中国的高分子材料研究人员开发出一种聚丁二炔类材料，这种材料在加热或者冷却条件下可以再一秒内实现颜色的可逆转变。（聚丁二炔，polydiacetylene，PDA)）
（图片来源于文章底部参考文献）
热致色变聚合物材料有着广泛的潜在用途，比如生物传感器和智能玻璃。但是以往的的热致变色材料由于响应性慢和使用温度范围窄等因素，制约了热致变色聚合物材料的应用。
现在，由复旦大学邵正中（Zhengzhong Shao）领导的科研团队通过引入多肽侧链增强纤维的强度并且显著提高颜色变化的速度，即便温度高达200摄氏度。而且可以通过控制聚合物中的烷基链长度调节颜色变化的临界温度。
多肽不仅稳定丁二炔，而且能使材料自组装成纤维。加热时打破聚合物材料结构的共面结构，而且随着侧链数量的增加，这种影响更大，结果是改变了保持共轭结构链段的长度（影响对光谱的吸收），最终使材料发生了颜色变化。当不加热时，材料结构回复原状，材料颜色恢复。
多次热响应后，材料色度保持相对稳定，换言之，材料可以重复使用，颜色响应性并不降低。但是如果温度超过200摄氏度，多肽结构遭到破坏，这种材料就不在具有热致变色性质。
目前研究人员正期望能调节材料颜色发生变化的温度，如果未来应用与生物传感器，响应温度需要与体温相适应。另外，材料的加工性能也需要考虑。
（上述介绍内容，如有不对之处，敬请理解）
了解详细权威内容，欢迎大家阅读参考文献：
标题：Ultrafast and Reversible Thermochromism of Conjugated Polymer Material Based on Assembling of Peptide Amphiphiles
作者：Zhengzhong Shao, Hui Guo, Jinming Zhang, David Porter, Huisheng Peng, Dennis Lowik, Yu Wang, Zhidong Zhang and Xin Chen
摘要：The translation of the colour change in chameleon to synthetic functional materials has attracted increasing interests, and conjugated polymers such as polydiacetylenes that undergo chromatic transitions under heating represent one of the most studied systems. However, they suffer a slow and irreversible colour change typically at low temperatures, e.g., 50-90 °C, which limits their sensing applications. In addition, they appear in powders or films and cannot satisfy the wearable electronics, a mainstream direction in sensing. Herein, the introduction of peptide to the side chain enables a continuous polydiacetylene fibre to exhibit ultrafast, reversible thermochromatic transitions at a high temperature of 200 °C. In particular, the reversible thermochromism occurs even at a temperature change rate of 5000 K/s, much higher than typically around 1 K/s of the other sensing polymers. The formation of a hierarchically assembled structure is responsible for this remarkable chromatism. In addition, a general and effective model is discovered to quantitatively predict the critical temperature of the colour change in polydiacetylene and guide the development of chromatic materials.
原文链接：DOI: 10.1039/C4SC01696C