Sparsely-distributed silica/PMMA composite particles prepared by static polymerization in aqueous silica dispersion

• Published in: Journal of colloid and interface science Vol. 352; no. 2; pp. 348 - 353
• Main Authors: Kawano, Shintaro, Sei, Asumi, Kunitake, Masashi
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier Inc 15-12-2010; Elsevier
• Subjects: Adsorption; Agglomeration; Chemistry; Colloidal state and disperse state; Dispersions; Emulsions. Microemulsions. Foams; Exact sciences and technology; General and physical chemistry; Organic–inorganic composite materials; Particle Size; Particulate composites; Partitions; Physical and chemical studies. Granulometry. Electrokinetic phenomena; Poly(methyl methacrylate); Polymerization; Polymethyl Methacrylate - chemistry; Polymethyl methacrylates; Silica particles; Silicon dioxide; Silicon Dioxide - chemistry; Static dispersion polymerization; Surface chemistry; Surface physical chemistry; Surface Properties; Water - chemistry; Poly(methyl methacrylate); Silica particles; Organic–inorganic composite materials; Static dispersion polymerization; Partition; Binary compound; Methyl methacrylate polymer; Polymerization; Equilibrium; Silica; Composite material; Submicron particle; Aggregation; Particle; Emulsion; Adsorption; Morphology; Organic-inorganic composite materials; Methyl methacrylate; Aqueous dispersion
• ISSN: 0021-9797; 1095-7103
• DOI: 10.1016/j.jcis.2010.08.061

Sparsely-distributed silica (core)/poly(methyl methacrylate) (PMMA) composite particles were formed by static dispersion polymerization in aqueous dispersion of submicron silica particles.
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► Silica/poly(methyl methacrylate) (PMMA) composite particles, in which silica particles are sparsely distributed in the surface of PMMA particles, were formed by static dispersion polymerization of methyl methacrylate in aqueous dispersions of submicron silica particles. ► The unique silica/PMMA particles were observed only by static polymerization, but not polymerization with even gentle agitation. ► The composited particles were constructed via Pickering emulsion-like silica/PMMA aggregation based on weak interaction between PMMA and silica. ► The morphology of the composite particles is governed by the adsorption/partition equilibrium of PMMA with the silica surface.
Silica/poly(methyl methacrylate) (PMMA) composite particles, in which silica particles are sparsely distributed in the surface of PMMA particles, were formed by static dispersion polymerization of methyl methacrylate (MMA) in aqueous dispersions of submicron silica particles. The silica-modified PMMA particles were constructed via Pickering emulsion-like silica/PMMA aggregation based on weak interaction between PMMA and silica. The morphology of the composite particles is governed by the adsorption/partition equilibrium of PMMA with the silica surface.