| Summary: | 碩士 === 中原大學 === 化學工程研究所 === 82 === TPX membranes were prepared via a wet phase inversion method in
order to improve the gas flux of TPX membrane prepared by
solvent evaporation method. The effects of the conditions of
preparation process, casting solution and coagulation medium on
the formation and gas separation performances of the membranes
were investigated. The membrane formation and morphology were
studied with respect to solubility parameter, surface tension
and capillary force. The O2/N2 selectivity of 2.66 and pressure-
normalized oxygen flux of 103×10-6cm3(STP)/cm2-sec-cmHg can be
obtained for the TPX membrane prepared from 5﹪( TPX(gram)/
Chloroform(cm3) ) casting solution, first coagulation medium
with 25℃ methanol, second coagulation medium with 20℃
methanol, drying membrane method was 25℃ air convective dry,
and without heat treatment. The high gas flux of the membrane
was rapidly decreased with storage time under 25℃ and RH40﹪.
No gas flux decay with storage time was observed for the
membrane with 50℃ 12hr heat treatment. The oxygen flux and O2/
N2 selectivity of the heat- treated membrane were 13.3×10-6cm3(
STP)/cm2-sec-cmHg and 3.55, respectively. The gas fluxs of
membranes prepared via a wet phase inversion method were much
higher than that of membranes prepared by solvent evaporation
method.
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