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標題: 超微粒子有機顏料分散研究
作者: 徐金旺
關鍵字: Supercritical Fluid;超臨界流體;Organic pigment;Nano-material;Dispersion;有機顏料;奈米材料;分散
出版社: 化學工程學系
Due to the development of science technology, many industries such as ceramics, metals, powders, and pigments must fineness to apply for the novel opto-electronic devices in the future. A dispersed particle that is less than 100nm on size is called superfine particle or nano-material. With large surface area and high activity energy, the ultra-microscopy in particle is filled by dispersion into the matrix structure for a thinner and super performance of opto-electronic and information like color filter, flat plate display, high density and thermal reversible digital versatile disc, ultra-thinning insulation of electrical magnetic interruption, and so on.
This research develops a method to disperse nano-organic pigments using the supercritical fluid. Taking a supercritical fluid with low surface tension and high diffusion coefficient as solvent, the nano-scale powder may be wetted and swelled effectively to form the primary particles in the dispersing solution. For the phthalocyanine green pigment, the particle size of 93.5nm in the dispersing solution without the dispersant have been obtained by using supercritical carbon dioxide in this study. Additionally, through Taguchi method, in this dissertation the particle dimensions of aminoanthraquinone red, phthalocynaine green, and phthalocynaine blue organic components in the dispersing solution with the dispersant are respectively shown as follows: (1) 178.5nm at a stability of 4 hours, (2) 121.9nm at a stability of 6 hours, and (3) 187.4nm at a stability of 3 hours under the optimum conditions of dispersion on the operations of supercritical carbon dioxide.

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