High-performance mussel-inspired adhesives of reduced complexity.
High-performance mussel-inspired adhesives of reduced complexity.
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DOI：
10.1038/ncomms9663
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发表时间：
2015-10-19
影响因子：
16.6
通讯作者：
Waite JH
中科院分区：
文献类型：
--
作者：
Ahn BK;Das S;Linstadt R;Kaufman Y;Martinez-Rodriguez NR;Mirshafian R;Kesselman E;Talmon Y;Lipshutz BH;Israelachvili JN;Waite JH
尽管最近湿胶粘剂取得了进展和需求，但实用的水下胶粘剂在不同的应用中仍然有限或根本不存在。以贻贝为灵感的湿粘合的翻译通常需要聚合物和/或聚电解质的邻苯二酚官能化，以及需要优化和稳定的许多复杂成分和步骤的溶液处理。在这里，我们将湿式粘合剂底漆的复杂性降低到合成的低分子量儿茶型两性离子表面活性剂，这种表面活性剂具有非常强的附着力(∼50 MJ m−2)，并保持凝聚能力。这种儿茶性两性离子附着在不同的表面，并自组装成分子光滑、薄(<；4 nm)和强大的胶合层。儿茶性两性离子作为纳米制造的粘合剂具有特别的前景。这项研究通过将邻苯二酚与疏水和静电官能团结合在一个小分子中，极大地简化了生物灵感主题的湿粘着。贻贝使用坚韧的丝状物附着在岩石上，防止它们在强流中被卷走。在这里，作者借用并简化了贻贝脚的化学成分，以创建一种单组分粘合系统，该系统具有在纳米制造协议中使用的潜力。
Despite the recent progress in and demand for wet adhesives, practical underwater adhesion remains limited or non-existent for diverse applications. Translation of mussel-inspired wet adhesion typically entails catechol functionalization of polymers and/or polyelectrolytes, and solution processing of many complex components and steps that require optimization and stabilization. Here we reduced the complexity of a wet adhesive primer to synthetic low-molecular-weight catecholic zwitterionic surfactants that show very strong adhesion (∼50 mJ m−2) and retain the ability to coacervate. This catecholic zwitterion adheres to diverse surfaces and self-assembles into a molecularly smooth, thin (<4 nm) and strong glue layer. The catecholic zwitterion holds particular promise as an adhesive for nanofabrication. This study significantly simplifies bio-inspired themes for wet adhesion by combining catechol with hydrophobic and electrostatic functional groups in a small molecule. Mussels use strong filaments to adhere to rocks, preventing them from being swept away in strong currents. Here, the authors borrow and simplify chemistries from the mussel foot to create a one component adhesive system which holds potential for employment in nanofabrication protocols.