Study On Novel Eco-friendly Anti-creasing Agents For Natural Silk Fabric

Three anti-creasing agents for natural silk fabric:2-(biscarboxymethyl)amino-4,6-dichloro-[1,3,5]-triazine (CMADCT),2,4-bis-(biscarboxymethyl)amino-6-chloro-[1,3,5]-triazine (BCMACT) and2,4,6-tris-(biscarboxymethyl)amino-[1,3,5]-triazine(TCMAT) were synthesized with cyanuric chloride and iminodiacetic acid as rawmaterials. Their structures were characterized by FTIR, NMR, MS and elementaryanalysis. Their solubility, thermal stability and application in anti-creasing finishing ofsilk have been studied. As anti-creasing agents for silk, CMADCT, BCMACT andTCMAT can provide the treated fabrics with higher wrinkle recovery degree, strengthretention rate and whiteness than BTCA. The fabrics treated with CMADCT, BCMACTand TCMAT show similar washing durability to those finished with BTCA. Thestructures of CMADCT, BCMACT and TCMAT determine the finished fabrics will notrelease formaldehyde in the process of depositing or wearing. The results suggest thatthe compounds containing at least one chlorine atom of CNC and two carboxyl groupsof IDA may be promising formaldehyde-free anti-creasing agents for silk. Moreover, themechanism of crease resistance of CMADCT, BCMACT and TCMAT was studied byFTIR, X-ray photoelectron spectroscopies and scanning electron microscope. Theresults indicate that the chlorine atom, the carboxyl and the s-triazine ring in thesynthesized structures and the surface roughness of the silk fabric are all contributive tothe improvement of the crease resistance of silk.