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Enhancement of Salt Rejection and Water Flux by Crosslinking-Induced Microstructure Change of N-substituted Polybenzimidazole Membranes

Published online by Cambridge University Press:  16 September 2015

Motohiro Aiba ,
Takahiro Tokuyama ,
Hidetoshi Matsumoto ,
Hiroki Tomioka ,
Tomoya Higashihara  and
Mitsuru Ueda
Motohiro Aiba
Affiliation:
Department of Organic and Polymeric Materials, Graduate School of Science and Engineering, Tokyo Institute of Technology, 2-12-1, O-okayama, Meguro-ku, Tokyo 152-8552, Japan.
Takahiro Tokuyama
Affiliation:
Toray Industries Inc., Sonoyama, Otsu, Shiga 520-0842, Japan.
Hidetoshi Matsumoto
Affiliation:
Department of Organic and Polymeric Materials, Graduate School of Science and Engineering, Tokyo Institute of Technology, 2-12-1, O-okayama, Meguro-ku, Tokyo 152-8552, Japan.
Hiroki Tomioka
Affiliation:
Toray Industries Inc., Sonoyama, Otsu, Shiga 520-0842, Japan.
Tomoya Higashihara
Affiliation:
Department of Polymer Science and Engineering, Faculty of Engineering, Yamagata University, 4-3-16 Jonan, Yonezawa City, Yamagata 992-8510, Japan.
Mitsuru Ueda
Affiliation:
Department of Polymer Science and Engineering, Faculty of Engineering, Yamagata University, 4-3-16 Jonan, Yonezawa City, Yamagata 992-8510, Japan.
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Abstract

Crosslinked or non-crosslinked ultrathin semipermeable membranes based on the N-butylated and N-butylsulfonated polybenzimidazole (BPBI and BSPBI) were successfully prepared by spin-coating method. Structural characterization by FTIR and WAXD revealed that the N-substitution and the crosslinked structure of PBI suppressed the hydrogen bonding and increased the d-spacing. Furthermore, positron annihilation lifetime spectroscopy (PALS) clearly showed the pore radius change from 0.27-0.29 nm to 0.33 nm by crosslinking. As a result, the enhancement of water flux and NaCl rejection was achieved by the crosslinking of the BPBI and BSPBI. Especially, the crosslinked N-butylsulfonated PBI (CL-BSPBI) membrane significantly improved not only salt rejection but also water flux (NaCl rejection : 46 %, water flux : 22.1 L m-2 h-1) compared to those of non-crosslinked BSPBI one (NaCl rejection : 11 %, water flux : 1.88 L m-2 h-1) due to both the Donnan effect and the formation of larger pores in the membrane, respectively.

Keywords

x-ray diffraction (XRD)polymerthin film
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1745: Symposium FF – Materials as Tools for Sustainability , 2015 , mrsf14-1745-ff12-05.r1
Copyright
Copyright © Materials Research Society 2015 

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References

REFERENCES

Geise, G. M., Lee, H., Miller, D. J., Freeman, B. D., McGrath, J. E., Paul, D. R., J. Polym. Sci. Part B Polym. Phys. 48, 1685–1718 (2010).CrossRefGoogle Scholar
Petersen, R. J., J. Membr. Sci. 83, 81–150 (1993).CrossRefGoogle Scholar
Wang, K. Y., Xiao, Y., Chung, T. S., Chem. Eng. Sci. 61, 5807–5817 (2006).CrossRefGoogle Scholar
Aiba, M., Tokuyama, T., Matsumoto, H., Tomioka, H., Higashihara, T., Ueda, M., J. Appl. Polym. Sci. 2015, impress.Google Scholar
Ayala, D., Lozano, A. E., de Abajo, J., Garcia-Perez, C., de la Campa, J. G., Peinemann, K. V., Freeman, B. D., Prabhakar, R., J. Membr. Sci. 215, 61–73 (2003).CrossRefGoogle Scholar
Kobayashi, Y., Mohamed, H. F. M., Ohira, A., J. Phys. Chem. 113, 5698–5701 (2009).CrossRefGoogle Scholar
Geise, G. M., Paul, D. R., Freeman, B. D., Prog. Polym. Sci. 39, 1–42 (2014).CrossRefGoogle Scholar
Setiawan, L., Wang, R., Li, K., Fane, A. G., J. Membr. Sci. 369, 196–205 (2011).CrossRefGoogle Scholar