●●● ●●●● 2. Experiment principles ●●●●● ●●●● ●●●●● ●●●● Colloidal sol is a highly dispersed system with solid of very small solubility dispersing in liquid. Its diameter changes in the range of 10-to 10-meter. The formation of stable colloidal material involves two facets: the dimension of the dispersed phase within the colloidal range; the particles dispersed in liquid should not aggregate, so stabilizing agent usually added Basically, the preparations of colloidal systems involve either degradation of bulk matter or aggregation of small molecules, ions or particles.2. Experiment principles Colloidal sol is a highly dispersed system with solid of very small solubility dispersing in liquid. Its diameter changes in the range of 10-7 to 10-9 meter. The formation of stable colloidal material involves two facets: the dimension of the dispersed phase within the colloidal range; the particles dispersed in liquid should not aggregate, so stabilizing agent usually added. Basically, the preparations of colloidal systems involve either degradation of bulk matter or aggregation of small molecules, ions or particles