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Publication type: Article in scientific journal
Type of review: Peer review (publication)
Title: Indigo in the nanochannels of zeolite L : towards a new type of colorant
Authors: Woodtli, Pascal
Giger, Sandro
Müller, Patrick
Sägesser, Lucie
Zucchetto, Nicola
Reber, Michael
Ecker, Achim
Brühwiler, Dominik
DOI: 10.21256/zhaw-1367
Published in: Dyes and Pigments
Volume(Issue): 2018
Issue: 149
Page(s): 456
Pages to: 461
Issue Date: 2018
Publisher / Ed. Institution: Elsevier
ISSN: 0143-7208
Language: English
Subjects: Indigo; Zeolite; Nanochannel; Host-Guest; Intercalation; Reductive washing
Subject (DDC): 540: Chemistry
660: Chemical engineering
Abstract: A host-guest based colorant was synthesized by intercalating indigo molecules into the nanochannels of zeolite L (ZL). Reductive washing thereby ensured the efficient and selective removal of non-intercalated indigo molecules. The UV-vis diffuse reflectance spectrum of the product after intercalation and reductive washing (designated as indigo-ZL) was found to resemble the solution spectrum of indigo, leading to the conclusion that the formation of indigo aggregates is prevented due to the steric constraints imposed by the microporous structure of ZL. The application of indigo-ZL on cotton was tested by roll coating. The light absorption properties of the resulting textile prints showed no significant alteration when compared to the pure indigo-ZL powder. The UV-vis diffuse reflectance spectra of mixtures consisting of indigo-ZL and a further ZL-based colorant were successfully predicted by the weighted addition of the respective primary spectra.
Fulltext version: Accepted version
License (according to publishing contract): CC BY-NC-ND 4.0: Attribution - Non commercial - No derivatives 4.0 International
Restricted until: 2019-11-06
Departement: Life Sciences and Facility Management
Organisational Unit: Institute of Chemistry and Biotechnology (ICBT)
Published as part of the ZHAW project: True Color Pigments
Appears in collections:Publikationen Life Sciences und Facility Management

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