近日，哈尔滨工业大学的王富强及其研究小组与香港中文大学的Yi Long等人合作并取得一项新进展。经过不懈努力，他们提出用于在所有工作温度下同时实现智能太阳能传输和快速可见光隐身的仿生微模式热致变色水凝胶。相关研究成果已于2024年8月21日在国际知名学术期刊《光：科学与应用》上发表。

受鱿鱼皮肤的启发，该研究团队提出了一种微模式热致变色水凝胶（MTH），以实现所有工作温度下智能太阳透射率和快速可见光隐身（VLS）的同时控制。MTH具有两种光学调节机制：光学性质调节和光学散射，分别由温度和压力控制。

所采用的表面微模式策略能够在正常透射和漫透射之间任意切换，与之前的约180秒相比，VLS响应时间缩短至1秒内。MTH还具有高达61%的太阳透射率调节范围。此外，MTH的制备方法具有可扩展性和成本效益。这种新型调节机制为具有多功能光学要求的应用开辟了一条新途径。

据悉，热致变色水凝胶具有智能调节太阳光谱透射的能力，能够根据环境温度的变化自动改变其透射率，这对于节能具有重要意义。军事和民用应急热致变色应用需要快速实现可见光隐身（VLS）；然而，同时实现智能太阳光谱透射和快速可见光隐身尚待实现。

附：英文原文

Title: Bio-inspired micropatterned thermochromic hydrogel for concurrent smart solar transmission and rapid visible-light stealth at all-working temperatures

Author: Liang, Huaxu, Zhang, Xinping, Wang, Fuqiang, Li, Chunzhe, Yuan, Weizhe, Meng, Weifeng, Cheng, Ziming, Dong, Yan, Shi, Xuhang, Yan, Yuying, Yi, Hongliang, Shuai, Yong, Long, Yi

Issue&Volume: 2024-08-21

Abstract: Thermochromic hydrogels exhibit a smart capacity for regulating solar spectrum transmission, enabling automatically change their transmissivity in response to the ambient temperature change. This has great importance for energy conservation purposes. Military and civilian emergency thermochromic applications require rapid visible-light stealth (VLS); however, concurrent smart solar transmission and rapid VLS is yet to be realized. Inspired by squid-skin, we propose a micropatterned thermochromic hydrogel (MTH) to realize the concurrent control of smart solar transmittance and rapid VLS at all-working temperatures. The MTH possesses two optical regulation mechanisms: optical property regulation and optical scattering, controlled by temperature and pressure, respectively. The introduced surface micropattern strategy can arbitrarily switch between normal and diffuse transmission, and the VLS response time is within 1s compared with previous ~180s. The MTH also has a high solar-transmission regulation range of 61%. Further, the MTH preparation method is scalable and cost-effective. This novel regulation mechanism opens a new pathway towards applications with multifunctional optical requirements.

DOI: 10.1038/s41377-024-01525-y

Source: https://www.nature.com/articles/s41377-024-01525-y