Epoxidized technical Kraft lignin as a resin component for high performance anticorrosive coatings

Alessio Truncali*, Tejasvi Laxminarayan, Narayanan Rajagopalan, Claus Erik Weinell, Søren Kiil, Mats Johansson

*Corresponding author for this work

Research output: Contribution to conferenceConference abstract for conferenceResearchpeer-review


With the aim of obtaining a sustainable and bio-based epoxy resin, Softwood Kraft lignin was epoxidized with epichlorohydrin using KOH as base and TBAB as catalyst to finally form a resin in the form of a fine powder. A series of formulations, with varying amounts of a commercial petroleumbased epoxy Novolac and the lignin-based epoxy resin, were applied and cured on steel panels. The structural properties of cross-linked materials were investigated by FT-IR and scanning electron microscopy (SEM). Thermal properties were analyzed by differential scanning calorimetry (DSC). Anticorrosive and adhesion properties were examined by salt spray exposure and pull-off adhesion testing, respectively. The presence of lignin-based epoxy resins improved the performance and increased the bio-based content with up to 40 wt.%.
Original languageEnglish
Publication date2023
Number of pages4
Publication statusPublished - 2023
Event18th Coatings Science International Conference - Noordwijk, Netherlands
Duration: 26 Jun 202329 Jun 2023


Conference18th Coatings Science International Conference


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