PEMBUATAN MEMBRAN FOTOKATALITIK DARI SELULOSA DIASETAT SERBUK GERGAJI KAYU JATI (TECTONA GRANDIS L.F.) DAN TIO2 UNTUK PENGOLAHAN LIMBAH BAKU AIR PDAM

Abstract

Membrane technology is growing rapidly
because of its superiority and has been
widely applied in various industries. The
waste of teak sawdust is increasing as the
furniture industry develops, but its utilization
is not optimal. The purpose of this study was
to determine the effect of the addition of TiO2
on the mechanical properties and
performance of photocalytic membranes
from cellulose diacetate teak sawdust for
processing PDAM water raw materials.
Cellulose isolation from teak sawdust was
carried out by adding NaOH 17.5% (b / v)
and continued with cellulose bleaching
process. Cellulose teak sawdust was
synthesized into cellulose diacetate by
acetylation method. Membrane production is
done by phase inversion method with
variations in the composition of TiO2 0.25%,
0.5%, 0.75% and 1% and also variations in
evaporation time 20 seconds, 25 seconds,
30 seconds and 35 seconds. The photocytic
membrane of cellulose diacetate from teak
sawdust and TiO2 produced was
characterized by thickness test, mechanical
properties and performance. Photocalytic
membranes with optimum conditions are
characterized by SEM (Scanning Electron
Microscopy), FT-IR (Fourier Transform
InfraRed) and antibacterial effectiveness.
The optimum composition of the
photocatalytic membrane is 16% cellulose
diacetate, 4% formamide, acetone 79% and
1% TiO2 with 30 seconds evaporation time.
The mechanical properties obtained were
stress 1562,50000 kN / m2, strains 0.01 m /
m and Young Modulus 141593,4835 kN /
m2. The membrane has an average
thickness of 0.04 mm, a flux value of 683.10
L.m2.hari-1, a rejection value of 97.74% and
an antibacterial effectiveness of 99.57%.