Production of water-in-oil nanoemulsions using high pressure homogenisation: A study on droplet break-up
Production of water-in-oil nanoemulsions using high pressure homogenisation: A study on droplet break-up
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DOI：
10.1016/j.jfoodeng.2014.01.024
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发表时间：
2014-06
影响因子：
5.5
通讯作者：
Laura Lee;Robin D Hancocks;I. Noble;I. Norton
中科院分区：
文献类型：
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作者：
Laura Lee;Robin D Hancocks;I. Noble;I. Norton
在本文中，我们比较了一个微流化器的效率，高压阀均质器（HPH）的油连续乳液的生产，通过调查的影响，压力，通过数，相粘度和盐添加液滴的大小。结果表明，微流化器和HPH具有相似的乳化效率，在50 MPa压力下可得到直径约60 nm的液滴。通过将压力增加到100 MPa，液滴直径在两个装置中减小了10 nm。增加HPH中的通过次数导致液滴尺寸增加，这可能是由于多次通过导致聚结增加的温度升高。将粘度比从0.001改变到1导致液滴尺寸的最小变化，这表明当破裂发生时，流动是伸长的，而不是如预期的那样是湍流的。
In this paper we compare the efficiency of a Microfluidizer to a high pressure valve homogeniser (HPH) for the production of oil continuous emulsions by investigating the effect of pressure, number of passes, phase viscosities and salt addition on droplet size. The results obtained show that the Microfluidizer and HPH have similar emulsification efficiency, giving droplets of ∼60 nm diameter at a pressure of 50 MPa. By increasing the pressure to 100 MPa the droplet diameter was reduced by 10 nm in both devices. Increasing the number of passes in the HPH caused an increase in droplet size probably as a consequence of the temperature increase from multiple passes causing an increase in coalescence. Changing the viscosity ratio from 0.001 to 1 resulted in a minimal change in droplet size indicating that the flow is elongational when break-up occurs rather than turbulent as expected.