High Internal Phase Emulsion Template Synthesis of Bio-Based UV-Curable Porous Adhesives with Tunable Architecture and Strong Adhesion

In this paper, we developed a green, scalable fabrication approach for porous adhesives, utilizing a high internal phase emulsion (HIPE) templating method, in which acrylated epoxidized soybean oil (AESO) serves as a renewable matrix combined with a ternary monomer system. By adjusting the dispersed phase ratio and incorporating biobased cross-linkers, the pore architecture, mechanical properties, and interfacial adhesion of the adhesive can be precisely tailored. The optimized adhesive exhibits a shear strength of up to 1.18 MPa on glass substrates, outperforming many conventional adhesives. The material also demonstrates notable multifunctionality, including pressure-sensitive adhesion, effective thermal insulation, and excellent solvent resistance. These attributes, coupled with low energy consumption during room-temperature UV curing, make the developed porous adhesive a promising candidate for sustainable applications in flexible electronics, green packaging, and thermal management systems.