期刊
ACS APPLIED MATERIALS & INTERFACES
卷 13, 期 30, 页码 36621-36631出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.1c10482
关键词
superhydrophobicity; light stimuli-responsive actuation; mismatched deformation; electric switch; water-droplet manipulation
资金
- Natural Science Foundation of Guangdong Province, China [2018A030313884]
This study presents a light stimuli-responsive superhydrophobic film with large and sensitive deformed actuations driven by light stimuli, which exhibits high sensitivity, great repeatability, and superhydrophobicity. The film can be used for water-droplet manipulation and designed as an electric switch for remotely controlling circuits.
Fabrication of superhydrophobic films with large and sensitive deformed actuations driven by light stimuli for the emerging application fields such as biomimetic devices, artificial muscles, soft robotics, electric switches, and water-droplet manipulation remains challenging. Herein, a facile strategy is proposed to fabricate a light stimuli-responsive superhydrophobic film (LSSF) by integrating a bottom carbon nanotube/poly(vinylidene fluoride) (CNT/PVDF) layer, a middle chitosan (CS) layer, and a top superhydrophobic fumed silica-chitosan (SiO2/CS) layer modified with 1H,1H,2H,2H-heptafluorodecyltrimethoxysilane (FAS). Under near-infrared (NIR) light irradiation, the LSSF quickly bent toward the CS layer with a large bending angle (>200 degrees), high sensitivity (similar to 7 degrees C change), and great repeatability (>1000 cycles), which was attributed to the significant difference in the coefficient of thermal expansion (CTE) between CS and PVDF and the water desorption-induced volume shrinking in the CS layer. Furthermore, the LSSF also exhibited superhydrophobicity with a high water contact angle of 165 degrees and a low water sliding angle of 2.8 degrees. Importantly, owing to the high light absorption of CNTs, the LSSF-based biomimetic flower was able to not only bloom under NIR light exposure but also normally work when applying sunlight irradiation. Thanks to the electric conductivity and excellent water repellency, the LSSF was capable of being designed as an electric switch to remotely turn on/off the circuit even under a watery environment, and the LSSF was further successfully applied in water-droplet manipulation. The findings conceivably provided a new strategy to fabricate light stimuli-responsive superhydrophobic films for versatile applications.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据