纳米杂化耐磨超疏水环氧树脂涂层的构筑及性能

Construction and properties of nano-hybrid wear-resistant superhydrophobic epoxy coating

摘要:

采用层层组装法通过十八烷基胺（C18-NH2）、正硅酸乙酯（TEOS）、γ-甲基丙烯酰氧基丙基三甲氧基硅烷（KH-570）合成出长链烷基改性纳米粒C18-NH2/570@SiO2，将其引入有机硅改性环氧树脂，制备得到耐摩擦性能优异的超疏水环氧树脂涂层C18-NH2@SiO2/DE51。采用FT-IR、XRD、XPS、TEM、AFM等对纳米粒子的结构以及涂层的成膜形貌进行表征。结果表明，长链烷基纳米粒成功引入聚合物链段中，并且涂层表面喷涂C18-NH2/570@SiO2后表面粗糙度明显提高。通过接触角、透光率、自清洁、耐酸碱和耐摩擦测试表明，当喷涂质量分数为0.8%的纳米粒子时，改性后的环氧树脂涂层接触角可以达到150.6±0.6°，滚动角可达到7.8±0.4°，透光率可达到91.98%，拥有良好的自清洁、耐酸碱和耐摩擦性能并且摩擦次数可达到1500次以上。

Abstract:

Long-chain alkyl-modified nanoparticles C18-NH2/570@SiO2 were synthesized by octadecylamine (C18-NH2), ethyl orthosilicate (TEOS) and γ-methacryloyloxypropyltrimethoxysilane (KH-570) by layer-by-layer assembly method, and introduced into silicone-modified epoxy resin to obtain a superhydrophobic epoxy resin coating C18-NH2@SiO2/DE51 with excellent friction resistance. FT-IR, XRD, XPS, TEM, AFM, etc. were used to characterize the structure of nanoparticles and the film-forming morphology of coatings. The results showed that the long-chain alkyl nanoparticles were successfully introduced into the polymer segment, and the surface roughness was significantly improved after coating C18-NH2/570@SiO2. Through contact angle, light transmittance, self-cleaning, acid and alkali resistance and friction resistance tests, it is shown that when the mass fraction of nanoparticle spraying is 0.8%, the contact angle of the modified epoxy resin coating can reach 150.6±0.6°, and the rolling angle can reach 7.8±0.4°, the light transmittance reaches 91.98%, and it has good self-cleaning, acid and alkali resistance and friction resistance, and the friction number can reach more than 1500 times.