Sa. Gordeyev et al., Processing and properties of polysulfone hollow fibre membranes for gas separation filled with sub-micron carbon fibres, MACRO SYMP, 170, 2001, pp. 273-281
Polysulfone hollow fibre membranes, of the type produced previously with en
hanced gas separation properties, were filled with vapour grown carbon fibr
es (VGCF) of sub-micron diameter. The effect of filler content on mechanica
l and gas permeation characteristics was studied. Hollow fibre membranes fi
lled with up to 2.8 vol. % of VGCF were produced using forced convection dr
y jet/wet spinning. Fibre stiffness increased with increasing VGCF filler c
ontent. The fibres with the highest concentration of filler were about 30 %
more stiff than unfilled membranes. The addition of VGCF lead to a rise in
permeability and some decrease in selectivity.