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首页> 外文期刊>RSC Advances >Effect of shearing stress on the radial heterogeneity and chromatographic performance of styrene-based polymerised high internal phase emulsions prepared in capillary format
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Effect of shearing stress on the radial heterogeneity and chromatographic performance of styrene-based polymerised high internal phase emulsions prepared in capillary format

机译：剪切应力对毛细血管形式制备苯乙烯基聚合高内相乳液的径向异质性和色谱性能的影响

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Poly(styrene- co -divinylbenzene) monoliths were prepared from the polymerisation of water-in-monomer high internal phase emulsions consisting of a 90 vol% internal phase and stabilised by the non-ionic surfactant Span 80?. The materials were prepared in capillary housings of various internal diameters ranging from 150 μm to 540 μm by simply passing the emulsion through the capillaries. When low shear (300 rpm) was used for emulsification, the droplet and resulting void size distributions were observed to shift towards lower values when the emulsions were forced through capillaries of internal diameter less than 540 μm and all columns exhibited significant radial heterogeneity. When high shear was employed (14?000 rpm) the resulting emulsions preserved their structure when forced through these capillaries and possessed narrower void size distributions with no obvious radial heterogeneity observed upon curing. This resulted in significantly improved chromatographic performance for the separation of a standard mixture of proteins when compared to the materials prepared under low shear.
机译：聚（苯乙烯 - 共酰基苯苯苯苯）由单体内相高内相乳液的聚合制备，由90体积％的内相组成，并通过非离子表面活性剂80稳定稳定。通过简单地通过毛细管通过乳液，在各种内径的毛细管壳体中的各种内径的毛细管壳体中制备，其各种内径为150μm至540μm。当低剪切（300rpm）用于乳化时，观察到液滴和产生的空隙尺寸分布，当乳液通过小于540μm的内径毛细管施加乳液时向较低的值移位，并且所有柱表现出显着的径向异质性。当采用高剪切（14 000rpm）时，所得乳液在强制通过这些毛细血管时保留它们的结构，并且在固化时没有观察到没有明显的径向异质性的较窄的空隙尺寸分布。与在低剪切下制备的材料相比，这导致显着改善了用于分离蛋白质的标准混合物的色谱性能。

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