The cylinder-like shape is one of the most common shapes in geometry and polymer-silica composite particles have been one of the most commonly reported organic-inorganic composite particles, while cylinder-like polymer-silica composite particles are seldom reported in literature. In this work, we report a facile method to prepare cylinder-like polystyrene-silica (PS–SiO₂) composite particles by judicious combination of PVP-involved dispersion polymerization and magnetic stirring. First, spherical PS-SiO₂ composite particles were synthesized by dispersion polymerization of styrene in an ethanol/water mixture. Second, cylinder-like PS-SiO₂ composite particles were prepared by stirring the spherical PS-SiO₂ particles in a water medium in the presence of PVP. The effects of PVP molecular weight, PVP concentration, stirring rate, stirring time and stirring temperature on the morphology of the composite particles were investigated. Optimization of the stirring conditions allowed relatively high percentage (up to ~73%) of cylindrical particles to be achieved. This method is expected to expand the morphology library of polymer-silica composite particles.

圆柱状是几何学中最常见的形状之一，聚合物-二氧化硅复合颗粒是最常报道的有机-无机复合颗粒之一，而文献中很少报道圆柱状的聚合物-二氧化硅复合颗粒。在这项工作中，我们报告了一种通过PVP参与的分散聚合和磁力搅拌的明智组合来制备圆柱状聚苯乙烯-二氧化硅（PS-SiO ₂）复合颗粒的简便方法。首先，通过苯乙烯在乙醇/水混合物中的分散聚合来合成球形PS-SiO ₂复合颗粒。其次，通过搅拌球形PS-SiO ₂制备圆柱状PS-SiO ₂复合颗粒PVP存在下，水介质中的颗粒。研究了PVP分子量，PVP浓度，搅拌速率，搅拌时间和搅拌温度对复合颗粒形貌的影响。搅拌条件的优化允许获得相对较高百分比（最高约73％）的圆柱形颗粒。该方法有望扩展聚合物-二氧化硅复合颗粒的形貌库。