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胶体既不是一种特殊类型的物质,也不是某类物质的固有的特性,而是分散相颗粒的直径大小在1×10~(-7)-1×10~(-5)厘米之间的分散体系,所以胶体是物质以一定分散程度存在的一种伏态。它的一些重要性质和颗粒大小有着密切的关系,丁达尔现象就是一例。英国物理学家丁达尔,在1869年发现,当一束光透过胶体时,从侧面可以观
Colloids are neither a special type of material nor the intrinsic property of a certain type of material, but the diameter of dispersed phase particles is between 1×10 -7 and 1×10 -5 cm. Dispersion system, so the colloid is a kind of volatility state that the substance exists in a certain degree of dispersion. Some of its important properties are closely related to particle size, and the Tyndall phenomenon is one example. British physicist Dindar found in 1869 that when a beam of light passes through the colloid, it can be seen from the side