荧光增白剂对天然棕色棉色泽的影响及作用机制-《现代纺织技术》(2022年5期).docx

龙源版权所有 荧光增白剂对天然棕色棉色泽的影响及作用机制作者：黄鑫涛，马明波，周文龙来源：《现代纺织技术》2022年第05期 摘要：为了探究荧光增白剂（FWA）对天然棕色棉（NBC）色泽的影响，采用具有不同带电基团的双三嗪氨基二苯乙烯型荧光增白剂对天然棕色棉进行处理，通过对样品的相关颜色性能进行测试分析，并进一步研究荧光增白剂对棕色棉色素的作用机制。結果表明：末端带正电基团的双三嗪氨基二苯乙烯型荧光增白剂对NBC具有较好增深作用;FWA与NBC色素的作用反应并不是生成新物质的化学反应，而是在NBC上形成了物理吸附;静电作用力，范德华力和氢键等可以影响FWA对棕棉色素的物理作用。经过FWA处理过后的NBC颜色明显增深，色泽有明显改进，对天然棕色棉产品开发具有实用价值。 关键词：天然棕色棉;色素;颜色增深;荧光增白剂;带电基团 中图分类号：TS111.8文献标志码：A文章编号：1009-265X（2022）05-0181-07The effect of fluorescent whitening agent on color of natural brown cotton and its mechanism of action HUANG Xintao， MA Mingbo， ZHOU Wenlong （College of Textile Science and Engineering （International Institute of Silk）， Zhejiang Sci-Tech University， Hangzhou 310018， China）Abstract： In order to explore the effect of fluorescent whitening agent （FWA） on the color of natural brown cotton （NBC）， the natural brown cotton was treated with bis（triazing）aminostibene fluorescent whitening agents with different charged groups. The relevant color properties were tested and analyzed， and the mechanism of action of fluorescent whitening agent on brown cotton pigment was further studied. The results show that the bis（triazing）aminostibene fluorescent whitening agent with a positively charged group at the end has a good deepening effect on NBC; the interaction between FWA and NBC pigment is not a chemical reaction to generate new substances， but physical adsorption is formed on NBC; electrostatic force， van der Waals force and hydrogen bond can affect the physical effect of FWA on brown cotton pigment. The color of NBC treated with FWA is obviously darkened and the color is improved， which has practical value for the development of natural brown cotton products. Key words： natural brown cotton; pigment; color darkening; fluorescent whitening agent; charged group 天然彩色棉是棉纤维成熟时自身具有棕、绿等色彩的棉花统称，简称彩棉。彩棉制品在加工过程中无需染色，避免了染色加工时可能对水资源造成的污染和残留在纺织品上的有毒物质对人体的危害，是一种天然环保的面料。近些年来发现，天然彩色棉具有很好的生物活性，例如抗菌[1]和抗氧化[2]等功能，这些功能提升了这种环保纺织材料的应用价值。然而，天然彩色棉存在色泽不艳，颜色不纯，色素稳定性差，混纺以后颜色不突出等不足，影响了