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Title: Comparison of Cellulose Supramolecular Structures Between Nanocrystals of Different Origins

Source: Proceedings of the 18th ISWFPC (International Symposium on Wood, Fiber, and Pulping Chemistry) held in Vienna (Sept 9 -11, 2015). 2015; pp. 6-9.

Author(s)Agarwal, Umesh P.; Reiner, Richard S.; Hunt, Christopher G.; Catchmark, Jeffery; Foster, E. Johan; Isogai, Akira

Publication Year: 2015  View PDF »

Category: Conference Proceedings
Associated Research Project(s):   FPL-4707-3B  FPL-4709-2B

Abstract: In this study, morphologies and supramolecular structures of CNCs from wood-pulp, cotton, bacteria, tunicate, and cladophora were investigated. TEM was used to study the morphological aspects of the nanocrystals whereas Raman spectroscopy provided information on the cellulose molecular structure and its organization within a CNC. Dimensional differences between the CNCs were found to be significant between the groups of tunicate, bacterial, & cladophora and pulp & cotton CNCs. The former group had the highest aspect ratio whereas the latter the smallest. Based on 380-Raman, the crystallinities of CNCs of different origins were different. The order of crystallinity for the CNCs, from high to low, was cotton = bacterial > cladophora > tunicate > pulp. Another property, water accessibility at the molecular level, was measured using a recently developed Raman method and the results indicated that compared to low accessibilities of tunicate and algal celluloses the accessibility of pulp-CNCs was significantly higher. Additionally, Raman information showed that, between the CNCs, differences between the CH2OH conformations were present.

Keywords: Bacterial cellulose; Cladophora cellulose; Cotton; Nanocrystals; Raman spectroscopy; tunicate cellulose; pulp

Publication Review Process: Informally Refereed (Peer-Reviewed)

File size: 277 kb(s)

Date posted: 09/25/2015

This publication is also viewable on Treesearch:  view
RITS Product ID: 75506
Current FPL Scientists associated with this product (listed alphabetically)
Agarwal, Umesh P.
Research Chemist
Hunt, Christopher G.
Research Chemist
 

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