Study on Stability of Al2O3-Nanoparticles with Different Dispersants
As us known, nanofluids can enhance heat transfer, and the dispersion and stability of nanofluids are the key factors to enhance heat transfer, so in this paper we mainly discussed the factors which can influence the dispersion of Al2O3-nanosuspensions. Through zeta-potential and particle size measurements in Al2O3-nanosuspensions, the influence of different pH value and the three different kinds of dispersants ( SDBS, CATB and Gum arableic) on the dispersion of Al203-nanoparticles were discussed. We find that the absolute value of zeta - potential is the biggest and the size of particles is the smallest with SDBS and Gum arabic dispersants when the pH value of nanofluids is about 8, and the absolute value of zeta - potential is the biggest and the size of particles is the smallest with CATB dispersants when the pH value of nanofluids is about 2～3. We also find that nanofluids has a good dispersion when SDBS used as dispersant, which has the biggest absolute value of Zeta - potential and the smallest particle size.
Al2O3-nanoparticle dispersant dispersion and stability zeta-potential particle size
ZHU Dong-sheng LI Hua WANG Xian-ju LI Xin-fan
The Key Laboratory of Enhanced Heat Transfer &Energy Conservation, College of Chemical and Energy Engineering, South China University of Technology, Guangzhou 510640, China
国际会议
北京
英文
254-255
2006-08-03（万方平台首次上网日期，不代表论文的发表时间）