Abstract:
This independent study aims to design and develop homogenizer to reduce particle size of emulsion to minimum 1 micrometer. An in-line homogenizer was selected to be tested because it can be changed to various parameters including number and size of stator screen, motor speed and pressure in feeding tank. Cream with high viscosity and lotion with low viscosity were tested. Emulsion cream produced by triple stator, motor speed of 3,000 rpm and 0 bar in feeding tank has particle size of 0.2382 micrometer with good stability. Emulsion lotion produced through single stator, motor speed 3,000 rpm and 6 bar in feeding tank has particle size of 1.1597 micrometer with good stability. Higher motor speed makes emulsion unstable because of high compression and high shear which creating high temperature leading to unstable emulsion. However, for energy saving and reasonable size of mixer, high viscosity emulsion should be used homogenizer with triple stator, motor speed 3,000 rpm with no pressure (particle size 0.2382 micrometer) and low viscosity emulsion should be used homogenizer with single stator, motor speed 3,000 rpm with no pressure. (particle size 1.6999 micrometer)