PREPARATION OF MONODISPERSE ELLIPSOIDAL POLYSTYRENE PARTICLES
PREPARATION OF MONODISPERSE ELLIPSOIDAL POLYSTYRENE PARTICLES
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DOI：
10.1007/bf00657391
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发表时间：
1993-05-01
影响因子：
2.4
通讯作者：
OTTEWILL, RH
中科院分区：
文献类型：
--
作者：
HO, CC;KELLER, A;OTTEWILL, RH
描述了一种制备胶体尺寸范围内的单分散椭球形聚苯乙烯颗粒的方法。将单分散聚苯乙烯颗粒分散在聚乙烯醇溶液中。然后使该分散体通过蒸发形成含有球形聚苯乙烯颗粒的聚乙烯醇薄膜。将该膜的条带夹在金属框架中，在油浴中快速加热至200 ℃并拉伸至预定程度以将球形颗粒转化为椭球体;然后冷却膜。通过这种方法得到了各种初始颗粒尺寸的宽范围的轴比。
A method is described for the preparation of monodisperse ellipsoidal particles of polystyrene in the colloidal size range. Monodisperse polystyrene particles were dispersed in a solution of polyvinyl alcohol. This dispersion was then allowed to form, by evaporation, a thin film of polyvinyl alcohol containing spherical polystyrene particles. Strips of this film were clamped into a metal frame, heated rapidly in an oil bath to 200-degrees-C and stretched to a predetermined extent in order to convert the spherical particles into ellipsoids; the film was then cooled. A wide range of axial ratios for a variety of initial particle sizes was obtained by this method.