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ABSTRACT
Bombyx mori silk fabrics are generally dyed with acid dyestuffs at high temperature, and it has the disadvantages of overmuch energy-consumption. In the present work, in situ coloring of silk fabric was performed using diazo salts of aromatic amines, aiming at achieving high color fastness with less energy consumption. Subsequently, graft copolymerization of methacrylatoethyl trimethyl ammonium chloride (DMC) with silk fabrics was carried out using ammonium persulfate (APS) initiator, for further endowing silk with antibacterial ability. The results from liquid chromatography-mass spectrometry (LC-MS), FTIR and Raman spectra verified the formation of the azo dyestuff from diazo salts and tyrosine model compound. The silk fabric exhibited high color depth and satisfactory color fastness after in situ coloring. For the fabric coupled with diazo salt of 4-vinylphenylamine (DVA), the introduced vinyl groups might further graft copolymerize with DMC, resulting in a noticeable antibacterial effect with the antibacterial ratio of 96.38%. Meanwhile, no strengthen loss was detected after the combination treatments. The combined use of in situ coloring and APS-initiated cascade antibacterial functionalization provides a novel and energy-saving approach for dyeing and functionalization of silk fabrics under mild treating conditions.
抽象
Bombyx mori丝织物一般在高温下用酸性染料染色，具有能耗过高的缺点. 在目前的工作中，使用芳香胺的重氮盐对丝织物进行原位着色，力求以更少的能耗实现高色牢度. 随后，利用过硫酸铵（APS）的引发剂对三甲基氯化铵（DMC）进行嫁接共聚，进一步增强丝绸的抗菌能力。液相色谱-质谱法（LC-MS）、FTIR和拉曼光谱的结果验证了安卓盐和酪氨酸模型化合物的偶氮染料的形成. 丝织品原位着色后，色深高，色牢度好。对于与4-乙烯基苯胺（DVA）的二氮盐结合的织物，引入的乙烯基组可能会进一步与DMC进行嫁接共聚，从而产生明显的抗菌效果，抗菌率为96.38%. 同时，联合治疗后未发现加强损失. 原位着色和APS启动的级联抗菌功能化相结合，为丝绸织物在温和处理条件下的染色和功能化提供了一种新颖节能的方法.