Colloid and Polymer Science ( IF 2.2 ) Pub Date : 2021-09-13 , DOI: 10.1007/s00396-021-04891-w Lu Xu 1 , Di Wu 1 , Baijun Liu 1 , Mingyao Zhang 1 , Hongjuan Jin 2
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In this work, monodisperse positively charged polystyrene (PS) particles with a particle size of 900 nm were prepared by dispersion polymerization using methacryloxyethyltrimethyl ammonium chloride (DMC) as a cationic comonomer. The polystyrene/silica (PS/SiO2) composite microspheres with a raspberry structure are formed by electrostatic adsorption prepared using positively charged PS adsorbed negatively charged silicon dioxide (SiO2). A novel superhydrophobic coating was constructed by a dip-coating method. Then, the coating film was immersed in a solution of heptadecafluorodecyl trimethoxysilane in n-hexane (0.1 wt%) to carry out surface superhydrophobic modification. Finally, a superhydrophobic coating with 158° static contact angle and 3° sliding angle was obtained. In addition, by adding divinylbenzene (DVB) and changing the amount and size of SiO2, the effect of the roughness level and cross-linking structure of raspberry particles on the hydrophobic properties of the coating was studied.
Graphical abstract
Mechanism diagram of superhydrophobic coating prepared by PS/SiO2 composite particles.
中文翻译：
基于覆盆子结构颗粒相分离的超疏水聚苯乙烯涂层
在这项工作中，使用甲基丙烯酰氧基乙基三甲基氯化铵 (DMC) 作为阳离子共聚单体，通过分散聚合制备了粒径为 900 nm 的单分散带正电聚苯乙烯 (PS) 颗粒。聚苯乙烯/二氧化硅（PS /二氧化硅2与覆盆子结构的复合微球通过静电吸附而形成）使用带正电荷的吸附的PS带负电的二氧化硅（SiO制备2）。通过浸涂方法构建了一种新型的超疏水涂层。然后，将涂膜浸入十七氟癸基三甲氧基硅烷的正己烷溶液（0.1wt%）中进行表面超疏水改性。最后，获得了具有 158° 静态接触角和 3° 滑动角的超疏水涂层。此外，通过加入二乙烯基苯(DVB)，改变SiO 2的用量和粒径，研究了覆盆子颗粒的粗糙度和交联结构对涂层疏水性能的影响。
图形概要
PS/SiO 2复合颗粒制备超疏水涂层的机理图。
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