Jun 19, 2024 · Herein, a versatile, thermally remoldable phosphate-containing polyurethane composite foam (LPU-G) is constructed from natural lignin and expanded graphite flakes via an atmospheric pressure and scalable one-pot strategy.

Lignin foams are innovative materials obtained by the copolymerization of furanics with the spent liquor from the magnefite wood pulping process. In this study, the influence of the component amount in the formulation, as well as the effect of temperature on the …

Based on their unique properties, lignin foam materials hold great promise in many applications especially as core insulation materials for structural insulated panels (SIPs). 1. Introduction.

May 12, 2014 · The lignin-based (8.33−37.19% w/w) rigid polyurethane foam (LRPF) was prepared, and the LRPF containing 37.19% lignin was further reinforced with 1, 2, and 5 wt % of pulp fiber.

Sep 14, 2021 · A research team in the Department of Automotive Engineering at Clemson University used lignin to develop a new way of making polyurethane foam without toxic chemicals. The team at Clamson University, South Carolina, USA, calls its invention nonisocyanate polyurethane (NIPU) foam because no isocyanates are used to make it.

Oct 17, 2024 · Herein, the glycidyl methacrylate-grafted biomass lignin (GML) was used to produce a PBAT/GML composite foam with good foaming performance and mechanical properties at high lignin-filling amounts by twin-screw melting free radical polymerization and supercritical CO2 foaming process.

Technical lignins are available in huge quantities and have a large application potential, mainly in areas where their aromatic nature is of relevance. This review presents the state of the art of foamed lignin-based polymers (lignofoams) as high-performance insulation materials.

Feb 26, 2024 · The eco-forming process involved cold-pressing kraft lignin powder into a solid block, heating the solid block to form lignin foam, and finally curing and cooling the lignin foam to obtain an open-cell, rigid foam.

The challenges and possible solutions in developing lignin-based polyurethane foams are revealed, focusing on lignin's role as a renewable polyol and discussing its economic and structural limitation...

Dec 18, 2018 · All lignin-containing PU foams exhibited large elastic recovery higher than 93%. The compression strength of the PU foams increased with the lignin content while maintaining excellent resilient performance. This work gives a new approach for the application of biopolymer lignin in flexible and highly resilient polyurethane foams.