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231224s2016 xx |||||o 00| ||eng c |
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|a 10.1021/acs.langmuir.6b01827
|2 doi
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|a pubmed24n0874.xml
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|a (NLM)27407001
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|a DE-627
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|e rakwb
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| 041 |
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|a eng
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| 100 |
1 |
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|a De France, Kevin J
|e verfasserin
|4 aut
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| 245 |
1 |
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|a Cooperative Ordering and Kinetics of Cellulose Nanocrystal Alignment in a Magnetic Field
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|c 2016
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
|b cr
|2 rdacarrier
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| 500 |
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|a Date Completed 30.05.2018
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|a Date Revised 30.05.2018
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a Cellulose nanocrystals (CNCs) are emerging nanomaterials that form chiral nematic liquid crystals above a critical concentration (C*) and additionally orient within electromagnetic fields. The control over CNC alignment is significant for materials processing and end use; to date, magnetic alignment has been demonstrated using only strong fields over extended or arbitrary time scales. This work investigates the effects of comparatively weak magnetic fields (0-1.2 T) and CNC concentration (1.65-8.25 wt %) on the kinetics and degree of CNC ordering using small-angle X-ray scattering. Interparticle spacing, correlation length, and orientation order parameters (η and S) increased with time and field strength following a sigmoidal profile. In a 1.2 T magnetic field for CNC suspensions above C*, partial alignment occurred in under 2 min followed by slower cooperative ordering to achieve nearly perfect alignment in under 200 min (S = -0.499 where S = -0.5 indicates perfect antialignment). At 0.56 T, nearly perfect alignment was also achieved, yet the ordering was 36% slower. Outside of a magnetic field, the order parameter plateaued at 52% alignment (S = -0.26) after 5 h, showcasing the drastic effects of relatively weak magnetic fields on CNC alignment. For suspensions below C*, no magnetic alignment was detected
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|a Journal Article
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4 |
|a Research Support, U.S. Gov't, Non-P.H.S.
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| 700 |
1 |
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|a Yager, Kevin G
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Hoare, Todd
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Cranston, Emily D
|e verfasserin
|4 aut
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| 773 |
0 |
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|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1999
|g 32(2016), 30 vom: 02. Aug., Seite 7564-71
|w (DE-627)NLM098181009
|x 1520-5827
|7 nnns
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| 773 |
1 |
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|g volume:32
|g year:2016
|g number:30
|g day:02
|g month:08
|g pages:7564-71
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| 856 |
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|u http://dx.doi.org/10.1021/acs.langmuir.6b01827
|3 Volltext
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