Controlling morphology and porosity of porous siloxane membranes through water content of precursor microemulsion

Peng, Shuhua, Hartley, Patrick G., Hughes, Timothy C. and Guo, Qipeng 2012, Controlling morphology and porosity of porous siloxane membranes through water content of precursor microemulsion, Soft matter, vol. 8, no. 40, pp. 10493-10501.

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Title Controlling morphology and porosity of porous siloxane membranes through water content of precursor microemulsion
Author(s) Peng, Shuhua
Hartley, Patrick G.
Hughes, Timothy C.
Guo, Qipeng
Journal name Soft matter
Volume number 8
Issue number 40
Start page 10493
End page 10501
Total pages 9
Publisher Royal Society of Chemistry
Place of publication Cambridge, England
Publication date 2012
ISSN 1744-683X
1744-6848
Summary Here we report a facile method for controlling the morphology and porosity of porous siloxane membranes through manipulation of the water content of precursor microemulsions. The polymerizable microemulsion precursors consisted of a methacrylate-terminated siloxane macromonomer (MTSM) as the oil phase, nonionic surfactant (Teric G9A8), water, and cosurfactant (isopropanol). Photo-polymerization of the oil phase in the parent microemulsion solutions resulted in polymeric solids, and subsequent removal of the extractable components yielded porous PDMS membranes. The pre-cured parent microemulsion solutions and post-cured polymers were characterized by small angle X-ray scattering (SAXS) while the nanostructures of extracted porous polymer membranes were characterized by SAXS, scanning electron microscopy (SEM) and mercury porosimetry. The results indicated that nano- and micro-structures of the membranes could be modulated by the water content of the precursor microemulsions. Further, in situ photo-rheometry was used to follow the microemulsion polymerization process. The rate of polymerization and the mechanical properties of the resulting PDMS membranes also depend on the water content of precursor microemulsions. This study demonstrates a simple approach to the fabrication of a variety of novel porous PDMS membranes with controllable morphology and porosity.
Language eng
Field of Research 109999 Technology not elsewhere classified
Socio Economic Objective 970110 Expanding Knowledge in Technology
HERDC Research category C1 Refereed article in a scholarly journal
Persistent URL http://hdl.handle.net/10536/DRO/DU:30051183

Document type: Journal Article
Collection: Institute for Frontier Materials
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