Show simple item record

dc.contributor.author
Hausmann, Michael K.
dc.contributor.author
Rühs, Patrick A.
dc.contributor.author
Siqueira, Gilberto
dc.contributor.author
Läuger, Jörg
dc.contributor.author
Libanori, Rafael
dc.contributor.author
Zimmermann, Tanja
dc.contributor.author
Studart, André R.
dc.date.accessioned
2020-12-15T08:49:42Z
dc.date.available
2018-08-06T18:23:12Z
dc.date.available
2018-08-07T12:05:51Z
dc.date.available
2020-05-13T15:55:09Z
dc.date.available
2020-05-14T06:33:49Z
dc.date.available
2020-05-25T07:21:55Z
dc.date.available
2020-12-08T10:45:22Z
dc.date.available
2020-12-15T08:49:42Z
dc.date.issued
2018-07-24
dc.identifier.issn
1936-0851
dc.identifier.issn
1936-086X
dc.identifier.other
10.1021/acsnano.8b02366
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/280883
dc.description.abstract
The alignment of anisotropic particles during ink deposition directly affects the microstructure and properties of materials manufactured by extrusion-based 3D printing. Although particle alignment in diluted suspensions is well described by analytical and numerical models, the dynamics of particle orientation in the highly concentrated inks typically used for printing via direct ink writing (DIW) remains poorly understood. Using cellulose nanocrystals (CNCs) as model building blocks of increasing technological relevance, we study the dynamics of particle alignment under the shear stresses applied to concentrated inks during DIW. With the help of in situ polarization rheology, we find that the time period needed for particle alignment scales inversely with the applied shear rate and directly with the particle concentration. Such dependences can be quantitatively described by a simple scaling relation and qualitatively interpreted in terms of steric and hydrodynamic interactions between particles at high shear rates and particle concentrations. Our understanding of the alignment dynamics is then utilized to estimate the effect of shear stresses on the orientation of particles during the printing process. Finally, proof-of-concept experiments show that the combination of shear and extensional flow in 3D printing nozzles of different geometries provides an effective means to tune the orientation of CNCs from fully aligned to core–shell architectures. These findings offer powerful quantitative guidelines for the digital manufacturing of composite materials with programmed particle orientations and properties.
en_US
dc.language.iso
en
en_US
dc.publisher
American Chemical Society
en_US
dc.subject
cellulose nanocrystals
en_US
dc.subject
rheology
en_US
dc.subject
polarized light
en_US
dc.subject
alignment
en_US
dc.subject
3D printing
en_US
dc.subject
birefringence
en_US
dc.subject
shear stress
en_US
dc.subject
direct ink writing
en_US
dc.title
Dynamics of Cellulose Nanocrystal Alignment during 3D Printing
en_US
dc.type
Journal Article
dc.date.published
2018-07-05
ethz.journal.title
ACS Nano
ethz.journal.volume
12
en_US
ethz.journal.issue
7
en_US
ethz.journal.abbreviated
ACS Nano
ethz.pages.start
6926
en_US
ethz.pages.end
6937
en_US
ethz.grant
3D Printing of Heterogeneous Bioinspired Composites
en_US
ethz.grant
Hierarchisch strukturierte zellulose-basierte Komposite
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.publication.place
Columbus, OH
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02160 - Dep. Materialwissenschaft / Dep. of Materials::03831 - Studart, André R. / Studart, André R.
en_US
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02160 - Dep. Materialwissenschaft / Dep. of Materials::03831 - Studart, André R. / Studart, André R.
ethz.grant.agreementno
157696
ethz.grant.agreementno
159906
ethz.grant.fundername
SNF
ethz.grant.fundername
SNF
ethz.grant.funderDoi
10.13039/501100001711
ethz.grant.funderDoi
10.13039/501100001711
ethz.grant.program
SNSF Consolidator Grants 2014
ethz.grant.program
Projekte MINT
ethz.date.deposited
2018-08-06T18:23:15Z
ethz.source
SCOPUS
ethz.eth
yes
en_US
ethz.availability
Metadata only
en_US
ethz.rosetta.installDate
2018-08-07T12:05:55Z
ethz.rosetta.lastUpdated
2022-03-29T04:35:22Z
ethz.rosetta.versionExported
true
ethz.COinS
ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.atitle=Dynamics%20of%20Cellulose%20Nanocrystal%20Alignment%20during%203D%20Printing&rft.jtitle=ACS%20Nano&rft.date=2018-07-24&rft.volume=12&rft.issue=7&rft.spage=6926&rft.epage=6937&rft.issn=1936-0851&1936-086X&rft.au=Hausmann,%20Michael%20K.&R%C3%BChs,%20Patrick%20A.&Siqueira,%20Gilberto&L%C3%A4uger,%20J%C3%B6rg&Libanori,%20Rafael&rft.genre=article&rft_id=info:doi/10.1021/acsnano.8b02366&
 Search print copy at ETH Library

Files in this item

FilesSizeFormatOpen in viewer

There are no files associated with this item.

Publication type

Show simple item record