Wang Binmin, Qiao Chenyu, Wang Yong-Lei, Dong Xiaoxiao, Zhang Wangqing, Lu Yan, Yuan Jiayin, Zeng Hongbo, Wang Hong
Key Laboratory of Functional Polymer Materials (Ministry of Education), Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, P. R. China.
Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta T6G 1H9, Canada.
ACS Nano. 2023 Mar 28;17(6):5871-5879. doi: 10.1021/acsnano.2c12767. Epub 2023 Mar 16.
Tremendous efforts have been devoted to exploiting synthetic wet adhesives for real-life applications. However, developing low-cost, robust, and multifunctional wet adhesive materials remains a considerable challenge. Herein, a wet adhesive composed of a single-component poly(ionic liquid) (PIL) that enables fast and robust underwater adhesion is reported. The PIL adhesive film possesses excellent stretchability and flexibility, enabling its anchoring on target substrates regardless of deformation and water scouring. Surface force measurements show the PIL can achieve a maximum adhesion of 56.7 mN·m on diverse substrates (both hydrophilic and hydrophobic substrates) in aqueous media, within ∼30 s after being applied. The adhesion mechanisms of the PIL were revealed via the force measurements, and its robust wet adhesive capacity was ascribed to the synergy of different non-covalent interactions, such as of hydrogen bonding, cation-π, electrostatic, and van der Waals interactions. Surprisingly, this PIL adhesive film exhibited impressive underwater sound absorption capacity. The absorption coefficient of a 0.7 mm-thick PIL film to 4-30 kHz sound waves could be as high as 0.80-0.92. This work reports a multifunctional PIL wet adhesive that has promising applications in many areas and provides deep insights into interfacial interaction mechanisms underlying the wet adhesion capability of PILs.
人们已付出巨大努力来开发用于实际应用的合成湿粘合剂。然而，开发低成本、坚固且多功能的湿粘合剂材料仍然是一项巨大挑战。在此，报道了一种由单组分聚离子液体（PIL）组成的湿粘合剂，它能实现快速且牢固的水下粘附。该PIL粘合剂膜具有出色的拉伸性和柔韧性，使其能够锚定在目标基材上，而不受变形和水冲刷的影响。表面力测量表明，在水性介质中，PIL在施加后约30秒内，可在各种基材（包括亲水性和疏水性基材）上实现最大粘附力56.7 mN·m。通过力测量揭示了PIL的粘附机制，其强大的湿粘附能力归因于不同非共价相互作用的协同作用，如氢键、阳离子-π、静电和范德华相互作用。令人惊讶的是，这种PIL粘合剂膜表现出令人印象深刻的水下吸声能力。厚度为0.7毫米的PIL膜对4 - 30 kHz声波的吸收系数可高达0.80 - 0.92。这项工作报道了一种多功能PIL湿粘合剂，在许多领域具有广阔应用前景，并为PIL湿粘附能力背后的界面相互作用机制提供了深入见解。
