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首页> 外文期刊>Advanced Functional Materials >Photothermally Sensitive Poly(N-isopropylacrylamide)/ Craphene Oxide Nanocomposite Hydrogels as Remote Light-Controlled Liquid Microvalves
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Photothermally Sensitive Poly(N-isopropylacrylamide)/ Craphene Oxide Nanocomposite Hydrogels as Remote Light-Controlled Liquid Microvalves

机译：光热敏聚（N-异丙基丙烯酰胺）/氧化苯甲醚纳米复合水凝胶，作为远程​​光控液体微阀

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摘要

A photothermally sensitive poly(N-isopropylacrylamide)/graphene oxide (PNIPAM/CO) nanocomposite hydrogel can be synthesized by in situ Υ-irradiation-assisted polymerization of an aqueous solution of N-isopropy-lacrylamide monomer in the presence of graphene oxide (CO). The colors and phase-transition temperatures of the PNIPAM/CO hydrogels change with different CO doping levels. Due to the high optical absorbance of the CO, the nanocomposite hydrogel shows excellent photothermal properties, where its phase transitions can be controlled remotely by near-infrared (NIR) laser irradiation, and it is completely reversible via laser exposure or non-exposure. With a higher CO loading, the NIR-induced temperature of the nanocomposite hydrogel increases more quickly than with a lower doping level and the temperature can be tuned effectively by the irradiation time. The nanocomposite hydrogel with its excellent photothermal properties will have great applications in the biomedical field, especially as microfluidic devices; this has been demonstrated in our experiments by way of remote microvalves to control fluidic flow. Such an "easy" and "clean" synthetic procedure initiated by Υ-irradiation can be extended for the efficient synthesis of other nanocomposite materials.
机译：可以在氧化石墨烯（CO）存在下通过N-异丙基-1-丙烯酰胺单体水溶液的原位辐射辅助聚合来合成光热敏感的聚（N-异丙基丙烯酰胺）/氧化石墨烯（PNIPAM / CO）纳米复合水凝胶。 ）。 PNIPAM / CO水凝胶的颜色和相变温度随不同的CO掺杂水平而变化。由于CO的高吸光率，纳米复合水凝胶显示出优异的光热特性，可通过近红外（NIR）激光辐射远程控制其相变，并且通过激光暴露或不暴露可完全逆转。在较高的CO负载下，NIR诱导的纳米复合水凝胶的温度比较低的掺杂水平要快得多，并且可以通过辐照时间有效地调节温度。具有优异的光热性能的纳米复合水凝胶将在生物医学领域，特别是在微流体装置中具有广阔的应用前景。通过远程微阀控制流体流动已在我们的实验中证明了这一点。通过γ-辐照引发的这种“容易”和“清洁”的合成方法可以扩展用于其他纳米复合材料的有效合成。

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  • 来源
    《Advanced Functional Materials》 |2012年第19期|4017-4022|共6页
  • 作者

    Chun-Hua Zhu; Yang Lu; Jun Peng; Jia-Fu Chen; Shu-Hong Yu;

  • 作者单位

    Division of Nanomaterials and Chemistry Hefei National Laboratory for Physical Sciences at Microscale Department of Chemistry the National Synchrotron Radiation Laboratory University of Science and Technology of China Hefei, Anhui 230026, P. R. China;

    Division of Nanomaterials and Chemistry Hefei National Laboratory for Physical Sciences at Microscale Department of Chemistry the National Synchrotron Radiation Laboratory University of Science and Technology of China Hefei, Anhui 230026, P. R. China;

    Department of Chemistry University of Science and Technology of China Hefei, Anhui 230026, P. R. China;

    Division of Nanomaterials and Chemistry Hefei National Laboratory for Physical Sciences at Microscale Department of Chemistry the National Synchrotron Radiation Laboratory University of Science and Technology of China Hefei, Anhui 230026, P. R. China;

    Division of Nanomaterials and Chemistry Hefei National Laboratory for Physical Sciences at Microscale Department of Chemistry the National Synchrotron Radiation Laboratory University of Science and Technology of China Hefei, Anhui 230026, P. R. China;

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