一种可直接使用的磁性光热纳米流体  

An Available Magnetic Photothermal Nanofluilds for Direct Application

作　　者：王德兵 汪玲玲 于伟 谢华清 WANG De-Bing;WANG Ling-Ling;YU Wei;XIE Hua-Qing(College of Engineering,School of Environmental and Materials Engineering,Shanghai Polytechnic University,Shanghai 201209,China)

机构地区：[1]上海第二工业大学工学部环境与材料工程学院

出　　处：《工程热物理学报》2020年第2期443-447,共5页Journal of Engineering Thermophysics

基　　金：国家自然科学基金资助项目(No.51876112;No.51590901);上海市曙光计划(No.16GS-52);上海第二工业大学项目基金(No.EGD18YJ0042)

摘　　要：本文通过"两步法"制备了一种具有高光热转换效率的Fe304-H20磁性纳米流体。该纳米流体可以通过磁分离技术实现纳米颗粒与基液的分离,使得纳米流体基液得以直接使用,同时具有优异的可重复利用性能。实验结果表明,在1200 s内其光热转化效率高达70.2%,并且经过60次的循环使用后无明显的衰减。此研究结果为实现纳米流体基液的直接应用提供了可行性的方案。Fe3O4-H2O magnetic nanofluids with high photothermal conversion efficiency were prepared by the so-called two-step method,which can be easily separated by using an external magnetic field.The experimental results show that the maximum photo-thermal conversion efficiency of Fe3O4-H2O nanofluids can reach nearly 70.2%in 1200 s.And the magnetic photothermal nanofluilds can be reused at least 60 successive cycles without significant loss of photothermal conversion efficiency.This study paves a new avenue for direct use the base liquid of nanofluids in the solar thermal conversion technique.

关 键 词：磁性光热纳米流体 光热转化 可重复利用性 太阳能利用 

分 类 号：TK124[动力工程及工程热物理—工程热物理]