Pulsed electrical discharges in silicone emulsion

Camelia Miron, Mihaela Balan, Lucia Pricop, Valeria Harabagiu, Ionut Jepu, Corneliu Porosnicu, Cristian Petrica Lungu

Research output: Contribution to journalArticle

Abstract

Pulsed electrical discharges were initiated between two tungsten electrodes immersed in silicone emulsion. Optical emission spectra have shown the formation of carbon and oxygen molecules and radicals. A broad emission continuum dominated the spectrum with the increase of the discharge time due to a transition to arc plasma. Two well-distinguished and stable phases of different density were formed after the plasma treatment of the emulsion. Fourier transform infrared spectroscopy (FTIR), gel permeation chromatography (GPC), nuclear magnetic resonance spectroscopy (1H NMR) and surface tension measurements have shown that a demulsification of the silicone emulsion was achieved using this method. Pulsed electrical discharges were initiated in silicone emulsion between tungsten electrodes arranged in a rod-to-rod configuration. The reactive species formed in the discharge determined the separation of the emulsion into two phases of different density. These phases did not emulsify again to regenerate the initial emulsion.

Original languageEnglish
Pages (from-to)214-221
Number of pages8
JournalPlasma Processes and Polymers
Volume11
Issue number3
DOIs
Publication statusPublished - 2014 Mar

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Keywords

  • plasma treatment
  • polymer modification
  • pulsed discharges

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Polymers and Plastics

Cite this

Miron, C., Balan, M., Pricop, L., Harabagiu, V., Jepu, I., Porosnicu, C., & Lungu, C. P. (2014). Pulsed electrical discharges in silicone emulsion. Plasma Processes and Polymers, 11(3), 214-221. https://doi.org/10.1002/ppap.201300048