Journal
CURRENT OPINION IN GREEN AND SUSTAINABLE CHEMISTRY
Volume 29, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.cogsc.2020.100436
Keywords
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Funding
- Programa de retencion de talento investigador da Universidade de Vigo para o 2018
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Hydrogels are important polymeric materials that can absorb large amounts of water and have diverse applications. Lignin-based hydrogels, with their excellent features, are seen as a step forward towards sustainability and circular economy.
Polymeric materials such as hydrogels have become necessary in our daily lives. Hydrogels are three-dimensionally cross-linked polymeric networks that can absorb large amounts of water. Thanks to their properties, hydrogels are very useful in multiple application fields. However, they have usually been obtained from petroleum-derived polymers, contributing to plastic pollution and global warming. In this context, biomass has emerged as an appropriate alternative for production of chemicals, building blocks and biopolymers. Lignin is the second most ample and disposable biopolymer in the world. This biopolymer has been underused until recent decades, but as it has been demonstrated to provide composite materials such as hydrogels with excellent features, its valorization would mean a step forward in sustainability and circular economy. Hence, this review focuses on the state of the art of hydrogels and lignin-based hydrogels, as well as on their current applications.
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