期刊
JOURNAL OF MATERIALS SCIENCE
卷 51, 期 2, 页码 719-731出版社
SPRINGER
DOI: 10.1007/s10853-015-9378-1
关键词
-
资金
- Overseas Research Studentship (UK)
- University of Leeds Research Studentship
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.
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