The Design And Synthesis Of New Antibacterial Finishing Agent And Surface Modification On Textile

Textile is closely related to people's life and is widely used in clothing,agriculture,construction,industry,transportation,aerospace,sports,medical and health fields.Porous textiles is easy to stick dust in the air and sweat produced by human skin,which provide microbes the environment containing water,nutrition,optimum temperature,and become medium of its rapid propagation and transmission.Microorganisms gather and breed on textiles can not only affect its own performance,but also can cause the body disease,and affect human health,so the fabric has important practical significance.In this paper,three kinds of antibacterial finishing agents were synthesized,the benzophenone quaternary ammonium salt BP-QAS was synthesized with 4-methyl benzophenone,N-Bromosuccinimide(NBS)and N,N-dimethylamine,etc.Isocyanate betaine ISB was synthesized with isopolone diisocyanate(IPDI),N,N-dimethyl ethanolamine(DMEA),1,3-propylsulfonate(1,3-PS),etc.Isocyanate quaternary ammonium salt IQAS was synthesized with N,N-dimethyl octadecylamine(DMOA),IPDI,3-bromine-1-propanol synthetic,etc.Through infrared spectrum(FTIR),nuclear magnetic resonance(~1H-NMR)characterized these molecular structures.BP-QAS was bonded to PET textile by chemical bond.The double finishing agent(ISB/IQAS=1/1)is sorted into cotton textiles by dipping,drying and baking.FTIR,X-ray photoelectron spectroscopy(XPS)and scanning electron microscope(SEM)were used to characterize the structure and morphology of the finished textiles.The antibacterial,washable,solubility and antibacterial efficiency of textiles were tested by means of oscillation,plate counting and bacteriostasis.At the same time,the hydrophilic,transmittance,permeability,moisture permeability,antistatic property,mechanical properties and thermal properties of textiles were analyzed.The anti-mites properties of modified PET textiles were studied by the method of avoiding and direct contact,and the toxicity of BP-QAS,ISB and IQAS was studied by using animal acute oral test and skin allergy test.The study shows that the antibacterial rate of the PET textiles treated by BP-QAS to E.coli and S.aureus were more than 99.99%,so the antibacterial effect is excellent.After the standard washing 50 times,the antibacterial effect of the textile is still AAA level,with good washing resistance.The modified textiles are safe and belong to non-dissolved fabric.PET fabric moisture permeability changed a little,light transmission,water absorption,air permeability,antistatic and mechanical properties have been improved or enhanced to varying degrees,and overall performance has improved.After textile finished,the rate of avoiding mites was 97.9%,the death rate was 99.9%,so the anti-mite effect was excellent.Toxicity tests showed that BP-QAS was a non-toxic substance from animal death,physiological characteristics,weight change,skin condition,histopathological section,etc.Research shows that the antibacterial rate of cotton textiles treated doubly with ISB,IQAS against E.coli and S.aureus were more than 99.99%,textile belonging to non-dissolution fabric,have great wash resistance,the antibacterial effect get to AAA level,and have excellent antibacterial adhesion.After the cotton textiles finished doubly,hydrophilic,permeability,fracture strength,tear strength,bursting strength and other performance improvements,the bending strength and surface smoothness of textiles are unchanged basically,moisture permeability,thermal properties are down a bit,but these changes do not affect the actual use.Toxicity tests also showed that ISB and IQAS were non-toxic substances from animal lethal amount,physiological characteristics,weight change,skin condition,histopathological section and other indicators.