A Review on the Lignin Biopolymer and Its Integration in the Elaboration of Sustainable Materials
Open Access
- 2 March 2021
- journal article
- review article
- Published by MDPI AG in Sustainability
- Vol. 13 (5), 2697
- https://doi.org/10.3390/su13052697
Abstract
Lignin is one of the wood and plant cell wall components that is available in large quantities in nature. Its polyphenolic chemical structure has been of interest for valorization and industrial application studies. Lignin can be obtained from wood by various delignification chemical processes, which give it a structure and specific properties that will depend on the plant species. Due to the versatility and chemical diversity of lignin, the chemical industry has focused on its use as a viable alternative of renewable raw material for the synthesis of new and sustainable biomaterials. However, its structure is complex and difficult to characterize, presenting some obstacles to be integrated into mixtures for the development of polymers, fibers, and other materials. The objective of this review is to present a background of the structure, biosynthesis, and the main mechanisms of lignin recovery from chemical processes (sulfite and kraft) and sulfur-free processes (organosolv) and describe the different forms of integration of this biopolymer in the synthesis of sustainable materials. Among these applications are phenolic adhesive resins, formaldehyde-free resins, epoxy resins, polyurethane foams, carbon fibers, hydrogels, and 3D printed composites.Keywords
Funding Information
- Comisión Nacional de Investigación Científica y Tecnológica (21130772, 21202180)
- Corporación de Fomento de la Producción (13CEI2-21839)
- VRID-UdeC/Postdoctoral (219.141.023-P, 3200114)
This publication has 77 references indexed in Scilit:
- Effect of replacing polyol by organosolv and kraft lignin on the property and structure of rigid polyurethane foamBiotechnology for Biofuels, 2013
- The Genetics of Lignin Biosynthesis: Connecting Genotype to PhenotypeAnnual Review of Genetics, 2010
- Lignin Composition and Structure in Young versus AdultEucalyptus globulusPlantsPlant Physiology, 2010
- Pretreatment technologies for an efficient bioethanol production process based on enzymatic hydrolysis: A reviewBioresource Technology, 2010
- Thermosetting (bio)materials derived from renewable resources: A critical reviewProgress in Polymer Science, 2010
- The Catalytic Valorization of Lignin for the Production of Renewable ChemicalsChemical Reviews, 2010
- Human exposure to bisphenol A (BPA)Reproductive Toxicology, 2007
- Preparation and Characterization of Demethylated Lignin-Polyethylenimine AdhesivesThe Journal of Adhesion, 2006
- Biorefining of softwoods using ethanol organosolv pulping: Preliminary evaluation of process streams for manufacture of fuel-grade ethanol and co-productsBiotechnology & Bioengineering, 2005
- Formaldehyde‐Free Wood Adhesives from Decayed WoodMacromolecular Rapid Communications, 2005