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首页> 外文期刊>Journal of Macromolecular Science. Pure and Applied Chemistry >Preparation of PS colloids with DMA and MMA comonomers and suitability of P(S/DMA) for colloidal silica deposition
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Preparation of PS colloids with DMA and MMA comonomers and suitability of P(S/DMA) for colloidal silica deposition

机译：具有DMA和MMA共聚单体的PS胶体的制备以及P（S / DMA）对硅胶沉积的适用性

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There is a lack of investigation on the effects of hydrophilic comonomer and pH on the particle size of functionalized polystyrene colloids. In this study, polystyrene (PS) colloids were prepared via emulsifier-free emulsion copolymerization of styrene (S) with 2-(dimethylamino)ethyl methacrylate (DMA) and methyl methacrylate (MMA) at pH 3.0 and 7.0. The sizes of the colloidal particles greatly depended on the comonomer type and pH. The hydrodynamic diameters of the particles ranged from 95nm to 265nm and their polydispersity index (PDI) values were less than 0.1. The particles containing comonomer moieties had spherical morphology and good stabilities. P(S/DMA) particles, especially showed excellent colloidal stability and had positive zeta potential values at the acidic pH range as a result of protonation of tertiary amine group of the DMA moiety. In addition, DMA functionalized PS colloids enabled to easy way for the preparation of PS/SiO _2 composites. By physically deposition of silica nanoparticles onto the P(S/DMA) at acidic medium, PS/SiO _2 core/shell composite particles were obtained. Both preparations of PS colloids and PS/SiO _2 composites were easy and one-pot syntheses.
机译：缺乏对亲水性共聚单体和pH对官能化聚苯乙烯胶体粒径的影响的研究。在这项研究中，聚苯乙烯（PS）胶体是通过将苯乙烯（S）与2-（二甲氨基）乙基甲基丙烯酸酯（DMA）和甲基丙烯酸甲酯（MMA）在pH 3.0和7.0下进行无乳化剂乳液共聚而制备的。胶体颗粒的大小很大程度上取决于共聚单体的类型和pH。颗粒的流体力学直径为95nm至265nm，其多分散指数（PDI）值小于0.1。含有共聚单体部分的颗粒具有球形形态和良好的稳定性。 P（S / DMA）颗粒尤其表现出优异的胶体稳定性，并且由于DMA部分的叔胺基质子化，在酸性pH范围内具有正的Zeta电位值。此外，DMA官能化的PS胶体为制备PS / SiO _2复合材料提供了简便的方法。通过在酸性介质上将二氧化硅纳米粒子物理沉积到P（S / DMA）上，获得PS / SiO _2核/壳复合粒子。 PS胶体和PS / SiO _2复合材料的制备都很容易，可以一锅合成。

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