Bio-based Epoxy Resins from Biorefinery By-products

Pablo Ortiz, Martijn Wiekamp, Richard Vendamme, Walter Eevers

Abstract


In the transition from petrol to bio-based chemicals, the total utilization of the components from biomass during the biorefinery process can be regarded as the key to its success. Currently, the lignin obtained from the biomass during the pulping of wood is burned; however, this component has the potential to be an alternative to petroleum for producing aromatic feedstocks. Additionally, glycerol is a by-product of biodiesel production. In this work, epoxy resins were synthesized from these two components in an environmentally compatible process using water as the reaction medium (as opposed to organic solvents). Base-catalyzed depolymerized lignin, the only depolymerized lignin available at a multi-kilogram-scale, was chosen as the lignin source. This depolymerized lignin acts as the curing agent for glycerol, which results in entirely bio-based resins. Depolymerized lignin imparts rigidity to the resins, and the glass transition temperature (Tg) increased as the lignin content of the resin increased. Thermogravimetric analysis (TGA) data showed that the resins had a relatively high thermal stability with the onset of thermal degradation starting at 281 °C.

Keywords


Depolymerized lignin; Epoxy resin; Bio-based epoxy; Glycerol; Biorefinery By-products

Full Text:

PDF


Welcome to BioResources! This online, peer-reviewed journal is devoted to the science and engineering of biomaterials and chemicals from lignocellulosic sources for new end uses and new capabilities. The editors of BioResources would be very happy to assist you during the process of submitting or reviewing articles. Please note that logging in is required in order to submit or review articles. Martin A. Hubbe, (919) 513-3022, hubbe@ncsu.edu; Lucian A. Lucia, (919) 515-7707, lucia-bioresources@ncsu.edu URLs: bioresourcesjournal.com; http://ncsu.edu/bioresources ISSN: 1930-2126