#TITLE_ALTERNATIVE#

• Main Author: Sophia (NIM 205 04 016), Halida
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/8002
• Institution: Institut Teknologi Bandung

Abstract: <br /> <br /> <br /> In membrane technology, synthetic polymeric membranes are widely used in many industries. Polysulfone is one of the polymers frequently used in membrane preparation. Polysulfone membranes prepared by phase inversion method shows a low mechanical strength when used in high pressure or self-supporting membranes. In order to improve the mechanical strength of membranes, dioctyl phthalate (DOP) was used as plasticizer. In this research, the membrane composition used were 18percent polysulfone (PSf), 64percent dimetylacetamide and varied concentration of polyethyleneglycol (PEG) and dioctyl phthalate. The characterization included flux, rejection coefficient and mechanical properties. The result showed that the addition of DOP increased both flux and rejection coeffient. The water flux increased up to 1percent (w/w) DOP and then decreased significantly. The optimum condition was obtained at 3percent(w/w) DOP and resulted in rejection of 85.64 percent toward dextran T-500 solution. The presence of DOP in the membrane affected the membrane mechanical properties ; the optimum strength was 6.16 GPa. The morphology analysis by Scanning Electron Microscopy (SEM) showed the typical asymmetric structure where membrane skins had tiny pores and macrovoid structure in sublayer membrane. <br /> <br />