Thin Film Nanocomposite Membranes: Which Medium to Choose for Nanoparticle Integration
Paper ID : 1334-MST2015-FULL
Authors:
Yusak Hartanto, Bo Jin, Sheng Dai
School of Chemical Engineering, The University of Adelaide
Abstract:
Incorporation of nanoparticles into the thin film composite (TFC) membranes to make thin film nanocomposite (TFN) membranes has been introduced during the last decade as a breakthrough in membrane filtration development. To introduce nanoparticles into the thin film layer of TFC membranes, they are either mixed in the aqueous or organic monomer solutions during the interfacial polymerization (IP) course. Although both monomer solutions can be considered as the introduction medium, a smart selection between them is still a controversial issue. The sustainable improvement in the structure and performance of the TFN membranes is highly dependent on the stability of nanoparticles inside the membrane matrix together with their homogeneous and controllable distribution. Herein, to identify the main contribution of each medium, silica nanoparticles with different surface functional groups are synthesized and involved for novel TFN membranes fabrication. The surface functionality of nanoparticles was tuned in a way to make them reactive with both IP monomers. Extensive characterization of the membrane properties and desalination performance was performed to get a better understanding on the role of the introduction medium. The results show that selection of the monomer solution has a profound influence on the distribution of nanoparticles and the resulting TFN membranes’ properties. It was also found that the medium should be chosen differently for each surface functionalized nanoparticle to provide a higher and more reliable desalination performance. The research outcomes will provide new insights into the structure-performance correlation of TFN membranes.
Keywords:
Thin film nanocomposite membrane; Silica nanoparticles; Surface functionalization; Permselectivity; Interfacial polymerization
Status : Paper Accepted (Oral Presentation)