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Cellulose Nanoparticles: Structure-Morphology-Rheology Relationships

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WOS被引频次:86
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成果类型:
期刊论文
作者:
Li, Mei-Chun;Wu, Qinglin;Song, Kunlin;Lee, Sunyoung;Qing, Yan;Wu, Yiqiang
通讯作者:
Wu, QL
作者机构:
[Lee, Sunyoung] Department of Forest Products, Korea Forest Research Institute, Seoul, Korea, Republic of
[Qing, Yan; Wu, Yiqiang] College of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha, China
[Song, Kunlin; Wu, Qinglin; Li, Mei-Chun] School of Renewable Natural Resources, Louisiana State University AgCenter, Baton Rouge
[Song, Kunlin; Wu, Qinglin; Li, Mei-Chun] LA, United States
LA, United States
通讯机构:
[Wu, QL] Louisiana State Univ, AgCenter, Sch Renewable Nat Resources, Baton Rouge, LA 70803 USA.
语种:
英文
关键词:
Cellulose nanofibers;Cellulose nanocrystals;Structure;Rheological properties;Aspect ratio
期刊:
ACS Sustainable Chemistry and Engineering
ISSN:
2168-0485
年:
2015
卷:
3
期:
5
页码:
821-832
文献类别:
WOS:Article;EI:Journal article (JA)
所属学科:
ESI学科类别:化学;WOS学科类别:Chemistry, Multidisciplinary;Engineering, Chemical;GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY
入藏号:
WOS:000354072700006;EI:20152100878154
基金类别:
Louisiana Board of Regents [LEQSF-EPS (2014)-OPT-IN-37, LEQSF(2013-14)-ENH-TR-02]; Central South University of Forestry and Technology, Changsha, China; Collaborative Innovation Center of Biomass Energy of Henan Province, Henan Agricultural University, Zhengzhou, China
机构署名:
本校为其他机构
院系归属:
材料科学与工程学院
摘要:
The present study aims to investigate the structure-morphology-rheology relationships for cellulose nanoparticles (CNPs), including cellulose nanofibers (CNFs) and cellulose nanocrystals (CNCs). CNCs were extracted from never dried CNFs using sulfuric acid with controlled hydrolysis time. The crystalline structure, surface charge, morphology, and rheological behavior of the CNPs were measured and contrasted. The CNF suspensions exhibited rigid solid-like viscoelastic behavior even at a low concentration due to the formation of a highly entangled network. Upon acid hydrolysis, the network of rigid, long, and highly entangled nanofibers was eliminated, resulting in a significant loss of viscoelastic properties. Both steady-state and dynamic rheological measurements showed that the rheological behavior of the CNC suspensions was strongly dependent on the concentration and acid hydrolysis time. The CNC suspensions exhibited elastic gel-like rheological behavior at high concentrations but viscous liquid-like rheological behavior at low concentrations. Longer acid hydrolysis time produced CNCs with a lower aspect ratio, leading to higher critical transition concentration for the formation of anisotropic phase. The aspect ratio of CNCs was predicted from the intrinsic viscosity using the Simha's equation. The theoretically predicted aspect ratio values corresponded well with the transmission electron microscopy results. Finally, the network of CNF and CNC suspensions were schematically proposed. (Graph Presented). ©2015 American Chemical Society.
参考文献:
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Araki J, 1998, COLLOID SURFACE A, V142, P75, DOI 10.1016/S0927-7757(98)00404-X
Bayati F, 2014, ACS SUSTAIN CHEM ENG, V2, P1305, DOI 10.1021/sc500133p
Beck-Candanedo S, 2005, BIOMACROMOLECULES, V6, P1048, DOI 10.1021/bm049300p
Benhamou K, 2014, CARBOHYD POLYM, V99, P74, DOI 10.1016/j.carbpol.2013.08.032

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