Super-stretchable and extreme temperature-tolerant supramolecular-polymer double-network eutectogels with ultrafast in situ adhesion and flexible electrochromic behaviour,Materials Horizons

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Super-stretchable and extreme temperature-tolerant supramolecular-polymer double-network eutectogels with ultrafast in situ adhesion and flexible electrochromic behaviour
Materials Horizons ( IF 12.2 ) Pub Date : 2021-07-09 , DOI: 10.1039/d1mh00725d
Kaifang Wang ₁ , Hai Wang ₁ , Jingjing Li ₂ , Yujia Liang ₁ , Xiao-Qiao Xie ₁ , Junpeng Liu ₁ , Chaonan Gu ₁ , Yunfei Zhang ₁ , Guo Zhang ₁ , Chun-Sen Liu ₁

Affiliation

The current tough and stretchable gels with various integrated functions are mainly based on polymer hydrogels. By introducing a non-covalent supramolecular self-assembled network into a covalently cross-linked polymer network in the presence of eco-friendly and cost-effective deep eutectic solvents (DESs), we developed a new small molecule-based supramolecular-polymer double-network (SP-DN) eutectogel platform. This exciting material exhibits high stretchability and toughness (>18 000% areal strain), spontaneous self-healing ability, ultrafast (∼5 s) in situ underwater and low-temperature (−80 °C) adhesion, and unusual boiling water-resistance, as well as strong base-, strong acid- (even aqua regia), ultra-low-temperature- (liquid nitrogen, −196 °C), and high-temperature- (200 °C) resistance. All these outstanding properties strongly recommend the SP-DN eutectogels as a quasi-solid electrolyte for soft electrochromic devices, which exhibited exceptional flexibility and consistent electrochromic behaviours in harsh mechanical or temperature environments. The experimental and simulation results uncovered the assembly mechanism of the SP-DN eutectogels. Unlike polymer hydrogels, the obtained SP-DN eutectogels showed high molecular design freedom and structural versatility. The findings of this work offer a promising strategy for developing the next generation of mechanically robust and functionally integrated soft materials with high environmental adaptability.

中文翻译：

具有超快原位粘附和灵活电致变色行为的超拉伸和极端耐高温超分子聚合物双网络共晶凝胶

目前具有多种综合功能的坚韧可拉伸凝胶主要以聚合物水凝胶为基础。在生态友好且具有成本效益的深共熔溶剂 (DESs) 存在下，通过将非共价超分子自组装网络引入共价交联聚合物网络中，我们开发了一种新的基于小分子的超分子聚合物双网络（SP-DN）共晶凝胶平台。这种令人兴奋的材料具有高拉伸性和韧性（> 18 000% 面积应变）、自愈能力、超快（~5 秒）原位水下低温（-80°C）附着力，不寻常的耐沸水，以及强碱-强酸-（甚至王水），超低温-（液氮，-196°C） ) 和耐高温 (200 °C)。所有这些出色的性能都强烈推荐 SP-DN 共晶凝胶作为软电致变色器件的准固体电解质，其在恶劣的机械或温度环境中表现出卓越的柔韧性和一致的电致变色行为。实验和模拟结果揭示了 SP-DN 共晶凝胶的组装机制。与聚合物水凝胶不同，获得的 SP-DN 共晶凝胶显示出高分子设计自由度和结构多功能性。

更新日期：2021-07-20

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