We describe the use of biopolymers, such as sodium alginate, as an sustainable
adhesive binder for several metals and high-density polyethylene. A standard
pull test and peel test was performed with disks, made of different material
and size. Adhesive failure was investigated by varying the amount of applied
alginate solution, drying time, drying temperature, effect of surface area, and
the nature of the adherend. Alginate adhesion was remarkably strong, relatively
general, and sensitive to the presence of water. A brief comparison with
other biopolymers is also provided.
