Supramolecular Gels Based on Multi-Walled Carbon Nanotubes Bearing Covalently Attached Cyclodextrin and Water-Soluble Guest Polymers
✍ Scribed by Michael Klink; Helmut Ritter
- Publisher
- John Wiley and Sons
- Year
- 2008
- Tongue
- English
- Weight
- 184 KB
- Volume
- 29
- Category
- Article
- ISSN
- 1022-1336
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✦ Synopsis
Abstract
The preparation of associative networks containing multi‐walled carbon nanotubes (MWCNTs) with covalently attached cyclodextrin (CD) rings and poly[(isobutylene)‐co‐(maleic anhydride)‐co‐(maleic acid‐(4‐tert‐butylphenyl)amide)] in water is described in this study. The synthesis of CD containing MWCNTs is realized by an amidation reaction of oxidized MWCNTs with propargylamine followed by a 1,3‐dipolar cycloaddition with CD‐azide. Dispersion behavior indicated the high stability of these networks. An increase in viscosity compared to a solution of pure polymer as a cause of network formation is observed. The addition of a CD‐decomposing enzyme (taka‐diastase from Aspergillus oryzae) let the network collapse and results in sedimentation of the modified MWCNTs.
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