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Colloid is a term that has come to encompass solid particles suspended in a liquid (a colloidal dispersion), microscopic droplets in a liquid (an emulsion), or either solid or liquid phases suspended in a gas (an aerosol).
Examples. Continuous phase is often water. Wide range of sizes: bovine serum albumin: 3 nm. cells: tens of microns. Classify colloids as hydrophobic (e.g., carbon black) or hydrophilic (e.g., red blood cell). Stability of colloid: essential part of its function. whether or not it will coagulate.
Colloids – mixtures with particle sizes that are intermediate in size and do not settle out upon standing. Ex: glue, Jello, paint, smoke, milk Tyndall effect- the scattering of light in all directions.
Learning Objectives. By the end of this section, you will be able to: Describe the composition and properties of colloidal dispersions. List and explain several technological applications of colloids.
Learning Objectives. By the end of this section, you will be able to: Describe the composition and properties of colloidal dispersions. List and explain several technological applications of colloids.
Introduction to Colloid and Surface Chemistry 1.1 What are the colloids and interfaces? Why are they important? Why do we study them together? Colloid and surface chemistry is a core subject of physical chemistry. It is a highly interdisciplinary subject, of interest to diverse fields of science and engineering(pharmaceuticals,food,cosmetics,deter-
Solutions are homogeneous mixtures of two or more substances in which the components are present as individual atoms, molecules or ions. The individual components are uniformly distributed and are fare too small to be seen by eye. Liquid and gas solutions do not scatter much light and therefore are transparent (clear).
