材料科学
接触角
生物污染
化学工程
结垢
超疏水涂料
复合材料
表面能
摩擦电效应
自愈
纳米技术
化学
替代医学
病理
膜
工程类
医学
生物化学
作者
Ruiqi Li,Lixue Yang,Changqing Zhou,Guoli Zhang,Jiaxiang Tian,WU Wen-cong
标识
DOI:10.1016/j.mtchem.2021.100730
摘要
The loss of superhydrophobicity due to mechanochemical damage is critical for superhydrophobic surfaces, and rapid self-healing is significant in maintaining surface durability. Herein, a novel, fast, self-healing superhydrophobic sponge capable of all-weather heating was polymerized in an eco-friendly aqueous system and dip-coated using fluorine-free and non-toxic reagents. Benefiting from the photothermal and Joule-heating performance of polyaniline (PANI) and multiwalled carbon nanotubes (MWCNTs), all-weather heating could be achieved. The equilibrium surface temperature (EST) of the as-prepared sponge could rapidly reach 105°C under irradiation of 1.0 kW/m2 for 20 s, and the EST exceeded 120°C with supplementary 18 V treatment. Impressively, after O2 plasma etching for 1 min or after being immersed in hydrogen peroxide (H2O2) solution for 24 h, the water contact angle (WCA) of self-healing superhydrophobic polyurethane (PU) sponge (SHSPS) can be restored to 155°C under simulated sunlight for 2 min because of the rapid migration of low surface energy polydimethylsiloxane (PDMS) chains, which is the fastest recovery achieved to the best of our knowledge. In addition, the modified sponge exhibited a significant antifouling capability for particulate contaminants and organic pollutants, extending service life. Our preliminary results demonstrated that the modified sponge prepared in the current work is fully qualified in multiple applications, including oil-water separation, viscous oil treatment, seawater evaporation and desalination, de-icing, and anti-icing.
科研通智能强力驱动
Strongly Powered by AbleSci AI