Synthesis and characterization of PMMA/Al2O3 composite particles by in situ emulsion polymerization--颗粒学报PARTICUOLOGY

Liu, H., Ye, H., Lin, T., & Zhou, T. (2008). Synthesis and characterization of PMMA/Al2O3 composite particles by in situ emulsion polymerization. Particuology, 6(3), 207–213. https://doi.org/10.1016/j.partic.2008.01.003

Synthesis and characterization of PMMA/Al₂O₃ composite particles by in situ emulsion polymerization

Hui Liu^*, Hongqi Ye, Tianquan Lin, Tao Zhou

College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China

10.1016/j.partic.2008.01.003

Volume 6, Issue 3, June 2008, Pages 207-213

Received 5 December 2007, Accepted 10 January 2008, Available online 14 May 2008.

E-mail: liuhui@mail.csu.edu.cn

Highlights

Abstract

In order to improve its dispersibility, superfine alumina (Al₂O₃) was encapsulated with poly(methyl methacrylate) (PMMA) by in situ emulsion polymerization. It was found that only when the concentration of sodium dodecyl sulfate (SDS) was much higher than its critical micelle concentration, could PMMA/Al₂O₃ composite particles with high percentage of grafting (PG) be prepared. The same results were obtained between the experimental and stoichiometric amounts of tris(dodecylbenzenesulfonate) isopropoxide (NDZ), indicating that single-molecule-layer adsorption had taken place between NDZ and Al₂O₃. Analysis using FTIR, TEM and XPS showed that PMMA/Al₂O₃ composite particles with core–shell structure had been successfully synthesized by in situ emulsion polymerization. Compared to Al₂O₃, thermal stability and dispersibility of the composite particles showed marked improvement.

Graphical abstract

Keywords

PMMA; Alumina; Composite particle; Encapsulation; Dispersibility

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