Stable dispersion

Milky dispersion stable Translucent to clear solution... 

Poiy(N-vinyl-2-pyrrolidone), PVP Bimetallic Pd-Pt particles Refluxing mixed solutions of palladium(II) chloride and hexachloroplatmicfTV) acid in ethanol-water (1 1, v/v) in the presence of PVP resulted in the formation of well-dispersed, stable, polymer-protected Pd-Pt particles 58... 

Unstable milky dispersion Stable milky dispersion Translucent dispersion/solution Clear solution... 

Early calibration materials were often pollen since these have a very narrow size range. Arguments persist as to whether these swell in liquids or change size over time. Polymer latices are also available as calibration material. When instruments are used regularly to test a limited range of products the product itself can be used for calibration purposes. Thus a manufacturer of titanium dioxide may set aside an easily dispersed, stable sample for sample splitting and subsequent use for instrument evaluation. 

IVhy are Colloidal Dispersions Stable I Basic Principles... 

Moderately easy to disperse, stable, inexpensive, relatively clean and bright colors Moderate tint strength, inexpensive, moderately stable and durable Strong and bright colors, moderate durability... 

The formed PEGylated Au DENPs were water-dispersible, stable in a pH range of 5-8 and a temperature range of 0-50°C, and noncytotoxic at a concentration as high as 100 p,M. They enabled not only X-ray CT blood pool imaging of mice and rats after intravenous injection of the particles, but also effective CT imaging of a xenograft tumor model in nude mice [37]. 

Plant gum, separated from a sap as an acetone insoluble part, showed an IR spectrum characteristic of the polysaccharides in a salt form. However, the aceone insoluble part of the lacquer showed an IR spectrum having characteristic peaks of the plant gum and urushiol. Furthermore, though sap is partly soluble in toluene, it becomes completely soluble in toluene when made into lacquer. These results may suggest that the water soluble gum becomes soluble or dispersible stable in the oil(urushiol)phase as a result of grafting of urushiol on the plant gum(polysaccharides) in the lacquer-making process. 

Discuss the result. Is this colloidal dispersion stable ... 

Stable (shelf life 5 18 months) dispersions are obtained, with particle size of 30-35 nm. From these dispersions, stable elastic films with high mechanical properties (tensile strength, a, of 8.9 40.0 MPa and elongation at break, e, in the range of 400-1500%) can be formed. 

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