Investigation of electrochemical degradation and application of e-paper dyes in organic solvents

Luhai LI; Ming WANG; Yi FANG; Shunan QIAO

doi:10.1007/s11705-009-0062-3

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Front. Chem. Sci. Eng. ›› 2009, Vol. 3 ›› Issue (2) : 182-185. DOI: 10.1007/s11705-009-0062-3

RESEARCH ARTICLE

Investigation of electrochemical degradation and application of e-paper dyes in organic solvents

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Abstract

To avoid environmental pollution due to organic dye solutions, the electrophoresis and degradation of dye in organic solvents such as alcohol were investigated. Many dyes were tested in the Indium tin oxide (ITO) electrode driving cell, and about 15 dyes moved under voltage driving. Both the curves of ultraviolet-visible (UV-Vis) and infrared (IR) spectra of the electrophoresis samples showed that the metal complexes Red 04 and Acid Black 1 were degradable in alcohol solution by electrochemical reaction. The cyclic volt-ampere curves of the samples from the electrochemical working station proved that electrochemical reactions took place. Based on the analysis of UV-Vis and IR spectra, the electrochemical degradation products of azo and metal complex azo dyes at lower voltage driving (1-5 V) in organic solvents are oxidized azobenzene, not hydrazine, which was found in the electrochemical degradation of dye water solutions. When the ITO electrode is modified by a polyimide (PI) film to a thickness less than 4 μm, the electrochemical degradation of the dye in alcohol solution will not appear in the cyclic volt-ampere curves. A dye electrophoresis in organic solution flexible prototype e-paper display was formed and the display picture is shown.

Keywords

electrochemical degradation / electrophoresis / e-paper / oxidized azobenzene group

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Luhai LI, Ming WANG, Yi FANG, Shunan QIAO. Investigation of electrochemical degradation and application of e-paper dyes in organic solvents. Front Chem Eng Chin, 2009, 3(2): 182‒185 https://doi.org/10.1007/s11705-009-0062-3

References

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Acknowledgements

The study was financially supported by a funding project for academic human resources development in the Institutions of Higher Learning under the jurisdiction of Beijing Municipality (PHR, IHLB).