Carbon nanofibers synthesized from electrospun cellulose

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dc.contributor.authorKuzmenko, Volodymyr
dc.contributor.departmentChalmers tekniska högskola / Institutionen för mikroteknologi och nanovetenskapsv
dc.contributor.departmentChalmers University of Technology / Department of Microtechnology and Nanoscienceen
dc.date.accessioned2019-07-03T12:50:49Z
dc.date.available2019-07-03T12:50:49Z
dc.date.issued2012
dc.description.abstractCarbon nanofibers (CNFs) have several properties that make them attractive for electronic devices, filtration membranes, tissue engineering scaffolds, composites (reinforcement agents), or catalyst carriers. Exploitation of renewable resources such as cellulosic materials can help to supply all these expanding demands. Synthesis of carbon nanofibrous materials with controlled properties by carbonization of electrospun cellulose was performed in the present work. At the first step fine fibers were fabricated by electrospinning of cellulose acetate solution, they were subsequently regenerated to cellulose in various conditions and, finally, carbonized. Scanning electron microscopy (SEM) and x-ray diffraction (XRD) showed that carbonization of electrospun cellulose (EC) at 800 -1000 °C led to the formation of amorphous granular carbon nanofibers with diameters of 20-150 nm, controlled electrical conductivity (3.8 – 17.0 S/cm) and wettability (water contact angle is 55 – 120°). Our analysis shows that the structure and properties of the resulting CNFs are influenced by deacetylation conditions and temperature of carbonization. XRD patterns illustrate different crystallinity indexes (CI) in different cases of deacetylation. Cellulose samples with sufficiently high CI are appropriate precursors for CNF synthesis.
dc.identifier.urihttps://hdl.handle.net/20.500.12380/159643
dc.language.isoeng
dc.setspec.uppsokPhysicsChemistryMaths
dc.subjectNFL/Myfab (Nanofabrication Laboratory)
dc.subjectMaterialvetenskap
dc.subjectNanovetenskap och nanoteknik
dc.subjectÖvrig teknisk materialvetenskap
dc.subjectNFL/Myfab (Nanofabrication Laboratory)
dc.subjectMaterials Science
dc.subjectNanoscience & Nanotechnology
dc.subjectOther materials science
dc.titleCarbon nanofibers synthesized from electrospun cellulose
dc.type.degreeExamensarbete för masterexamensv
dc.type.degreeMaster Thesisen
dc.type.uppsokH
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