Сверхкритические флюиды. Теория и практика
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2014, N3, pp. 66-72

K.A. Tatarenko, A.V. Lazarev, D.N. Trubnikov

Microcapsulation of titanium dioxide nanoparticles during the expansion of pulsed supersonic jet of supercritical solution into background gas

The formation of microcapsules with a nano-sized TiO2 core in a shell from poly(ethylene glycol) is studied. The microcapsules are formed during the expansion of pulsed supersonic jet of TiO2 suspension in supercritical solution of poly(ethylene glycol) (PEG 8000) in CO2 into the chamber containing a background gas (He) (duration of impulse — 400 μs). The effect of the background gas pressure in the expansion chamber onto the size microcapsules and their structure is investigated. The upper and lower limits of the background gas pressure within which microcapsules with a relatively high content of TiO2 nanoparticles are determined.

Key words: pulsed supersonic jet, formation of microcapsules, TiO2 nanoparticles

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