- 作者: 丘穎哲 ; 張精言
- 作者服務機構: 中原大學化學系
- 中文摘要: This paper will demonstrate a method for determining the micellar dissociation concentration (MDC) of polyoxyethylene mono n-decylether nonionic surfactants in water. Turbidity and surface tension measurements were applied to commercial samples without further purification. Complicated curves containing turbidity maxima and surface tension minima were obtained for some impure samples. It is difficult to determine the critical micellar concentration(CMC) for impure surfactants. Explanations are given for all curves obtained for pure and impure samples and the method of identifying the MDC values is illustrated. It is more practical for surfactant users to determine the MDC values in their own laboratory than to search for the CMC values in the literature when the surfactants are impure.
- 英文摘要: --
- 中文關鍵字: Micelle; Cmc; Mdc; Nonionic Surfactant; Surface Tension; Turbidity; Micellar Dissociation Concentration; Critical Micellar Concentration
- 英文關鍵字: 膠體微粒;臨界膠體微粒濃度;膠體微粒解離濃度;非離子性界面活性劑;表面張力;混濁度;微胞