Deng Yuanxin, Zhang Qi, Feringa Ben L, Tian He, Qu Da-Hui
Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center, School of Chemistry and Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, China.
Centre for Systems Chemistry, Stratingh Institute for Chemistry and Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG, Groningen, The Netherlands.
Angew Chem Int Ed Engl. 2020 Mar 23;59(13):5278-5283. doi: 10.1002/anie.201913893. Epub 2020 Feb 25.
Supramolecular polymers that can heal themselves automatically usually exhibit weakness in mechanical toughness and stretchability. Here we exploit a toughening strategy for a dynamic dry supramolecular network by introducing ionic cluster-enhanced iron-carboxylate complexes. The resulting dry supramolecular network simultaneous exhibits tough mechanical strength, high stretchability, self-healing ability, and processability at room temperature. The excellent performance of these distinct supramolecular polymers is attributed to the hierarchical existence of four types of dynamic combinations in the high-density dry network, including dynamic covalent disulfide bonds, noncovalent H-bonds, iron-carboxylate complexes and ionic clustering interactions. The extremely facile preparation method of this self-healing polymer offers prospects for high-performance low-cost material among others for coatings and wearable devices.
能够自动自愈的超分子聚合物通常在机械韧性和拉伸性方面表现出不足。在此，我们通过引入离子簇增强的铁羧酸盐配合物，开发了一种用于动态干超分子网络的增韧策略。所得的干超分子网络同时展现出坚韧的机械强度、高拉伸性、自愈能力以及室温下的可加工性。这些独特超分子聚合物的优异性能归因于高密度干网络中四种动态组合的分层存在，包括动态共价二硫键、非共价氢键、铁羧酸盐配合物和离子簇相互作用。这种自愈聚合物极其简便的制备方法为高性能低成本材料带来了前景，尤其适用于涂料和可穿戴设备等领域。
