中文摘要：

以柠檬酸钠为分散剂,KBH4为还原剂,CuGSO4？？5H2O 为氧化剂,采用-步法直接合成了CuG水导热纳米流体.其最佳合成工艺条件为：n（CuSO4·5H2O）∶n （KBH4）=2.5∶1,柠檬酸钠的用量为0.07mol/L,温度为40 ℃,反应时间为100 min.TEM 表征表明该导热纳米流体中Cu纳米粒子分散较均匀;经激光光散射仪粒度分析得其分散粒子平均尺寸为1.1nm;在25 ℃时测得该导热纳米流体的导热系数为0.7812W/（m·K）,比纯水的导热系数提高30%.

英文摘要：

Cu-water thermal conduction nanofluids were synthetised by one step method using sodium citrate as dispersant,KBH4 as the reducing agent,CuSO4 ·5 H2 O as the oxidant.The technological parameter:n(CuSO4 ·5H2O)∶n(KBH4)=2.5∶1,the content of sodium citrate was about 0.7 mol/L,the reaction temperature was 40 ℃,the reaction time is 100 min.TEM proved that Cu nano-particles were uniformly dispersed in ther-mal conduction nanofluids;laser granularity apparatus showed that particle average size is 1 .1 nm;Thermal conductivity is 0.7812 W/(m·K)at 25 ℃,and 30% higher than pure water.