Influence of Hot Pressing on the Pore Structure of Nafion Electrolyte Membrane Investigated by 1H NMR

Bulletin of the Korean chemical society

Soon Yong Jeonga¹  Oc Hee Han¹ 

关键词: NMR spectroscopy;    Nafion;    Hot pressing;    Pore size;    Cryoporometry;   

DOI  :  

学科分类：化学（综合）

来源: Korean Chemical Society

【 摘 要 】

The influence of hot pressing on the pore structures of Nafion membranes was investigated by observing the Nafion before and after hot pressing with 1H nuclear magnetic resonance (NMR) spectroscopy. The freezing point depression and chemical shift data of water in the Nafion indicated the presence of two different pore size ranges in Nafion. Hot pressing mainly reduced the sizes and number of the big pores. The reduction of water uptake and proton conductivity after hot pressing was explained by this variation of pore size and number. We demonstrated the potential application of chemical shift data and NMR cryoporometry experiments to measure the relative pore sizes, on a nano scale, and numbers.

【 授权许可】

Unknown