A. Mas et al., PHB, P(HB-CO-9-PERCENT HV) AND P(HB-CO-22 -PERCENT HV) MEMBRANES FOR MICROFILTRATION OR PERVAPORATION - FILTRATION PROPERTIES AND SURFACE-STATE, European Polymer Journal, 32(4), 1996, pp. 435-450
Microfiltration porous membranes (J(H2O) = 15,800 1/m(2) . atm . j, r(
p) = 0,25 mu m) and pervaporation dense membranes for ethanol deshydra
tation (J(total) = 0,008 kg/j . m(2), alpha = 12,6) were prepared from
polyhydroxybutyrate, poly(hydroxybutyrate-co-hydroxyvalerate) with 9%
and 22% valerate contents. Different surface structures characterized
with contact angle, surface energy and scanning electronic microscopy
were correlated with filtration properties. Membranes were prepared a
fter immersion coagulation or total evaporation from different ternary
system P-S-NS compositions.