ANALYSIS OF WATER ENTRAPMENT INTO DISPERSED W/O EMULSION DROPS

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

KAZUMI TAKAGI²  FUMIYUKI NAKASHIO¹  TADASHI HANO²  TAKAAKI OHTAKE² 

[1] Department of Organic Synthesis, Kyushu University;Department of Environmental Chemistry and Engineering, Oita University

关键词: Mixing;    Liquid Surfactant Membrane;    W/O Emulsion;    (W/O)/W Emulsion;    Water Entrainment;    Drop Diameter;    Stirred Tank;   

DOI  :  10.1252/jcej.21.272

来源: Maruzen Company Ltd

【 摘 要 】

References(10)Cited-By(17)The effects of operating conditions on mechanical water entrainment into W/O emulsion drops in a (W/O)/W emulsion system were studied in a stirred tank in the absence of permeation due to osmotic pressure. The water entrainment was influenced by surfactant concentration, water volume fraction in W/O emulsion, inner water drop size, salt concentration in the external water phase, and agitation speed in the stirred tank. There was a satisfactory correlation between the extent of water entrainment and the weight of surfactant per unit interfacial area. These observations suggested that water entrainment proceeded as a result of additional emulsification at the drop surface. This idea was confirmed by examining the water entrainment in an oil-water dispersion system where water entrainment occurred by ernulsification. The effects of the operating conditions on water entrainment in the oil-water dispersion system were quite similar to those in the (W/O)/W emulsion system. In addition, the volume of water entrained per unit surface area of dispersed oil drops was in fair agreement with that in the (W/O)/W emulsion system. These results supported the proposed mechanism of water entrainment.

【 授权许可】

Unknown