聚醯亞胺 / 二氧化矽奈米複合材料之製備與性質研究

Preparation and Properties of Polyimide / Silica Nanocomposite Materials

陳坤玉(Chen Kun-yui)

指導教授 ： 葉瑞銘

中原大學/理學院/化學研究所/碩士(2002年)

https://doi.org/10.6840/cycu200200449

摘要

中文摘要

有機/無機混成複合材料是目前學術界及產業界熱門的研究主題，其特徵主要是利用有機的高分子及無機的陶瓷材料(如層狀黏土或球狀之SiO2)二者之特性相乘而形成所謂的”奈米”複合材料，其中溶膠－凝膠反應為製造此類材料的有效方法，因此，本論文之研究內容即是利用不同比例的Silica無機材質進行溶膠－凝膠反應且有效分散於有機的聚醯亞胺基材中，以形成奈米級有機/無機混成複合材料，並進一步探討所合成之奈米複合材料的化學結構、機械性質、耐熱性質、阻氣與阻水性質。 研究結果，由穿透式電子顯微鏡的照片顯示，無機二氧化矽微粒因在聚醯亞胺基材中添加量的不同，粒徑大小可達200〜600 nm的分佈狀況。奈米複合材料製備過程所產生的結構變化亦可由紅外光譜進行變溫反應，以觀察其官能基的動態變異性。當Silica的添加比例增加時，奈米複合材料的機械強度與耐熱性均有明顯的提升，且阻水阻氣性能也相對地增加。

關鍵字

二氧化矽 ； 聚醯亞胺 ； 奈米複合材料

並列摘要

Abstract

Organic/Inorganic Hybrid (OIH) materials are the materials that combining the characteristics derived from multiple speciality of the organic and inorganic moieties. One effective way to produce OIH materials is so called the “Sol-Gel” reaction. The major content of this essay is to prepare a series of polyimide/silica (PI/ SiO2) nanocomposites, which consisted of inorganic silica component dispersing uniformly in organic polyimide matrix by the “Sol-Gel” process. The characterization of the as-prepared PI/SiO2 hybrids was investigated by FTIR spectroscopy and TEM. The particle size of inorganic silica in polyimide matrix can be ranged from 200 nm 〜 600 nm based on the different loading of TEOS as the sol-gel precursor. The mechanical strength of the PI/ SiO2 hybrids were investigated by DMA. The thermal stability of the PI/ SiO2 hybrids were studied by TGA and DSC. The gas permeability properties of the PI/ SiO2 hybrids were evaluated by GPA. Water absorption properties of the PI/ SiO2 hybrids were also examined. In summary, we found the incorporation of nanoscale inorganic silica particles uniformly into organic polyimide matrix effectively enhance the mechanical strength, thermal stability, gas barrier properties of bulk polyimide.

並列關鍵字

Polyimide ； nanocomposites ； Silica

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