Color Transition Properties of Water Dispersible Polydiacetylene Particles Conjugated with the Thermosensitive Polymer

Izumi Harano; Chigusa Okano; Yuriko Takayama; Eri Nasuno; Ken-ichi Iimura; Norihiro Kato

doi:10.4028/www.scientific.net/AMM.863.38

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vol. 863Color Transition Properties of Water Dispersible...

Color Transition Properties of Water Dispersible Polydiacetylene Particles Conjugated with the Thermosensitive Polymer

Abstract:

An assembly of diacetylene molecules is necessary to progress a topochemical reaction as UV-irradiated polymerization. In this study, we attempt to regularly assemble 10, 12- pentacosadiynoic acid (PCDA) by freezing the solution, followed by lyophilization. Dried PCDA assembly was easily dispersed in aqueous solution by sonication. Irradiation of UV light can promote polymerization reaction of PCDA judging from a color change of the solution into blue. A color transition of the polyPCDA-dispersed solution from blue to red was observed at approximately 56°C due to distortion of its π-conjugated system. A color transition temperature could be controlled by hybridization with thermosensitive hydroxypropyl cellulose, of which lower critical solution temperature appears around 38-39°C. By synchronizing to coli-globule transition of HPC in aqueous media, blue-red transition response of water-dispersed polyPCDA could be induced by changing conformation of surrounded polymer.

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Periodical:

Applied Mechanics and Materials (Volume 863)

Pages:

38-43

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.863.38

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Online since:

February 2017

Authors:

Izumi Harano, Chigusa Okano, Yuriko Takayama, Eri Nasuno, Ken-ichi Iimura, Norihiro Kato*

Keywords:

Hydroxypropyl Cellulose, Lower Critical Solution Temperature, Polydiacetylene, Topochemical Reaction

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