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Ethylene glycol-based solar-thermal fluids dispersed with reduced graphene oxide

机译：基于乙二醇的太阳能 - 热流体分散在氧化物还原氧化物中

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摘要

Direct absorption solar collectors, which use optical nanofluids to volumetrically absorb and convert sunlight into heat, have emerged as promising devices to harvest solar-thermal energy for many heat-related applications. Nanofluids, however, generally suffer from aggregation issues and the widely investigated water-based fluids only enable solar-thermal harvesting at relatively low temperatures. Herein, we report a facile way to prepare stably dispersed reduced graphene oxide-ethylene glycol (rGO-EG) fluids for solar-thermal energy harvesting at medium temperatures. Without the use of complex surface modification process, the homogeneous dispersion of rGO-EG fluids was achieved by utilizing the favorable interaction between the oxygen-containing groups on the rGO surfaces and EG molecules. The rGO-EG fluids were prepared by reducing the GO-EG fluids that are uniformly dispersed with ethanol-wetted GO through a single step of heating. The prepared rGO-EG fluids have suitable thermophysical properties for direct solar-thermal energy harvesting, such as broadband absorption of sunlight, high specific heat capacity and low viscosity. The rGO-EG fluids have shown stable uniform dispersion up to 120 degrees C and have demonstrated consistent solar-thermal energy harvesting performance during repeated solar radiation at approximate to 110 degrees C.
机译：直接吸收太阳能收集器，使用光学纳米流体以体积吸收和转化为热量，以获得许多热相关应用的充值太阳能热能的有希望的装置。然而，纳米流体通常遭受聚集问题，并且广泛研究的水基流体仅在相对低的温度下使太阳能热收获能够实现。在此，我们报告了一种易于制备稳定分散的石墨烯氧化乙二醇（RGO）流体的容易方式，用于在介质温度下进行太阳能热能收获。在不使用复杂的表面改性过程中，通过利用RGO表面上的含氧基团与例如分子之间的含氧基团之间的有利相互作用来实现rgo-例如液体的均匀分散。通过减少均匀分散在乙醇湿润的流体通过单一加热步骤来制备rgo-例如流体。制备的rgo-例如流体具有适当的热物理性能，用于直接太阳能热能收集，例如阳光宽度的宽带吸收，高比热容和低粘度。 rgo-例如流体已经显示出稳定的均匀分散均匀的分散，高达120℃，并且在近似为110℃的重复的太阳辐射期间展示了一致的太阳能收集性能。

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  • 来源
    《RSC Advances》 |2019年第18期|共7页
  • 作者

    Shu Lei; Zhang Jingyi; Fu Benwei; Xu Jiale; Tao Peng; Song Chengyi; Shang Wen; Wu Jianbo; Deng Tao;

  • 作者单位

    Shanghai Jiao Tong Univ Sch Mat Sci &

    Engn State Key Lab Met Matrix Composites 800 Dong Chuan Rd Shanghai 200240 Peoples R China;

    Shanghai Jiao Tong Univ Sch Mat Sci &

    Engn State Key Lab Met Matrix Composites 800 Dong Chuan Rd Shanghai 200240 Peoples R China;

    Shanghai Jiao Tong Univ Sch Mat Sci &

    Engn State Key Lab Met Matrix Composites 800 Dong Chuan Rd Shanghai 200240 Peoples R China;

    Shanghai Jiao Tong Univ Sch Mat Sci &

    Engn State Key Lab Met Matrix Composites 800 Dong Chuan Rd Shanghai 200240 Peoples R China;

    Shanghai Jiao Tong Univ Sch Mat Sci &

    Engn State Key Lab Met Matrix Composites 800 Dong Chuan Rd Shanghai 200240 Peoples R China;

    Shanghai Jiao Tong Univ Sch Mat Sci &

    Engn State Key Lab Met Matrix Composites 800 Dong Chuan Rd Shanghai 200240 Peoples R China;

    Shanghai Jiao Tong Univ Sch Mat Sci &

    Engn State Key Lab Met Matrix Composites 800 Dong Chuan Rd Shanghai 200240 Peoples R China;

    Shanghai Jiao Tong Univ Sch Mat Sci &

    Engn State Key Lab Met Matrix Composites 800 Dong Chuan Rd Shanghai 200240 Peoples R China;

    Shanghai Jiao Tong Univ Sch Mat Sci &

    Engn State Key Lab Met Matrix Composites 800 Dong Chuan Rd Shanghai 200240 Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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