Dong Chen, Yue Xiaolei, Zhang Yaodu, Wang Yucheng, Ren Zhi-Hui, Guan Zheng-Hui
Key Laboratory of Synthetic and Nature Molecule of Ministry of Education, Shaanxi Key Laboratory for Carbon Neutral Technology, Department of Chemistry & Materials Science, Northwest University, Xi'an, 710127, P. R. China.
Macromol Rapid Commun. 2023 Oct;44(20):e2300281. doi: 10.1002/marc.202300281. Epub 2023 Aug 13.
Intelligent actuating materials have drawn enormous attention because of their potential applications in soft robots, smart sensors, bionics, etc. Aiming to integrate light, thermal, and humidity stimuli deformations and self-healing function into a single polymer, a smart actuating polyurethane material CPPU-50 is designed and successfully synthesized through co-polymerization of azobenzene-containing Azo-C , polyethylene glycol 200 (PEG200), and 4,4'-diphenylmethane diisocyanate (MDI) at a ratio of 1:1:2. The obtained polyurethane CPPU-50 exhibits good photoinduced bending, thermal responsive shape memory effect, humidity triggered deflections and self-healing properties. Furthermore, an actuator combining light and thermal stimuli is created and the self-healing CPPU-50 film can withstand the object of 1800 times without tearing. This work can pave a way for further development of long-lived multi-stimuli-responsive actuating devices and intelligent materials.
智能驱动材料因其在软机器人、智能传感器、仿生学等领域的潜在应用而备受关注。为了将光、热和湿度刺激变形以及自修复功能集成到单一聚合物中，通过以1:1:2的比例使含偶氮苯的Azo-C、聚乙二醇200（PEG200）和4,4'-二苯基甲烷二异氰酸酯（MDI）共聚，设计并成功合成了一种智能驱动聚氨酯材料CPPU-50。所获得的聚氨酯CPPU-50表现出良好的光致弯曲、热响应形状记忆效应、湿度触发的挠度和自修复性能。此外，还制造了一种结合光和热刺激的致动器，自修复的CPPU-50薄膜能够承受1800次物体按压而不撕裂。这项工作可为长寿命多刺激响应驱动装置和智能材料的进一步发展铺平道路。
