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A strong enhancement of corrosion and wear resistance of polyurethane-based coating by chemically grafting of organosolv lignin
Division of Machine Elements, Department of Engineering Sciences and Mathematics, Luleå University of Technology, Luleå, SE-971 87, Sweden.
Division of Machine Elements, Department of Engineering Sciences and Mathematics, Luleå University of Technology, Luleå, SE-971 87, Sweden.
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Chemistry, Surface and Corrosion Science.ORCID iD: 0000-0002-3207-1570
Division of Chemical Engineering, Department of Civil, Environmental and Natural Resources Engineering, Luleå University of Technology, Luleå, SE-971 87, Sweden.
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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 BV , 2024. Vol. 35, article id 101833
Keywords [en]
Anti-corrosion, Coating, Organosolv lignin, Polyurethane, Wear resistance
National Category
Surface- and Corrosion Engineering
Identifiers
URN: urn:nbn:se:kth:diva-341607DOI: 10.1016/j.mtchem.2023.101833Scopus ID: 2-s2.0-85179131576OAI: oai:DiVA.org:kth-341607DiVA, id: diva2:1822614
Note

QC 20231227

Available from: 2023-12-27 Created: 2023-12-27 Last updated: 2025-02-09Bibliographically approved

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Claesson, Per M.Pan, Jinshan

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