摘要：IN THIS PAPER, BY MEASUREMENT OF THE ZETA POTENTIAL AND HYDRODYNAMIC DIAMETER THE SURFACE MODIFICAT...IN THIS PAPER, BY MEASUREMENT OF THE ZETA POTENTIAL AND HYDRODYNAMIC DIAMETER THE SURFACE MODIFICATION AND DISPERSIVE BEHAVIOR OF CU NANOPARTICLES IN WATER WERE INVESTIGATED UNDER DIFFERENT PH VALUES AND DIFFERENT CONCENTRATION OF SODIUM DODECYLBENZENESULFONATE (SDBS) DISPERSANT. THE EXPERIMENTAL RESULTS SHOW THAT THE MAGNITUDE OF ZETA POTENTIAL HAS VERY CORRESPONDING RELATION WITH HYDRODYNAMIC DIAMETER, THE HIGHER MAGNITUDE OF ZETA POTENTIAL AND THE SMALLER HYDRODYNAMIC DIAMETER ARE, THE BETTER DISPERSION STABILITY OF THE NANO-COPPER SUSPENSIONS ARE. THE EXPERIMENTAL RESULTS ALSO NOTE THAT SDBS CAN SIGNIFICANTLY AFFECT THE VALUE OF ZETA POTENTIAL AND HYDRODYNAMIC DIAMETER BY ELECTROSTATIC REPULSIONS, WHICH LEAD TO THE ENHANCEMENT OF THE STABILITY OF THE CU SUSPENSIONS, AND THAT THE OPTIMIZING CONCENTRATION OF SDBS IS 0.07％ FOR 0.1％ COPPER NANO-SUSPENSIONS WHICH HAS THE BEST DISPERSE RESULTS.显示全部
摘要：NANOFLUIDS HAVE BEEN ATTRACTIVE FOR THE LAST FEW YEARS WITH THE ENORMOUS POTENTIAL TO IMPROVE THE E...NANOFLUIDS HAVE BEEN ATTRACTIVE FOR THE LAST FEW YEARS WITH THE ENORMOUS POTENTIAL TO IMPROVE THE EFFICIENCY OF HEAT TRANSFER FLUIDS. IN THIS STUDY, THE THERMAL CONDUCTIVITY OF AL2O3-WATER NANOFLUIDS WAS MEASURED BY A HOT DISK THERMAL CONSTANTS ANLYSER, AND THE EFFECTS OF PH VALUE, SODIUM DODECYLBENZENESULFONATE (SDBS) CONCENTRATION AND NANOPARTICLE CONCENTRATION ON THE THERMAL CONDUCTIVITY OF AL2O3 NANOPARTICLES IN DEIONIZED WATER WERE DISCUSSED. THE RESULTS SHOWED THAT THE THERMAL CONDUCTIVITY ENHANCEMENTS OF AL2O3-WATER NANOFLUIDS ARE HIGHLY DEPENDENT ON PH VALUES, THE WEIGHT FRACTION OF NANOPARTICLE AND SDBS DISPERSANT CONCENTRATION OF NANO-SUSPENSIONS. THE AL2O3-WATER NANOFLUIDS WITH AN OUNCE OF AL2O3 HAVE NOTICEABLY HIGHER THERMAL CONDUCTIVITY THAN THE BASE FLUID WITHOUT NANOPARTICLES, FOR AL2O3 NANOPARTICLES AT A WEIGHT FRACTION OF 0.0015 (0.15 WT ％), THERMAL CONDUCTIVITY WAS ENHANCED BY UP TO 10.1％, WITH AN OPTIMAL PH VALUE AND SDBS CONCENTRATION FOR THE HIGHEST THERMAL CONDUCTIVITY. THEREFORE, THE COMBINED TREATMENT WITH BOTH THE PH AND CHEMICAL DISPERSANT IS RECOMMENDED TO IMPROVE THE THERMAL CONDUCTIVITY FOR PRACTICAL APPLICATIONS OF NANOFLUID.显示全部
