碳纳米管
材料科学
复合数
壳聚糖
执行机构
复合材料
复合薄膜
变形(气象学)
纳米管
纳米技术
化学工程
计算机科学
人工智能
工程类
作者
Hang Xu,Xiuzhu Xu,Jiawei Xu,Shengping Dai,Xu Dong,Feng Han,Ningyi Yuan,Jianning Ding
摘要
Actuating materials can convert external stimuli (humidity, light, electricity, etc.) into mechanical energy and realize multiple forms of movements. However, a majority of current actuating materials are driven by a single stimulus with a small degree of actuation and rough control which is unfavorable for practical applications. Here, a new type of bidirectional actuating material based on carbon nanotube/PDMS composites and chitosan films is proposed. Thanks to the robust mechanical support by PDMS, due to the ultra-large water capacity in between chitosan chains and strong near-infrared light absorption by carbon nanotube layers, the actuator can be driven by humidity and light for an ultra-large actuation curvature (3.91 cm-1 in humidity actuation, 3.84 cm-1 in light actuation). The well-established light power-curvature, relative humidity-curvature profiles and a fine mechanic modelling of the actuator show the possibility of controlling the actuator's bending. A lab application as a cargo-moving device preliminarily demonstrates a robust mechanical functionality of this actuator with a low body weight.
科研通智能强力驱动
Strongly Powered by AbleSci AI