本研究主要利用滲透蒸發處理技術，使用製備幾丁聚醣薄膜且摻混不同規格的分子篩(3A、4A、5A、NaX和NaY)，並使用硫酸交聯，來進行酒精除水純化實驗，並改變交聯時間，分子篩的含量及進料溫度觀其對滲透量及分離係數的影響。
接著，所製備的薄膜藉由傅立葉紅外線光譜儀、X光繞射儀及掃描式電子顯微鏡鑑定其性質。其熱穩定性及熱裂解溫度則以熱重分析儀分析紀錄。並進行膨潤實驗，比較不同的交聯時間、分子篩含量和規格之間的影響。
經過交聯後的幾丁聚醣薄膜對水膨潤性質，略微上升，但是對乙醇膨潤性質則是大幅下降，這是因為交聯後的幾丁聚醣極性增加的關係。在摻混了分子篩的交聯薄膜，則會呈現對水膨潤性質上升，對酒精則為下降的現象，且下降幅度較摻混前的明顯。滲透量也是隨著摻混量的增加而增加，但分離係數則是要在摻混量達20 wt.%之後，才會有明顯的上升。

The aim of this study is to investigate the dehydration of aqueous ethanol solutions by pervaporation using chitosan membranes which were crosslinked in sulfuric acid and embedded with various types of zeolites(3A, 4A, 5A, NaX and NaY). Effects of crosslinking time, zeolite contents and operation temperature on pervaporation performances were studied.
The membranes were characterized by Fourier transform-infrared spectrometry(FT-IR), X-ray diffractometer(XRD), scanning electronic micro- scopy(SEM). In addition, thermal properties of the membranes embedded with different amout of silica were investigated by thermal gravimetric ananlysis(TGA). Furthermore, effects of crosslinking time, contents and types of zeolite on swelling behaviors in ethanol and in water of chitosan membranes were also investigated.
Compared to the uncrosslinked chitosan membranes, the swelling ratio of the crosslinked chitosan membranes in water increased slight, whereas it declined quite obviously in ethanol. This can be attributed to the enhancement in polarity of the membranes by crosslinking. With addition of zeolites, the swelling ratio in water increased with increasing zeolite contents while it decreases more significantly in ethanol compared to the data of membranes without zeolite embedded. It is found that the total permeability increased with increasing zeolite contents in the EtOH/water pervaporation experiments. On the other hand, the increase in separation factor was observed only when the contents of zeolite were above 20wt.%.

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