This paper presents a procedure for preparing a nanofluid which is solid–liquid composite material consisting of solid nanoparticles with sizes typically of 1–100 nm suspended in liquid. By means of the procedure, Cu–H2O nanofluids with... This paper presents a procedure for preparing a nanofluid which is solid–liquid composite material consisting of solid nanoparticles with sizes
typically of 1–100 nm suspended in liquid. By means of the procedure, Cu–H2O nanofluids with and without dispersant were prepared, whose
sediment photographs and particle size distribution were given to illustrate the stability and evenness of suspension with dispersant. Aiming
at the dispersion of nano-Cu is regarded as the guide of heat transfer enhancement, the dispersion behavior of Cu nanoparticles in water were
studied under different pH values, different dispersant types and concentration by the method of zeta potential, absorbency and sedimentation
photographs. The results show that zeta potential has good corresponding relation with absorbency, and the higher absolute value of zeta potential
and the absorbency are, the better dispersion and stability in system is. The absolute value of zeta potential and the absorbency are higher at
pH 9.5. Hexadecyl trimethyl ammonium bromide (CATB) and sodium dodecylbenzenesulfonate (SDBS) can significantly increase the absolute
value of zeta potential of particle surfaces by electrostatic repulsions, and polyoxyethylene (10) nonyl phenyl ether (TX-10) can form a thick
hydration layer on the particle surfaces by steric interference, which leads to the enhancement of the stability for Cu suspensions. In the 0.1%
copper nano-suspensions, the optimizing concentrations for TX-10, CATB, and SDBS are 0.43, 0.05, and 0.07%, respectively, which have the
best dispersion results.
. 2007 Elsevier Inc. All rights reserved.
Keywords: Copper nano-suspensions; Dispersion and stability; Zeta potential; Absorbency
本文提出一种程序是准备介绍固-液复合材料组成的纳米粒子与固体的规格
通常的1海里悬浮在液体中。通过这一过程,Cu-H2O有和没有nanofluids分散剂有准备的
泥沙照片和粒度分布是说明稳定性和均匀度的悬架分散剂。针对
在nano-Cu中的分散性的指南被视为传热的增强、分散行为的铜纳米粒子在水处理
栽培条件下,研究了不同pH值、不同分散剂的类型和浓度的方法、吸湿性、泥沙淤积泽塔潜力
拍摄的照片。结果表明,具有良好的对应关系,泽塔潜力与吸湿性、以及较高的值泽塔的潜力
和吸收性,更好的分散性和稳定性在系统是。值的泽塔潜力和吸收性更高一点
pH 9.5。三甲基溴化铵Hexadecyl CATB)和十二烷基苯磺酸钠进行(),可显著提高
潜在的价值由泽塔琼斯粒子表面静电排斥作用造成,国际上(10)与苯醚(TX-10)能形成一个厚
在粒子表面保湿层由硬脂干扰,而导致的稳定性增强铜停赛。在0.1%
铜nano-suspensions浓度为TX-10网络的优化,CATB 0.43,十二是,0.05,和0.07%,分别有
Z好的分散效果。
2007年农业股份有限公司。保留所有权利。
关键词:铜nano-suspensions;色散和稳定性;泽塔潜能;吸光度的变化