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Preparation of poly(methyl methacrylate)-Silica nanoparticles via differential microemulsion polymerization and physical properties of NR/PMMA-SiO2 hybrid membranes

机译：通过差分微乳液聚合和NR / PMMA-SiO2杂交膜的差分微乳液聚合和物理性质制备聚（甲基丙烯酸甲酯）硅纳米粒子

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摘要

Poly(methy methacrylate) (PMMA)-SiO2 nanoparticles were prepared via differential microemulsion polymerization. The effects of silica loading, surfactant concentration, and initiator concentration on monomer conversion, particle size, particle size distribution, grafting efficiency, and silica encapsulation efficiency were investigated. A high monomer conversion of 99.9% and PMMA-SiO2 nanoparticles with a size range of 30 to 50 nm were obtained at a low surfactant concentration of 5.34 wt% based on monomer. PMMA-SiO2 nanoparticles showed spherical particles with a core-shell morphology by TEM micrographs. A nanocomposite membrane from natural rubber (NR) and PMMA-SiO2 emulsion was studied for mechanical and thermal properties and pervaporation of water-ethanol mixtures. PMMA-SiO2 nanoparticles which were uniformly dispersed in NR matrix, significantly enhanced mechanical properties and showed high water selectivity in permeate flux. Thus, the NR/PMMA-SiO2 hybrid membranes have great potential for pervaporation process in membrane applications. POLYM. ENG. SCI., 2017. (c) 2017 Society of Plastics Engineers
机译：通过差分微乳液聚合制备聚（甲基丙烯酸甲酯）（PMMA）-SiO2纳米颗粒。研究了二氧化硅加载，表面活性剂浓度和引发剂浓度对单体转化，粒度，粒度分布，接枝效率和二氧化硅包封效率的影响。在基于单体的低表面活性剂浓度为5.34wt％的低表面活性剂浓度，获得高99.9％和PMMA-SiO 2纳米颗粒的高分子转化率为30至50nm。 PMMA-SiO2纳米颗粒显示通过TEM显微照片具有核心壳形态的球形颗粒。研究了来自天然橡胶（NR）和PMMA-SiO 2乳液的纳米复合材料，用于机械和热性能和水 - 乙醇混合物的渗透。 PMMA-SiO 2均匀分散在NR基质中的纳米颗粒，显着增强了机械性能，并且在渗透助焊剂中显示出高水选择性。因此，NR / PMMA-SiO 2杂交膜具有巨大的膜应用中的渗透过程的潜力。聚合物。 eng。 SCI。，2017年。（c）2017塑料工程师协会

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