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The effect of the hydrophobicity of microchannels and components in water and oil phases on droplet formation in microchannel water-in-oil emulsification

机译:水和油相中微通道和组分的疏水性对微通道油包水乳化过程中液滴形成的影响

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The effects of the hydrophobicity of silicon microchannels and components in the oil and water phases in the production of monodispersed water-in-oil (W/O) emulsions by microchannel emulsification was investigated. Several types of silane coupler reagents were applied to make the microchannel hydrophobic. The hydrophobicity of the surface was evaluated by contact angle measurements. Hexane, decane and oleic acid were used as the oil phase. and pure water and sucrose solution were used as the water phase. Tetraglycerol polyricinoleate, sodium bis(2-ethylhexyl) sulfosuccinate and sorbitan fatty acid esters were used as surfactants. The contact angle of a water droplet on the modified silicon microchannel plate in an oil phase was found to be dependent on the composition of the oil phase, the surfactant type and the silane coupler reagent used for surface modification. When the contact angle was greater than 120 degrees, monodispersed water droplets were Formed and the geometric standard deviation was below 1.06. The average droplet size varied from 17 to 23 mum, and was affected by the characteristics of the surfactant and the viscosities of the water and oil phases. (C) 2001 Elsevier Science B.V. All rights reserved. [References: 12]
机译:研究了微通道乳化生产单分散油包水(W / O)乳液中硅微通道和油相和水相中组分的疏水性的影响。应用几种类型的硅烷偶联剂使微通道具有疏水性。通过接触角测量来评估表面的疏水性。己烷,癸烷和油酸用作油相。用纯水和蔗糖溶液作为水相。使用四甘油聚蓖麻油酸酯,双(2-乙基己基)磺基琥珀酸钠和脱水山梨糖醇脂肪酸酯作为表面活性剂。发现水滴在油相中在改性硅微通道板上的接触角取决于油相的组成,表面活性剂类型和用于表面改性的硅烷偶联剂。当接触角大于120度时,形成单分散的水滴并且几何标准偏差低于1.06。平均液滴尺寸在17至23μm之间变化,并且受表面活性剂的特性以及水和油相的粘度影响。 (C)2001 Elsevier Science B.V.保留所有权利。 [参考:12]

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