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Synthesis and structure property relationships of ionic liquid-functionalized cellulose materials
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Freeman, Laura Ann. Synthesis and structure property relationships of ionic liquid-functionalized cellulose materials. Retrieved from https://doi.org/doi:10.7282/t3-9z69-mq60

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TitleSynthesis and structure property relationships of ionic liquid-functionalized cellulose materials
NameFreeman, Laura Ann (author); Salas-de la Cruz, David (chair); Roche, Alex J (member); Miller, Kevin M (member); Rutgers University; Graduate School - Camden
Date Created2023
Other Date2023-01 (degree)
SubjectChemistry, Environmental science, Morphology, Cellulose, Energy, Glass transition temperature, Ionic conductivity, Poly (ionic-liquids), Triazolium
Extent160 pages : illustrations
DescriptionCellulose is an abundant, bio renewable material with tunable properties that allow for its potential use in many applications. It’s crystalline structure with inter-molecular and intra-molecular hydrogen bonds make it basically insoluble in water and many common organic solvents, making it an excellent choice as a structural engineering material. Ionic liquids can be utilized as a solvent not only to dissolve cellulose but also to functionalize it. In this study, a variety of 1,2,3-triazolium-functionalized cellulose derivatives were prepared where their alkyl chain length, counter anions and degrees of substitution were varied to investigate their structure/property relationships. Special attention was placed on thermal and conductivity changes as it was hypothesized that the materials synthesized with the longer alkyl chains would exhibit an increase in backbone-backbone spacing that would effectively lower the glass transition temperature (Tg) of the materials, improving their ion movement and ionic conductivity. A variety of characterization tests were used for this investigation including Fourier transform infrared spectroscopy (FTIR), thermal gravimetric analysis (TGA), differential scanning calorimetry (DSC), nuclear magnetic resonance spectroscopy (NMR), X-ray scattering, dielectric relaxation spectroscopy (DRS) and elemental analysis. The results demonstrate a correlation between increased alkyl chain length and backbone-backbone spacing but this did not always translate to an improvement in ion mobility or ionic conductivity. Samples produced within each alkyl set did however show an increase in conductivity as the bulkier, more non-coordinating anions were introduced providing further evidence that the counter anion size is a driving force in ionic conductivity.
NoteM.S.
NoteIncludes bibliographical references
Genretheses
Persistent URLhttps://doi.org/doi:10.7282/t3-9z69-mq60
LanguageEnglish
CollectionCamden Graduate School Electronic Theses and Dissertations
Organization NameRutgers, The State University of New Jersey
RightsThe author owns the copyright to this work.
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