.
                   on-line      

 SCF-TP on-line  

2018, N1, pp. 77-85

K.A. Tatarenko, P.A. Tatarenko, S.A. Chernyak, A.V. Lazarev

CoilGlobule Transition During the Microencapsulation of TiO2 Nanoparticles in the Jet of Supercritical CO2

The process of microencapsulation of titanium dioxide nanoparticles in polyethylene glycol PEG 8000 at pulse expanding of the jets of polymer solution in supercritical carbon dioxide in vacuum and in a background gas (helium) is experimentally studied. In both cases, at given initial temperature and cosolvent (ethanol) concentration the distance from the nozzle exit to the point of coilglobule transition on the jet axis is determined using the electron microscopy data. The dependence of the transition point position on the initial temperature and the concentration of ethanol in the reactor is obtained.

Key words: supercritical carbon dioxide, microencapsulation, pulsed supersonic jet, TiO2 nanoparticles

RIS


   © 2006-2007 ""