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United States Department of Agriculture

Agricultural Research Service

Research Project: Influence of Structure and Moisture on Cotton Fiber Properties

Location: Cotton Structure and Quality Research

Title: Cellulose

Author
item French, Alfred

Submitted to: Encyclopedia of Biophysics
Publication Type: Book / Chapter
Publication Acceptance Date: February 11, 2011
Publication Date: March 31, 2013
Citation: French, A.D. 2013. Cellulose. Encyclopedia of Biophysics. p.248-253.DOI 10.1007/978-3-642-16712-6.

Interpretive Summary: Cellulose properties and structure are reviewed, with a primary focus on crystal structure and polymorphy. This focus highlights the conversion from cellulose I to cellulose II, which converts the molecules to being all parallel to each other in the crystal to being antiparallel. This has been controversial for many years. To reinforce the antiparallel arrangement of cellulose II, its correspondence with small fragments of cellulose, namely methyl cellotrioside and cellotetraose, is demonstrated by highly similar powder diffraction diagrams. A new drawing was prepared for this work that compared calculated diffraction patterns from the three crystals. Using calculated data allowed identical crystallite sizes to be utilized. Molecular models, from cellobiose to crystals of realistic sizes were mentioned.

Technical Abstract: Cellulose properties and structure are reviewed, with a primary focus on crystal structure and polymorphy. This focus highlights the conversion from cellulose I to cellulose II, which converts the molecules to being all parallel to each other in the crystal to being antiparallel. This has been controversial for many years. To reinforce the antiparallel arrangement of cellulose II, its correspondence with small fragments of cellulose, namely methyl cellotrioside and cellotetraose, is demonstrated by highly similar powder diffraction diagrams. A new drawing was prepared for this work that compared calculated diffraction patterns from the three crystals. Using calculated data allowed identical crystallite sizes to be utilized. Molecular models, from cellobiose to crystals of realistic sizes were mentioned.

Last Modified: 7/22/2014
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