NDLI: Preparation and properties of PMMA modified silica aerogels from diatomite

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Preparation and properties of PMMA modified silica aerogels from diatomite

Content Provider	Springer Nature Link
Author	Ma, Hainan Wang, Baomin Zhao, Lei Yuna, Dawei
Copyright Year	2014
Abstract	Diatomite was used as raw material to prepare sodium silicate with a modulus of 3.1 by alkali dissolution method and the resulted sodium silicate solution was employed as a precursor. Methyl methacrylate monomers were introduced in wet gels through solution-immersion, and upon heating at 70 °C, the mesoporous surfaces throughout the skeletal framework were coated with the polymer layer. PMMA modified silica aerogels were successfully synthesized via ambient pressure drying. The properties were investigated by FTIR, NMR, TGA, nitrogen adsorption-desorption, FESEM and nano-indentation, etc. Results indicate that with the increasing of PMMA incorporated into silica aerogels, the bulk density and the BET surface area increase, the porosity decreases. Through the observation of FESEM, it is found that the interconnecting pores and the big pores add, the pore size distribution expands from 5–17 to 28–150 nm. By comparison, the PMMA modified silica aerogels achieve a 52-fold increase in hardness and a 10-fold increase in modulus.
Starting Page	877
Ending Page	884
Page Count	8
File Format	PDF
ISSN	10002413
Journal	Journal of Wuhan University of Technology-Mater. Sci. Ed.
Volume Number	29
Issue Number	5
e-ISSN	19930437
Language	English
Publisher	Wuhan University of Technology
Publisher Date	2014-10-04
Publisher Place	Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	silica aerogels PMMA diatomite ambient pressure drying mechanical properties Materials Science
Content Type	Text
Resource Type	Article
Subject	Materials Science

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