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Liquid Metal Initiator of Ring-Opening Polymerization: Self-Capsulation into Thermal/Photomoldable Powder for Multifunctional Composites.
Advanced Materials ( IF 29.4 ) Pub Date : 2020-09-21 , DOI: 10.1002/adma.202003553
Xiankai Li 1, 2 , Mingjie Li 1, 2 , Qinghui Shou 3 , Li Zhou 3 , Anle Ge 3 , Danfeng Pei 1 , Chaoxu Li 1, 2
Affiliation  

Liquid metal nanodroplets not only share similar metallic properties and nanoscale effect with solid metal nanoparticles, but also possess the additional uniqueness in nonvolatile fluidity and ambient sintering ability into continuous conductors. In most cases, liquid metal nanodroplets are encapsulated into ultrathin and fragile shells of oxides and amphiphile monolayers, and may be hindered from incorporating homogeneously into various composites through conventional processing methods. In this study, ring‐opening polymerization is found to be initiated by sonicating the liquid metal EGaIn in fluidic lactones. By this in situ polymerization, EGaIn nanodroplets are encapsulated into polylactone shells with tunable thickness, which can further be dried into a solid powder. Besides high chemical stability and dispersibility in organic solvents, the powder of the EGaIn capsules combines the exceptional properties of the EGaIn droplets (e.g., photothermal effect) and the polylactone shells (e.g., biocompatibility, biodegradability, and compatibility with different polymer matrixes), being capable of being introduced into thermoplastic composites through liquid casting and thermal‐ or photomolding for the notch‐insensitive tearing property, sintering‐induced electric conductivity, and photothermal effect. Thus, the EGaIn initiator of ring‐opening polymerization may start a pathway to produce stable andthermal/photomoldable powders of EGaIn capsules and their multifunctionalcomposites, applicable in biomedicines, soft electronics, and smart robots.

中文翻译:

开环聚合的液态金属引发剂:用于多功能复合材料的自封装成热/可光塑粉末。

液态金属纳米滴不仅具有与固态金属纳米颗粒相似的金属性能和纳米级效果,而且在不挥发流动性和环境烧结能力方面具有额外的独特性,可以连续导体。在大多数情况下,液态金属纳米液滴被封装在氧化物和两亲性单分子膜的超薄且易碎的壳中,并且可能无法通过常规加工方法将其均匀地掺入各种复合材料中。在这项研究中,发现通过对流体内酯中的液态金属EGaIn进行超声处理可以引发开环聚合反应。通过这种原位聚合,将EGaIn纳米液滴封装到厚度可调的聚内酯壳中,然后可以进一步干燥成固体粉末。除了具有高化学稳定性和在有机溶剂中的分散性外,EGaIn胶囊的粉末结合了EGaIn小滴的优异性能(例如光热效应)和聚内酯壳(例如生物相容性,生物降解性以及与不同聚合物基质的相容性),能够通过液体浇铸引入热塑性复合材料中并通过热或光模制对缺口不敏感的撕裂性能,烧结诱导的电导率和光热效应进行分析。因此,开环聚合反应的EGaIn引发剂可能会开辟一条途径,以生产适用于生物医学,软电子和智能机器人的EGaIn胶囊及其多功能复合材料的稳定且热/可光塑的粉末。(例如生物相容性,可生物降解性以及与不同聚合物基质的相容性),能够通过液体浇铸和热成型或光成型引入热塑性复合材料中,从而获得不敏感的撕裂性,烧结诱导的电导率和光热效应。因此,开环聚合反应的EGaIn引发剂可能会开辟一条途径,以生产适用于生物医学,软电子和智能机器人的EGaIn胶囊及其多功能复合材料的稳定且热/可光塑的粉末。(例如生物相容性,可生物降解性以及与不同聚合物基质的相容性),能够通过液体浇铸和热成型或光成型引入热塑性复合材料中,从而获得不敏感的撕裂性,烧结诱导的电导率和光热效应。因此,开环聚合反应的EGaIn引发剂可能会开辟一条途径,以生产适用于生物医学,软电子和智能机器人的EGaIn胶囊及其多功能复合材料的稳定且热/可光塑的粉末。和光热效应。因此,开环聚合反应的EGaIn引发剂可能会开辟一条途径,以生产适用于生物医学,软电子和智能机器人的EGaIn胶囊及其多功能复合材料的稳定且热/可光塑的粉末。和光热效应。因此,开环聚合反应的EGaIn引发剂可能会开辟一条途径,以生产适用于生物医学,软电子和智能机器人的EGaIn胶囊及其多功能复合材料的稳定且热/可光塑的粉末。
更新日期:2020-10-26
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