球形氧化鋁粒子/高分子複合材料之製備及其特性分析

Synthesis and Characterizations of Spherical Al2O3 Particle/Polymer Composite Materials

劉秉學(Ping -Hsueh Liu)

指導教授 ： 曾俊元

國立臺北科技大學/工程學院/材料及資源工程系研究所/碩士(2010年)

摘要

本研究是將球形氧化鋁粉表面披覆上一層聚甲基丙烯酸甲酯(PMMA)高分子材料，使其形成球形Al2O3/PMMA的複合材料，但氧化鋁粉屬於無機物，PMMA為有機高粉子材料，兩種材料間無法形成化學鍵結，因此為了提高Al2O3/PMMA間的相容性，本實驗加入3-甲基丙烯醯氧基丙基三甲氧基矽烷耦合劑(γ-MPS)當作Al2O3與PMMA間的橋梁。
實驗初步先將球形Al2O3與3-甲基丙烯醯氧基丙基三甲氧基矽烷耦合劑(γ-MPS)於乙醇溶液中進行水解縮合反應，形成球形Al2O3/矽烷耦合劑(γ-MPS)的複合材料。接著將球形Al2O3/矽烷耦合劑(γ-MPS)粉末加入去離子水中，並添加起始劑使氧化鋁粉表面產生自由基，最後將甲基丙烯酸甲酯(MMA)滴入反應溶液中，形成一具有核殼結構的Al2O3/PMMA複合材料。
分析方面首先利用FTIR檢測Al2O3/PMMA粉末表面之化學鍵結；並用恆電位儀(Zeta Potential)分析純Al2O3粉與Al2O3/PMMA粉末的表面電位，觀察兩者間等電位點之差異性；接著以穿透式電子顯微鏡(TEM)觀察Al2O3/PMMA複合粒子的表面組合結構。
上述分析完成後將Al2O3/PMMA粉末與PVA水溶液混合，並利用刮刀成型機鋪層，形成具有一定厚度之塊材，並測試塊材的緻密度與強度，最後利用掃描式電子顯微鏡進行斷面分析。

關鍵字

複合材料 ； 球形氧化鋁/聚甲基丙烯酸甲酯 ； 3-甲基丙烯醯氧基丙基三甲氧基矽烷耦合劑(γ-MPS) ； 甲基丙烯酸甲酯(MMA) ； 核殼結構(Core-Shell)

並列摘要

This study is based on the technology of Al2O3 powders coated with PMMA polymer to form ceramic-polymer composite. Al2O3 powders and MMA cannot form a chemical bonding, therefore, γ-MPS was used as coupling agent to form and strengthen a chemical bond between PMMA polymer(organic) and Al2O3 powders(inorganic).
Organic-inorganic material is prepared in alkaline condition. First, Al2O3 powders and γ-MPS proceeded condensation reaction in the ethanol to form a chemical bonding. Then free radical initiator and MMA were added into above material in sequence, so that the surface of Al2O3 powders was able to be successfully coated with uniform PMMA.
A uniform film was observed under the Transmission Electron Microscopy(TEM) to show that Al2O3 powders can be coated with a thin polymer film. By the analysis of the FTIR, the C=O peak showed that the surface of coated Al2O3 had a chemical shift. Its surface potential was different from the uncoated one under the measurement of Zeta Potential meter. The test specimens formed by the polymer coated Al2O3 powders had higher strength after being tested by three-point bending test. Based on the experimental results through a series of analyses, they show that the composite particles (coated Al2O3) would be a good material for future denture application.

並列關鍵字

Hybrid Materials ； Spherical Al2O3/PMMA ； 3-methacryloxypropyl trimethoxy silane(γ-MPS) ； MMA ； core-shell structure

參考文獻

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