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Characterisation of silicon, zirconium and aluminium coated titanium dioxide pigments recovered from paint waste
Chalmers University of Technology, Sweden.
University of Gothenburg, Sweden.
Chalmers University of Technology, Sweden.
Chalmers University of Technology, Sweden.
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2019 (English)In: Dyes and pigments, ISSN 0143-7208, E-ISSN 1873-3743, Vol. 162, p. 145-152Article in journal (Refereed) Published
Abstract [en]

Titanium dioxide (TiO2) is the major white pigment used by the paint industry. However, the production of TiO2 is associated with a high carbon footprint. An alternative source of pigment could be created by developing a method to recover it from waste paint. In this paper two rutile pigments with different surface treatments were recovered from paint by a thermal recycling process. The pigments were analysed using powder x-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), surface area measurements (BET), laser diffraction for particle size analysis and zeta potential measurements before and after the recycling process. It was concluded that the rutile cores of both pigments were intact and there were no major changes in particle size distribution or surface charge for either pigment induced by the recycling process. However, XPS and zeta potential measurements showed that the surface coating of the pigments can be more or less degraded depending on the chemical nature, which might imply the need for further re-coating after-treatment. Another option would be to find another application for the pigment where the quality and function of the coating is of less importance.

Place, publisher, year, edition, pages
Elsevier Ltd , 2019. Vol. 162, p. 145-152
Keywords [en]
Paint, Pigment, Recycling, Titanium dioxide, Zeta potential
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-35562DOI: 10.1016/j.dyepig.2018.06.028Scopus ID: 2-s2.0-85054918545OAI: oai:DiVA.org:ri-35562DiVA, id: diva2:1261054
Note

Funding details: P37547-1, VINNOVA; Funding text: The authors acknowledge financial support from the Swedish Governmental Agency for Innovation Systems (grant number: P37547-1 ), Akzo Decorative Paints UK, and Stena Metal AB Sweden.

Available from: 2018-11-06 Created: 2018-11-06 Last updated: 2018-11-06Bibliographically approved

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CiteExportLink to record
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