in the step 2), and performing grafting reaction on the fabric obtained in the step 2) in a second treatment solution to obtain the diphenylmethane-4, 4' -diisocyanate-chitosan grafted fabric, wherein the second treatment solution comprises chitosan and DMAC;
step 4): performing acryloyl chloride grafting treatment, namely soaking the diphenylmethane-4, 4 '-diisocyanate-chitosan grafted fabric obtained in the step 3) into a third treatment solution containing acryloyl chloride and dichloromethane, and reacting to obtain the diphenylmethane-4, 4' -diisocyanate-chitosan-acryloyl chloride grafted fabric;
step 5): 1-vinyl imidazole grafting treatment, namely soaking the diphenylmethane-4, 4 '-diisocyanate-chitosan-acryloyl chloride grafted fabric obtained in the step 4) into a fourth treatment solution for grafting treatment, wherein the fourth treatment solution comprises DMF, 1-vinyl imidazole and azobisisobutyronitrile, and reacting to obtain the diphenylmethane-4, 4' -diisocyanate-chitosan-acryloyl chloride-1-vinyl imidazole grafted fabric.
2. The method as claimed in claim 1, wherein the fabric material treatment method of step 1) is that after the fabric is washed with acetone and deionized water and dried, the dried fabric material is activated by passing through a low temperature plasma device under an air atmosphere.
3. The method according to claim 2, wherein the activation treatment is a plasma treatment of the textile raw material at a power of 120W to 180W.
4. The method of claim 1, wherein the first treatment fluid comprises DMF, dibutyltin dilaurate.
5. The method of claim 1, wherein the second treatment fluid comprises chitosan, DMAC, acetic acid, dibutyl tin dilaurate.
6. The method according to claim 5, wherein the grafting reaction conditions in the step 3) are that the mixture is reacted under nitrogen atmosphere at 90-100 ℃ for 10-12 h with continuous magnetic stirring, and then the product is washed with acetone 3-5 times and dried at 70-80 ℃ for 1-2 h to obtain diphenylmethane-4, 4' -diisocyanate-chitosan grafted fabric.
7. The method as claimed in claim 1, wherein the reaction conditions in the step 4) are that the mixture is continuously reacted for 4-6 h under magnetic stirring at 50-60 ℃, and after the reaction is completed, the product is washed 4-5 times with dichloromethane and dried for 30min at 60 ℃.
8. The method as claimed in claim 1, wherein the reaction condition in the step 5) is magnetic stirring at 80-90 ℃ for 24 hours under nitrogen atmosphere, and after the reaction is completed, the diphenylmethane-4, 4' -diisocyanate-chitosan-acryloyl chloride-1-vinyl imidazole grafted fabric is obtained by washing with aqueous methanol solution and drying.
9. Durable antibacterial knitted fabric, characterized in that it is produced by the process according to any one of claims 1 to 8.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114561810A (en) * | 2022-03-07 | 2022-05-31 | 中国科学院长春应用化学研究所 | Antibacterial anti-mite fabric and preparation method thereof |
| CN115434062A (en) * | 2022-10-08 | 2022-12-06 | 仙桃市融祥无纺布制品有限公司 | Preparation method of moisture-absorbing sweat-releasing antibacterial fabric |
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| JP2000038403A (en) * | 1998-07-24 | 2000-02-08 | Showa Denko Kk | New chitosan derivative and its use |
| CN101956318A (en) * | 2010-09-26 | 2011-01-26 | 中国人民解放军第四军医大学 | Method of chemically grafting and stabilizing biological coating macromolecules on polyester fibre surface |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114561810A (en) * | 2022-03-07 | 2022-05-31 | 中国科学院长春应用化学研究所 | Antibacterial anti-mite fabric and preparation method thereof |
| CN115434062A (en) * | 2022-10-08 | 2022-12-06 | 仙桃市融祥无纺布制品有限公司 | Preparation method of moisture-absorbing sweat-releasing antibacterial fabric |
| CN115434062B (en) * | 2022-10-08 | 2023-12-12 | 上海悠途实业有限公司 | Preparation method of moisture-absorbing sweat-releasing antibacterial fabric |
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