The Effect of Polymethylmethacrylate and Tetraethylorthosilicate Concentration on PMMA/SiO2 Hybrid Membrane Properties

• Main Author: Jaya Ratri (NIM 105 03 059), Paramita
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/6593
• Institution: Institut Teknologi Bandung

Abstract : <br /> <br /> <br /> <br /> Hybrid materials have been developed as ultrafiltration and nanofiltration membranes. The objective of this experiment is to study the effect of polymethylmethacrylate (PMMA) and tetraothoxyorthosilicate (TEOS) concentrations on PMMA/SiO2 hybrid membrane properties. PMMA/SiO2 membrane was made by sol gel technique using three different solvents, i.e. tetrahydrofuran (THF), toluene, and dimethylformamide (DMF). Characterization of membranes included permeability and permselectivity determination, Fourier Transformed Infra Red (FTIR) spectroscopy, Scanning Electron Microscopy (SEM), and Energy Dispersive X-Ray (EDX). The results showed that the best solvent for hybrid membrane syntesis was THF. The addition of TEOS enlarged the membrane pore size and increased the number of pores. The increase of PMMA concentration resulted in smaller pores. Membranes hybrid having 10% and 15% of PMMA in THF both flux and rejection coefficient increased by the addition of TEOS. The optimal composition found in this work is H05-S02,5-THF membrane (contain of 5% solution of PMMA and 2,5% TEOS using THF solvent) with a water permeability of 6,4833 Lm-2h-1bar-1 and a rejection coefficient of 76,52% toward dextran T-500. The FTIR spectrum showed that Si-O-Si bond and sylanol group which became higher by the increase of both PMMA dan TEOS concentration. The data of SEM and permselectivity showed that PMMA/SiO2 membrane was classified as ultrafiltration membrane with asymmetric pore structure.