Modification of Cu3(BTC)2 (BTC=benzene-1,3,5-tricarboxylate) and its pervaportion performance as filler in polydimethylsiloxane/polyetherimide (PDMS/PEI) membranes

HUANG FengLing,DINGZhongWei,LIU LiYing

Journal of Beijing University of Chemical Technology ›› 2015, Vol. 42 ›› Issue (6) : 21-25.

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Journal of Beijing University of Chemical Technology ›› 2015, Vol. 42 ›› Issue (6) : 21-25.

Modification of Cu3(BTC)2 (BTC=benzene-1,3,5-tricarboxylate) and its pervaportion performance as filler in polydimethylsiloxane/polyetherimide (PDMS/PEI) membranes

  • HUANG FengLing,DINGZhongWei,LIU LiYing
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Abstract

Cu3(BTC)2 (BTC = benzene-1,3,5-tricarboxylate) crystals have been synthesized by a hydrothermal synthesis method, and then modified by three different silane coupling agents. The materials were used as a filler in polydimethylsiloxane/polyetherimide (PDMS/PEI) membranes．The results showed that the hydrophobicity of the modified materials was enhanced compared to unmodified Cu3(BTC)2．The composite membranes containing modified Cu3(BTC)2 exhibit better separation performance then those containing the unmodified material, with K-Cu3(BTC)2 (modified with γ-aminopropyltriethoxysilane (K-550)) showing the best performance．The CO2 permeation flux of a modified membrane containing K-Cu3(BTC)2 was 0.9038 times the permeance of the umodified membrane and the separation factor for CO2/N2 was 1.2113．A composite membrane with 20% K-Cu3(BTC)2 had a permeation flux 1.1657 times that of a 10% K-Cu3(BTC)2membrane and the separation factor also increased by a factor of 1.0901．

Key words

gas separation / Cu3(BTC)2 / silane coupling agent / modification / polydimethylsiloxane（PDMS）

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HUANG FengLing,DINGZhongWei,LIU LiYing. Modification of Cu3(BTC)2 (BTC=benzene-1,3,5-tricarboxylate) and its pervaportion performance as filler in polydimethylsiloxane/polyetherimide (PDMS/PEI) membranes[J]. Journal of Beijing University of Chemical Technology, 2015, 42(6): 21-25

References

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