In-situ Fabrication of Silver-PDMS Nanocomposite Membrane with Application in Olefin Separation
Paper ID : 1120-MST2015-FULL
In this study, silver nanoparticle-PolydimethylSiloxane membrane (SNP-PDMS) was prepared with an in-situ reduction method using AgNO3 in poly (dimethylsiloxane) hardener. Optical and mechanical properties as well as functionality of these membranes were determined employing, UV-Vis spectrophotometry and strain-stress test. Silver nanoparticles are known to selectively absorb Olefins and may be used for separation of Alkanes from olefins. Yellow color of silver nanocomposites and transparency of blank polymer were observed employing optical microscope. λmax around 415-420 nm regions in UV-Vis spectrophotometry are related to silver nanoparticles absorbance. Based on stress-strain test results, tensile strength of silver nanoparticle PDMS (SNP-PDMS) membranes is higher than PDMS films of comparable size and thickness. Moreover, permeability of SNP-PDMS membranes were characterized using an olefin/paraffin pair using a simple bench scale swelling set- up. The silver -PDMS membranes retain their color and UV-vis characteristics for extended periods of time exceeding several months.
Nanocomposite membrane, Olefin separation, Facilitated transport, Silver nanocomposite, PDMS, in-situ reduction
Status : Paper Accepted (Poster Presentation)