含Ag-乙二醇纳米流体的制备及其导热性能  

A Facile Method for Preparation of Fluids Containing Ag Nanoparticles and Their Thermal Conductivity Capacity

作　　者：丁雅勤[1,2] 黄静[1,2] 马新星[2,3] 石华强[2,3] DING Ya-qin;HUANG Jing;MA Xin-xing;SHI Hua-qiang(Research Institute of Exploration and Development,Oil&Gas Fields,Xi an 710021,China;National Engineering Laboratory for Exploration and Development of Low-Permeability,Oil&Gas Fields,Xi'an 710021,China;Changing Oilfield Company,Oil&Gas Fields,Xi'an 710021,China)

机构地区：[1]长庆油田分公司勘探开发研究院,西安710021 [2]长庆油田分公司低渗透油气田勘探开发国家工程实验室,西安710021 [3]长庆油田分公司油气工艺研究院,西安710021

出　　处：《科学技术与工程》2018年第18期169-173,共5页Science Technology and Engineering

摘　　要：在室温下采用直接还原法制备了含PVP表面修饰、高负载量的纳米银-乙二醇纳米流体。实验详细比较了各种反应条件对Ag纳米粒子结构、大小、形貌以及乙二醇纳米流体的稳定性、负载量的影响。结果表明:由于PVP对银粒子有良好的表面修饰作用和纳米粒子自身的布朗运动,使得银粒子能够稳定地分散于乙二醇流体中。当PVP含量为12.5 g·L^(-1)时,Ag粒子最大负载量可以达到20.96 g·L^(-1)。同时采用仿制的纳米流体导热系数测试装置测定了上述不同负载量流体的导热系数,结果表明纳米流体比纯乙二醇的导热系数明显提高;当银粒子的体积分数为0.06%时,纳米流体的导热系数提高了36%。Ethylene glycol nano-fluids containing Ag particles modified with polyvinylpyrrolidone(PVP)were obtained directly by a reducing method at room temperature.The influence of reaction conditions on the structure,size,and morphology of Ag nano-particles were characterized with XPS,XRD,TEM,FT-IR,Uv-vis,TG-DSC and size distribution.The loading concentration and stability performance of the nano-fluids were analyzed detailed by the sedimentation measurement.The results showed that the obtained Ag nano-particles could be dispersed steadily in ethylene glycol because of the good surface modification effect and the Brown movement itself.When the PVP content is 12.5 g·L-1,the loading concentration of Ag nano-particles was as high as 20.96 g·L-1.Moreover,the thermal conductivity coefficient of the glycol fluids containing different loading concentration of Ag nano-particles were measured by the transient hot-wire method.The results showed that the thermal conductivity coefficient of the nano-fluid was increased by 36%compared with the pure glycol fluid when the volume fraction of the silver particle was 0.06%.

关 键 词：银 纳米流体 负载量 导热系数 

分 类 号：TE357.1[石油与天然气工程—油气田开发工程]