石墨烯/氧化铝纳米冷却液稳定性和导热性能研究  

Study on Stability and Thermal Conductivity of Graphene/Alumina Nano Coolant

作　　者：侯献军[1,2,3] 叶心雨 王友恒 苏达 HOU Xian-jun;YE Xin-yu;WANG You-heng;SU Da(Hubei Key Laboratory of Advanced Technology for Automotive Components,Wuhan University of Technology,Wuhan 430070,China;Hubei Collaborative Inn ovation Center for Automotive Components Technology,Wuhan University of Technology,Wuhan 430070,China;Hubei Research Center for New Energy&Intelligent Connected Vehicle,Wuhan University of Technology,Wuhan 430070,China)

机构地区：[1]武汉理工大学现代汽车零部件技术湖北省重点实验室,武汉430070 [2]武汉理工大学汽车零部件技术湖北省协同创新中心,武汉430070 [3]武汉理工大学湖北省新能源与智能网联车工程技术中心,武汉430070

出　　处：《武汉理工大学学报》2022年第5期1-7,共7页Journal of Wuhan University of Technology

基　　金：国家自然科学基金(51875423)。

摘　　要：采用两步法制备了纳米粒子比例为1∶1的石墨烯/氧化铝混合纳米冷却液,使用自然沉降法、紫外-可见分光光度法和Zeta电位法研究了分散剂种类和浓度对纳米流体稳定性的影响,进一步研究了混合纳米粒子浓度和温度对冷却液导热性能的影响。结果表明:相比于PVP和SDS,使用SDBS作为分散剂具有最佳的稳定效果,分散剂和纳米粒子质量比为4∶1和6∶1时,纳米粒子沉降速率缓慢。增大纳米粒子浓度能显著提升流体的导热性能,30℃时,质量分数为0.5%和1%的流体导热系数提升分别为4.2%和6.1%。60℃,质量分数为1%时,导热系数提升幅度最大,为10%。Hybrid nano coolant of GNP/AlOnanoparticles in mixing ratio 1:1 was prepared by two-step method.The effects of the type and concentration of dispersants on the stability of the nanofluids were investigated using sedimentation test,UV-Vis spectroscopy and Zeta potential method.Further investigated the change of the thermal conductivity of nano fluids with the conentration of nanoparticles and temperature.The results show that compared with PVP and SDS,SDBS has the best stabilizing effect.When the mass ratio of dispersant and nanoparticles are 4:1 and 6:1,the sedimentation rate of nanoparticles is slow.Increasing the concentration of nanoparticles can significantly improve the thermal conductivity of the fluid.At 30℃,the thermal conductivity of the fluid with a mass fraction of 0.5% and 1 % increase by4.2% and 6.1 %,respectively.When the mass fraction is 1 % at 60℃,the thermal conductivity increases by 10%.

关 键 词：纳米流体 稳定性 导热系数 氧化铝 石墨烯 

分 类 号：TB383.1[一般工业技术—材料科学与工程]