Acta Phys. -Chim. Sin. ›› 2013, Vol. 29 ›› Issue (12): 2573-2578.doi: 10.3866/PKU.WHXB201310214

• ELECTROCHEMISTRY AND NEW ENERGY • Previous Articles     Next Articles

Preparation and Physicochemical Property of Self-Crosslinked Poly(phthalazinone ether ketone) Anion-Exchange Membranes

LIU De-Zhi, HOU Xi-Xin, ZHU Xiu-Ling, WANG Rui, JING Jian, CUI Yue   

  1. School of Chemical Engineering, Faculty of Environmental and Biological Science and Technology, Dalian University of Technology, Dalian 116024, Liaoning Province, P. R. China
  • Received:2013-08-22 Revised:2013-10-14 Published:2013-11-28
  • Contact: ZHU Xiu-Ling E-mail:zhuxl@dlut.edu.cn

Abstract:

Self-crosslinked poly(phthalazinone ether ketone) anion-exchange membranes (AEMs) were successfully fabricated from chloromethylated poly(phthalazinone ether ketone) (CMPPEK) by amination, membrane casting, and OH-exchange reaction steps. Triethylamine (TEA) was used as an ammonium agent, and diethylenetriamine (DETA) and diethylamine (DEA) were used as self-crosslinking agents in the quaternary reaction of CMPPEK, resulting in DETA-QPPEK-OH and DEA-QPPEK-OH AEMs, respectively. The chemical structures of DETA-QPPEK-OH and DEA-QPPEK-OH were characterized using Fourier transform infrared (FTIR) spectroscopy. The physicochemical properties of these AEMs were investigated including ion-exchange capacity (IEC), swelling ratios, water uptake, and ionic conductivities at 30 ℃. The results showed that the swelling ratio of the DETA-crosslinked AEM was lower than that of the DEAcrosslinked AEM. This could be attributed to multi-crosslinking of multi-amino groups in the DETA structure. The temperature dependences of the ionic conductivities of the AEMs were measured from 30 to 80 ℃. The ionic conductivities of the DEA-crosslinked and DETA-crosslinked AEMs were 0.060 and 0.028 S·cm-1 at 80 ℃, respectively. The thermal stabilities of the resulting DETA-QPPEK-OH and DEAQPPEK-OH membranes were investigated using thermogravimetric analysis (TGA), under a nitrogen atmosphere. The obtained membranes have high dimensional stabilities and are very promising for potential applications in anion-exchange membrane fuel cells (AEMFCs).

Key words: Anion exchange membrane, Alkaline fuel cell, Poly(phthalazinone ether ketone), Diethylenetriamine, Self-crosslinking, Conductivity

MSC2000: 

  • O646