Bioinspired Nucleobase-Driven Nonswellable Adhesive and Tough Gel with Excellent Underwater Adhesion

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.

Mussel-inspired agarose hydrogel scaffolds for skin tissue engineering

“…By comparing these samples, it could be seen that AHG without PDA had the most compact structure. It is expected that the hydrogel with a more compact structure possesses more robust mechanical properties, which is in line with previous results [ 22 , [40] , [41] , [42] ]. The presence of PDA in APG3 was further confirmed by energy-dispersive X-ray (EDX) elemental mapping ( Fig.…”

“…The swelling behavior of APG was investigated because the swelling capacity of a hydrogel is related to its biomedical applications [ [41] , [42] , [43] , [44] ]. Fig.…”

Bio‐based and Degradable Block Polyester Pressure‐Sensitive Adhesives

“…[20] For each sample, a viscoelastic window is superimposed onto the G' vs. G'' plot and the quadrant provides a qualitative assessment of application. [21] For instance, P2-3 are general purpose PSA, and P3 shows high shear, whilst P2 should be an easily removable PSA (Figure 4 B). P2 under- Figure S51 for polymer structures).…”

“…hydrogen bonding) as these have previously shown great promise in other polymeric systems. [21] A new class of bioderived and fully degradable block polyester pressure sensitive adhesives were easily prepared.…”

Seeking Answers from Tradition: Facile Preparation of Durable Adhesive Hydrogel Using Natural Quercetin

“…Adhesive hydrogels have huge potential in a variety of areas, including bio-medical care and electronic skins ( Gan et al., 2019a , 2019b ; Liao et al., 2019 ; Lei et al., 2017 ; Ma et al., 2019 ; Wang et al., 2018 ; Wirthl et al., 2017 ; Li et al., 2018 ; Xu et al., 2019 ). Different design strategies, including those based on two-layer adhesive surface-dissipative matrices ( Chen et al., 2015 ; Wu et al., 2018 ; Yang et al., 2016 ; Zhang et al., 2016 ), nucleobase tackifying ( Gao et al., 2019 ; Liu et al., 2017 , 2019a , 2019b ), and well-patterned structures ( Jin et al., 2017 ; Mredha et al., 2018 ; Zhao et al., 2017 ) have been used to develop adhesive hydrogels. Recently, mussel-inspired polydopamine-based adhesive hydrogels have been shown to have especially good performance because of their strong cohesive and adsorptive properties ( Gao et al., 2013 ; Han et al., 2017a , 2017b , 2017c ; Tang et al., 2019 ).…”