炭黑骨胶纳米流体的制备及其光热转换性能

Preparation and Photothermal Conversion Properties of Carbon Black-Bone Glue Nanofuids

以纳米流体为工作介质的直接光热转换是太阳能利用的重要部分,纳米流体的制备受到众多研究者的关注。炭黑具有化学性质稳定,光谱吸收宽等特点,作为纳米添加颗粒在太阳光吸收与光热转换领域应用广泛。然而,炭黑极易团聚,影响了其在纳米流体中的推广应用。利用环境友好型的骨胶与炭黑通过球磨法制备炭黑骨胶纳米复合材料,提高炭黑在去离子水基液中的分散稳定性。通过扫描电镜(SEM),紫外-可见-近红外分光光度计(UV-vis-NIR)和自组装的光热转换装置等对样品性能进行表征。结果表明,炭黑骨胶纳米流体解决了炭黑易团聚的问题,具备较好的分散稳定性和光热转换性能,质量分数0.006%的炭黑骨胶纳米流体光热转换效率可达94%,较去离子水基液提高了20%。

Direct photothermal conversion of nanofuids as working medium is one of the important parts of solar energy utilization,so the preparation of nanofuids has attracted the attention of many researchers.Carbon black has the characteristics of chemical stability,cheap and wide spectrum absorption,and so on.It is widely used in the feld of solar absorption and photothermal conversion as a nanoparticle additive particle.But carbon black is very easy to agglomerate,which affects its application in nanofuids.Carbon black bone glue nanocomposites were prepared by ball milling with environment-friendly bone glue and carbon black,which improved the dispersion stability of carbon black in deionized water-based solution.The properties of the sample were characterized by scanning electron microscope(SEM),UV-visible-near-infrared spectrophotometer(UV-vis-NIR)and self-assembled photothermal conversion device.The results show that the carbon black bone glue nanofuids solve the problem that carbon black is easy to aggregate,and have good dispersion stability and photothermal conversion performance.The photothermal conversion effciency of carbon black bone glue nanofuids with mass fraction of 0.006%can reach 94%,which is 20%higher than that of deionized water base solution.