74. [ACS Appl. Mater. Interfaces] Bioinspired Nucleobase-Driven Nonswellable Adhesive and Tough Gel with Excellent Underwater Adhesion
writer：Xin Liu, Qin Zhang, Lijie Duan, Guanghui Gao
keywords：gels, nucleobase, hydrophobic interaction, underwater adhesion, non-swellable
source：期刊
Issue time：2019年
ABSTRACT: Underwater adhesives have drawn much
attention in the areas of industrial and biomedical fields.
However, it is still demanding to construct a tough
underwater gel-based adhesive completely based on chemical
constitution. Herein, a nonswellable and high-strength
underwater adhesive gel is successfully fabricated through
the random copolymerization of acrylic acid, butyl acrylate,
and acrylated adenine in dimethyl sulfoxide (DMSO). The
underwater adhesive behavior is skillfully regulated through
hydrophobic aggregation induced by water?DMSO solvent
exchange. The adhesive gels exhibit an excellent adhesive
behavior for polytetrafluoroethylene, plastics, metals, rubber,
and glasses in air and various aqueous solutions, including deionized water, seawater, and acid and alkali solutions (pH = 3 and
10, respectively). Moreover, the adhesive gels exhibited robust mechanical performance and remarkable nonswellable behavior,
which were particularly important for applications of gel-based adhesives in water. It is anticipated that the strategy of
bioinspired nucleobase-assisted underwater adhesive gel via hydrophobic aggregation induced by solvent exchange would
provide an inspiration for the development of underwater adhesives.