Polymethylsilsesquioxane–Cellulose Nanofiber Biocomposite Aerogels with High Thermal Insulation, Bendability, and Superhydrophobicity

Polymethylsilsesquioxane–cellulose nanofiber (PMSQ-CNF) composite aerogels have been prepared through sol-gel in a solvent containing a small amount of CNFs as suspension. Since these composite aerogels do not show excessive aggregation of PMSQ and CNF, the original PMSQ networks are not disturbed....

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Published inACS applied materials & interfaces Vol. 6; no. 12; pp. 9466 - 9471
Main Authors Hayase, Gen, Kanamori, Kazuyoshi, Abe, Kentaro, Yano, Hiroyuki, Maeno, Ayaka, Kaji, Hironori, Nakanishi, Kazuki
Format Journal Article
LanguageEnglish
Published United States American Chemical Society 25.06.2014
Subjects
organic-inorganic hybrids
polymethylsilsesquioxane
thermal insulation
cellulose nanofibers
composite aerogels
sol-gel
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Summary:Polymethylsilsesquioxane–cellulose nanofiber (PMSQ-CNF) composite aerogels have been prepared through sol-gel in a solvent containing a small amount of CNFs as suspension. Since these composite aerogels do not show excessive aggregation of PMSQ and CNF, the original PMSQ networks are not disturbed. Composite aerogels with low density (0.020 g cm–3 at lowest), low thermal conductivity (15 mW m–1 K–1), visible light translucency, bending flexibility, and superhydrophobicity thus have been successfully obtained. In particular, the lowest density and bending flexibility have been achieved with the aid of the physical supporting effect of CNFs, and the lowest thermal conductivity is comparable with the original PMSQ aerogels and standard silica aerogels. The PMSQ-CNF composite aerogels would be a candidate to practical high-performance thermal insulating materials.
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ISSN:1944-8244
1944-8252
DOI:10.1021/am501822y