摘要
为了深入研究前期工作中发现的芳伯胺化合物对蚕丝丝素蛋白的修饰作用,选用氨基芳磺酸染料为修饰显色剂,探讨甲醛参与下蚕丝丝素蛋白Mannich反应修饰的电荷效应。文章测定并分析了反应条件下脱胶蚕丝和氨基芳磺酸染料的带电荷特性,研究了pH值、甲醛、元明粉对Mannich反应修饰效率的影响。研究结果表明,当pH值为4时修饰效率最高,此时脱胶蚕丝织物显正电性,氨基芳磺酸染料显负电性,在相反电荷引力作用下发生物理性吸附,且此时处于弱酸条件下,更有利于发生Mannich反应修饰。在pH值小于等于4时,元明粉则随蚕丝的带电性不同而呈现缓染或在pH值大于等于5时促染作用,但对Mannich反应修饰效率影响较小。
For the further study of the modification effect on silk fibroin protein by aromatic primary amine compounds found in our previous work,the self-synthesized aminoaromatic sulfonic acid dye was used as the color developing agent to discuss the charge effect after Mannich reaction with silk fibroin protein under the existence of formaldehyde.In this paper,the isoelectric points of degummed silk and the aminoaromatic sulfonic acid dye under the reaction conditions were measuredand analyzed.Besides,the effects of pH,formaldehyde and sodium sulfate on Mannich reaction and modification efficiency were studied.It demonstrated that the highest efficiency appeared when pH was 4.Under this condition,the surface of the degummed silk fabric was positively charged,and aminoaromatic sulfonic acid dye showed negative charge,resulting in remarkable physical adsorption under electrostatic attraction.Meanwhile,the dye bath of weak acid was beneficial to the Mannich reaction.Sodium sulfate retarded dyeing(pH≤4)or accelerated dyeing(pH≥5),and made a little difference on the modification efficiency of the Mannich reaction.
作者
赵玲
崔志华
陈维国
江华
高普
孙岩峰
ZHAO Ling;CUI Zhihua;CHEN Weiguo;JIANG Hua;GAO Pu;SUN Yanfeng(Engineering Research Center for Ecological Dyeing and Finishing Technology,Ministry of Education,Zhejiang Sci-Tech University,Hangzhou 310018,China;Key Laboratory of Advanced Textile Materials and Manufacturing Technology,Ministry of Education,Zhejiang Sci-Tech University,Hangzhou 310018,China;Zhengjiang Ji-Hua Group Co.,Ltd.,Hangzhou 311227,China)
出处
《丝绸》
CAS
CSCD
北大核心
2018年第3期21-26,共6页
Journal of Silk
基金
国家自然科学基金项目(51673176)
浙江省自然科学基金项目(LY16B060006)
关键词
蚕丝
等电点
电荷效应
氨基芳磺酸
Mannich反应修饰
silk
isoelectric point
charge effect
aminoaromatic sulfonic acid
Mannich reaction modification
