Acta Phys. -Chim. Sin. ›› 2009, Vol. 25 ›› Issue (06): 1207-1212.doi: 10.3866/PKU.WHXB20090632

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Preparation of P-mSA/mCS Bipolar Membrane and Its Application in Separating Monovalent and Divalent Ions

XIAO Yan-Chun, CHEN Ri-Yao, ZHENG Xi, CHEN Xiao, CHEN Zhen   

  1. College of Chemistry and Materials Science, Fujian Normal University, Fuzhou 350007, P. R. China
  • Received:2008-12-22 Revised:2009-03-19 Published:2009-06-05
  • Contact: CHEN Zhen


A phosphorylated sodium alginate (P-SA) membrane was synthesized using phosphorus pentaoxide, riethyl phosphate and phosphoric acid and then modified by ferrocene. Chitosan (CS) was modified by acetylferrocene. A P-ferrocene-SA/acetylferrocene-CS bipolar membrane, P-mSA/mCS BPM, was prepared by a paste method. The bipolar membrane was characterized by Fourier transform infrared spectroscopy (FTIR), contact angle, charge density, ion exchange capacity and alternating current impedance spectroscopy. Results of FTIR and contact angle measurements showed that the hydrophilic property of SA improved after modification by phosphorylation. P-mSA/mCS BPMwas applied to separate monovalent and divalent ions. The rejection ratios of divalent and monovalent ions were about 95%and 22%, respectively, when the pressure was 0.3 MPa.

Key words: Bipolar membrane, Phosphorylation, Ferrocene, Separation of monovalent and divalent ions


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