Sodium alginate crosslinked oxidized natural rubber supramolecular network with rapid self-healing at room temperature and improved mechanical properties

文献类型： 外文期刊

第一作者： Shen, Qi

作者： Shen, Qi;Wu, Mingliang;Xu, Chuanhui;Liu, Wenjian;Wang, Yueqiong;Wang, Qifang

作者机构：

关键词： A; Polymer-matrix composites (PMCs); B; Mechanical properties; D; Mechanical testing; E; Liquid composite moulding

期刊名称：COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING （ 影响因子：7.664； 五年影响因子：8.012 ）

ISSN： 1359-835X

年卷期： 2021 年 150 卷

页码：

收录情况： SCI

摘要： Rubbers with dynamic covalent bonds generally require external stimuli to trigger the healing process, e.g. high temperature, which caused inconvenience to utilize. In contrast, rubbers based on noncovalent supramolecular networks can be spontaneously repaired under mild conditions, but usually exhibit kPa level on the mechanical properties. In this paper, a rapid self-healing composite film with considerable mechanical properties was developed based on sodium alginate (SA) crosslinked oxidized natural rubber (oNR) supramolecular hydrogen bonding network. The NR latex was firstly modified to equip oxygen-containing polar groups and then blended with SA solution. After film-formation, regenerated SA formed a frame-like network and simultaneously participated in formation of a reversible supramolecular network via hydrogen bonding with rubber matrix. The composite film with 20 phr SA showed improved tensile strength of 6.5 MPa, meanwhile, its self-healing effi-ciency could reach 60% after self-healing 2 min and reach 80% after 10 min at room temperature.

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