The Design Of Antibacterial Finishing Methods For Cotton Fabrics And The Reseach On The Biofilm Resisting Properties

Microorganisms can easily adhere onto clothing,home textile,medical bandage,wound dressing and other textiles.It was harmful to human's health.Therefore,the exploitation of excellent and durable antibacterial fabrics is very important.The biofilm formation is a major cause of the failure of antibacterial materials.Hence,several antibacterial finishing cotton fabrics were designed and optimized aiming to effectively suppress the formation of biofilm in our studies.1.zwitterionic polymers were grafted onto cotton fabrics via surface-initiated atom transfer radical polymerization?SI-ATRP?technology.First,the amino groups were introduced to the surface of cotton via reactive dye intermediate 2-chloro-4,6-diamino-1,3,5-triazine and the initiator was brought to the amino group subsequently.Finally,poly?sulfobetaine methacrylate??pSBMA?brushes were grafted onto cotton fabrics via SI-ATRP.The results suggested that the pSBMA-grafted cottons exhibited an excellent antifouling performance of the protein and bacteria.It is worth noting that 18.5%pSBMA-grafted cotton can maintain the excellent antifouling performance and the biofilm resisting properties in the long-term?120h?test.2.Sodium polymethacrylate?pNaMAA?were grafted onto cotton fabrics via ultraviolet?UV?-initiated polymerization technology and subsequently the silver nanoparticles were loaded on cotton through impregnation-thermal reduction method.The pNaMAA grafting ratio could be tuned by controlling the monomer concentration.The pNaMAA-grafted cotton fabric was hydrophilic and exhibited an excellent antifouling performance of the protein and bacteria,but the bacteria can still grow in the long-term cultivation.The AgNPs were tightly adhered to the cotton surface by coordination bonds with the carboxyl groups.The p NaMAA-grafted and AgNPs-loaded cotton fabric can maintain excellent antifouling performance.The bacteria reduction ratio was higher than 99.5%in long-term cultivation?8 days?.It was confirmed that cotton fabrics with outstanding biofilm resisting properties was successfully prepared.3.Dopamine were rapid deposited on the cotton fabric via solvent-assisted method and further functionalization was proceed to prepared cottons with high biofilm resistance.Decamethyl cyclopentasiloxane?D5?was selected as the solvent,and dopamine was insoluble in D5.Dopamine in D5 was apt to accumulate in the water film around cotton fibers,and the deposition on the surface was promoted.Through weighing,scanning electronic microscopy?SEM?and thermo gravimetric analysis?TGA?,it was confirmed that the D5-assisted deposition make the polydopamine coating smoother.Then,the AgNPs could be tightly adhered to the cotton surface by coordination bonds with the catechol groups of the polydopamine.Then,mPEG-NH₂ was grafted to the cotton via michael addition with the quinone functional groups.It was found that the mPEG/AgNPs modified cotton fabric had outstanding bacterial antifouling and biofilm resisting properties.