Preparation And Properties Of Antibacterial And Anti-bacterial Adhesion Cotton Fabrics Based On Free Radical Polymerization Initiated By Light-controlled Gox System

Antibacterial cotton fabrics are widely used in clothing,home textiles,medical and other fields.Ordinary antibacterial cotton fabrics will stick to dead bacteria after a period of use,contaminating the antibacterial surface,resulting in a decline in the antibacterial effect of the fabric.In order to solve this problem,a variety of technologies for constructing antibacterial and antibacterial adhesion materials have been developed in recent years,but there are relatively few researches and applications in the field of textiles.It is an important research direction of antibacterial textiles to develop textiles with antibacterial and antibacterial adhesion properties to improve the antibacterial properties and durability of fabrics.In this paper,an antibacterial and antibacterial adhesion polymer finishing agent that can react with fibers is prepared by initiating free radical polymerization by a light-controlled glucose oxidase system,and is finished on the surface of cotton fabrics by dipping or padding.(1)Preparation of enzyme-initiated antibacterial or antibacterial adhesion polymers and modification of cotton fabricsUsing the light-controlled glucose oxidase system,[2-(Methacryloyloxy)ethyl]dimethyl-(3-sulfopropyl)(SBMA)or 2-(Dimethylamino)ethyl methacrylate(DMAEMA)was polymerized with 3-(Trimethoxysilyl)propyl methacrylate(TMSPMA)to obtain silylmethoxy-containing antibacterial adhesion polymer P(TMSPMA-co-SBMA)and antibacterial polymer P(TMSPMA-co-DMAEMA).The two polymers are individually or co-finished on cotton fabrics by the dipping-baking method,and the silyl hydroxyl groups generated by the hydrolysis of the silyl methoxy groups are covalently cross-linked with the hydroxyl groups on the fibers.ATR-FTIR was used to test the surface chemical structure of the finished fabric,and strong and narrow C=O stretching vibration absorption peaks and Si-O stretching vibration absorption peaks were detected;The content and distribution of elements on the surface of cotton fabrics were tested by EDS.The content of N,S and Si elements on the surface of cotton fabrics treated with P(TMSPMA-co-SBMA)increased,and the content of elements of N and Si on the surface of cotton fabrics treated with P(TMSPMAco-DMAEMA)increased.The surface morphology of the finished cotton fabric was observed by SEM.After finishing,the surface grooves of the cotton fabric disappeared and became smooth.The above results indicated that the antibacterial or antibacterial adhesion polymers were successfully finished to cotton fabrics.The antibacterial rate of cotton fabrics treated with P(TMSPMA-co-DMAEMA)alone basically reached99.9%,and the antibacterial rate of cotton fabrics treated with P(TMSPMA-co-SBMA)alone was more than85%.The results of anti-living bacteria adhesion rate and live/dead bacteria fluorescence color development showed that P(TMSPMA-co-DMAEMA)or P(TMSPMA-co-SBMA)alone treated the surface of the fabric with less live bacteria,but there were a lot of dead bacteria on the surface of the former,the latter has less dead bacteria on the surface,indicating that the P(TMSPMA-co-DMAEMA)finishing fabric cannot prevent the adhesion of dead bacteria,and the P(TMSPMA-co-SBMA)finishing fabric can prevent the adhesion of live/dead bacteria.The mass ratio of monomer feeding m(TMSPMA):m(DMAEMA)is 2:3 and m(TMSPMA):m(SBMA)is 2:3,and the cotton fabric is co-finished according to the volume ratio of 1:2.The bacteria rate can reach more than 98%,the anti-living bacteria adhesion rate is about 81%,and it has a good anti-dead bacteria adhesion effect.(2)Preparation of enzyme-initiated antibacterial and antibacterial bifunctional block copolymers and modification of cotton fabricsReversible addition-fragmentation chain transfer radical polymerization(RAFT)reaction initiated by photo-controlled glucose oxidase system,and SBMA,DMAEMA and TMSPMA were used as monomers for stepwise polymerization to obtain a silylmethoxy-containing antibacterial and antibacterial adhesion bifunctional block copolymer Poly(TMSPMA-b-DMAEMA-b-SBMA).Then,it is finished to cotton fabric by two processes of dip-bake method or pad-bake method.By ATR-FTIR,SEM,EDS,the chemical structure and element content of the cotton fabric surface after finishing,and the change of fiber surface morphology were tested.Vibration absorption peak,Si and S element content increased,covered with a layer of film-like substance,indicating that the finishing agent was successfully introduced.Poly(TMSPMA-b-DMAEMA-bSBMA)finishing cotton fabrics finished by dipping-baking method or padding-baking method,the antibacterial rate is over 99.9% and 90% respectively,and the anti-living bacteria adhesion rate basically reaches 90% around and above 85%.The results of fluorescence color development of live/dead bacteria showed that a large number of live bacteria adhered to the surface of the unmodified cotton fabric,while there were fewer live and dead bacteria on the surface of the Poly(TMSPMA-b-DMAEMA-b-SBMA)finishing cotton fabric.Bacterial adhesion performance is good.In addition,the air permeability of the cotton fabrics finished with Poly(TMSPMA-b-DMAEMA-b-SBMA)decreased,but the tensile strength at break,tensile elongation at break and moisture permeability remained basically unchanged.After 20 standard washings,the poly(TMSPMA-b-DMAEMA-b-SBMA)finished fabrics had an antibacterial rate of 88.1%and 95.1% for S.aureus and E.coli,indicating that oly(TMSPMA-b-DMAEMA-b-SBMA)and the fiber have high bonding fastness and excellent washing resistance.