No full text
Article (Scientific journals)
Continuous Flow Microfluidic Production of Arbitrarily Long Tubular Liquid Crystal Elastomer Peristaltic Pump Actuators
Najiya, Najiya; Popov, Nikolay; Jampani, Venkata Subba Rao et al.
2022In Small, p. 2204693
Peer Reviewed verified by ORBi
 

Files


Full Text
No document available.
Full Text Parts
Cont. flow micr. prod. of arb. long tubular LCE per. pump actuators _ N.Najiya, N.Popov, V.S.R.Jampani, J.P.F.Lagerwall.pdf
Publisher postprint (2.88 MB)
Article
Request a copy
Cont. flow micr. prod. of arb. long tubular LCE per. pump actuators _ sup. _ N.Najiya, N.Popov, V.S.R.Jampani, J.P.F.Lagerwall.pdf
Author postprint (2.76 MB)
Supplementary information
Download

All documents in ORBilu are protected by a user license.

Send to



Details



Keywords :
interface stabilization; liquid crystal elastomer actuators; negative order parameter; nested capillary microfluidics; tubular coaxial flow
Abstract :
[en] While liquid crystal elastomers (LCEs) are ideal materials for soft-robotic actuators, filling the role of muscle and shape-defining material simultaneously, it is non-trivial to give them ground state shapes beyond simple sheets or fibers. Here tubular LCE actuators scalable to arbitrary length are produced using a continuous three-phase coaxial flow microfluidic process. By pumping an oligomeric precursor solution between inner and outer aqueous phases in a cylindrically symmetric nested capillary set-up, and by reducing the interfacial tension to negligible values using surfactants adapted to each phase, the tubular liquid flow is stabilized over distances more than 200 times the diameter or 2000 times the thickness. In situ photocrosslinking of the middle phase turns it into an LCE network that is flow-aligned by the shear gradient over the phase. The reversible actuation of the tubes upon heating yields a reduction of the interior space, pumping out enclosed fluid, and the relaxation upon cooling leads to the fluid being sucked back in. By moving a local heat source along the tube, it acts as a peristaltic pump. It is proposed that the tubes could, pending functionalization for light-triggered actuation, function as active synthetic vasculature in biological contexts.
Disciplines :
Physical, chemical, mathematical & earth Sciences: Multidisciplinary, general & others
Author, co-author :
Najiya, Najiya  ;  University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Physics and Materials Science (DPHYMS)
Popov, Nikolay  ;  University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Physics and Materials Science (DPHYMS)
Jampani, Venkata Subba Rao;  University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Physics and Materials Science (DPHYMS) ; Jozef Stefan Institute, Jamova 39, Ljubljana, 1000 Slovenia > Department of Condensed Matter Physics
Lagerwall, Jan  ;  University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Physics and Materials Science (DPHYMS)
 These authors have contributed equally to this work.
External co-authors :
yes
Language :
English
Title :
Continuous Flow Microfluidic Production of Arbitrarily Long Tubular Liquid Crystal Elastomer Peristaltic Pump Actuators
Publication date :
09 December 2022
Journal title :
Small
ISSN :
1613-6829
Publisher :
John Wiley and Sons, Weinheim, Germany
Pages :
2204693
Peer reviewed :
Peer Reviewed verified by ORBi
Focus Area :
Physics and Materials Science
European Projects :
H2020 - 648763 - INTERACT - Intelligent Non-woven Textiles and Elastomeric Responsive materials by Advancing liquid Crystal Technology
Funders :
University of Luxembourg - UL
CE - Commission Européenne [BE]
Available on ORBilu :
since 17 January 2023

Statistics


Number of views
104 (40 by Unilu)
Number of downloads
28 (9 by Unilu)

Scopus citations®
 
1
Scopus citations®
without self-citations
1
WoS citations
 
1

Bibliography


Similar publications



Contact ORBilu