| dc.description.abstract | Modification of ultrafiltration membranes of polysulfone in polysulfone/N,Ndimethylacetamide/
water ternary system by phase inversion technique and its studies
to protein fouling has been done. Polymeric membranes modified by addition of
additive and variation of evaporation time. The membranes were prepared from dope
solutions containing polysulfone (PSf) 35 kD as polymer, N,Ndimethylacetamide
(DMAc) as solvent, and poly(ethylene glycol) (PEG) as additive. There were two
compositions of dope solutions; PSf 18 % + DMAc 82% + non PEG (PSf A) and PSf
18 % + DMAc 72% + PEG 10% (PSf B). Dope solutions were cast in different
evaporation times (0, 0.5, and 1 minute) before immersion into the pure water
coagulation bath. Then membranes were characterized their physical properties
(densities, swelling degree, and mechanical force), membrane performance, and
protein fouling. The result that revealed the increase of evaporation time and PEG
addition increased densities, swelling degree, and mechanical force of polysulfone
membranes. Meanwhile membrane performance decreases significantly with the
increase of evaporation time, but membrane performance increase with addition of
PEG. Fouling charaterization by BSA caused irreversible protein adsorption and
aggregation fouling. | en_US |
