Synthesis of alumina aerogels from AlCl3·6H2O with an aid of acetoacetic-grafted polyvinyl alcohol

Synthesis of alumina aerogels from AlCl3·6H2O with an aid of acetoacetic-grafted polyvinyl alcohol * Rui Zhang zhangrui@sit.edu.cn School of Materials Sciences and Engineering, Shanghai Institute of Technology, Shanghai 2001418, P. R. China 1234567890();,: 1234567890();,: Journal of Sol-Gel Science and Technology (2018) 87:486–495 487 Highlights Acetoacetic group is grafted on polyvinyl alcohol via esterification reaction with a -OH conversion of about 80%. 3+ Acetoacetic group on polyvinyl alcohol forms complex with Al and Al-clusters to obtain AlCl ·6H O sols with a high 3 2 concentration. The shrinkage of gels in sol-gel and supercritical drying steps are decreased significantly via an aid of the acetoacetic- grafted polyvinyl alcohol. The resulting aluminum aerogels have a high density, high mechanical strength, and high mesoporosity. ● ● ● Keywords Alumina aerogel Sol-gel process Template Polyvinyl alcohol 1 Introduction hydrophobic surface modification agent (trimethylethox- ysilane) or surface-modified with a mixture of aluminum Alumina aerogels are materials with interesting properties, trisec-butoxide and trimethylethoxysilane in the super- such as low density, high-temperature stability, high por- critical ethanol drying step [15]. An alkoxide chemical osity, and high-surface area, which make them advanta- liquid deposition method are employed to prepare core-shell geous in several industrial applications such as catalysis [1, structured and mullite fiber-reinforced alumina aerogels 2] and thermal insultation [3] http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Sol-Gel Science and Technology Springer Journals

Synthesis of alumina aerogels from AlCl3·6H2O with an aid of acetoacetic-grafted polyvinyl alcohol

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Publisher
Springer US
Copyright
Copyright © 2018 by Springer Science+Business Media, LLC, part of Springer Nature
Subject
Materials Science; Ceramics, Glass, Composites, Natural Materials; Inorganic Chemistry; Optical and Electronic Materials; Nanotechnology
ISSN
0928-0707
eISSN
1573-4846
D.O.I.
10.1007/s10971-018-4679-x
Publisher site
See Article on Publisher Site

Abstract

* Rui Zhang zhangrui@sit.edu.cn School of Materials Sciences and Engineering, Shanghai Institute of Technology, Shanghai 2001418, P. R. China 1234567890();,: 1234567890();,: Journal of Sol-Gel Science and Technology (2018) 87:486–495 487 Highlights Acetoacetic group is grafted on polyvinyl alcohol via esterification reaction with a -OH conversion of about 80%. 3+ Acetoacetic group on polyvinyl alcohol forms complex with Al and Al-clusters to obtain AlCl ·6H O sols with a high 3 2 concentration. The shrinkage of gels in sol-gel and supercritical drying steps are decreased significantly via an aid of the acetoacetic- grafted polyvinyl alcohol. The resulting aluminum aerogels have a high density, high mechanical strength, and high mesoporosity. ● ● ● Keywords Alumina aerogel Sol-gel process Template Polyvinyl alcohol 1 Introduction hydrophobic surface modification agent (trimethylethox- ysilane) or surface-modified with a mixture of aluminum Alumina aerogels are materials with interesting properties, trisec-butoxide and trimethylethoxysilane in the super- such as low density, high-temperature stability, high por- critical ethanol drying step [15]. An alkoxide chemical osity, and high-surface area, which make them advanta- liquid deposition method are employed to prepare core-shell geous in several industrial applications such as catalysis [1, structured and mullite fiber-reinforced alumina aerogels 2] and thermal insultation [3]

Journal

Journal of Sol-Gel Science and TechnologySpringer Journals

Published: May 31, 2018

References

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