A Repeatable Self-Adhesive Liquid-Free Double-Network Ionic Conductor with Tunable Multifunctionality
A Repeatable Self-Adhesive Liquid-Free Double-Network Ionic Conductor with Tunable Multifunctionality
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DOI：
10.1021/acsami.2c00950
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发表时间：
2022-05-18
影响因子：
9.5
通讯作者：
He, Minghui
中科院分区：
文献类型：
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作者：
Hua, Ziyu;Chen, Guangxue;He, Minghui
无液体离子导体（LFIC）在柔性电子器件中具有有希望的应用，因为大多数离子导体目前遭受离子液体泄漏或水蒸发问题。然而，如何在不同的基底上，特别是在生物软组织上实现长时间的反复自粘附，一直是LFICs面临的一个巨大挑战。基于双网络设计理念，我们首先制备了一系列可重复性自粘无液双网络离子导体（SALFDNIC），由可拉伸的第一聚（AA-ChCl）型超分子深共晶聚合物网络和刚性的第二聚多巴胺（PDA）网络组成，其可以通过防止多巴胺的过氧化而在离子导体中保持足够的动态氢键和儿茶酚基团，从而平衡了无液体离子导体中粘附和内聚之间的矛盾。因此，SALFDNIC可以与多个基板瞬间形成各种界面相互作用力（粘附强度高达757 N/m），并牢固地粘附在各种基板上，持续20次粘附-再粘附循环，粘附强度降低小于15%。此外，SALFDNIC还具有其他综合性能，例如最佳的自修复性能（自修复效率为90%）、良好的拉伸性（断裂应变为1200%）和有希望的导电性（2.31 × 10（-2）S m（-1））。因此，我们相信SALFDNIC的卓越性能对于提高器件集成度和进一步开发柔性电子产品非常重要。
Liquid-free ionic conductors (LFICs) have promising applications in flexible electronics because most ionic conductors currently suffer from ionic liquid leakage or water evaporation issues. However, it has been a formidable challenge for LFICs to achieve long-term repeated self-adhesion on different substrates, especially on soft biological tissues. Based on the double-network design concept, we first fabricate a series of repeatable self-adhesive liquid-free double-network ionic conductors (SALFDNICs), consisting of stretchable first poly(AA-ChCl)-type supramolecular deep eutectic polymer networks and stiff second polydopamine (PDA) networks, which can maintain sufficient dynamic hydrogen bonds and catechol groups in the ionic conductors by preventing the overoxidation of dopamine, thus balancing the contradiction between adhesion and cohesion in liquid-free ionic conductors. Therefore, SALFDNICs can instantly form various interface interaction forces with multiple substrates (adhesion strength up to 757 N/m) and firmly adhere to various substrates for 20 detachment-reattachment cycles with a reduction in adhesion strength of less than 15%. Furthermore, SALFDNICs also have other comprehensive properties, such as optimum self-healing properties (self-healing efficiency of 90%), good stretchability (strain at break of 1200%), and promising conductivity (2.31 x 10(-2) S m(-1)). Therefore, we believe that the extraordinary performance of SALFDNICs is important for improving device integration and the further development of flexible electronics.