High Pressure for Dispersing and Deagglomerating Nanoparticles in Aqueous Solutions
High Pressure for Dispersing and Deagglomerating Nanoparticles in Aqueous Solutions
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DOI：
10.1002/ceat.200700115
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发表时间：
2007-10
影响因子：
2.1
通讯作者：
Caroline Sauter;H. Schuchmann
中科院分区：
文献类型：
--
作者：
Caroline Sauter;H. Schuchmann
将颗粒分散在溶液中是多种工业产品和过程的关键要求，包括涂料应用中的颜料或聚合物中的填充物。为了在成品中具有高功能，纳米颗粒必须精细和均匀分散。由于纳米颗粒通常由于范德华相互作用和烧结键而高度聚集，因此必须在组成粒子上施加高应力。高压分散是一种有希望的新技术，用于降低和减少过程的时间和能量。考虑到导致骨料中断的不同机制的影响，均质压力和喷嘴几何形状是关键过程参数。因此，调整喷嘴几何形状可以导致分散效率的有针对性提高。
Dispersing particles in a solution is a key requirement for a great variety of industrial products and processes, including pigments in coating applications or fillers in polymers. To be highly functional in the finished product, nanoparticles are required to be finely and homogeneously dispersed. As nanoparticles are often highly aggregated due to van der Waals interactions and sintering bonds, high stresses must be exerted on the constituent particles. High pressure dispersion is a promising new technology for deagglomerating and reducing process time and energy. Taking account of the influence of different mechanisms causing aggregate disruption, homogenizing pressure and nozzle geometry are the key process parameters. Therefore, adapting the nozzle geometry can lead to a targeted improvement of dispersion efficiency.