Extended Data Fig. 6: Appearance of the soy-mal-tan system at different stages.
From: Sustainably sourced components to generate high-strength adhesives
a, Epoxidized soy oil, malic acid, and tannic acid upon initial mixing at room temperature. b, Soy-mal-tan after 24 h reaction time at 70 °C. Here the adhesive precursor was maintained at 70 °C and viscous, but flowing. c, After the 24 h reaction at 70 °C, cooling to room temperature brought about an increase in viscosity. d, Hardening after a 24 h cure at 180 °C.
