Journal
MATERIALS RESEARCH BULLETIN
Volume 103, Issue -, Pages 142-149Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.materresbull.2018.02.036
Keywords
Sulfonated poly(arylene ether sulfone); Graphene oxide; Dimensional stability; Proton conductivity
Categories
Funding
- National Science Foundation of China [51602190]
- 111 Project [D16002]
- Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning
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A series composited membranes of sulfonated poly(arylene ether sulfone) and graphene oxide (SPAES-GO-x) have been exploited as proton exchange membrane. The properties of SPAES-GO-x membranes were evaluated including proton conductivity, water uptake, swelling ratio, oxide and thermal stability. Incorporating GO into SPAES matrix restrained the composite membranes swelling and enhanced their proton conductivity. The SPAES-GO-3% membrane showed a conductivity value of 0.183 S cm(-1) at 120 degrees C and relative humidity 100%. Compared with the pristine SPAES membrane, the swelling ratio of SPAES-GO-2% membrane was reduced by 55.7% at 90 degrees C. Small-Angle X-ray Scattering (SAXS) revealed GO promoted SPAES molecular chain movement to form bigger ionic clusters in favor of enhancing proton transport. X-Ray Diffraction and Field Emission Scanning Electron Microscope (XRD and FE-SEM) analysis further demonstrated GO was exfoliated and distributed throughout the SPAES matrix. These results indicated GO was an effective filler to trade off proton conductivity and swelling of composite membrane.
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