Rational design of a biomimetic glue with tunable strength and ductility
Rational design of a biomimetic glue with tunable strength and ductility
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DOI：
10.1039/c6py02232d
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发表时间：
2017-03-14
影响因子：
4.6
通讯作者：
Naito, Masanobu
中科院分区：
文献类型：
--
作者：
Payra, Debabrata;Fujii, Yoshihisa;Naito, Masanobu
高强度粘合材料的开发需要关键分子成分之间的精确平衡，以实现基材界面的有效粘合和本体介质的强内聚增强。此外，强度和粘合剂延展性的协同调节对于实现多种好处是可取的，包括防止粘合剂和各种基材模量（从刚性到柔性）之间的不匹配，以及承受可能突然或定期发生的机械负载变化的能力。这项工作提出了一种仿生设计，用于在下一代粘合剂中获得可变的强度和延展性。为了确定脂肪族相互作用在宏观键合中的作用，对一系列由仿贻贝锚定分子单元和容易获得的甲基丙烯酸烷基酯组成的随机线性共聚物进行了彻底研究。对几个参数进行系统操作，包括烷基链长度/结构异构体、组成比例和配方条件，以确定获得最佳性能的最佳条件。此外，这些粘合剂对相似和不同附件中的各种基材（例如金属、玻璃和塑料）的有效粘合能力，证明了本策略的多功能性和可调节功能。
The development of high-strength bonding materials requires a precise balance between key molecular components to allow for efficient adhesion at substrate interfaces and strong cohesive reinforcement in bulk medium. Furthermore, the cooperative tuning of both strength and adhesive ductility is desirable for achieving multiple benefits, including preventing a mismatch between adhesives and a wide-range of substrate moduli (ranging from stiff to flexible), as well as the ability to withstand mechanical load variations that may be sudden or occurring at regular intervals. This work presents a biomimetic design used to access variable strength and ductility in a next-generation adhesive. A host of random linear copolymers comprised of mussel-mimetic anchoring molecular units, and readily available alkyl methacrylates, were thoroughly investigated in order to determine the role of aliphatic interactions in macroscopic bonding. Systematic manipulations of several parameters, including alkyl chain length/structural isomers, composition ratios, and formulation conditions, were carried out to identify the optimal conditions for the best performance. Furthermore, the efficient bonding ability of these adhesives for a wide-range of substrates (e.g. metals, glass, and plastics) in both similar and dissimilar attachments, serves to demonstrate the versatility and tunable functionalities of the present strategy.