藉由乙醯丙酮控制進行水性壓克力乳膠/二氧化矽奈米複合材料與次微米複合材料之比較性研究

Comparative studies on the Preparation Preparation and Physical Properties of Environmentally Friendly PMMA-silica Nano/Sub-micron Scaled Composite Latexs Controlled by Chelating Agent

徐聖傑(Sheng-Chieh Hsu)

指導教授 ： 葉瑞銘

中原大學/理學院/化學研究所/碩士(2010年)

https://doi.org/10.6840/cycu201000646

摘要

本研究主要探討以螯合劑控制，製備乙烯基表面改質之二氧化矽次微米粒子與奈米粒子；再將製備好的乙烯基改質二氧化矽次微米粒子及奈米粒子分別與MMA單體混合再以乳化聚合(Emulsion polymerization) 方式製備水性壓克力乳膠/二氧化矽次微米米複合材料及水性壓克力乳膠/二氧化矽奈米複合材料。
研究中，將探討奈米複合材料與次微米複合材料在防腐蝕性質、機械性質及氣體阻隔性質之變化。首先利用掃描式電子顯微鏡 (SEM) 、固態核磁共振 (SSNMR) 鑑定乙烯基改質二氧化矽次微米粒子與乙烯基改質二氧化矽奈米粒子已被成功製備。再者利用傅利葉轉換紅外線光譜儀 (FT-IR) 觀察壓克力次微米複合材料與壓克力奈米複合材料以成功製備；使用循環伏特電位儀 (CV) 與鹽霧試驗法量測防腐蝕性質之相關數據；以動態機械分析儀 (DMA) 量測奈米複合材料之機械性質；利用氣體透過率分析 (GPA) 與水氣透過率分析 (VPA) 探討材料之阻隔性質，然而各項性質皆以奈米複合材料較為優異。

關鍵字

二氧化矽 ； 壓克力乳膠 ； 乳化聚合

並列摘要

In this paper, comparative studies on the preparation and physical properties of as-prepared PMMA/nano-silica composite (PNS) and PMMA/Submicro-silica composite (PMS) materials were successfully presented. Vinyl-modified silica nanoparticles and sub-microparticles were first prepared by sol-gel route with/without chelating agent of acetyl acetone (AcAc). Specific feeding amount of silica particles was subsequently reacted with MMA monomers by emulsion polymerization to yield series of PMS and corresponding PNS materials, respectively.
Systematically comparative studies on the physical properties of both as-prepared composite materials indicated precisely that PNS showed effectively enhanced anticorrosion, mechanical properties as compared to that of corresponding PMS based on a series of instrumentation evaluations performed by electrochemical cyclic voltammetric (CV), Salt Spray Test, dynamic mechanical analysis (DMA), Gas Permeability Analyzer (GPA), Vapor Permeability Analyzer (VPA) and UV-visible transmission spectroscopy, respectively.

並列關鍵字

PMMA ； Emulsion polymerization ； Silica particles

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