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Polymer-Attached Functional Inorganic-Organic Hybrid Nano-composite Aerogels

Published online by Cambridge University Press:  11 February 2011

Xipeng Liu ,
Mingzhe Wang  and
William M. Risen Jr
Xipeng Liu
Affiliation:
Department of Chemistry, Brown University, Providence, RI 02912–9108, USA
Mingzhe Wang
Affiliation:
Department of Chemistry, Brown University, Providence, RI 02912–9108, USA
William M. Risen Jr
Affiliation:
Department of Chemistry, Brown University, Providence, RI 02912–9108, USA
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Abstact

Novel materials in which modified inorganic-organic hybrid silica aerogels are attached to polymer chains have been synthesized. The aerogels are based on chitosan, a bioderived polymer from chitin, and they contain silica. The first stage of the modifications includes attachment of isocyanate, amine onto the chitosan chains embedded within the aerogel. These groups are employed in the second stage to develop the reactions required to “string” aerogel particles along functionalized linear polymers or to employ these polymers to crosslink the composite aerogels. The initial chitosan-silica aerogel particles have an ultimate size of about 2nm, and their functionally modified forms were reacted at sizes up to 1 m. These aerogels can take up and hold dyes and water-soluble drugs. The chemistry to synthesize polyamino-siloxane based aerogel composite was discussed. In addition, two approaches to synthesize PHEMA aerogel hybrid were studied.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 740: Symposium I – Nanomaterials for Structural Applications , 2002 , I12.24
Copyright
Copyright © Materials Research Society 2003

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References

REFERENCE

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