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Combination effect pigments with enhanced fluorescence

Sevinç Sevim Kahya (Kimya Mühendisliği Bölümü, Orta Dogu Teknik Universitesi, Ankara, Turkey)
Yasemin Sönmez (Kimya Mühendisliği Bölümü, Orta Dogu Teknik Universitesi, Ankara, Turkey)
Güngör Gündüz (Kimya Mühendisliği Bölümü, Orta Dogu Teknik Universitesi, Ankara, Turkey)
Bora Mavis (Makina Mühendisliği Bölümü, Hacettepe Universitesi, Ankara, Turkey)

Pigment & Resin Technology

ISSN: 0369-9420

Article publication date: 18 June 2019

Issue publication date: 5 July 2019

227

Abstract

Purpose

The purpose of this paper is to enhance the limited fluorescence of mica titania (MT) effect pigments by coating them with peripherally substituted zinc phthalocyanines (ZnPc).

Design/methodology/approach

The effects of deposition medium, temperature, time, initial organic pigment/MT ratio on deposition behaviour and efficiencies were investigated separately for ZnPc, nitro (TNZnPc) and amino (TAZnPc) substituted ZnPc’s.

Findings

TNZnPc could be deposited in the form of well-defined crystals on MT with per cent 64 ± 5 efficiency in chloroform at 50°C within 5 h and the amount deposited was linearly dependent on the initial TNZnPc concentration. TNZnPc fluorescence emissions, which appear mainly at 460 and 685 nm in pure pigments, could be observed in combination with MT (MT-TNZnPc) as well. A spectral analysis on the non-overlapping region of the spectrum with two different excitations (385 and 630 nm) revealed that, respectively, up to threefold to sixfold increase is possible to attain, depending on the excitation wavelengths.

Research limitations/implications

Efficiency of deposition could not be taken above per cent 11 ± 4 with TAZnPc. Although ZnPc could be deposited with per cent 57 ± 3 efficiency, the pigment was not effective in imposing its fluorescence characteristics over MT.

Originality/value

Combining inorganic effect pigments with organic dye molecules is an idea that has been elaborated mainly for producing different colour effects and stabilization of dye molecules against agglomeration. Here, for the first time, it is used to enhance the fluorescence of the effect pigments.

Keywords

Acknowledgements

Authors would like to thank; Professor Dr Ahmet Önal for his invaluable advice and help in fluorescence measurements of TNZnPc, Professor Dr Vefa Ahsen for his advices on phthalocyanine purification, and Kar Kimya San. Ltd. Şti. and Betek Boya San. A.Ş. for providing the resins of some paints produced in these studies. Authors also acknowledge the partial financial supports provided by Orta Doğu Teknik Üniversitesi (Grant No’s: BAP-07-02.2009.00.01, BAP-2011-03-04-10).

Erratum: It has been brought to the attention of the publisher that the article Sevinc Sevim Kahya, Yasemin Sonmez, Gungor Gunduz and Bora Mavis, “Combination effect pigments with enhanced fluorescence”, published in Pigment and Resin Technology, failed to include an acknowledgment and the appendix containing supplementary data. The publisher apologises for any confusion and inconvenience caused.

Citation

Kahya, S.S., Sönmez, Y., Gündüz, G. and Mavis, B. (2019), "Combination effect pigments with enhanced fluorescence", Pigment & Resin Technology, Vol. 48 No. 4, pp. 277-292. https://doi.org/10.1108/PRT-07-2018-0069

Publisher

:

Emerald Publishing Limited

Copyright © 2019, Emerald Publishing Limited

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