Applied Chemistry for Engineering, Vol.29, No.1, 67-76, February, 2018
PDMS-HNT과 PDMS-mHNT 복합막을 통한 CO2와 N2의 기체투과
Gas Permeation of CO2 and N2 through PDMS-HNT and PDMS-mHNT Composite Membranes
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초록
본 연구에서는 PDMS에 halloysite nanotube (HNT)와 modified HNT (mHNT)를 첨가하여 PDMS-HNT 복합막과 PDMS-mHNT 복합막을 제조하였다. 그리고 물리 화학적 특성을 조사하기 위하여 FT-IR, XRD, TGA, SEM을 사용하였고, N2와 CO2 기체에 대한 투과도와 선택도 성질을 고찰하였다. 특히, 35 ℃에서 PDMS-HNT 10 wt% 복합막과 PDMS-mHNT 5 wt% 복합막은 가장 높은 CO2/N2 선택도와 CO2 투과도를 보였다. 전체적으로 PDMS-HNT 복합막과 PDMS-mHNT 복합막은 PDMS 막보다 CO2/N2 선택도가 증가하였다.
In this study, PDMS-HNT and PDMS-mHNT composite membranes were prepared by the addition of halloysite nanotube (HNT) and modified HNT (mHNT) to PDMS. To investigate the physico-chemical characteristics of composite membranes, analytical methods such as FT-IR, XRD, TGA, and SEM were utilized. The gas permeability and selectivity properties of N2 and CO2 were evaluated. In particular, the PDMS-HNT with 10 wt% HNT and PDMS-mHNT with 5 wt% mHNT showed the highest CO2/N2 selectivity and CO2 permeability at 35 ℃, respectively. Overall, PDMS-HNT and PDMS-mHNT composite membranes improved the CO2/N2 selectivity compared to that of using PDMS membrane.
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