润湿
材料科学
石墨烯
嫁接
两亲性
接触角
纳米技术
表面粗糙度
化学工程
二极管
表面光洁度
杰纳斯
光电子学
复合材料
共聚物
聚合物
工程类
作者
Yanan Wang,Guantao Wang,Meihong He,Fu Liu,Mingguang Han,Tan Tang,Sida Luo
出处
期刊:Small
[Wiley]
日期:2021-09-14
卷期号:17 (42)
被引量:37
标识
DOI:10.1002/smll.202103322
摘要
Abstract Functional surfaces with tunable and patternable wettability have attracted significant research interests because of remarkable advantages in biomedicine, environmental, and energy storage applications. Based on combined defocusing and grafting strategy for processing laser‐induced graphene papers (LIGPs) with variable surface roughness (58.18–6.08 µm) and F content (0–25.9%), their wettability can be tuned continuously from superlyophilicity (contact angle CA ≈ 0 ° ) to superlyophobicity (CA > 150 ° ), for various liquids with a wide range of surface tensions from 27.5 to 72.8 mN m −1 . In addition to reaching multiple wetting characteristics including amphiphilic, amphiphobic, and hydrophobic–oleophilic states, three designable processes are further developed for achieving LIGPs with various wetting patterns, including hydrophilic arrays or channels, hydrophobic‐to‐hydrophilic gradients, and Janus. Activated by the customly designed structures and properties, multifunctional and multi‐scenario applications are successfully attempted, including 2D‐/3D‐ directional cell cultivation, water transportation diode, self‐triggered liquid transfer & collection, etc.
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