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A strong enhancement of corrosion and wear resistance of polyurethane-based coating by chemically grafting of organosolv lignin
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.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Chemical Engineering.ORCID iD: 0000-0003-0079-5950
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2024 (English)In: Materials Today Chemistry, E-ISSN 2468-5194, Vol. 35, article id 101833Article in journal (Refereed) Published
Abstract [en]

Corrosion and wear pose significant challenges to equipment operating in harsh environments. Thus, protective coatings are needed. Anti-corrosion and anti-wear coatings are traditionally fossil-based and often contain environmentally harmful additives. Achieving anti-corrosion and anti-wear coatings based on environmentally benign and sustainable materials is important and a significant challenge. This work focused on the development of organosolv lignin-based polyurethane (OS_lignin-PU) coatings. The coatings were synthesised and evaluated for corrosion protection using electrochemical impedance spectroscopy (EIS) and for wear properties using nanoindentation and nano scratch measurements. EIS revealed that the optimal lignin content for corrosion protection purposes in the OS_lignin-PU coatings was 15 wt%. Moreover, addition of 15 wt% lignin to the OS_lignin-PU coatings also enhanced their wear resistance, as evidenced by reduced thickness loss during tribometer tests. The nano scratch measurements revealed that OS_lignin-PU coatings containing 15 wt% lignin exhibited the lowest scratch depth and friction coefficient. It is found that the developed lignin-containing coating exhibits remarkable corrosion and wear resistance, making it a promising sustainable material in various applications for pursuing sustainable development.

Place, publisher, year, edition, pages
Elsevier, 2024. Vol. 35, article id 101833
Keywords [en]
Organosolv lignin, Polyurethane, Coating, Anti-corrosion, Wear resistance
National Category
Corrosion Engineering
Research subject
Machine Elements; Biochemical Process Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-103257DOI: 10.1016/j.mtchem.2023.101833ISI: 001135558500001Scopus ID: 2-s2.0-85179131576OAI: oai:DiVA.org:ltu-103257DiVA, id: diva2:1818087
Funder
Swedish Research Council for Environment, Agricultural Sciences and Spatial Planning, (Formas, Project No. 2022- 01047, 2021-00728, 2020-01258)
Note

Validerad;2023;Nivå 2;2023-12-08 (joosat);

Full text: CC BY License;

Funder: Engineering and Physical Sciences Research Council (EPSRC), (EP/Y022009/1);

Available from: 2023-12-08 Created: 2023-12-08 Last updated: 2024-03-07Bibliographically approved

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Wang, DiZhao, JunChristakopoulos, PaulRova, UlrikaMatsakas, LeonidasShi, Yijun

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