摘要
采用"两步法"成功合成了Cu-乙二醇导热纳米流体,并确定出合成Cu-乙二醇导热纳米流体的较佳分散剂为阿拉伯树胶,其分散稳定机理不但受到静电稳定机理的影响,也受到空间位阻稳定机理的影响。Cu-乙二醇导热纳米流体的较佳合成工艺:pH=5~6,阿拉伯树胶的投料量为质量分数1%,纳米Cu的投料量为质量分数8%。在25℃时测得该导热纳米流体的导热系数为0.429 5W/m·K,比纯乙二醇的导热系数提高44.8%。SEM表征表明纳米Cu的分散性导致该纳米流体较稳定。
Cu-ethylene glycol thermal conduction nanofluids were successfully synthesized in the laboratory by two step method.It was proved that gum arabic is better dispersant of Cu-ethylene glycol thermal conduction nanofluids,and the dispersion mechanism is not only electrostatic stabilization but also steric stabilization.The optimal conditions:pH is 5to 6,gum arabic content is 1%,and nano Cu content is 8%.SEM proved that dispersion of Cu-ethylene glycol thermal conduction nanofluids is excellent.Thermal conductivity is 0.429 5W/m·K at 25℃,and 44.8% higher than the pure ethylene glycol,and stable time of nanofluids is up to a month.
出处
《化工科技》
CAS
2016年第2期14-18,共5页
Science & Technology in Chemical Industry
基金
国家地区科学基金资助项目(51266006)
关键词
纳米流体
导热
分散稳定性
阿拉伯树胶
Nanofluids
Thermal conduction
Dispersion stability
Gum arabic
