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Green synergy: Eco-friendly, high-performance anti-corrosion and wear-resistant coatings utilizing organosolv lignin and polydimethylsiloxane
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Machine Elements.ORCID iD: 0000-0002-2500-2913
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Machine Elements.ORCID iD: 0000-0003-3919-2962
Division of Surface and Corrosion Science, Department of Chemistry, KTH Royal Institute of Technology, Stockholm, SE-100 44, Sweden.
Department of Engineering and Design, School of Engineering and Information, University of Sussex, Brighton, BN1 9RH, United Kingdom.
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2024 (English)In: Progress in organic coatings, ISSN 0300-9440, E-ISSN 1873-331X, Vol. 190, article id 108365Article in journal (Refereed) Published
Abstract [en]

Anti-corrosion and anti-wear coatings provide an effective solution. However, traditional coatings are often fossil-based and contain heavy metals, posing environmental concerns. The drive for eco-friendly coatings has led to the exploration of green materials. This study combined lignin, an abundant organic material, and polydimethylsiloxane (PDMS), a known hydrophobic material, to address the challenges. Organosolv lignin was functionalised with (3-Aminopropyl)triethoxysilane (APTES), then chemically grafted on PDMS for the final coating synthesis. The optimised coating achieved through an eco-friendly process, exhibiting enhanced hydrophobicity and barrier properties, showing excellent long-term corrosion resistance in NaCl solution. The optimal coating formulation contained 15 wt% lignin and 40 wt% PDMS, demonstrating a high corrosion resistance (measured impedance of 1010 Ω·cm2), which remains effective even after 3 weeks of immersion in 1 M NaCl solution. This coating also showed good wear resistance, with a low friction coefficient evident from nano scratch tests.

Place, publisher, year, edition, pages
Elsevier B.V. , 2024. Vol. 190, article id 108365
Keywords [en]
Anti-corrosion, Coating, Organosolv lignin, Polydimethylsiloxane, Wear resistance
National Category
Corrosion Engineering
Research subject
Machine Elements
Identifiers
URN: urn:nbn:se:ltu:diva-104879DOI: 10.1016/j.porgcoat.2024.108365Scopus ID: 2-s2.0-85187216477OAI: oai:DiVA.org:ltu-104879DiVA, id: diva2:1846978
Note

Validerad;2024;Nivå 2;2024-04-05 (marisr);

Funder: Swedish Research Council for Environment, Agricultural Sciences and Spatial Planning (Formas (2019-00904, 2022-01047, 2022-01988); Swedish Research Council (2019-04941); Engineering and Physical Sciences Research Council (EP/Y022009/1); Svenska Forskningsrådet Formas; Vetenskapsrådet;

Full text license: CC BY

Available from: 2024-03-26 Created: 2024-03-26 Last updated: 2024-04-05Bibliographically approved

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Wang, DiZhao, JunShi, Yijun

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