Synthesis and Partial Properties of Naphthalene and Phthalazinone-based Sulfonated Copolyimides for Proton Exchange Membrane in Fuel Cells

Abstract

Abstract: A new sulfonated copolyimides(SPIs) containing both of naphthalene and phthalazinone moieties in polymer's main chain were successfully synthesized from 4,4'-diaminophenyl ether-2,2' disulfonic acid(ODADS), 1,2-dihydro-2-(4-aminophenyl)-4-[4-(4-aminophenoxy)phenyl]-phthalazin-1-one(DHPZ-DA) and 1,4,5,8-naphthalenetetracarboxylic dianhydride(NTDA) via direct polymerization, which are potentially utilized in proton exchange membrane in PEMFC. The obtained sulfonated polymers(SPIs) have a molecular weight with the inherent viscosity range from 0.55 to 1.47 dL/g. The chemical structure of the SPIs was carefully characterized by FTIR and ¹H NMR. The yellow transparent and tough membranes cast from m-cresol solution of SPIs were obtained, which were utilized to investigate the physicochemical properties of new copolymers. The data demonstrate that the membrane's water uptake, swelling ratio, ion exchange capacities(IEC), as well as the resistance to both of water and oxidation varied accordingly with the increase of sulfonation degree of the new SPIs. The introduction of DHPZ-DA improved the SPIs' solubility. Meanwhile, the thermic stability of copolymers by TGA was also investigated.

Key words: Sulfonated polyimides, Proton exchange membrane, Phthalazinone, Fuel cell

CLC Number:

O631

TrendMD:

PAN Hai-Yan, LIANG Yong-Fang, ZHU Xiu-Ling, ZHANG Shou-Hai, JIAN Xi-Gao. Synthesis and Partial Properties of Naphthalene and Phthalazinone-based Sulfonated Copolyimides for Proton Exchange Membrane in Fuel Cells[J]. Chem. J. Chinese Universities, doi: .

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Synthesis and Partial Properties of Naphthalene and Phthalazinone-based Sulfonated Copolyimides for Proton Exchange Membrane in Fuel Cells

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