Permselectivity and temperature-dependent permeability of polyaniline membranes

被引:14
作者
Ball, IJ
Huang, SC
Su, TM
Kaner, RB
机构
[1] UNIV CALIF LOS ANGELES,CTR SOLID STATE SCI,LOS ANGELES,CA 90095
[2] CITY COLL SAN FRANCISCO,DEPT CHEM,SAN FRANCISCO,CA 94112
关键词
polyaniline and derivatives; solid/liquid interfaces; solid/gas interfaces;
D O I
10.1016/S0379-6779(96)04152-5
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
An understanding of the mechanism of permeability in both doped and undoped polyaniline is obtained through permselectivity studies. Pervaporation experiments are used to determine the permeability of carboxylic acid/water mixtures through both doped and undoped polyaniline membranes. Swellability experiments are used to determine solubilities, enabling diffusivity values to be calculated. Doped polyaniline membranes show a marked improvement in separating water from carboxylic acid/water mixtures as compared to undoped membranes, particularly in the cases of acetic acid and propionic acid. However, the permeant fluxes of acetic acid/water mixtures through doped polyaniline membranes are lower than the fluxes through undoped polyaniline. The permeability behavior of acetic acid, water and acetic acid/water mixtures are investigated between 20<degrees.C and 100<degrees.C. The flux of 50% acetic acid/50% water mixtures through doped polyaniline doubles between 20<degrees.C and 85<degrees.C, while the flux through undoped polyaniline over the same temperature range shows a 10-fold increase. From this data, the activation energies of permeation for 50% acetic acid/50% water are calculated to be 2.5 kcal/mol through doped polyaniline membranes and 8.1 kcal/mol through undoped polyaniline.
引用
收藏
页码:799 / 800
页数:2
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