The Synthesis And Application Of Natural Fiber Anti-wrinkle Agents

Generally, there exists problems of formaldehyde residue and poor washing fastness of crease resistance properties during the anti-wrinkle finishing of natural fabrics——cotton fabrics and silk fabrics. New reactive formaldehyde- free anti-wrinkle agents BTP series bearing two reactive groups of dichlorophenyltriazine was synthesized with cyanuric chloride and various molecular weights of polyethylene glycols. The reactive groups of this anti-wrinkle agent could react with fibers and was aimed at forming three-dimensional network and covalent crosslinks structures, then suppress the slip of fiber molecular chains, thereby, “formaldehyde-free anti-wrinkle” and the improvement of anti-wrinkle properties of fibers could both be achieved.Based on the reaction principle of cyanuric chloride and higher alcohols, three different molecular weights of non-ionic water-soluble formaldehyde-free anti-wrinkle finishing agent BTP series(BTP200 ? BTP400 ? BTP600) which beared two reactive groups of dichlorophenyltriazine was synthesized with cyanuric chloride and various molecular weights of polyethylene glycols(PEG200?PEG400?PEG600). There were two reactive groups in BTP which could crosslink with natural fibers covalently.Appling BTP series to the anti-wrinkle finishing of cotton and silk fabrics, the energy dispersive spectrometer demonstrateed that BTP was capable of covalently bonded with fibers. It was found that the anti-wrinkle effect of BTP400 was best by compared to the process conditions and finishing effect of different molecular weights of finishing agents. DCRA of finished cotton fabrics was increased from 141° to 203°, WC RA was increased from 119° to 142°, DCRA of finished silk fabrics was increased from 228° to 302°, WCRA was increased from 179° to 201°, compared with CRA of fabrics finis hed by other finishing agents, the anti-wrinkle effect of silk fabrics finished by BTP400 has obvious advantages, and the anti-wrinkle effect of finished cotton fabrics were relatively slightly weaker.The whiteness of cotton and silk fabrics finished by BTP400 was respectively 1.7 and 70.1, and the breaking strength retention was respectively 97.5% and 98.1%, and there was little change between raw and finished fabrics, it was better than other finishing agents; after washed for 50 times, the DCRA and WCRA decreased within 2.5% than washed before, so BTP400 had good washing fastness of crease resistance properties. Furthermore, there were no formaldehyde risks in fabrics finished by BTP400, and design features of this additive was expected to develop into a new environment-friendly non-formaldehyde anti-wrinkle agent.