Photocurable Adhesive Composed of Modified Castor Oil and Enhanced by Valorized Glycerol from Waste Cooking Oil

Photocurable Adhesive Composed of Modified Castor Oil and Enhanced by Valorized Glycerol from Waste Cooking Oil

Článek WoS

This article describes the production of a photocurable adhesive from renewable sources, i.e., castor oil and waste cooking oil. An innovative castor oil ethanolamide methacrylate (Oil-EA-Met) was synthesized to form the primary binder precursor. The waste-oil-resourced glycerol derivatives, modified to mono-, di-, and trimethacrylate derivatives (MGLY, DGLY, and TGLY), represent functional additives. All products were cross-analyzed using 1H NMR, ESI-MS, FTIR, and GC-FID. Oil-EA-Met represented 75% of the formulated precursor systems, while the functional additive (MGLY, DGLY, TGLY, and a commercially available 2-hydroxyethyl methacrylate (HEMA)) represented 25% of the curable precursor. MGLY had the best impact on the adhesion performance. This additive exhibited the highest polymerization reactivity (E a = 68.2 kJ/mol), a complete miscibility with water, the highest thermal resistivity, a thermomechanical profile, a flexural character, and the highest ISO 2049 adhesion levels on wood-glass substrates (reaching level 5 (the highest)) and wood-PMMA substrates (level 3). The adhesive containing MGLY reached a similar wood-glass adhesion shear strength of 1400 kPa as the system with HEMA and surpassed the HEMA system for the wood-PMMA system (the MGLY system reached 800 MPa; the HEMA system achieved 530 MPa).

This article describes the production of a photocurable adhesive from renewable sources, i.e., castor oil and waste cooking oil. An innovative castor oil ethanolamide methacrylate (Oil-EA-Met) was synthesized to form the primary binder precursor. The waste-oil-resourced glycerol derivatives, modified to mono-, di-, and trimethacrylate derivatives (MGLY, DGLY, and TGLY), represent functional additives. All products were cross-analyzed using 1H NMR, ESI-MS, FTIR, and GC-FID. Oil-EA-Met represented 75% of the formulated precursor systems, while the functional additive (MGLY, DGLY, TGLY, and a commercially available 2-hydroxyethyl methacrylate (HEMA)) represented 25% of the curable precursor. MGLY had the best impact on the adhesion performance. This additive exhibited the highest polymerization reactivity (E a = 68.2 kJ/mol), a complete miscibility with water, the highest thermal resistivity, a thermomechanical profile, a flexural character, and the highest ISO 2049 adhesion levels on wood-glass substrates (reaching level 5 (the highest)) and wood-PMMA substrates (level 3). The adhesive containing MGLY reached a similar wood-glass adhesion shear strength of 1400 kPa as the system with HEMA and surpassed the HEMA system for the wood-PMMA system (the MGLY system reached 800 MPa; the HEMA system achieved 530 MPa).

Castor oil, Aminolysis, Waste oil, Transesterification, Glycerol, Esterification, Adhesives

Castor oil, Aminolysis, Waste oil, Transesterification, Glycerol, Esterification, Adhesives

JAŠEK, V.; BARTOŠ, O.; PROKEŠ, J.; KAMENÍKOVÁ, E.; PŘIKRYL, R.; FIGALLA, S.

08.12.2025

ACS Engineering Au

5

6

Spojené státy americké

17

https://pubs.acs.org/doi/10.1021/acsengineeringau.5c00084