通过毛细流动制备微纳粒子

回顾了若干能够将流体交界面拉伸至微米及更小尺度的毛细流动.这些流动类型已经成为制备单分散性微-纳粒子技术的基础. 这些技术正引起人们的关注, 它们既能制造简单结构的粒子,也能制造核-壳结构的粒子(微纳胶囊、同轴纳米纤维以及中空纳米纤维),而且能够精确地控制粒子的平均尺寸.本文还评述了流动的基本物理以及控制这些毛细流动的无量纲参数. 此外,文中还给出一些实例, 介绍利用几种装置制备的不同类型粒子.

MICRO- AND NANOPARTICLES VIA CAPILLARY FLOWS

This review surveyssome capillary flows capable of stretching fluid interfaces downto the micrometric dimension and below. These types of flows havebecome the basis for attractive techniques to produce monodispersemicro- and nanoparticles with either simple or core-shellstructure (micro- and nanocapsules, coaxial nanofibers, and hollownanofibers). These techniques enable precise control on theparticle mean size. We also review the basic physics of the flowand the dimensionless parameters that govern these capillaryflows. Some examples of the types of particles produced by a fewdevices are also presented.