PREPARATION OF POROUS PDMS MEMBRANES VIA PHASE SEPARATION
A new method has been developed for creating self-assembling or self-organizing materials. The method combines on in-situ polymerization with phase-separation in a two-step process to create porous membranes. The advantage of this method is that it combines synthesis of cross-linked, stable (solvent resistant) PDMS with a self-assembly step (phase separation) in order to cure PDMS into a membrane with an ordered porous structure. Three phase separation methods have been attempted in order in this process—non-solvent vapor condensation induced phase separation (VIPS), solvent-nonsolvent induced phase separation (SNIP), and emulsion with solvent-nonsolvent induced inversion phase separation (eSNIPS); whereas the immersion method was left out due to infeasibility for finding compatible solvent-nonsolvents that pair with PDMS.
Materials Science; honeycomb structure; PDMS; Phase seperation; Polymer chemistry
Giannelis, Emmanuel P.
Materials Science and Engineering
M.S., Materials Science and Engineering
Master of Science
dissertation or thesis