Syntheses, Properties and Applications of Organic Dyes and Pigments Coatings—2nd Edition

A special issue of Coatings (ISSN 2079-6412). This special issue belongs to the section "Functional Polymer Coatings and Films".

Deadline for manuscript submissions: 16 May 2025 | Viewed by 2292

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Guest Editor
1. Department of Evaluation and Conservation of Cultural Heritage, ICECHIM, 060021 Bucharest, Romania 2. Faculty of Materials Engineering, Valahia University of Targoviste, 130004 Targoviste, Romania
Interests: cultural heritage; ceramics; glasses; mortars; rock weathering; conservation; nanomaterials
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Special Issue Information

Dear Colleagues,

Today, our world is surrounded by natural and synthetic colored molecules, termed colorants, characterized by mobile electrons (pi-electrons) that can be excited by visible light and then emit radiation in the visible range of the spectrum (400–700 nm).

The recent literature is full of publications on the synthesis and characterization of some dyes (porphyrins, phthalocyanines, and so on) and related pigments. The aim of this Special Issue is to present research papers that renew the recent discoveries in the field of these macrocyclic dyes and pigments. Organic and inorganic dyes will be presented for visible and near infrared regions, and their use in medical applications, such as cancer phototherapy and biomedical analysis, capture and storage of solar energy, optical images and color laser marking for security documents, will also be exemplified. Last but not least, some of the materials for cultural heritage conservation will be addressed. Although this problem cannot be entirely solved in the field of application, the collection of articles in this Special Issue will be helpful for researchers, academics and industrial agents. Contributions of original articles and review articles are encouraged, covering different areas of application.

Prof. Dr. Rodica-Mariana Ion
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Coatings is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • functional dyes and pigments
  • medical dyes
  • biomedical applications
  • photodynamic therapy
  • natural dyes
  • dyes for solar cells
  • hair dyes
  • textile dyes
  • inorganic colorants
  • organic semiconductors
  • solar cells
  • nonlinear optical dyes
  • laser dyes
  • pigments and coatings for cultural heritage
  • porphyrins
  • phthalocyanines
  • organic dyes
  • coatings
  • photochemistry

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Published Papers (1 paper)

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Research

28 pages, 9805 KiB  
Article
Exploiting Turmeric’s Coloring Capability to Develop a Functional Pigment for Wood Paints: Sustainable Coloring Process of Polyamide 11 Powders and Their Strengthening Performance
by Massimo Calovi and Stefano Rossi
Coatings 2024, 14(7), 858; https://doi.org/10.3390/coatings14070858 - 9 Jul 2024
Cited by 3 | Viewed by 1882
Abstract
Currently, the wood coatings industry is focusing on creating unique, vibrant finishes using new functional pigments. Simultaneously, there is a growing adoption of eco-friendly bio-based materials, reflecting trends in other sectors and supporting the circular economy. Thus, the aim of this study is [...] Read more.
Currently, the wood coatings industry is focusing on creating unique, vibrant finishes using new functional pigments. Simultaneously, there is a growing adoption of eco-friendly bio-based materials, reflecting trends in other sectors and supporting the circular economy. Thus, the aim of this study is to unveil a straightforward, cost-effective, and notably sustainable process for exploiting the coloring potential of turmeric powder and coloring polyamide 11-based fillers, employed as multifunctional pigments for wood coatings. Through the incorporation of this additive into a wood paint, the study demonstrates its dual effect of enhancing the aesthetics of the final composite layer while leveraging the beneficial protective properties inherent to polyamide 11. The impact of these additives on sample aesthetics is assessed through optical observations, as well as measurements of color, gloss, and surface roughness. The strengthening contribution of the functional pigment is evaluated using the Taber abrasion resistance test, static friction coefficient measurements, and Buchholz surface hardness test. Finally, the aesthetic consistency of the bio-based filler and the coloring efficiency of the sustainable process are tested by subjecting the samples to aggressive conditions, including the UV-B chamber exposure test, cold liquids resistance tests, and water uptake test. Ultimately, the study illustrates how this functional bio-based pigment not only provides sufficient protection but also meets current eco-requirements, thereby contributing to the sustainability of the wood coatings industry. Full article
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