摘要
传统的环境响应性光子晶体材料多是平面状的,其制备耗时、结构脆弱,大规模生产困难,难以适应便携式和可穿戴柔性设备的快速发展。本论文以商业的弹性高分子纤维为基地,以硬核软壳聚合物微球的浓缩分散液为涂料,通过简单而快速的浸涂法实现了应力变色的光子晶体纤维的连续制备(图1a)。聚合物微球独特的硬核软壳使得光子晶体结构强度高,并且无需其他处理就能实现应力变色,通过调控微球粒径就可以获得各种颜色的光子晶体纤维。这种简单快速的蘸涂法不但可以制备单根光子晶体纤维,也适用于各种形状的纤维基底,甚至是玻璃片、织物等其他类型的基底。该纤维在拉伸与回复过程中,其颜色改变快速而可逆,能够实现从红色到绿色、绿色到蓝色的转变,并且反复拉伸2000次,其颜色改变仍然快速而稳定。这种纤维能织成多种编织物,或编到织物中显示各种图案,同时实现颜色的变化。
A new strategy is demonstrated to continuously prepare dyeing-free mechanochromic fibers by dip-coating hard core–soft shell microspheres onto commercially available polymer fibers. The colors of these fibers can be easily controlled by varying the diameters of core–shell microspheres. This method is efficient and applicable for a variety of fibers with different diameters and cross-sectional shapes and a broad spectrum of polymer and inorganic substrates. The mechanochromic fibers exhibit obvious color changes such as from red to green and from green to blue under stretching, and these chromatic transitions are rapid, reversible and repeatable. They are further woven into well-designed patterns and fabrics for potential application in smart wearable textiles.
引文
[1]Sun,X.;Zhang,J.;Lu,X.;Fang,X.;Peng,H.Angew.Chem.Int.Ed.2015,54:3630.
[2]Zhang,J.;He,S.;Liu,L.;Guan,G.;Lu,X.;Sun,X.;Peng,H.J.Mater.Chem.C 2016,4:2127.