凝聚
胶粘剂
材料科学
粘附
水下
生物粘附
聚合物
纳米技术
自愈水凝胶
化学工程
复合材料
高分子化学
图层(电子)
海洋学
地质学
工程类
作者
Manhua Zhou,Qiong Luo,Jichang Li,Gang Yu,Junbo Peng,Yong Cao,Jianfeng Wang,Wanjie Wang,Yanyu Yang
标识
DOI:10.1016/j.cej.2023.142436
摘要
Achieving strong and long-lasting underwater adhesion remains a great challenge because both interfacial hydration film and continuous water erosion significantly impede the interfacial bonding. Herein, a sequential self-assembly and self-coacervation strategy was proposed to actuate water-triggered robust underwater bonding to both abiotic materials and biological tissues. With the embedded polyhedral oligomeric silsesquioxane (POSS) cages serving as rigid and hydrophobic segments, the amphiphilic hybrid hyperbranched polymer featured conformation variation capacity under the synergy of sharply decreased solubility and cluster effect of polyfunctional groups on POSS cages. The polymer firstly altered conformation into an assembled adhesive with extremely rigid hydrophobic POSS clusters for significantly enhancing the cohesion. Once touching water, the prompt aggregation of POSS clusters and followed self-coacervation behavior of the adhesive boosted interfacial water expulsion and catechol groups exposure, resulting in spontaneous solidification and universally eminent underwater adhesion between the adhesive and diverse substrates. The adhesive not only exhibited outstanding adhesive performances in water, seawater, PBS, acid, and alkali solutions, but also possessed excellent anti-erosion capacity to demonstrate long-lasting underwater adhesion for months. Prominently, a smart bioadhesive was developed via introducing tissue adhesive group and sensitive disulfide bond, which revealed strong adhesion to wet tissues and on-demand debonding capacity. The water-triggered robust and long-lasting underwater bonding mediated by sequential self-assembly and self-coacervation opens up a new horizon in the design and progress of smart and high-performance underwater adhesives.
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