RT Journal Article
T1 Toward UV-Triggered Curing of Solvent-Free Polyurethane Adhesives Based on Castor Oil
A1 Borrero López, Antonio María
A1 Guzmán Ríos, David Benjamín
A1 González-Delgado, José Antonio
A1 Fernández Arteaga, Jesús
A1 Valencia Barragán, Concepción
A1 Pischel, Uwe
A1 Franco Gómez, José María
K1 Chemical Engineering
AB An o-nitrobenzyl-protected precursor was used as aphototrigger for the release of the diamine cadaverine in polyurethaneadhesives based on castor oil as a renewable source of polyoland organic diisocyanates. This resulted in formulations with suitablycontrolled curing by photoactivation. This material shows fastercuring when UV light is applied as compared to curing in theabsence of irradiation, which was in situ monitored by rheologicalmeasurements. In addition, the adhesion performance is superior,reaching lap shear strength values of up to 4600 kPa, which isunprecedented for bio-based adhesives. On one hand, the in-depthchemical characterization with FTIR spectroscopy revealed that theslow release of cadaverine yields a well-balanced urethane/ureacomposition with direct impact on adhesion properties. Thephotocured bioadhesive was shown to bond a variety of surfaces, such as polyethylene or even wood. On the other hand, thedirect one-time addition of cadaverine yields a material with approximately the same viscoelastic properties, which were achievedalmost immediately as a consequence of the favored fast formation of urea bonds in detriment of urethanes, however, lackingadhesion properties.
PB American Chemical Society
SN 2168-0485 (electrónico)
YR 2021
FD 2021-08-10
LK http://hdl.handle.net/10272/20266
UL http://hdl.handle.net/10272/20266
LA eng
NO Borrero-López, A. M., Guzmán, D. B., González-Delgado, J. A., Arteaga, J. F., Valencia, C., Pischel, U., & Franco, J. M. (2021). Toward UV-Triggered Curing of Solvent-Free Polyurethane Adhesives Based on Castor Oil. In ACS Sustainable Chemistry & Engineering (Vol. 9, Issue 33, pp. 11032–11040). American Chemical Society (ACS). https://doi.org/10.1021/acssuschemeng.1c02461
NO We are grateful for financial support through the project UHU-1252599, financed by the University of Huelva, in the frame of the European Regional Development Fund (ERDF)-Junta de Andalucía 2014−2020 Operational Programme. A.M.B.-L. acknowledges the Spanish Ministerio de Educación, Cultura y Deporte for the award of a doctoral fellowship (FPU16/03697).
NO Funding for open access charge: Universidad de Huelva / CBUAUniversity of Huelva, in the frame ofthe European Regional Development Fund (ERDF)-Junta deAndalucía 2014−2020 Operational Programme.Ministerio de Educación, Culturay Deporte (FPU16/03697)Funding for open acess charge: Universidad de Huelva/CBUA
DS Repositorio Institucional de la Universidad de Huelva
RD 1 jun 2026