Oxone®-Mediated TEMPO-Oxidized Cellulose Nanomaterials form I and form II

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dc.contributor.authorMoore, John P. IIen
dc.contributor.authorDachavaram, Soma Shekaren
dc.contributor.authorBommagani, Shobanbabuen
dc.contributor.authorPenthala, Narsimha Reddyen
dc.contributor.authorVenkatraman, Priyaen
dc.contributor.authorFoster, Earl Johanen
dc.contributor.authorCrooks, Peter A.en
dc.contributor.authorHestekin, Jamie A.en
dc.contributor.departmentMaterials Science and Engineeringen
dc.date.accessioned2020-04-28T18:58:52Zen
dc.date.available2020-04-28T18:58:52Zen
dc.date.issued2020-04-17en
dc.date.updated2020-04-28T14:13:56Zen
dc.description.abstractThe 2,2,6,6-tetramethylpiperidin-1-oxyl (TEMPO) oxidation of cellulose, when mediated with Oxone<sup>&reg;</sup> (KHSO<sub>5</sub>), can be performed simply and under mild conditions. Furthermore, the products of the reaction can be isolated into two major components: Oxone<sup>&reg;</sup>-mediated TEMPO-oxidized cellulose nanomaterials Form I and Form II (OTO-CNM Form I and Form II). This study focuses on the characterization of the properties of OTO-CNMs. Nanoparticle-sized cellulose fibers of 5 and 16 nm, respectively, were confirmed through electron microscopy. Infrared spectroscopy showed that the most carboxylation presented in Form II. Conductometric titration showed a two-fold increase in carboxylation from Form I (800 mmol/kg) to Form II (1600 mmol/kg). OTO-CNMs showed cellulose crystallinity in the range of 64&ndash;68% and crystallite sizes of 1.4&ndash;3.3 nm, as shown through XRD. OTO-CNMs show controlled variability in hydrophilicity with contact angles ranging from 16 to 32&deg;, within or below the 26&ndash;47&deg; reported in the literature for TEMPO-oxidized CNMs. Newly discovered OTO-CNM Form II shows enhanced hydrophilic properties as well as unique crystallinity and chemical functionalization in the field of bio-sourced material and nanocomposites.en
dc.description.versionPublished versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationMoore II, J.P.; Dachavaram, S.S.; Bommagani, S.; Penthala, N.R.; Venkatraman, P.; Foster, E.J.; Crooks, P.A.; Hestekin, J.A. Oxone®-Mediated TEMPO-Oxidized Cellulose Nanomaterials form I and form II. Molecules 2020, 25, 1847.en
dc.identifier.doihttps://doi.org/10.3390/molecules25081847en
dc.identifier.urihttp://hdl.handle.net/10919/97926en
dc.language.isoenen
dc.publisherMDPIen
dc.rightsCreative Commons Attribution 4.0 Internationalen
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en
dc.subjectcelluloseen
dc.subjectnanomaterialsen
dc.subjectTEMPOen
dc.subjectoxone®en
dc.subjecthydrophilicityen
dc.subjectcrystallinityen
dc.titleOxone®-Mediated TEMPO-Oxidized Cellulose Nanomaterials form I and form IIen
dc.title.serialMoleculesen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten
dc.type.dcmitypeStillImageen

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