Preparation And Characterization Of Sodium Chloride With Hollow Microsphere In Shape

Surfactant is a kind of amphiphilic compound that can be adhered to liquid surface. with the depth of the research on its physic and chemical properties , Surfactant was used to prepare the inorganic salts power. some research in the paper were carried on as follows:(1) The solubility data of sodium chloride in surfactant solution; composite surfactant system and inorganic salt was studied. Relationship between solubility and concentration of surfactant was discussed. Effects of surfactant, inorganic salt on the solubility balance of sodium chloride were discussed. The results indicate that the stability of the micelhzation was contributed to the solubility of sodium chloride; the solubility of sodium chloride would be weakened with increasing sodium sulfate.(2) Effect of concentration, structure of surfactant on the viscosity of the composite system were studied. Relationship between viscosity and tension of the solution were discussed and effect of sodium chloride on the viscosity of the surfactant was discussed. the viscosity is 8mPa·S when SDS is 0.25wt%. the Max of the viscosity of the system is 125mPa·S when AES is 36wt%. effect of concentration of SDBS on the viscosity of the system was not evident.(3) The microstructure of NaCl crystal was characterized by XRD and SME. Effects of concentration, structure of surfactant on crystallization of sodium chloride were researched. the reason of the crystallization were discussed .(4) Mixed solution with surfactant composition was spray-dried to form composite sodium chloride powder. The results indicate that the powder particles are hollow-spherical in shape with 10～30μm diameter and the density of the powder was varied with the quality ratio of the surfactant. The Max of the density is 0. 38gml^-1 when the quality ratio of the surfactant was 5% while the min is 0. 20gml^-1 whent the quality ratio is 20%.