Publication:
Effect of core-to-shell flowrate ratio on morphology, crystallinity, mechanical properties and wettability of poly(lactic acid) fibers prepared via modified coaxial electrospinning

Simple item page
cris.author.scopus-author-id 55550154100
cris.author.scopus-author-id 15839194300
cris.author.scopus-author-id 23668308200
cris.author.scopus-author-id 35797042800
dc.contributor.author Abdullah M.F.
dc.contributor.author Andriyana A.
dc.contributor.author Muhamad F.
dc.contributor.author Ang B.C.
dc.date.accessioned 2024-09-27T01:26:40Z
dc.date.available 2024-09-27T01:26:40Z
dc.date.issued 2021-12-10
dc.description.abstract In this study, modified coaxial electrospinning (CE) was employed to improve electrospinnability and to tailor surface morphology and bead formation of poly(lactic acid) (PLA) fibers by means of core-to-shell flowrate ratio variation. Chloroform/N,N-dimethylformamide (DMF) mixture was used as sheath solution which serves as a protective layer to prevent rapid solidification of PLA droplet causing needle clogging. Five different core-to-shell flowrate ratios yielded beads-on-a-string PLA fibers with distinctive fiber and bead properties. These diverse morphologies were characterized in terms of fiber diameter (Df), fiber percentage (Pf), number of beads per area (nb), bead area (Ab), bead aspect ratio (Lb/Db), ratio of bead-to-fiber diameter (Db/Df) and surface roughness. From thermal analysis, crystallinity of PLA fibers was shown to be significantly dependent on the fiber processing history, where higher degree of molecular chain orientation and longer jet flight time correspond to higher crystallinity values. Core-to-shell flowrate ratio of 1:3 resulted in PLA fibers with the least nb, smallest Db/Df and highest Lb/Db (spindle-like shape), which correspond to the highest tensile properties and minimum hydrophobicity among beads-on-a-string fibers studied, as indicated by effective stress-strain curve and water contact angle measurement. Furthermore, the results suggested that Db/Df was the dominant factor affecting tensile properties more than the effect of crystallinity, while Lb/Db (bead shape) was the key aspect which influenced the wettability of the PLA beads-on-a-string fibers.
dc.identifier.doi 10.1016/j.polymer.2021.124378
dc.identifier.scopus 2-s2.0-85119532810
dc.identifier.uri https://hdl.handle.net/20.500.14170/4106
dc.relation.funding Ministry of Higher Education, Malaysia
dc.relation.grantno FP048-2019A
dc.relation.ispartof Polymer
dc.relation.ispartofseries Polymer
dc.relation.issn 00323861
dc.subject Beads-on-a-string | Clogging | Modified coaxial electrospinning | Morphology | Poly(lactic acid)
dc.title Effect of core-to-shell flowrate ratio on morphology, crystallinity, mechanical properties and wettability of poly(lactic acid) fibers prepared via modified coaxial electrospinning
dc.type Journal
dspace.entity.type Publication
oaire.citation.volume 237
oairecerif.affiliation.orgunit Universiti Malaya
oairecerif.affiliation.orgunit Universiti Malaya
oairecerif.affiliation.orgunit Universiti Malaya
oairecerif.affiliation.orgunit Universiti Malaya
oairecerif.citation.number 124378
person.identifier.orcid 0000-0002-4921-2181
person.identifier.orcid #PLACEHOLDER_PARENT_METADATA_VALUE#
person.identifier.orcid #PLACEHOLDER_PARENT_METADATA_VALUE#
person.identifier.orcid #PLACEHOLDER_PARENT_METADATA_VALUE#
person.identifier.scopus-author-id 55550154100
person.identifier.scopus-author-id 15839194300
person.identifier.scopus-author-id 23668308200
person.identifier.scopus-author-id 35797042800
Files
Collections
Publications 2021