Taiwan. Two scientists from the Institute of Polymer Science and Engineering at National Taiwan University reported the discovery of a new form of dispersion in water of organic pigments insoluble in this liquid, using a spraying technique of a particular type of clay called smectite.This synthetic fluorinated mica clay allows the homogenization of pigments thanks to its colloidal properties and its microscopic geometric shape, on which the pigments adhere without losing their size of 70 nm by 2 μm.
To test the effectiveness of the method in practical applications, the aqueous suspension was mixed with PVA and applied on polymer films, confirming the possibility of manufacturing color filters and avoiding the use of organic surfactants and conventional solvents.
