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首页> 外文期刊>Journal of Microencapsulation: Microcapsules Liposomes Nanoparticles Microcells Microspheres >Alkylcyanoacrylate nanocapsules prepared from mini-emulsions: A comparison with the conventional approach
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Alkylcyanoacrylate nanocapsules prepared from mini-emulsions: A comparison with the conventional approach

机译：微乳液制备的氰基丙烯酸烷基酯纳米胶囊：与传统方法的比较

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Polyalkylcyanoacrylate nanocapsules are being prepared using two different types of o/w-emulsions: a conventional emulsion generated by intensive stirring with a home-made device and a mini-emulsion produced by the action of ultrasonic dispersion,using the alkylcyanoacrylate monomer as a hydrophobic agent.The emulsions and the resulting nanocapsule dispersions are compared using various methods of physical characterization.The formation of solid capsules is indicated by solid state NMR spectra and atomic force microscopy.Differences between the results of both synthetic approaches are found in terms of particle size distribution,zeta potential and tendency towards particle agglomeration.Capsules prepared by ultrasound via the mini-emulsion pathway tend to be smaller and more monodisperse.Their zeta potential is negative with larger absolute values as compared to capsules obtained from conventional emulsions,leading to stronger repulsive interactions and a higher stability against capsule agglomeration.
机译：使用两种不同类型的o / w乳液制备聚氰基丙烯酸烷基酯纳米胶囊：使用氰基丙烯酸烷基酯单体作为疏水剂，通过使用自制设备进行强烈搅拌而产生的常规乳液，以及通过超声分散作用而产生的微乳液。使用各种物理表征方法比较乳液和所得的纳米胶囊分散液，固态NMR谱图和原子力显微镜显示固态胶囊的形成，两种合成方法的结果在粒径分布方面存在差异，zeta电位和颗粒团聚趋势。通过微乳液途径超声制备的胶囊往往更小且更分散。与常规乳液相比，它们的zeta电位为负，绝对值较大，从而导致较强的排斥相互作用对capsu的稳定性更高团聚。

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