Preparation optimization and utilization of PVDF membranes for separation
of indigo textile dyes
a Departement
of Chemistry, Surabaya State University, Surabaya, Indonesia
b Departement of Chemistry, Airlangga University, Surabaya, Indonesia
b Departement of Chemistry, Airlangga University, Surabaya, Indonesia
Abstract
In this
study, has been conducted polyvinylidene fluoride (PVDF) membrane preparation
process using a phase inversion method with immersion-precipitation technique
and its use in the separation of the indigo textile dye. To be able to produce
the highest quality PVDF membrane, conducted research on the effect of casting
solution and non-solvent composition on the morphology, mechanical strength
(young's modulus) , flux and rejection coefficient of PVDF membrane. The
results obtained show that, in the composition of the casting solution
16%PVDF/84%NMP/0%NH4Cl and nonsolvent 50%H2O - 100%H2O,
has been formed a PVDF membrane with asymmetry structure (a combination of
sponge and finger pore) and pore size of 206.1 - 263.9 nm. Meanwhile, the
variations in the composition of casting solution (14% PVDF/84%NMP/2%NH4Cl
- 16%PVDF/84%NMP/0%NH4Cl) and non-solvent composition (100%H2O/0%C2H5OH
- 0%H2O/100%C2H5OH) , produced the PVDF
membrane with mechanical strength and flux, respectively in the range of
1237.62 - 5583.44 N/m2 and 1421,868 - 2214,367 L/m2.jam.
Furthermore, to determine the selectivity of the PVDF membrane in separation
indigo dye, indigo dye (50 ppm) filtration process is carried out on pressure 1
atm and the result is a rejection coefficient values obtained in the range of
82.12 - 95.77%. It shows that the selectivity level of the filtration process
is carried out, has been obtained permeate concentrations were in the range
8.94 - 2.12 ppm. Data analysis using Analysis of Variance (ANOVA) showed a
significant effect of casting solution and non-solvent composition to
mechanical strength, flux and rejection coefficient of PVDF membrane. ©
Research India Publications.
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