Characterization of synthetic and commercial trisiloxane surfactant materials

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dc.contributor.authorBonnington, L. S.
dc.contributor.authorHenderson, William
dc.contributor.authorZabkiewicz, J. A.
dc.date.accessioned2009-12-02T01:43:31Z
dc.date.available2009-12-02T01:43:31Z
dc.date.issued2004
dc.description.abstractThe organosilicone surfactant Silwet L-77® (L-77), used as an agrochemical adjuvant, is a mixture comprised predominantly of [(CH₃)₃SiO]₂ (CH₃)Si (CH₂)₃ (OCH₂CH₂)n OCH₃ oligomers (n = 3-16, average n 7.5). The commercially available L-77 mixture was purified by reversed-phase high-performance liquid chromatography (HPLC) to obtain individual trisiloxane surfactant components. Pure oligomers (n = 3, 6 and 9) were also synthesized. Synthesis was achieved by hydrosilylation of monomeric ethoxylate monomethyl ether starting reagents. Pure hexa- and nona-ethylene glycols were produced by condensation of smaller oligomers. Atmospheric-pressure ionization mass spectrometry (MS) methods were used to characterize fully the commercial L-77 product and synthesized or isolated components. The application of Fourier-transform ion cyclotron resonance MS and online HPLC-electrospray ionization MS techniques to the analysis of this surfactant are described here. The application of these analytical techniques also enabled elucidation of the synthetic by-products present in the commercial formulation.en
dc.identifier.citationBonnington, L. S., Henderson, W., & Zabkiewicz, J. A. (2004). Characterization of synthetic and commercial trisiloxane surfactant materials. Applied Organometallic Chemistry, 18(1), 28-38.en
dc.identifier.doi10.1002/aoc.563en
dc.identifier.urihttps://hdl.handle.net/10289/3450
dc.language.isoen
dc.publisherJohn Wiley & Sons Ltd.en_NZ
dc.relation.isPartOfApplied Organometallic Chemistryen_NZ
dc.rightsJohn Wiley & Sons, Ltd.en
dc.subjectorganosilicone surfactanten
dc.subjecttrisiloxane surfactanten
dc.subjectatmospheric-pressure chemical ionization massen
dc.subjectspectrometryen
dc.subjectphysical propertiesen
dc.titleCharacterization of synthetic and commercial trisiloxane surfactant materialsen
dc.typeJournal Articleen
pubs.begin-page28en_NZ
pubs.elements-id29817
pubs.end-page38en_NZ
pubs.issue1en_NZ
pubs.volume18en_NZ
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