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Diketopyrrolopyrrole pigment core@multi-layer ▫$SiO_2$▫ shell with improved photochemical stabilityŠvara Fabjan, Erika ...A model organic pigment (diketopyrrolopyrrole) is encapsulated by a silica coating in order to improve its photochemical stability. Unlike in previous works where single-layer silica coatings were ... used for similar purposes, we here propose creation of a multi-layer silica shell synthesized via in-situ sol-gel method, which should significantly improve the homogeneity and thus the protection ability of the coating. This is done by repeating the basic two-step process (pigment surface modification and silica encapsulation) several times, creating the final protective shell in a layer-by-layer fashion. The compositional and structural properties of the prepared coatings is studied using Fourier-transform infrared spectroscopy, differential thermal and thermogravimetric analysis, nitrogen adsorption measurements and transmission electron microscopy. Photochemical stability of non-encapsulated and encapsulated pigment particles is evaluated via the so-called fast-irradiation method. Various correlations between the essential coating properties, such as thickness, porosity, SiO2 content, and the corresponding photochemical stability of the samples are established and discussed in detail. As a whole, our results confirm the basic hypothesis, that multiple-layered silica shells show improved pigment protection ability in comparison to the single-layer coatings.Source: Dyes and pigments. - ISSN 0143-7208 (Vol. 156, Sep. 2018, str. 108-115)Type of material - article, component part ; adult, seriousPublish date - 2018Language - englishCOBISS.SI-ID - 2357351
Author
Švara Fabjan, Erika |
Saghi, Zineb |
Midgley, Paul A. |
Otoničar, Mojca, 1982- |
Dražić, Goran |
Gaberšček, Miran |
Sever Škapin, Andrijana
Topics
organski pigmenti |
SiO2 sloj |
enkapsulacija |
morfologija |
fotokemijska stabilnost |
organic pigments |
silica coating |
encapsulation |
morphology |
photocemical stability
Author | Švara Fabjan, Erika ... |
Title | Diketopyrrolopyrrole pigment core@multi-layer ▫$SiO_2$▫ shell with improved photochemical stability |
Publication date | 2018-03-29 |
COBISS.SI-ID | 2357351 |
Publication version in repository | Publisher's version |
Publication licence | Creative Commons Attribution 4.0 International |
Embargo | Immediate publication for public |
Project(s) from which the publication was funded
Title | Acronym | Project ID | Funder |
---|---|---|---|
Kolorimetrično določanje relativne vlažnosti na osnovi mezoporoznih SiO2 delcev | Z1-8149-2017 |
Javna agencija za znanstvenoraziskovalno in inovacijsko dejavnost Republike Slovenije |
|
Gradbeni objekti in materiali | P2-0273-2019 |
Javna agencija za znanstvenoraziskovalno in inovacijsko dejavnost Republike Slovenije |
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Link |
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https://www.sciencedirect.com/science/article/pii/S0143720818301177 |
https://dirros.openscience.si/IzpisGradiva.php?id=18572 |
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Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Švara Fabjan, Erika | 32022 |
Saghi, Zineb | |
Midgley, Paul A. | |
Otoničar, Mojca, 1982- | 29547 |
Dražić, Goran | 02556 |
Gaberšček, Miran | 00582 |
Sever Škapin, Andrijana | 12521 |
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