Reference : Combining responsiveness and durability in liquid crystal-functionalised electrospun ...
Scientific journals : Article
Engineering, computing & technology : Materials science & engineering
Physics and Materials Science
http://hdl.handle.net/10993/49460
Combining responsiveness and durability in liquid crystal-functionalised electrospun fibres with crosslinked sheath
English
Vats, Shameek mailto [University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Physics and Materials Science (DPHYMS) >]
Lagerwall, Jan mailto [University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Physics and Materials Science (DPHYMS) >]
15-Dec-2021
Liquid Crystals
Taylor & Francis
Yes (verified by ORBilu)
International
0267-8292
1366-5855
United Kingdom
[en] Liquid Crystals ; cylindrical confinement ; functional fibres ; electrospinning ; crosslinked polymers ; wearable technology
[en] Responsive functional composite fibre mats that are mechanically stable and impervious to water exposure are produced by coaxial electrospinning of thermotropic liquid crystal (LC) core inside a water-based solution of poly(vinyl alcohol) (PVA) and poly(acrylic acid) (PAA) forming the sheath. Because thermotropic LCs usually cannot be spun inside water-based solutions due to excessive interfacial tension γ, a n enabling step is the addition of ethanol or dioxane to the LC as a co-solvent compatible with both core and sheath fluids. This reduces γ sufficiently that coaxial jet spinning is possible. After spinning, thermal cross-linking of the PVA+PAA sheath yields LC-functionalised fibres that can be manipulated by hand and remain intact even upon full immersion in water. The LC core retains its behaviour, nematics showing well-aligned birefringence and transitioning to isotropic upon heating above the clearing point, and cholesterics showing selective reflection which is even enhanced upon water immersion due to the removal of sheath scattering. Our results pave the way to producing LC-functionalised responsive fibre mats using durable polymer sheaths, thereby enabling numerous innovative applications in wearable technology, and they also open new opportunities to study LCs in confinement, without visible impact of the container walls.
Researchers ; Professionals ; Students ; General public
http://hdl.handle.net/10993/49460
10.1080/02678292.2021.2005166

File(s) associated to this reference

Fulltext file(s):

FileCommentaryVersionSizeAccess
Open access
Combining responsiveness and durability in liquid crystal functionalised electrospun fibres with crosslinked sheath.pdfPublisher postprint4.15 MBView/Open
Open access
SI.pdfSI Publisher postprint2.59 MBView/Open

Additional material(s):

File Commentary Size Access
Open access
3_SI.zipSI Media18.29 MBView/Open

Bookmark and Share SFX Query

All documents in ORBilu are protected by a user license.