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A New Type of Display Device Based on Remote Swelling and Collapse of a pH Responsive Microgel

Published online by Cambridge University Press:  01 February 2011

Joseph Peter Cook  and
Jason Riley
Joseph Peter Cook
Affiliation:
j.cook06@imperial.ac.ukj.cook@qmul.ac.uk, Imperial College London, Department of Materials, London, United Kingdom
Jason Riley
Affiliation:
jason.riley@imperial.ac.uk, Imperial College London, Department of Materials, London, United Kingdom
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Abstract

Microgel particles of poly(2-vinylpyridine) cross linked with 0.5 wt% divinylbenzene were synthesised. Due to differences in the scattering of light, a dispersion of the particles appears opaque milky white above pH 4.5 and transparent below pH 4.5. The pH of a 0.15 wt% dispersion was modified using a poly(aniline) film as a source/sink of protons and a Ag/AgCl electrode as a source/sink of chloride counterions. The absorption of the sample at 400 nm was typically reduced from c.a. 3.5 to c.a. 0.5 in less than 20 minutes and increased to c.a. 3.2 in less than 20 minutes. This system could form the basis for a new type of display device, but it is insufficiently fast or consistent in its current form.

Keywords

polymercolloidoptical properties
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1134: Symposium BB – Polymer-Based Smart Materials–Processes, Properties and Application , 2008 , 1134-BB08-14
Copyright
Copyright © Materials Research Society 2009

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References

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