INFLUENCE OF SDBS ON STABILITY OF COPPER NANO-SUSPENSIONS
Dispersion and stability of Cu nano-suspensions with dispersant is the important base for the study of rheology and heat transfer enhancement of the suspensions. This paper presented a procedure for preparing a nanofluid which was a suspension consisting of nanophase powders and a base liquids. By means of the procedure, Cu-H2O nanofluids with and without dispersant were prepared, whose sedimentationphotographs were given to illustrate the stability and evenness of suspension with dispersant. Dispersion and stability of Cu nanoparticles in water were studied under different pH values and the concentration of sodium dodecylbenzenesulfonate (SDBS) dispersant by the method of zeta potential, absorbency and sedimentation photographs. The results show that zeta potential has very corresponding relation with absorbency, and the higher absolute value of zeta potential and absorbency are, the better dispersion and stability in system is. The absolute value of zeta potential and absorbency are higher at pH 9.5. SDBS can significantly increase the absolute value of the zeta potential of the particle surfaces by electrostatic repulsions, which leads to the enhancement of the stability of the Cu suspensions. The optimizing concentration for SDBS in the 0.1％ copper nano-suspensions is 0.07％, which has the best disperse results.
copper nano-suspensions SDBS dispersion and stability zeta potential absorbency
Xinfang Li Dongsheng Zhu Gang Chen Xianju Wang
Key Lab of Enhanced Heat Transfer and Energy Conservation ，the Ministry of Education ，School of Chem Key Lab of Enhanced Heat Transfer and Energy Conservation ，the Ministry of Education ，School of Chem Mechanical Engineering Department ，Massachusetts Institute of Technology ，Cambridge, MA 02139
国际会议
海南三亚
英文
2007-01-10（万方平台首次上网日期，不代表论文的发表时间）