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International Journal of Biological Macromolecules

International Journal of Biological Macromolecules

IF: 7.7
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Self-healing, flame retardant and UV resistant lignin-derived epoxy wood coating with a Schiff base structure

Published:6 December 2024 DOI: 10.1016/j.ijbiomac.2024.138393 PMID: 39647746
Yuqing Liang,?Hanwen Zuo,?Mingyu Wen,?Junyou Shi,?Heejun Park

Abstract

The traditional epoxy resin not only is flammable and non-recyclable and but also heavily dependents on petroleum resources, which cannot meet the requirements of fire prevention and sustainable development. In this study, a vanillin intermediate (VAP) with dynamic imine bond (C=N) was prepared by schiff base reaction between the lignin derivative vanillin (-CHO) and the cage-like polyhedral oligomeric silsesquioxane OA-POSS(-NH2). Then, a biomass-based P-N-Si flame retardant (VAPD) was synthesized by adding 9,10-Dihydro-9-Oxa-10-Phosphaphenanthrene-10-Oxide (DOPO) into the VAP. Subsequently, the VAPD acted as curing agent of epoxy resin to prepare epoxy wood coatings (VAPDs/EP). The results showed that the VAPD-5/EP coating not only exhibited excellent self-healing property and was able to achieve 100?% healing within 35?min, but also presented distinctive UV-shielding performance. In addition, the VAPD-5/EP coating reached V-0 level of UL-94 test and got 29.3?% of limiting oxygen index (LOI). Compared with EP coating, the peak heat release rate (pHRR) decreased by 38?%. Furthermore, the VAPD-5/EP coating reached 6H level of hardness test and 4B level of adhesion test. A simple strategy for preparing self-healing flame retardant epoxy coatings with comprehensive properties for protection of wood materials was proposed in this study.

Substances (4)

Materials
Procduct Name CAS Molecular Formula Supplier Price
Vanillin 121-33-5 C8H8O3 1275 suppliers $9.00-$8210.00
Tetrahydrofuran 109-99-9 C4H8O 1105 suppliers $9.00-$17160.00
Methanol 67-56-1 CH4O 836 suppliers $9.00-$7620.00
Ethanol 64-17-5 C2H6O 806 suppliers $10.00-$17310.00

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