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http://dx.doi.org/10.14478/ace.2018.1106

Surface Modification of Nano Silica Prepared by Sol-gel Process and Subsequent Application towards Gas-barrier Films  

Jang, Hyo Jun (Department of Polymer Engineering, College of Engineering, Suwon University)
Chang, Mi Jung (Mazal Co., Ltd)
Nam, Kwang Hyun (Mazal Co., Ltd)
Chung, Dae-won (Department of Polymer Engineering, College of Engineering, Suwon University)
Publication Information
Applied Chemistry for Engineering / v.30, no.1, 2019 , pp. 68-73 More about this Journal
Abstract
We prepared hydrophobic silica particles by a sol-gel process from tetraethyl orthosilicate (TEOS), followed by coupling the reaction with octyltrimethoxysilane (OTMS) or hexadecyltrimethoxysilane (HDTMS) under various reaction conditions. We confirmed the extent of silica surface modification with organic compounds by SEM-EDS, thermogravimetry and elemental analysis. The silica particles obtained after the hydrolysis reaction of TEOS in ethanol at $50^{\circ}C$ for 24 h and the coupling reaction with OTMS for 2 h at the same temperature displayed the optimum performance in terms of the dispersity in an organic solvent and the surface roughness of films composited with epoxy resins. The oxygen permeability of the composite film with modified-silica was 12% lower than that of using the film without modified-silica.
Keywords
Silica; Sol-gel; Tetraethyl orthosilicate; Octyltrimethoxysilane; Hexadecyltrimethoxysilane; Gas barrier;
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