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Reactivity of fatty acid methyl esters under atmospheric pressure plasma jet exposure: An experimental and theoretical study
Author(s) -
Martini Luca Matteo,
Maranzana Andrea,
Tonachini Glauco,
Bortolotti Giulia,
Scapinello Marco,
Scotoni Mario,
Guella Graziano,
Dilecce Giorgio,
Tosi Paolo
Publication year - 2017
Publication title -
plasma processes and polymers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.644
H-Index - 74
eISSN - 1612-8869
pISSN - 1612-8850
DOI - 10.1002/ppap.201600254
Subject(s) - chemistry , reactivity (psychology) , jet (fluid) , atmospheric pressure , fatty acid , photochemistry , plasma , fluorescence , polymerization , hydroxyl radical , organic chemistry , radical , polymer , medicine , oceanography , physics , alternative medicine , pathology , quantum mechanics , thermodynamics , geology
We have investigated the treatment of a mixture of fatty acid methyl esters by an RF‐plasma jet with He‐H 2 O and He‐O 2 gas feed. We have measured the concentration of the hydroxyl radical in the jet by laser induced fluorescence, looking for correlation with the lipid reactivity. We have detected four product families, whose yields increase with the OH exposure: volatile products, polymerization products, reduced chains, and oxidized chains. Theoretical calculations give insights on the radical attack to the lipid chain and show that none of the products can be attributed exclusively to reactions with OH. Therefore, the observed reactant conversion as function of the OH exposure must be interpreted as a qualitative relationship with the total amount of radical species present in the plasma jet. PACS : 52.80.Tn, 82.33.Xj, 31.15.E‐.