| dc.description.abstract | Polysulfone and cellulose acetate are common material in separation. In this
research, polysulfone/cellulose actetate (PSF/CA) blend membrane was prepared. The aim of
this research was to study effect of evaporation time in casting of PSF/CA membrane and its
performance in filtration. CA was obtained by acetylation process of bacterial cellulose (BC)
from fermentation of coconut water. Fourier Transform Infra Red (FTIR) Spectroscopy was
used to examine functional groups of BC, CA and commercial cellulose acetate. Subtitution of
acetyl groups determined by titration method. Blend membranes were prepared through phase
inversion technique in which composition of PSF/PEG/CA/NMP(%w) was 15/5/5/75.
Polyethyleneglycol (PEG) and N-methyl-2-pyrrolidone (NMP) were act as pore forming agent
and solvent, respectively. Variation of evaporation times were used as parameter to examine
water uptake, flux, and morphology of PSF/CA blend membranes. FTIR spectra of CA show
characteristic peak of acetyl group at 1220 cm
-1
indicated that BC was acetylated succesfully.
Degree of subtitution of BCA was found at 2.62. Highest water flux was performed at 2 bar
obtained at 106.31 L.m
-2
.h
-1
at 0 minute variation, and decrease as increasing evaporation time.
Morphology of PSF/BCA blend membranes were investigated by Scanning Electron
Microscopy (SEM) showed that porous asymetric membrane were formed. | en_US |
