Study On The Preparation, Structure And Properties Of Multi-functional Silk Via ATRP Method

Dimethyl Methaeryloyloxyethyl Phosphate(DMMEP) was grafted onto silk surface using 2-bromoisobutyryl bromide (BriB-Br) modified silk as macroinitiator,and CuBr/N,N,N',N",N"-pentamethyldiethylenetriamine (PMDETA) as catalyst system in aqueous medium via atom transfer radical polymerization (ATRP) method,and the flame retardant grafted silk(Silk-g-PDMMEP) was obtained. Then Silk-g-PDMMEP was used as macroinitiator to initiate dimethylaminoethyl methacrylate(DMAEMA) secondarily grafted onto silk surface. Multi-functional grafted silk(Silk-g-PDMMEP-b-PDMAEMA) with flame retardance,anti-bacterial property and wrinkle resistance was successfully prepared.The influence factors of reaction conditions of DMMEP grafted onto silk surface via ATRP method were discussed and the structure and properties of silk grafted with flame retardant were characterized. The multi-functional silk was characterized by ATR-FTIR,X-ray diffraction and scanning electron microscope (SEM),and its flame retardance,anti-bacterial property and other physical properties were also tested. The results showed that the two monomer (DMMEP ,DMAEMA) were successfully grafted onto silk surface via ATRP method. The grafting primarily happened at the amorphous region of silk fibroin and the grafted polymers uniformly distributed on the silk surface. Good flame resistance and antibacterial property were obtained after the grafting and the crease resistance of the grafted silk fabric was remarkably improved.