Development of photochromic poly(azobenzene)/PVDF fibers by wet spinning for intelligent textile engineering
Development of photochromic poly(azobenzene)/PVDF fibers by wet spinning for intelligent textile engineering
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湿法纺丝光致变色聚偶氮苯/PVDF纤维的开发用于智能纺织工程
DOI：
10.1016/j.surfin.2022.102383
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发表时间：
2022
影响因子：
6.2
通讯作者：
John H. Xin
中科院分区：
文献类型：
--
作者：
Suju Fan;Yintung Lam;Jing Yang;Xueyan Bian;John H. Xin
与偶氮苯（AB）单体相比，AB聚合物具有更好的光致变色性能和耐化学性。以合成的AB聚合物和聚偏氟乙烯（PVDF）为原料，采用湿法纺丝工艺成功地制备出具有光致变色性能的智能纤维。在智能纤维中掺杂AB聚合物对PVDF纤维的本征性能影响不大，但显著改变了PVDF纤维的美观性、紫外敏感性和屏蔽性等表面性能。该智能纤维在紫外线照射下可以可逆地将颜色从浅黄色变为橙子红色，从而赋予成为柔性紫外线指示剂的潜力。used.as作为织物上的功能性绣花线，光致变色聚偏氟乙烯纤维表现出稳定的光致变色响应、可逆的光学对比度和良好的光致变色动力学，大大改善了底布的外观和功能性。用该光致变色纤维针织的织物具有良好的紫外线屏蔽性能，其紫外线防护系数较高。此外，该功能纤维具有良好的耐溶剂性，因此，它表现出的品质，在苛刻的条件下使用。相对于螺吡喃（SPs）和螺恶嗪（SOs）在变色纺织品中的广泛研究，本研究将是偶氮苯（ABs）在智能纺织品中应用的补充研究。
Compared to azobenzene (AB) mono-molecule, the as-synthesized AB polymer showed better photochromic.ability and chemical resistance. An intelligent fiber with photochromic properties can be successfully developed.with the as-synthesized AB polymer and polyvinylidene fluoride (PVDF) via a facile wet spinning process. The.doping of AB polymer in intelligent fiber showed little effect on intrinsic properties of PVDF fiber but significantly.altered the surface performances like aesthetics, UV sensing and shielding. The intelligent fiber could.reversibly change the color from pale yellow to orange red under UV irradiation, conferring a potential to be used.as a flexible UV indicator. As a functional embroidery thread on fabric, the photochromic PVDF fiber displayed.stable photochromic responses, reversible optical contrast and good photo-coloration kinetics, greatly improving.the appearance and functionality of the substrate fabric. Moreover, the fabric knitted with this photochromic.fiber could offer UV shielding property verified with the high ultraviolet protection factor. Furthermore, the.functional fiber had good resistance to different solvents, thus, it exhibited qualities to be used under harsher.conditions. Compared with the extensive research of spiropyrans (SPs) and spirooxazines (SOs) in color-changing.textile, this study would be a complementary research for the application of azobenzenes (ABs) in intelligent.textiles.