芳伯胺染料/甲醛复合修饰蚕丝的结构性能研究

摘要

基于三组分Mannich反应蛋白质修饰的基本原理,采用自制的芳伯胺染料作为修饰显色剂的手段,文章研究了芳伯胺染料/甲醛复合对蚕丝素蛋白发生共价键合修饰的同时,甲醛与蚕丝素蛋白氨基酸残基反应形成交联产物及其对蚕丝结构及性能的影响,为实现蛋白质材料功能化的修饰提供一定的理论依据.采用以氨基酸模拟蚕丝氨基酸残基与甲醛的反应,通过质谱和红外光谱等分析手段,表征了甲醛与蚕丝素蛋白中氨基酸残基之间的交联作用.通过测定蚕丝的断裂强力、断裂伸长、折皱回复角等物理指标,进一步揭示了甲醛与蛋白质氨基酸残基发生交联对蚕丝织物性能的影响.%Based on the basic principle of three-component Mannich reaction protein modification, the self-made aromatic primary amine dye was used as the color developing reagent. In this paper, aromatic amine dye/formaldehyde complex was covalently bonded to silk fabric. In addition, the cross-linking products formed by the reaction of formaldehyde solution with amino acid residues and their effects on the structure and properties of silk were studied to provide some theoretical basis for the realization of functionalization of protein material. Amino acid was applied to simulate the reaction of protein amino acid residues and formaldehyde. The cross-linking function between formaldehyde and amino acid residue in the protein was characterized by mass spectra and infrared spectroscopy. By measuring the tensile strength,elongation at break and wrinkle recovery angle of silk fabrics,the influence of cross-linking between formaldehyde and amino acid residue in the protein on silk fabric properties was further revealed.