Gel-to-Sol and Sol-to-Gel Transitions Utilizing the Interaction of α-Cyclodextrin with Dodecyl Side Chains Attached to a Poly(acrylic acid) Backbone
✍ Scribed by Itsuro Tomatsu; Akihito Hashidzume; Akira Harada
- Publisher
- John Wiley and Sons
- Year
- 2005
- Tongue
- English
- Weight
- 149 KB
- Volume
- 26
- Category
- Article
- ISSN
- 1022-1336
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✦ Synopsis
Abstract
Summary: By utilizing the interaction of α‐cyclodextrin (α‐CD) with dodecyl side chains in polymers of x mol‐% dodecyl‐modified poly(acrylic acid) (p(AA/C~12~(x))), systems that undergo gel‐to‐sol and sol‐to‐gel transitions were successfully constructed. Rheological experiments indicated that addition of α‐CD to the hydrogel of p(AA/C~12~(5)) caused a drastic decrease in the viscosity, while addition of oligo(α‐CD) to the solution of p(AA/C~12~(2)) led to a remarkable increase in the viscosity.
Photographs for a gel‐to‐sol transition upon addition of α‐CD to 5.0 g · L^−1^ p(AA/C~12~(5)).
magnified imagePhotographs for a gel‐to‐sol transition upon addition of α‐CD to 5.0 g · L^−1^ p(AA/C~12~(5)).