arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1503.00476cond-mat.soft
收藏

双连续Pickering乳液形成过程中的粒径效应

Particle-Size Effects in the Formation of Bicontinuous Pickering Emulsions

M. Reeves, A. T. Brown, A. B. Schofield, M. E. Cates, J. H. J. Thijssen

摘要:

我们证明,形成的双连续乳液稳定的界面粒子(bijels)是更强大的纳米粒子,而不是微粒时使用。在几乎中性润湿颗粒存在下,通过旋节线分层的乳化通过快速加热诱导。使用共聚焦显微镜,我们表明,纳米球允许成功的bijel形成在加热速率两个数量级慢于可能与微球。为了解释我们的结果,我们引入了机械回旋余地的概念,即纳米颗粒受益于较小的驱动力,朝向破坏性曲率。最后,我们建议,回旋机制可能有利于任何配方中出现的挑战,由于严格的限制,关键参数,但限制可以放宽合理地改变一个更容易获得的参数的值。

英文摘要:

We demonstrate that the formation of bicontinuous emulsions stabilized by interfacial particles (bijels) is more robust when nanoparticles rather than microparticles are used. Emulsification via spinodal demixing in the presence of nearly neutrally wetting particles is induced by rapid heating. Using confocal microscopy, we show that nanospheres allow successful bijel formation at heating rates two orders of magnitude slower than is possible with microspheres. In order to explain our results, we introduce the concept of mechanical leeway i.e. nanoparticles benefit from a smaller driving force towards disruptive curvature. Finally, we suggest that leeway mechanisms may benefit any formulation in which challenges arise due to tight restrictions on a pivotal parameter, but where the restrictions can be relaxed by rationally changing the value of a more accessible parameter.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑