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High Pressure for Dispersing and Deagglomerating Nanoparticles in Aqueous Solutions
Author(s) -
Sauter C.,
Schuchmann H. P.
Publication year - 2007
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.200700115
Subject(s) - van der waals force , nozzle , nanoparticle , aqueous solution , materials science , coating , dispersion (optics) , polymer , chemical engineering , sintering , dispersant , particle (ecology) , nanotechnology , composite material , chemistry , molecule , mechanical engineering , organic chemistry , physics , oceanography , optics , geology , engineering
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.