本研究的目的是討論以不同的矽烷偶合劑改質二氧化矽與3A zeolite對乙醇除水的滲透蒸發實驗影響。
先利用溶膠－凝膠法(sol-gel method)，以四乙氧基矽烷(Tetraethoxysilane, TEOS)製備二氧化矽(silica)，之後使用 3-aminopropyltriethoxysilane (APTES)和3-mercaptopropyltrimethoxysilane (MPTMS)將二氧化矽與3A zeolite表面改質，另外用MPTMS改質的粒子可利用過氧化氫(H2O2)水溶液將表面的－SH官能基改變為－SO3H。
將不同的改質二氧化矽/3A zeollite混摻入幾丁聚醣內製作成複合膜，利用滲透蒸發實驗探討添加無機物後的複合膜對滲透蒸發效果的影響。改質後的二氧化矽粒子/3A zeolite由傅立葉反射式紅外線光譜(ATR-FTIR)、穿透式電子顯微鏡(TEM)鑑定其性質，複合膜則由傅立葉反射式紅外線光譜及熱重分析儀(TGA)鑑定其複合膜的性質。並進行膨潤實驗，比較改質前後及使用偶合劑種類不同而產生的影響。
改質過的二氧化矽與3A zeolite表面會有一層顏色較淡的物質或表面粗糙化，經過ATR鑑定確定是矽烷偶合劑鍵結在改質過後的粒子表面上。使用矽烷偶合劑改質過後的二氧化矽及3A zeolite，其滲透蒸發效果皆比未改質的二氧化矽或3A zeolite好。

The purpose of this research is to investigate the dehydration of aqueous ethanol solutions by pervaporation using hybrid chitosan membranes embedded with the silica and 3A zeolite particles which were modified by various silanes.
Firstly, the silica particles were obtained by the sol-gel reaction of tetraethyoxylsilane (TEOS). Later, 3-aminopropyltriethoxysilane (APTES) and 3-mercaptopropyltrimethoxysilane (MPTMS) were used to modify the surface of 3A zeolite and the synthesized silica particles. In addition, the MPTMS modified particles were further treated with H2O2 aqueous solution to change the function group －SH to －SO3H of the particle surfaces.
The hybrid membranes were prepared by incorporation the various treated silica/3A zeolite particles into chitosan. Those hybrid membranes were utilized in pervaporation performances. The modified silica/3A zeolite particles were characterized by ATR-FTIR and TEM, and the hybrid chitosan membranes were characterized by ATR-FTIR, TGA. Furthermore, the effects of modified silica/3A zeolite particles by various silanes on swelling behaviors in water and ethanol were also investigated.
It is found that there was a layer of slightly colored materials coated on the surface of the modified silica/3A zeolite particles. Furthermore, surface of the modified particles became rough in some instances. It is evident by ATR-FTIR that a layer of silanic compounds was formed on the surface of treated particles. In addition, the improvement in dehydration performances of aqueous ethanol solutions by using hybrid chitosan membrane incorporated with surface modified silica/3A particles were observed over the unmodified ones.

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