Micromechanics of ultra-toughened electrospun PMMA/PEO fibres as revealed by in-situ tensile testing in an electron microscope

Simple item page
dc.contributor.authorAndersson, Richard L.en_ZA
dc.contributor.authorStrom, Valteren_ZA
dc.contributor.authorGedde, Ulf W.en_ZA
dc.contributor.authorMallon, Peter E.en_ZA
dc.contributor.authorHedenqvist, Mikael S.en_ZA
dc.contributor.authorOlsson, Richard T.en_ZA
dc.date.accessioned2016-07-06T11:54:02Z
dc.date.available2016-07-06T11:54:02Z
dc.date.issued2014-09-11
dc.descriptionCITATION: Andersson, R. L. et al. 2014. Micromechanics of ultra-toughened electrospun PMMA/PEO fibres as revealed by in-situ tensile testing in an electron microscope. Scientific Reports, 4, Article number: 6335, doi:10.1038/srep06335.
dc.descriptionThe original publication is available at http://www.nature.com/srep
dc.description.abstractA missing cornerstone in the development of tough micro/nano fibre systems is an understanding of the fibre failure mechanisms, which stems from the limitation in observing the fracture of objects with dimensions one hundredth of the width of a hair strand. Tensile testing in the electron microscope is herein adopted to reveal the fracture behaviour of a novel type of toughened electrospun poly(methyl methacrylate)/poly(ethylene oxide) fibre mats for biomedical applications. These fibres showed a toughness more than two orders of magnitude greater than that of pristine PMMA fibres. The in-situ microscopy revealed that the toughness were not only dependent on the initial molecular alignment after spinning, but also on the polymer formulation that could promote further molecular orientation during the formation of micro/nano-necking. The true fibre strength was greater than 150 MPa, which was considerably higher than that of the unmodified PMMA (17 MPa). This necking phenomenon was prohibited by high aspect ratio cellulose nanocrystal fillers in the ultra–tough fibres, leading to a decrease in toughness by more than one order of magnitude. The reported necking mechanism may have broad implications also within more traditional melt–spinning research.en_ZA
dc.description.urihttp://www.nature.com/articles/srep06335
dc.description.versionPublisher's version
dc.format.extent8 pages
dc.identifier.citationAndersson, R. L. et al. 2014. Micromechanics of ultra-toughened electrospun PMMA/PEO fibres as revealed by in-situ tensile testing in an electron microscope. Scientific Reports, 4, Article number: 6335, doi:10.1038/srep06335.
dc.identifier.issn2045-2322 (online)
dc.identifier.issn2045-2322 (print)
dc.identifier.otherdoi:10.1038/srep06335
dc.identifier.urihttp://hdl.handle.net/10019.1/99095
dc.language.isoen_ZAen_ZA
dc.publisherNature Publishing Group
dc.rights.holderAuthors retain copyright
dc.subjectMicromechanicsen_ZA
dc.subjectElectrospun PMMA/PEO fibresen_ZA
dc.subjectFibers -- Toughnessen_ZA
dc.subjectPolymethylmethacrylateen_ZA
dc.subjectElectron microscopesen_ZA
dc.subjectElectrospinningen_ZA
dc.titleMicromechanics of ultra-toughened electrospun PMMA/PEO fibres as revealed by in-situ tensile testing in an electron microscopeen_ZA
dc.typeArticleen_ZA
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
andersson_micromechanics_2014.pdf
Size:
3.7 MB
Format:
Adobe Portable Document Format
Description:
Download article
Download
License bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
license.txt
Size:
1.95 KB
Format:
Item-specific license agreed upon to submission
Description:
Download
Collections
Research Articles (Chemistry and Polymer Science)