New Synthetic Route to (3-Glycidoxypropyl)trimethoxysilane-Based Hybrid Organic-Inorganic Materials

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• 作者：Plinio Innocenzi ; Giovanna Brusatin ; Massimo Guglielmi ; and Roberta Bertani
• 刊名：Chemistry of Materials
• 出版年：1999
• 出版时间：July 1999
• 年：1999
• 卷：11
• 期：7
• 页码：1672 - 1679
• 全文大小：111K
• 年卷期：v.11,no.7(July 1999)
• ISSN：1520-5002

文摘

Hybrid organic-inorganic materials have been obtained by cohydrolysis of (3-glycidoxypropyl)trimethoxysilane (GPTMS) and tetraethyl orthosilicate (TEOS) in acidic conditions.Boron trifluoride diethyl etherate (BF₃OEt₂) has been used to catalyze the epoxidepolymerization. The effect of BF₃OEt₂ has been studied by multinuclear magnetic resonance(NMR) in the precursor sol and by Fourier transform infrared spectroscopy in the finalmaterial. The addition of BF₃OEt₂ to a prereacted sol of GPTMS and TEOS has allowed theepoxide ring opening at room temperature, without formation of diol units or boric acidprecipitation in the final material. The prereaction time of GPTMS with TEOS has beenfound to be an important parameter. The catalytic effect of BF₃OEt₂ with respect to othercommonly used catalysts in sol-gel processing of GPTMS-based hybrid organic-inorganicmaterials, such as zirconium butoxide and 1-methylimidazole, has been studied.