紫外辐照对丝素蛋白结构的影响及真丝抗紫外整理
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摘要
真丝纤维光稳定性较差,易发生黄变。文章选用丝素溶液和真丝织物,考察了紫外辐照对丝素蛋白和真丝纤维结构与性能的影响;应用纳米TiO_2抗紫外整理剂对真丝织物进行抗紫外整理,并评价了整理效果。结果表明,延长紫外辐照时间,丝素蛋白溶液色深增加,丝素相对分子质量增加,其原因可能与丝素中酪氨酸酚羟基氧化成醌类物质,丝素蛋白发生交联相关。优化后真丝织物抗紫外整理工艺如下:纳米TiO_2整理剂4%,轧余率90%,焙烘温度130℃,时间80 s。经上述整理后真丝织物UPF值达到50+,明显优于空白样,紫外老化测试中整理织物的黄度较低,强力下降也较少。
Silk fibers exhibit unsatisfactory light stability and easily cause yellowing in air. In this paper, fibroin solution and silk fabric were chosen to investigate the effects of ultraviolet(UV) irradiation on the structure and the performances of silk fibroin and silk fabric. Meanwhile, anti-UV finishing of silk fabric was carried out by using a nano-TiO_2 finishing agent, and the finishing effect was evaluated. The results revealed that extending UV irradiation time led to the increase in color depth of silk fibroin solution and the molecular weight of fibroin. The possible reason was that tyrosine phenolic hydroxyl group in fibroin was oxidized to quinone substances, and cross-linking happened to fibroin. After optimization, anti-UV finishing process of silk fabric is as below: nano-TiO_2 finishing agent 4%, pickup 90%, baking temperature 130 ℃, time 80 s. After the anti-UV finishing, the obtained UPF value of the silk fabric reached 50+, which was noticeably higher than that of the blank sample. Furthermore, the yellow value and strength loss for the finished silk fabric were also much lower compared to those of the blank sample.
Silk fibers exhibit unsatisfactory light stability and easily cause yellowing in air. In this paper, fibroin solution and silk fabric were chosen to investigate the effects of ultraviolet(UV) irradiation on the structure and the performances of silk fibroin and silk fabric. Meanwhile, anti-UV finishing of silk fabric was carried out by using a nano-TiO_2 finishing agent, and the finishing effect was evaluated. The results revealed that extending UV irradiation time led to the increase in color depth of silk fibroin solution and the molecular weight of fibroin. The possible reason was that tyrosine phenolic hydroxyl group in fibroin was oxidized to quinone substances, and cross-linking happened to fibroin. After optimization, anti-UV finishing process of silk fabric is as below: nano-TiO_2 finishing agent 4%, pickup 90%, baking temperature 130 ℃, time 80 s. After the anti-UV finishing, the obtained UPF value of the silk fabric reached 50+, which was noticeably higher than that of the blank sample. Furthermore, the yellow value and strength loss for the finished silk fabric were also much lower compared to those of the blank sample.
引文
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[11]李莉,张聚华,傅吉全.纳米TiO2/抗坏血酸对真丝织物防紫外整理研究[J].丝绸,2014,51(1):9-14.LI Li,ZHANG Juhua,FU Jiquan.Study on anti-UV finishing of real silk fabrics with Nano-TiO2/ascorbic acid [J].Journal of Silk,2014,51(1):9-14.
[2]QI C L,WANG P,CUI L,et al.Enhancement of antioxidant ability of Bombyx mori silk fibroins by enzymatic coupling of catechin [J].Applied Microbiology and Biotechnology,2016,100:1713-1722.
[3]范雪荣,李义有,刘靖宏.真丝织物的泛黄和防泛黄整理[J].印染助剂,1996,13(5):1-6.FAN Xuerong,LI Yiyou,LIU Jinghong.Yellowing and anti-yellowing finishing of silk fabrics [J].Textile Auxiliaries,1996,13(5):1-6.
[4]丁巧英.真丝织物的黄变及其防止方法[J].江苏丝绸,2007(6):7-10.DING Qiaoying.Yellowing of silk fabric and its prevention method [J].Jiangsu Silk,2007(6):7-10.
[5]李志军,王红英.纳米二氧化钛的性质及应用进展[J].广州化工,2006,34(1):23-25.LI Zhijun,WANG Hongying.Progress in the application and properties of Nano- TiO2 [J].Guangzhou Chemical Industry,2006,34(1):23-25.
[6]丁巧英.纳米TiO2及其与稀土复配物对真丝绸防紫外和防黄变功能的研究[D].苏州:苏州大学,2009.DING Qiaoying.Research on Anti-UV and Anti-Yellowing Properties of Silk Fabrics with Nano-TiO2 and RE/ Nano-TiO2 Composite [D].Suzhou:Soochow University,2009.
[7]刘华,封云芳.桑蚕丝素的辐射分解研究[J].浙江工程学院学报,2001,18(4):191-196.LIU Hua,FENG Yunfang.Studies on irradiation decomposition of mulberry silk fibroin[J].Journal of Zhejiang Institute of Science and Technology,2001,18(4):191-196.
[8]ZHOU Buguang,WANG Ping,CUI Li,et al.Self-crosslinking of silk fibroin using H2O2-horseradish peroxidase system and the characteristics of the resulting fibroin membranes [J].Applied Biochemistry and Biotechnology,2017,182(4):1548-1563.
[9]杨红英,潘宁,朱苏康.无机紫外线屏蔽剂的功能机理研究[J].东华大学学报(自然科学版),2003,29(6):8-14.YANG Hongying,PAN Ning,ZHU Sukang.Mechanism of inorganic UV blocking agents for fabrics[J].Journal of Donghua University(Natural Science),2003,29(6):8-14.
[10]蔡珍,黄钢,狄剑锋.纳米TiO2溶胶在棉织物防紫外线整理中的应用[J].棉纺织技术,2016,44(12):65-68.CAI Zhen,HUANG Gang,DI Jianfeng.Application of Nano-TiO2 sol on the anti-ultraviolet finishing of cotton fabric [J].Cotton Textile Technology,2016,44(12):65-68.
[11]李莉,张聚华,傅吉全.纳米TiO2/抗坏血酸对真丝织物防紫外整理研究[J].丝绸,2014,51(1):9-14.LI Li,ZHANG Juhua,FU Jiquan.Study on anti-UV finishing of real silk fabrics with Nano-TiO2/ascorbic acid [J].Journal of Silk,2014,51(1):9-14.
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