Effect of high-pressure homogenization on droplet size distributions and rheological properties of model oil-in-water emulsions.
Effect of high-pressure homogenization on droplet size distributions and rheological properties of model oil-in-water emulsions.
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DOI：
10.1016/s1466-8564(00)00012-6
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发表时间：
2000-01-01
影响因子：
6.6
通讯作者：
Lardieres, J.
中科院分区：
文献类型：
--
作者：
Floury, J.;Desrumaux, A.;Lardieres, J.
一种新的超高压均质器高达350 MPa，用于实现非常精细的水包油乳液。研究了均质压力（20至300 MPa）对乳清蛋白稳定的模型乳液的影响。通过激光散射测量油滴尺寸分布。用同轴圆筒流变仪表征流变性能。结果表明，随着压力的增加，乳液的结构和质地发生了显着变化。超高压乳化条件使高含油量（>40% w. w. B）的乳状液从剪切稀化行为（20 MPa）转变为牛顿行为（300 MPa）。液滴尺寸随着压力的增加而减小。然而，流量曲线不能完全解释的液滴尺寸分布。
A new ultra high-pressure homogenizer going up to 350 MPa, was used to realize very fine oil-in-water emulsions. The effect of homogenizing pressure (from 20 to 300 MPa) was studied on model emulsions stabilized by whey proteins. Oil droplet size distributions were measured by laser-light scattering. Rheological properties were characterized with a coaxial cylinder rheometer. The results showed significant modifications in the structure and the texture of emulsions with increasing pressure. Ultra high-pressure homogenizing conditions brought about the high oil content emulsions (>40% w.w.b) from shear-thinning behaviours (at 20 MPa) to Newtonian behaviours (at 300 MPa). Droplet size was reduced with increasing pressure. However, the flow curves could not be fully explained by the droplet size distributions.