聚醯亞胺薄膜於氣體分離之應用

Gas Separation Performances of Polyimide Membranes

周上智(S.C. Chou) ； 陳俊宏(J.H. Chen)

《紡織綜合研究期刊》 31卷2期 (2021/04) Pp. 1-7

https://doi.org/10.6439/TTRJ.202104_31(2).0001

摘要

氣體分離廣泛的應用在氣體純化、醫療保健與碳捕捉等領域，是薄膜分離的一種新應用。其中，聚醯亞胺（PI）具有極優異的氣體分離特性，可用於各種氣體（氫與氮、氧與氮、二氧化碳與氮及氧）的分離。PI薄膜應用上具有高氣體分離選擇性及熱穩定性，在高溫及低溫狀態下都有非常安全與穩定的分離特性。本研究分三個部分探討，首先合成不同化學結構之PI，比對市售PI，以探討不同化學結構對氣體分離物性之影響。第二部分以含氨基二氧化矽（AMS）與PI ODPA-TFMB製成複合薄膜（MMM），在AMS添加20%比例下二氧化碳通量及選擇性為210.1 barrer/30.8，未添加為66.7 barrer/27.8。最後在碳膜研究上，PI ODPA-FDA具有最佳的熱穩定性，最適合碳膜的高溫製程，對比市售PI（Matrimid），ODPA-FDA具有更優異的氣體分離特性，二氧化碳通量及選擇性達5379 barrer/29.4。

關鍵字

聚醯亞胺 ； 薄膜 ； 氣體分離

並列摘要

Polyimide, PI membranes are excellent for gas separation due to its high gas separation performance. In this research, first we compared to a commercial polyimide Matrimid with two PI membrane was successfully developed by Taiwan Textile Research Institute (TTRI). Second, amorphous amino-modified silica nanoparticles (AMS) were successfully synthesized via the sol-gel method and combined with the PI, ODPA-TFMB to prepare mixed matrix membranes (MMMs) for gas separation. The CO_2 permeation properties and CO_2/N_2 selectivity of the MMM with 20 wt% AMS were 210.1 barrer and 30.8, respectively, while those of the control membrane were 66.7 barrer and 27.8, respectively. At the last, the carbonized membranes were characterized by determining its pore size distribution and sorption isotherms. Results showed that PI, ODPA-FDA has a better gas separation performance than commercial Matrimid. The CO_2 permeation properties and CO_2/N_2 selectivity of ODPA-FDA were 5379 barrer and 29.4, respectively.

並列關鍵字

Polyimide ； membrane ； gas separation