Properties of Side Chain Type Sulfonated Polysulfone Proton Exchange Membranes for Fuel Cells

doi:10.11944/j.issn.1000-0518.2019.08.190013

Chinese Journal of Applied Chemistry ›› 2019, Vol. 36 ›› Issue (8): 917-923.DOI: 10.11944/j.issn.1000-0518.2019.08.190013

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Properties of Side Chain Type Sulfonated Polysulfone Proton Exchange Membranes for Fuel Cells

QIAO Zongwen^a^*(),CHEN Tao^b

^aDepartment of Chemical Engineering,Shaanxi Institute of Technology,Xi'an 710300,China
^bDepartment of Chemical Engineering,North University of China,Taiyuan 030051,China

Received:2019-01-14 Accepted:2019-04-17 Published:2019-08-01 Online:2019-07-25
Contact: QIAO Zongwen
Supported by:
Supported by Natural Science Special Project of Shaanxi Education Department(No.18JK0069), Youth Talent Promotion Plan of Xi'an Association for Science and Technology and Science Research Project of Shaanxi Institute of Technology(No.Gfy18-04)

Abstract

Abstract:

Chloromethylated polysulfones(CPS) was used as the precursors, and side chain type sulfonted polysulfone(PS-BDS) was obtained using disodium 1,2-dihydroxybenzene-3,5-disufonate as nucleophilic reagents. The corresponding proton exchange membranes(PEMs) were produced using solution casting method. The relationship between the temperature and properties of PEMs was studied. Since they have characteristic micro-phase separation structures by locating hydrophilic sulfonic acid group far away from hydrophobic main chain of PS, PEMs have excellent dimensional stability at high water sorption ratio. With the increase of temperature, the proton conductivity, the swelling ratio and the water sorption ratio increase. PS-BDS PEMs have comprehensive size stability and methanol permeability. The swelling ratio of PS-BDS-4 PEM is only 22.1% at 25 ℃ and 55.0% at 85 ℃. The methanol permeability is 9.94×10^-7 cm²/s at 25 ℃, lower than those of commercial Nafion115(16.8×10^-7 cm²/s) and Nafion117(23.8×10^-7 cm²/s) PEMs.

Key words: polysulfone, exchange membranesphase separation, dimensional stability

QIAO Zongwen, CHEN Tao. Properties of Side Chain Type Sulfonated Polysulfone Proton Exchange Membranes for Fuel Cells[J]. Chinese Journal of Applied Chemistry, 2019, 36(8): 917-923.

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Properties of Side Chain Type Sulfonated Polysulfone Proton Exchange Membranes for Fuel Cells

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