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- W2000666541 abstract "Improved moisture stability is desired in cellulose biocomposites. In order to clarify nanostructural effects, a new approach is presented where water and polymer matrix mobilities are characterized separately. Nanocomposites from cellulose nanofibers (CNF) in the xyloglucan (XG) biopolymer matrix are investigated at different hydration states. Films of XG, CNF, and CNF/XG composites are subjected to detailed 2H and 13C NMR relaxation studies. Since the 2H NMR signal arises from heavy water and the 13C signal from the polysaccharides, molecular water and polymer dynamics is for the first time investigated separately. In the neat components, 2H transverse relaxation (T2) data are consistent with water clustering at the CNF fibril surfaces, but bulk spread of moisture in XG. The new method results in a description of water interaction with the nanoscale phases. At low hydration, water molecules at the CNF/XG interface exhibit higher water mobility than in neat CNF or XG, due to locally high water concentration. At the same time, CNF-associated interphase segments of XG show slower NMR-dynamics than that in neat XG." @default.
- W2000666541 created "2016-06-24" @default.
- W2000666541 creator A5035588660 @default.
- W2000666541 creator A5040285392 @default.
- W2000666541 creator A5061981173 @default.
- W2000666541 creator A5084347517 @default.
- W2000666541 date "2015-04-17" @default.
- W2000666541 modified "2023-10-03" @default.
- W2000666541 title "Nanostructural Effects on Polymer and Water Dynamics in Cellulose Biocomposites: <sup>2</sup>H and <sup>13</sup>C NMR Relaxometry" @default.
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- W2000666541 doi "https://doi.org/10.1021/acs.biomac.5b00330" @default.
- W2000666541 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/25853702" @default.
- W2000666541 hasPublicationYear "2015" @default.
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