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231225s2021 xx |||||o 00| ||eng c |
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|a 10.1021/acs.langmuir.0c02336
|2 doi
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|a pubmed24n1073.xml
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|a DE-627
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|e rakwb
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|a eng
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| 100 |
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|a Oguzlu, Hale
|e verfasserin
|4 aut
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|a Polymer Induced Gelation of Aqueous Suspensions of Cellulose Nanocrystals
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|c 2021
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
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|2 rdamedia
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|a ƒa Online-Ressource
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|a Date Completed 23.03.2021
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|a Date Revised 23.03.2021
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a We investigated the gelation of cellulose nanocrystals (CNCs) in polyelectrolyte and neutral polymer solutions. Cellulose nanocrystals (CNCs) with half-ester sulfate groups produced by acid hydrolysis of wood pulp were used in this study. The microstructure of CNCs/polymer suspensions was investigated in semidilute concentration regimes by selecting carboxymethyl cellulose (CMC700) as an anionic polymer and poly(ethylene oxide) (PEO600) as a neutral polymer solution. Together with quartz crystal microbalance with dissipation monitoring (QCM-D), rheology, scanning electron microscopy (SEM), and cryo-transmission electron microscopy (cryo-TEM), we characterized CNCs-polymer interactions, the suspension microstructure, and the macroscopic gel flow. Significant viscosity increases at low shear rates coupled with high shear-thinning behaviors were observed in CNC colloid-CMC700 polymer mixtures, but not those CNCs in PEO600 solutions. The apparent differences between CNCs-CMC700 and CNCs-PEO600 mixtures were due to their chain confirmations. On the basis of the evaluations from STEM, cryo-TEM, and polarized optical microscopy, we proposed that the excess CMC700 molecules in solutions result in the depletion of CNCs and the formation of anisotropic domains
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a Dobyrden, Illia
|e verfasserin
|4 aut
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|a Liu, Xiaoyan
|e verfasserin
|4 aut
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|a Bhaduri, Swayamdipta
|e verfasserin
|4 aut
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|a Claesson, Per Martin
|e verfasserin
|4 aut
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|a Boluk, Yaman
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1992
|g 37(2021), 10 vom: 16. März, Seite 3015-3024
|w (DE-627)NLM098181009
|x 1520-5827
|7 nnns
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| 773 |
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|g volume:37
|g year:2021
|g number:10
|g day:16
|g month:03
|g pages:3015-3024
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|u http://dx.doi.org/10.1021/acs.langmuir.0c02336
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