Journal
MATERIALS LETTERS
Volume 137, Issue -, Pages 167-169Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.matlet.2014.08.127
Keywords
Porous materials; Sol-gel preparation; Silica-cellulose aerogels; Phase separation; DMSO
Funding
- National Natural Science Foundation of China [11172082]
- Key Laboratory Opening Funding of Key Laboratory of Science and Technology on Advanced Composites in Special Environments
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Hydrophobic silica-cellulose aerogels (SCAs) were prepared for the first time by the sot-gel process and the supercritical drying (SCD) method. Silica sols were prepared by using dimethyl sulfoxide (DMSO) as solvent to suppress phase separation. The microfibrillated celluloses (MFCs) were extracted by the acid hydrolysis of cotton pulps and then dispersed into silica sols. The results show that the SCAs have the structural and hydrophobic features of silica aerogels. DMSO renders two functions of dispersing MFCs and suppressing phase separation deriving from the silicon alkoxide with hydrophobic groups. (C) 2014 Elsevier B.V. All rights reserved.
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