DESIGN OF NANOCOMPOSITE FILTER BASED ON NANOCELLULOSE, MICROCELLULOSE AND NANOSILICA FOR CROSS FLOW AND DEAD END DESALINATION APPLICATION

• Main Author: Aprilmar, Althaf
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/46702
• Institution: Institut Teknologi Bandung

This study designed a desalination system consisting of thin sheet membranes. This membrane is composed of nanocellulose, microcellulose and nanosilica and uses binder, namely chitosan. Cellulose is formed with the help of the bacterium Gluconacetobacter Xylinus. Silica is synthesized with Tetraethylortosilicate (TEOS) precursors with the Stober method. Filtration membrane testing is done by two methods, dead end and cross flow. Characterization carried out in this study uses EDX (Energy Dispersive X-ray Spectroscopy) methods, SEM (Scanning Electron Microscopy), TEM (Transmission Electron Microscopy), FTIR (Fourier-Transform Infrared Spectroscopy) and MicroCT Scanning to determine the spread of silica particles on the surface of membrane filtration. Nanosilica synthesis was added capping agent, Polyvinyl Alcohol (PVA) to get a smaller size of silica. The membrane formed can be operated at pressures below 5 bar. Synthesis of nanosilica produces silica particle sizes ranging from 70-100 nm. Membranes made have been tested for desalination by dead end and cross flow filtration methods. From the test, a maximum salt rejection of 3% on membrane B and a maximum flux of 14.2 kL / m2h on membrane B with the dead end method, whereas with the cross flow method, maximum salt rejection of 1.4% on membrane A and flux the maximum obtained is 14.4 kL / m2h on membrane C