Du, M, Mao, N orcid.org/0000-0003-1203-9773 and Russell, S orcid.org/0000-0003-0339-9611 (2016) Control of porous structure in flexible silicone aerogels produced from methyltrimethoxysilane (MTMS): the effect of precursor concentration in sol–gel solutions. Journal of Materials Science, 51 (2). pp. 719-731. ISSN 0022-2461
Abstract
Controllable nanoporous structure in MTMS-based silicone aerogels is required to improve their thermal conductivity. Silicone aerogels were formed in a two-step acid–base catalysed sol–gel process combined with supercritical drying. The influence of MTMS concentration, specifically the molar ratio of methanol:MTMS and water:MTMS in the sol–gel process was studied in relation to the porous structure of resultant silicone aerogels. Samples were characterised to determine the dimensions of micro, meso and macro-pore structure by means of both nitrogen gas adsorption–desorption for detection of pores <300 nm and by analysis of FEG-SEM images for pores >300 nm. Porosity, pore volume distribution and Brunau er–Emmitt–Teller surface area in the silicone aerogels were all found to be influenced by adjustment of the molar ratio of methanol:MTMS and the molar ratio of water:MTMS during sol–gel processing.
Metadata
Item Type: | Article |
---|---|
Authors/Creators: |
|
Copyright, Publisher and Additional Information: | © 2015, Springer Science+Business Media New York. This is an author produced version of a paper published in Journal of Materials Science. Uploaded in accordance with the publisher's self-archiving policy. The final publication is available at Springer via http://dx.doi.org/10.1007/s10853-015-9378-1 |
Keywords: | aerogel; sol–gel; precursor concentration; porous structure; flexible aerogel |
Dates: |
|
Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Arts, Humanities and Cultures (Leeds) > School of Design (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 06 Nov 2015 11:03 |
Last Modified: | 28 Aug 2020 12:43 |
Published Version: | http://dx.doi.org/10.1007/s10853-015-9378-1 |
Status: | Published |
Publisher: | Springer Verlag |
Identification Number: | 10.1007/s10853-015-9378-1 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:91563 |