Functional Organic Materials & Devices and ‡Polymer Technology, Eindhoven University of Technology , P.O. Box 513, 5600 MB Eindhoven, The Netherlands.
ACS Appl Mater Interfaces. 2017 Sep 20;9(37):32161-32167. doi: 10.1021/acsami.7b10198. Epub 2017 Sep 5.
A photonic shape memory polymer film that shows large color response (∼155 nm) in a wide temperature range has been fabricated from a semi-interpenetrating network of a cholesteric polymer and poly(benzyl acrylate). The large color response is achieved by mechanical embossing of the photonic film above its broad glass transition temperature. The embossed film, as it recovers to its original shape on heating through the broad thermal transition, exhibits multiple structural colors ranging from blue to orange. The relaxation behavior of the embossed film can be fully described using a Kelvin-Voigt model, which reveals that the influence of temperature on the generation of colors is much stronger than that of time, thereby producing stable multiple colors.
一种光子形状记忆聚合物薄膜，由胆甾相聚合物和聚（苯乙烯丙烯酸酯）的半互穿网络制成，在很宽的温度范围内表现出较大的颜色响应（约 155nm）。这种大的颜色响应是通过在光子薄膜的宽玻璃化转变温度以上进行机械压花实现的。压花薄膜在通过宽的热转变加热恢复到原始形状时，会显示出从蓝色到橙色的多种结构颜色。压花薄膜的松弛行为可以用凯夫文-沃格特模型来完全描述，该模型表明温度对颜色产生的影响比时间强得多，从而产生稳定的多种颜色。
