...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Crystal growth & design >First study on the effects of interfacial curvature and additive interfacial density on heterogeneous nucleation. Ice crystallization in oil-in-water emulsions and nanoemulsions with added 1-heptacosanol
【24h】

First study on the effects of interfacial curvature and additive interfacial density on heterogeneous nucleation. Ice crystallization in oil-in-water emulsions and nanoemulsions with added 1-heptacosanol

机译：首先研究界面曲率和附加界面密度对异相形核的影响。添加了1-庚糖醇的水包油乳液和纳米乳液中的冰晶

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Extended classical nucleation theory predicts that heterogeneous crystallization on a convex substrate will be less efficient than for the planar case. In this article, we present the first systematic study of the effects of interfacial curvature on crystallization. Decane-in-water nanoemulsions and emulsions have been prepared with droplet sizes of similar to 67 nm, similar to 280 nm, and similar to 1.9 mu m, which are stabilized by the passive nonionic surfactant, Brij 30. Ice nucleation is induced at the curved decane-water interface by 1-heptacosanol, which can cause ice formation at temperatures as high as -4.5 to -7 degrees C at the corresponding planar interface. Differential scanning calorimetry and optical microscopy data show that the similar to 280 nm and similar to 1.9 mu m droplet systems induce ice formation at temperatures up to -8 +/- 2 to -9 +/- 2 degrees C, for 1-heptacosanol interfacial concentrations of similar to 2-8% and similar to 4-11%, respectively. In comparison, ice nucleation only occurs at temperatures up to -13 +/- degrees C in the similar to 67 nm droplets, which have higher interfacial 1-heptacosanol concentrations of between similar to 9 and 21%. The extended classical nucleation theory is insufficient to explain the extent of the reduced nucleating ability in the similar to 67 nm nanoemulsions, and so we propose that the nucleating ability of 1-heptacosanol is also reduced as the interfacial curvature increases.
机译：扩展的经典成核理论预测，在凸形基板上进行异质结晶的效率将低于平面情况。在本文中，我们对界面曲率对结晶的影响进行了首次系统研究。制备了癸烷水纳米乳剂和乳剂，其液滴尺寸近似67 nm，近似280 nm，近似1.9μm，并通过钝化非离子表面活性剂Brij 30稳定。 1-庚烷醇弯曲的癸烷-水界面弯曲，可在相应的平面界面上在-4.5至-7摄氏度的高温下形成冰。差示扫描量热法和光学显微镜数据表明，对于1庚糖醇界面，类似于280 nm和类似于1.9μm的液滴系统会在高达+/- 8至2至-9 +/- 2的温度下诱导结冰。浓度分别接近2-8％和接近4-11％。相比之下，类似于67 nm的液滴，冰核化仅在高达-13 +/-摄氏度的温度下发生，液滴中的1－庚糖醇界面浓度较高，介于9％和21％之间。扩展的经典成核理论不足以解释类似于67 nm纳米乳液的成核能力降低的程度，因此我们建议1-庚烷醇的成核能力也随着界面曲率的增加而降低。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号