New Eco Adhesive Made From Plants: Just Add Water

Posted on 3/13/2020 6:47:09 AM By ASC

A recent study by Finland’s Aalto University has shined the light on a new green approach to adhesives based on recent research into a totally bio-based and plant-sourced adhesive. The new concept revolves entirely around cellulose nanocrystals (CNCs) which require only water to turn them into a high strength adhesive with a number of unusual attributes.

The research, carried out by a team of scientists from universities in several different countries, suggests that when these cellulose nanocrystals are suspended in water, they form structured layers which self-set into a powerful adhesive as a result of natural evaporation induced self-assembly.

Researchers report that only a few drops of the CNC adhesive are needed to achieve a strong bond, and because of its cellulose structure the bulk of that strength can be applied to one directional plane, with a lower strength being applied to the other. This allowed for the adhesion to be as much as 70 times stronger on the horizontal plane than on the perpendicular. It therefore remained easy to separate the bonded materials with relatively little force (8N) along the perpendicular, while the horizontal remained capable of supporting up to 20kg while creating a bond that would remain intact despite forces of over 200 N.

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