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Robust Self-Healing Host-Guest Gels from Magnetocaloric Radical Polymerization

机译：磁热自由基聚合产生的强大的自愈宿主客体凝胶

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摘要

Given the increasing environmental and energy issues, materials with the ability to repair themselves following damage are highly desirable because this self-healing property can prolong the lifespan of materials and reduce replacement costs. Host-guest assemblies are a powerful approach to create supramolecular materials with versatile functions. Here, a new mode of radical polymerization is demonstrated which is achieved via magnetocaloric effect to fabricate novel host-guest supramolecular gels within 5 min. The resulting gels can repair themselves spontaneously when damaged, without the assistance of any external stimuli, and possess great mechanical strength. Moreover, the Fe_3O_4-doped supramolecular gels show accelerated self-healing (from 24 h to 3 h) under an applied magnetic field, which is attributed to the synergy between host-guest healing and a magnetocaloric effect. This strategy might open a promising avenue for accelerating the use of host-guest assemblies to rapidly build robust materials.
机译：考虑到日益增加的环境和能源问题，非常需要能够在损坏后自行修复的材料，因为这种自愈特性可以延长材料的使用寿命并降低更换成本。来宾-来宾装配是创建具有多功能功能的超分子材料的有力方法。在这里，展示了一种自由基聚合的新模式，该模式是通过磁热效应实现的，以在5分钟内制造出新型的主客体超分子凝胶。所得的凝胶在受损时可以自发修复，而无需任何外部刺激，并具有很高的机械强度。此外，Fe_3O_4掺杂的超分子凝胶在施加的磁场下显示出加速的自我修复（从24 h到3 h），这归因于宿主-客体愈合和磁热效应之间的协同作用。该策略可能会为加速使用来宾系统来快速构建坚固的材料开辟一条有希望的途径。

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  • 来源
    《Advanced Functional Materials》 |2014年第9期|1235-1242|共8页
  • 作者

    Chao Yu; Cai-Feng Wang; Su Chen;

  • 作者单位

    State Key Laboratory of Materials-Oriented Chemical Engineering and College of Chemistry and Chemical Engineering Nanjing University of Technology Nanjing, 210009, PR China;

    State Key Laboratory of Materials-Oriented Chemical Engineering and College of Chemistry and Chemical Engineering Nanjing University of Technology Nanjing, 210009, PR China;

    State Key Laboratory of Materials-Oriented Chemical Engineering and College of Chemistry and Chemical Engineering Nanjing University of Technology Nanjing, 210009, PR China;

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