Bioenergy Technologies Office
May 14, 2019
Scientists Create Material with a Mussel-Like Stickiness
Researchers developed a new material using epoxy mixed with a form of lignin naturally rich in hydroxyl groups that can self-heal if sliced and elongate up to 2,000%. Photo courtesy of ORNL.
Scientists at Oak Ridge National Laboratory (ORNL) have developed a new, stretchy, plant-derived material that outperforms the adhesiveness of the natural chemical that gives mussels the ability to stick to rocks and ships. This bio-based material—composed of lignin (the substance that gives plants sturdiness) and epoxy—can self-heal and elongate up to 2,000%. To achieve these results, researchers developed a unique method to extract a specific form of lignin. The resulting molecular structure creates a super-sticky, highly elastic material that can heal quickly, where broken, through hydrogen bonding.
This extracted lignin shows promise for a range of industrial applications including coatings, glues, and hydrogels. The results, published in ACS Macro Letters, demonstrate new potential for a small, but high-value portion of the lignin waste stream from biorefineries and the pulp and paper industry.
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