涂层
接触角
材料科学
沉浸式(数学)
脲醛
复合材料
纳米颗粒
超疏水涂料
化学工程
纳米技术
胶粘剂
图层(电子)
数学
纯数学
工程类
作者
Buyong Wu,Lin Ye,Zhao Zhang,Xiaowen Zhao
标识
DOI:10.1016/j.compositesa.2020.105831
摘要
A robust super-hydrophobic coating was constructed on the surface of urea–formaldehyde (UF) foams through a facile immersion process in SiO2 nanoparticle-dispersed ethanol solution with dodecyltrimethoxysilane (DTMS) as compatibilizer. By introduction of DTMS, strong hydrogen bonding interaction formed between SiO2 coating and UF foam. The UF-g-SiO2/DTMS foam showed a water contact angle (CA) of 157.2° and a sliding angle (SA) of 3°, and after long-term immersion, very slight change of CA and SA was observed, while the water absorption ratio was 36.89% lower than that of pristine sample, displaying durable super-hydrophobicity. The UF-g-SiO2/DTMS foam showed excellent self-cleaning ability. Introduction of DTMS improved the dispersion of SiO2 in solution and thus lots of bamboo shoot-shaped granular protrusions of SiO2 nanoparticles at micro/nano-scale formed on the foam surface during treatment process, while the strong interfacial interaction prevented SiO2 nanoparticles from falling off the foam after long-term immersion, and thus durable hydrophobicity was achieved.
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