- Review
Lignin as a Renewable Building Block for Sustainable Polyurethanes
- Fernanda Rosa Vieira,
- Sandra Magina,
- Dmitry V. Evtuguin and
- Ana Barros-Timmons
Currently, the pulp and paper industry generates around 50–70 million tons of lignin annually, which is mainly burned for energy recovery. Lignin, being a natural aromatic polymer rich in functional hydroxyl groups, has been drawing the interes...