Modification of silica with PMMA via ultrasonic irradiation and its application for reinforcement of polyacrylates--颗粒学报PARTICUOLOGY

Qiu, S., Yang, L., Zhang, Y., & Xu, Y. (2013). Modification of silica with PMMA via ultrasonic irradiation and its application for reinforcement of polyacrylates. Particuology, 11(6), 782–785. https://doi.org/10.1016/j.partic.2012.09.011

Modification of silica with PMMA via ultrasonic irradiation and its application for reinforcement of polyacrylates

Shouji Qiu^*, Lei Yang, Ya Zhang, Yongshen Xu

School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China

10.1016/j.partic.2012.09.011

Volume 11, Issue 6, December 2013, Pages 782-785

Received 9 July 2012, Revised 3 September 2012, Accepted 19 September 2012, Available online 24 April 2013.

E-mail: qshouji@yahoo.com.cn

Highlights

• PMMA modified silica nanoparticles were prepared with the aid of ultrasonication.

• Core–shell nanoparticles with average size of 36 nm and PMMA layer of 8 nm were obtained.

• The modified silica particles can be well dispersed in polyacrylate matrices.

Abstract

Polymethyl methacrylate (PMMA) encapsulated silica nanocomposite particles were prepared by ultrasonically induced in situ polymerization of methyl methacrylate (MMA) on the surface of silica sol. The nanoparticles were characterized by Fourier transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM), thermogravimetry (TG), scanning electron microscopy (SEM). The results showed that core–shell structure nanocomposite particles with an average size of 36 nm were obtained, and the thickness of polymer encapsulating layer was about 8 nm. The pretreatment of silica sol with tert-butyl hydroperoxide (TBHP) and the addition of γ-methacryloxypropyl trimethoxysilane (MAPTS) significantly enhanced the encapsulation effect. Modified by the polymer layer, the silica particles could be well dispersed in matrices and utilized to improve the mechanical performance of polyacrylates.

Graphical abstract

Keywords

Encapsulation; UltrasonicIn situ polymerization; Silica; Nanocomposites; Nanoparticles

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