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http://dx.doi.org/10.9713/kcer.2011.49.2.181

Spectroscopic Analysis of Silica Nanoparticles Modified with Silane Coupling Agent  

Song, Seong-Kyu (Department of Chemical Engineering, Keimyung University)
Kim, Jung-Hye (Department of Chemical Engineering, Keimyung University)
Hwang, Ki-Seob (Department of Chemical Engineering, Keimyung University)
Ha, Ki-Ryong (Department of Chemical Engineering, Keimyung University)
Publication Information
Korean Chemical Engineering Research / v.49, no.2, 2011 , pp. 181-186 More about this Journal
Abstract
In this study, we used 3-(trimethoxysilyl)propylmethacrylate(MPS) silane coupling agent for surface modification of silica nanoparticles. We studied effects of reaction conditions such as solvent pH, MPS hydrolysis time, reaction time, and molar ratio of MPS to Si-OH groups on silica nanoparticle surfaces, on the surface modification reactions of silica nanoparticles. Fourier Transform Infrared Spectroscopy(FTIR), Elemental Analysis(EA) and solid state crosspolarization magic angle spinning(CP/MAS) Nuclear Magnetic Resonance Spectroscopy(NMR) techniques were used to determine the type and the degree of surface modification. We found MPS reacts preferentially with Si-OH groups of the silica nanoparticles as monomeric form at solvent pH = 4.5. But increasing hydrolysis time of MPS from 30 mins to 90 mins, and molar ratio of MPS to Si-OH groups on silica nanoparticle surfaces, we found that MPS reacts preferentially with Si-OH groups of the silica nanoparticles as oligomeric form.
Keywords
Silica; Silane Coupling Agent; FTIR; NMR;
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Times Cited By KSCI : 4  (Citation Analysis)
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