## Abstract Novel gel systems demonstrating rhythmically pulsatile mechanical motion similar to that of a heartbeat were developed. Self‐oscillations of swelling and deswelling for the polymer hydrogels were realized by coupling pH and temperature sensitive hydrogels with a non‐linear chemical reac
Phase Transition Behaviors of Self-Oscillating Polymer and Nano-Gel Particles
✍ Scribed by Takamasa Sakai; Yusuke Hara; Ryo Yoshida
- 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: Self‐oscillating polymers and nano‐gel particles consisting of N‐isopropylacrylamide and the ruthenium catalyst of the Belousov‐Zhabotinsky reaction have been prepared. In order to clarify the crosslinking effect on the self‐oscillating behavior, the phase transition behaviors were investigated by measuring the transmittance and the fluorescence intensity of the polymer solution and the gel bead suspension. Cooperative effects due to crosslinking will play an important role for the design of nanoactuators.
Chemical structure of poly(NIPAAm‐co‐Ru(bpy)~3~).
magnified imageChemical structure of poly(NIPAAm‐co‐Ru(bpy)~3~).
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## Abstract **Summary:** Theoretical analysis of the possibility of collapse/swelling phase transition propagation along a polyelectrolyte gel thread has been performed. A differential equation that determines the time dependence of the degree of swelling of polymer thread under the radial mechanic
We prepared submicron-sized N-isopropyl acrylamide (NIPA)-N-cyanomethyl acrylamide (NCMA) copolymer gel particles by precipitation polymerization. Volume phase transition behaviors of gel particles with various compositions and crosslinking density were observed by using photon correlation spectrosc
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