Effect of Filler Content on Transport Properties of Sulfonated Polyether Ether Ketone (SPEEK) Composite Proton Exchange Membranes

3rd International Conference on Manufacturing, Material and Metallurgical Engineering

机械制造;材料科学;冶金学

Chia, Min Yan^1,2 ; Thiam, Hui San^1,2 ; Leong, Loong Kong^1,2 ; Koo, Chai Hoon^1,2

Department of Chemical Engineering, Lee Kong Chian Faculty of Engineering and Science, Universiti Tunku Abdul Rahman, Bandar Sungai Long, Selangor, Kajang, Malaysia^1

Department of Civil Engineering, Lee Kong Chian Faculty of Engineering and Science, Universiti Tunku Abdul Rahman, Bandar Sungai Long, Selangor, Kajang, Malaysia^2

关键词: Compact structures;    Methanol permeability;    Porous membranes;    Properties of composites;    Proton exchange membranes;    Silicotungstic acid;    Sulfonated polyether ether ketones;    Supported on silica;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/409/1/012003/pdf
DOI  :  10.1088/1757-899X/409/1/012003

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Proton exchange membrane for direct methanol fuel cell was developed by the incorporation of silicotungstic acid supported on silica (SiO2-SiWA) into SPEEK polymer. The properties of composite membranes with various silica/SiWA ratios were investigated and compared in this study. It was found that high silica to SiWA weight ratio (2:1) resulted in porous membrane with high proton conductivity and moderate methanol permeability. Reduction in the aforementioned ratio to 1:1 resulted in a more compact structure with better thermal stability, however, leaching of SiWA from the membrane occurred due to insufficient support. SPEEK membrane incorporated with 10 wt% SiO2 and 5 wt% SiWA showed the highest selectivity of 6.44 × 104 S.s/cm3 and performed better than that of the pure SPEEK membrane. These results suggested that these membranes have potential to be considered for DMFCs applications.