| 中文摘要 |
本研究主要目的是利用溶膠—凝膠法製備具有耐熱性、透光性與抗腐蝕等功能性之DPGDA／SR-444／VTES／Bi_2O_3有機／無機奈米複合材料。首先將VTES矽氧烷偶合劑透過pH值：2～3酸性水溶液形成矽醇中間物，以利Bi_2O_3無機金屬氧化物進行親有機化改質反應，以便無機金屬氧化物能順利的以化學共價鍵結至有機基材上，藉此提高有機基材之透光性、耐熱性、耐燃性及硬度等特性，接著將此VTES／Bi_2O_3複合物利用剩餘的活性Si-OH或Bi-OH官能基與SR-444有機壓克力單體上的活性羥基行縮合脫水反應，合成出SR-444／VTES／Bi_2O_3複合物，最後添加TAIC架橋劑及DPGDA共聚體單體與SR-444／VTES／Bi_2O_3複合物行自由基光共聚合反應，使合成的複合物上聚合鏈存在理想網狀化學共價鍵結結構，以提升複合材料的耐熱性及機械性質，合成理想高科技產業使用之奈米複合材料。合成時，透過FT-IR光譜儀來確定複合材料的最佳的組成配方比與反應條件；並利用TGA耐熱性測試、UV-Vis透光性測試、附著力及塊材硬度等，對其熱性質、透明性及機械物性等性質進行分析。
The main of this research is to develop DPGDA/SR-444/VTES/Bi_2O_3 nanocomposite materials with thermal resistance, transpareny and corrosion resistance by sol-gel reaction processes. The VTES coupling agent was transformed the silanol intermediates by hydrolysis in pH: 2~3 acid solution. These silanol intermediates could be coupled with powder Bi_2O_3 and cross linked to organic matrices. Afterwards, the active Si-OH or Bi-OH functional groups remained on the VTES/Bi_2O_3 complexes that could be covalently bonding with SR-444 acrylate monomer. In order to improve the thermal resistance and mechanical properties, TAIC curing agent, DPGDA monomer, and the SR-444/VTES/Bi_2O_3 complexes were covalently bonded by free radical polymerization to achieve cross linked structure of organic/inorganic nanocomposite. The bonded formation and the best weight formula of reactant were identified by FT-IR spectra. The thermal resistance properties, transparence and hardness of these nanocomposites were measured by TGA, UV-Vis, and hardness tester respectively. |
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