物理化学学报 >> 2009, Vol. 25 >> Issue (12): 2438-2444.doi: 10.3866/PKU.WHXB20091110

研究论文 上一篇    下一篇

CoPc(COOH)8-SA/mCS双极膜的制备及表征

陈日耀, 陈震, 郑曦, 陈晓, 黄彩霞   

  1. 福建师范大学化学与材料学院, 福州 350007; 宁德师范高等专科学校化学系, 福建 宁德 352100
  • 收稿日期:2009-06-09 修回日期:2009-07-17 发布日期:2009-11-27
  • 通讯作者: 陈震 E-mail:zc1224@pub1.fz.fj.cn

Preparation and Characterization of CoPc(COOH)8-SA/mCS Bipolar Membranes

CHEN Ri-Yao, CHEN Zhen, ZHENG Xi, CHEN Xiao, HUANG Cai-Xia   

  1. College of Chemistry and Materials Science, Fujian Normal University, Fuzhou 350007, P. R. China; Chemistry Department, Fujian Ningde Teachers College, Ningde 352100, Fujian Province, P. R. China
  • Received:2009-06-09 Revised:2009-07-17 Published:2009-11-27
  • Contact: CHEN Zhen E-mail:zc1224@pub1.fz.fj.cn

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摘要：

分别用Fe3+离子和戊二醛作为交联剂对海藻酸钠(SA)阳膜层和壳聚糖(CS)阴膜层进行改性, 制备了八羧基钴酞菁-海藻酸钠/改性壳聚糖(CoPc(COOH)8-SA/mCS)双极膜(BPM). 在海藻酸钠阳膜层中添加八羧基钴酞菁以提高阳膜的离子交换容量, 促进中间层水的解离. 用傅立叶红外(FT-IR)光谱、扫描电镜(SEM)等方法对制备的双极膜进行了表征. 实验结果表明, 经八羧基钴酞菁改性后, 阳离子交换膜层的离子交换容量、H+离子透过率均获得提高. 与Fe3+离子改性或二茂铁离子改性的mSA/mCS双极膜相比, CoPc(COOH)8-SA/mCS双极膜的交流阻抗、电阻压降(IR降)和溶胀度降低. 当电流密度高达105 mA·cm-2时, CoPc(COOH)8-SA/mCS双极膜的IR降仅为0.7 V.

关键词: 双极膜, 八羧基钴酞菁, 海藻酸钠, 壳聚糖, 中间界面层, 水解离

Abstract:

A sodiumalginate (SA) cation layer was modified by cobalt octocarboxyphthalocyanine (CoPc(COOH)8) to improve its ion exchange capacity and to promote water splitting at the interlayer. The CoPc(COOH)8-SAand chitosan (CS) were then modified using Fe3+ and glutaraldehyde as linking reagents to prepare CoPc(COOH)8-SA/mCS bipolar membranes (BPMs). FT-IR spectra and SEM were used to characterize CoPc(COOH)8-SA/mCS BPMs. Experimental results showed that the ion exchange capacity and hydrogen ion transmigration rate of the CoPc(COOH)8-SA cation exchange membrane had increased. By comparison to the mSA/mCS BPMthat was modified by Fe3+ or ferrocene, the AC impedance, IR drop and the swelling degree of the CoPc(COOH)8-SA/mCS BPMs all decreased. The IR drop of the CoPc(COOH)8-SA/mCS BPMwas only 0.7 Vat a higher current density of 105 mA·cm-2.

Key words: Bipolar membrane, Cobalt octocarboxyphthalocyanine, Sodiumalginate, Chitosan, Interlayer, Water splitting

MSC2000: 

  • O646