US: Researchers at Washington State University (WSU) have developed an alternative to extruded polystyrene foam that uses nanocrystals of cellulose instead of petroleum based products. The team, led by Amir Ameli, assistant professor in the School of Mechanical and Materials Engineering, and Xiao Zhang, associate professor in the Gene and Linda School of Chemical Engineering and Bioengineering, have also developed a manufacturing process to make the foam using water as a solvent.
The project is working on developing an environmentally friendly replacement for extruded polystyrene foam. The WSU team created a material that is made of about 75% cellulose nanocrystals from wood pulp. They added polyvinyl alcohol, another polymer that bonds with the nanocellulose crystals and makes the resultant foams more elastic.
“We have used an easy method to make high-performance, composite foams based on nanocrystalline cellulose with an excellent combination of thermal insulation capability and mechanical properties,” said Ameli.
The researchers are now developing formulations for stronger and more durable materials for practical applications. They are interested in incorporating low‑cost feedstocks to make a commercially viable product and considering how to move from laboratory to a real-world manufacturing scale.
