氧化鋁/聚甲基丙烯酸甲酯複合材料之製備及其特性分析

Synthesis and Characterizations of Al2O3 /PMMA Hybrid Materials

林宏道

指導教授 ： 曾俊元

國立臺北科技大學/工程學院/材料科學與工程研究所/碩士(2009年)

摘要

本論文是將氧化鋁粉表面批覆一層聚甲基丙烯酸甲酯(PMMA)高分子形成複合材料，因氧化鋁粉不能直接和此單體形成化學鍵結，為了提高有機高分子與無機物間之相容性而增強其鍵結，本實驗採用偶合劑3-甲基丙烯醯氧基丙基三甲氧基矽烷(γ-MPS)做為整個反應中連結有機高分子及氧化鋁粉無機物間的橋樑。
有機-無機混成材料是在鹼性環境下來製備，首先氧化鋁粉與偶合劑3-甲基丙烯醯氧基丙基三甲氧基矽烷(γ-MPS)在乙醇所組成的反應液中進行縮和反應，讓氧化鋁粉與偶合劑3-甲基丙烯醯氧基丙基三甲氧基矽烷(γ-MPS)能夠產生鍵結。然後將此批覆好耦合劑的氧化鋁粉中加入起始劑，在氧化鋁粉表面產生自由基，最後再加入甲基丙烯酸甲酯單體(MMA)，使聚合物順利接枝到氧化鋁粉表面。
以穿透式電子顯微鏡(TEM)來觀察所製備的複合顆粒之組合結構，顯示出所發展的製程能在氧化鋁粉表面均勻覆蓋一層很薄的高分子；使用熱重分析儀(TGA)來得知燒失的量，可印證其與我們所添加進去的高分子量很相近；藉紅外光譜儀(FTIR)的表面分析得知在C=O雙鍵的特徵峰它有化學位移的現象；由恆電位儀(Zeta Potential) 的表面電荷分析得知未披覆高分子的氧化鋁和已披覆高分子的氧化鋁之間零電位差異；而使用三點抗彎測試做成形體強度測試，顯示出採披覆高分子的氧化鋁之試片比未披覆高分子的氧化鋁之試片有較高彎曲強度，經由上述測試的結果，可判斷氧化鋁粉表面確實有聚甲基丙烯酸甲酯(PMMA)高分子薄膜的形成，而且此披覆高分子的氧化鋁粉可形成強度高之成形體，是優良的牙齒材料。

關鍵字

複合材料 ； 氧化鋁/聚甲基丙烯酸甲酯 ； 殼核結構

並列摘要

The thesis reports that a technology has been developed to coating Al2O3 powders with PMMA polymer to form ceramic-polymer composite for denture application γ-MPS was used as coupling agent to form and strengthen a chemical bond between PMMA polymer(organic) and Al2O3 powders(inorganic).
To create an alkaline condition, ethyl alcohol was first added; then, γ-MPS reacted with Al2O3 to form a bond. after the condensation reaction, 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 of PMMA polymer coated on Al2O3 powders was observed under the Transmission Electron Microscopy(TEM).The test specimens formed by the polymer coated Al2O3 powders had higher strength after being tested by three-point bending test. In addition, the lost quantity of polymers was almost the same as what we had added in (γ-MPS and PMMA) via the TGA.by the analysis of the FTIR.the C=O peak showed that the surface of coated Al2O3 had a chemical shift, and its surface potential was different from the uncoated one under the measurement of Zeta Potential meter. 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 ； Al2O3/PMMA ； core-shell structure

參考文獻

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