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首页> 外文期刊>Advanced Functional Materials >Liquid Metal Droplets Wrapped with Polysaccharide Microgel as Biocompatible Aqueous Ink for Flexible Conductive Devices
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Liquid Metal Droplets Wrapped with Polysaccharide Microgel as Biocompatible Aqueous Ink for Flexible Conductive Devices

机译：用多糖微凝胶包裹的液态金属液滴作为柔性导电设备的生物相容性水性油墨

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摘要

Nanometerization of liquid metal in organic systems can facilitate deposition of liquid metals onto substrates and then recover its conductivity through sintering. Although having broader potential applications, producing stable aqueous inks of liquid metals keeps challenging because of rapid oxidation of liquid metal when exposing to water and oxygen. Here, a biocompatible aqueous ink is produced by encapsulating alloy nanodroplets of gallium and indium (EGaIn) into microgels of marine polysaccharides. During sonicating bulk EGaIn in aqueous alginate solution, alginate not only facilitates the downsizing process via coordination of their carboxyl groups with Ga ions but also forms microgel shells around EGaIn droplets. Due to the deceasing oxygen-permeability of microgel shells, aqueous ink of EGaIn nanodroplets can maintain colloidal and chemical stability for a period of 7 d. Crosslinked alginate-gel with tunable thickness can retard the generation and release of toxic cations, thereby affording high biocompatibility. The soft alginate shells also enable to recover electric conductivity of EGaIn layers by mechanical sintering for applications in microcircuits, electric-thermal actuators, and wearable sensors, offering huge potential for electronic tattoos, artificial limbs, electric skins, etc.
机译：有机系统中液态金属的纳米化可以促进液态金属沉积到基板上，然后通过烧结恢复其导电性。尽管具有更广泛的潜在应用，但是由于液态金属在暴露于水和氧气时会迅速氧化，因此生产稳定的液态金属水性墨水仍然具有挑战性。在此，通过将镓和铟的合金纳米液滴（EGaIn）封装到海洋多糖的微凝胶中来生产生物相容性水性墨水。在对藻酸盐水溶液中的大量EGaIn进行超声处理期间，藻酸盐不仅通过其羧基与Ga离子的配位促进了尺寸缩小过程，而且还在EGaIn小滴周围形成了微凝胶壳。由于微凝胶壳的透氧性下降，EGaIn纳米液滴的水性油墨可以保持胶体和化学稳定性达> 7 d。具有可调节厚度的交联藻酸盐凝胶可延迟有毒阳离子的产生和释放，从而提供高生物相容性。柔软的藻酸盐外壳还可以通过机械烧结来恢复EGaIn层的电导率，以用于微电路，电热致动器和可穿戴传感器，为电子纹身，人造肢体，电动皮肤等提供巨大潜力。

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  • 来源
    《Advanced Functional Materials》 |2018年第39期|1804197.1-1804197.8|共8页
  • 作者

    Li Xiankai; Li Mingjie; Zong Lu; Wu Xiaochen; You Jun; Du Peikang; Li Chaoxu;

  • 作者单位

    Chinese Acad Sci, Qingdao Inst Bioenergy & Bioproc Technol, Grp Biomimet Smart Mat, Songling Rd 189, Qingdao 266101, Peoples R China;

    Chinese Acad Sci, Qingdao Inst Bioenergy & Bioproc Technol, Grp Biomimet Smart Mat, Songling Rd 189, Qingdao 266101, Peoples R China;

    Chinese Acad Sci, Qingdao Inst Bioenergy & Bioproc Technol, Grp Biomimet Smart Mat, Songling Rd 189, Qingdao 266101, Peoples R China;

    Chinese Acad Sci, Qingdao Inst Bioenergy & Bioproc Technol, Grp Biomimet Smart Mat, Songling Rd 189, Qingdao 266101, Peoples R China;

    Chinese Acad Sci, Qingdao Inst Bioenergy & Bioproc Technol, Grp Biomimet Smart Mat, Songling Rd 189, Qingdao 266101, Peoples R China;

    Nanjing Univ Posts & Telecommun, 9 Wenyuan Rd, Nanjing 210023, Jiangsu, Peoples R China;

    Chinese Acad Sci, Qingdao Inst Bioenergy & Bioproc Technol, Grp Biomimet Smart Mat, Songling Rd 189, Qingdao 266101, Peoples R China;

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  • 正文语种 eng
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  • 关键词

    conductive nanoinks; flexible electronics; liquid metals; marine alginate; microgels;

    机译：导电纳米墨水;柔性电子;液态金属;海藻酸盐;微凝胶;

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