一种耐久性超疏水涂层的制备及其在玻璃纤维上的应用
Preparation of a durable superhydrophobic coating and its application on glass fibers
刘楠 1周春才1
作者信息
- 1. 同济大学材料科学与工程学院,上海 200092
- 折叠
摘要
玻璃纤维因其轻质高强的特性在建筑、航空航天等诸多领域有着广泛应用.然而,玻璃纤维较强的亲水性使其易在潮湿环境中吸收水分,导致力学性能降低,进而缩短使用寿命.为了提高玻璃纤维的耐久性并拓展其应用范围,采用乳液聚合法,在交联剂二乙二醇二丙烯酸酯(DEGDA)的作用下,利用甲基丙烯酸甲酯(MMA)和乙烯基三乙氧基硅烷(VTES)形成具有低表面能的球状聚合物交联网络结构,进而将硅烷偶联剂改性后的纳米SiO2粒子通过共价键与聚合物网络相连,在玻璃纤维表面构建了耐久性超疏水涂层.当有机硅组分VTES质量分数为30%,纳米SiO2组分质量分数为5%时,该涂层在玻璃纤维表面展现出优异的超疏水性,其水接触角可达154.6°±0.8°.经过10 d的酸碱溶液浸泡,48 h的紫外线照射和60次摩擦循环测试后,涂层的水接触角仍大于150°,表明该涂层具有良好的耐候性和机械耐久性.经过短暂的高温处理后,O2等离子体刻蚀的涂层可从超亲水状态恢复到超疏水状态,具有优异的自修复性能.实验结果表明,该涂层显著提高了玻璃纤维的耐久性,为玻璃纤维的长期稳定使用提供了有力保障.此外,该涂层还可应用于玻璃、泡沫铜、滤纸、海绵等多种基材,有望在更多领域得到广泛的应用.
Abstract
Glass fibers are widely used in various fields such as construction and aerospace due to their lightweight and high-strength properties.However,the strong hydrophilicity of glass fibers makes them prone to absorb moisture in humid environments,resulting in a decrease in mechanical properties and shortening service life.To improve the durability of glass fibers and expand their application range,employing emulsion polymerization with the crosslinking agent diethylene glycol diacrylate(DEGDA),a spheri-cal polymer crosslinked network structure with low surface energy was formed by using methyl methacrylate(MMA)and vinyl triethoxysilane(VTES).Subsequently,nano-SiO2 particles modified by silane coupling agent were covalently bonded to the polymer network,creating a durable superhydrophobic coating on the surface of glass fibers.When the organic silicone component VTES content is 30 wt%and the nano-SiO2 component content is 5 wt%,the coating exhibits excellent superhydrophobicity,with a water contact angle of 154.6°±0.8°.After immersion in acid-base solutions for 10 days,exposure to ultraviolet radiation for 48 hours,and 60 abrasion cycles,the water contact angle of the coating remains above 150°,indicating good weather resistance and mechanical durability.After a brief high-temperature treatment,the O2 plasma-etched coating can restore from a superhydrophilic state to a superhydrophobic state,demonstrating excellent self-healing properties.The experimental results show that this coating significantly enhances the durability of glass fibers,providing a robust guarantee for their long-term stable use.In addition,the coating can be used on a variety of substrates such as glass,copper foam,filter paper,sponges,etc.It is expected to be widely used in more fields.
关键词
超疏水涂层/交联结构/纳米SiO2/玻璃纤维/耐久性/耐候性/自修复Key words
superhydrophobic coating/crosslinked structure/nano-SiO2/glass fiber/durability/weather resistance/self-healing引用本文复制引用
出版年
2024
NETL
NSTL
万方数据