Behaviour of Composite Membrane Nanopore Cellulosa Acetat-Polistirene (CA-PS) due to Surfactant and Temperature Effect.

Abstract

Membrane can be used for separation because of its superiority such as simple, simplicity, low energy consumption, and environmentally sound product. The cellulose acetate membrane is an example of the environmentally sound product and is used widely, such as in waste water treatment installation. This is the follow-up of the previous research and focused at the modification of cellulose acetate membrane by polystyrene and cetiltrimetyl ammonium bromide (CTAB) as porogen. The experiment was started with production of cellulose acetate membrane with polystyrene and CTAB with compositions of CA:PS:CTAB of 9:1:0.5, 9:1:1, 9:1:1.5, and 9:1:2. The membranes were formed by molding the mixture into films followed by characterisation of water flux value, rejection index at pressure 20 psi, and analysis of the surface morphology of membrane by scanning electron microscope (SEM). The SEM photo showed that temperature and CTAB affected the amount and the size of pores, and membrane surface textures. Increasing water flux and decreasing rejection index were decreasing with the increasing amount of CTAB. The highest water flux value showed by membrane with CTAB 1.5 % (MCCT 3) membrane at 40 ºC temperature, that was 160.6054 (L/m2.jam). Whereas the highest rejection index was in MCCT 2 at 40 ºC temperature, 9.30 %. The SEM photo showed that MCCT 4 membrane soaked in 40 ºC had pore size of 0.25 μm (250 nm) whereas those soaked in 60 ºC temperature had pore size of 0.50 μm (500 nm). These the membranes were classified as nanofilter