Researchers are increasingly looking to nature for answers to one of material science’s most persistent problems: how to create high-performance materials without the environmental cost of conventional production.
A study from McGill University directly applies this idea, using mussels and mistletoe as practical models to create a new blueprint for sustainable materials.
“Nature is able to build materials that are both strong and functional using very simple components and under mild conditions,” said Matthew Harrington, professor of chemistry at McGill and senior author of the study. “We wanted to understand those design principles and apply them to create more sustainable materials.”
Both organisms produce complex structures using relatively straightforward ingredients. Mussels, for instance, create strong underwater adhesives and fibers through dense protein droplets. Mistletoe, on the other hand, relies on rigid cellulose nanocrystals to form sticky, fibrous networks. The research combined these approaches to create hierarchical protein-cellulose materials using phase separation—a process that allows components to self-organize into structured forms.
“The materials we use in our daily lives, such as plastics, glues and composites, are having a negative impact on our environment,” Harrington said. “By mimicking nature, we can develop new greener and more sustainable avenues for making materials with excellent properties.”
The resulting materials show properties including strength, flexibility and adhesion, while being produced without high-temperature or energy-intensive processing.
The study centers on protein-cellulose scaffolds—supportive frameworks made from protein and cellulose that hold and organize other materials—that could be relevant for uses requiring lightweight, durable materials. The approach differs from conventional manufacturing methods by enabling assembly through self-organization rather than external force.
More broadly, this approach enables the engineering of “green” composites using biorenewable building blocks—such as wood-pulp-derived cellulose and recombinant proteins—that could replace environmentally harmful conventional composites.
The findings contributed to current research on biobased and bio-inspired materials, particularly where reducing energy use and simplifying production processes are priorities. The researchers noted that further development is needed to assess scalability, durability and possible integration into existing manufacturing systems.
The study was supported by the Natural Sciences and Engineering Research Council of Canada, the New Frontiers in Research Fund and the Fonds de recherche du Québec.
