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Preparation of a Facilitated Transport Membrane Composed of Carboxymethyl Chitosan and Polyethylenimine for CO2/N2 Separation
College of Chemical Engineering and Materials Science, Zhejiang University of Technology, Hangzhou 310014, China
Laboratory for Applied Physical Chemistry and Environmental Technology, Department of Chemical Engineering, K.U.Leuven, W. de Croylaan 46, Leuven B-3001, Belgium
* Author to whom correspondence should be addressed.
Received: 12 November 2012; in revised form: 22 December 2012 / Accepted: 4 January 2013 / Published: 7 February 2013
Abstract: The miscibility of carboxymethyl chitosan/polyethylenimine (CMCS/PEI) blends was analyzed by FT-IR, TGA and SEM. Defect-free CMCS/PEI blend membranes were prepared with polysulfone (PSf) ultrafiltration membranes as support layer for the separation of CO2/N2 mixtures. The results demonstrate that the CMCS/PEI blend is miscible, due to the hydrogen bonding interaction between the two targeted polymers. For the blended membrane without water, the permeability of CO2 gas is 3.6 × 10−7 cm3 cm−2 s−1 cmHg−1 and the corresponding separation factor for CO2 and N2 gas is about 33 at the pressure of 15.2 cmHg. Meanwhile, the blended membrane with water has the better permselectivity. The blended membrane containing water with PEI content of 30 wt% has the permeance of 6.3 × 10−4 cm3 cm−2 s−1 cmHg−1 for CO2 gas and a separation factor of 325 for CO2/N2 mixtures at the same feed pressure. This indicates that the CO2 separation performance of the CMCS/PEI blend membrane is higher than that of other facilitated transport membranes reported for CO2/N2 mixture separation.
Keywords: facilitated transport; blend membrane; carboxymethyl chitosan; polyethylenimine; carbon dioxide
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MDPI and ACS Style
Shen, J.-N.; Yu, C.-C.; Zeng, G.-N.; van der Bruggen, B. Preparation of a Facilitated Transport Membrane Composed of Carboxymethyl Chitosan and Polyethylenimine for CO2/N2 Separation. Int. J. Mol. Sci. 2013, 14, 3621-3638.
Shen J-N, Yu C-C, Zeng G-N, van der Bruggen B. Preparation of a Facilitated Transport Membrane Composed of Carboxymethyl Chitosan and Polyethylenimine for CO2/N2 Separation. International Journal of Molecular Sciences. 2013; 14(2):3621-3638.
Shen, Jiang-Nan; Yu, Chang-Chao; Zeng, Gan-Ning; van der Bruggen, Bart. 2013. "Preparation of a Facilitated Transport Membrane Composed of Carboxymethyl Chitosan and Polyethylenimine for CO2/N2 Separation." Int. J. Mol. Sci. 14, no. 2: 3621-3638.