Identifying multiple forms of lateral disorder in cellulose fibres

L.H. Thomas, C.M. Altaner, M.C. Jarvis

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Many strong biological materials exist in the form of fibres that are partially crystalline but contain a substantial proportion of disordered domains, which contribute to the mechanical performance but result in broadening of the reflections in the diffraction patterns of such materials and make structure determination difficult. Where multiple forms of disorder are simultaneously present, many of the accepted ways of modelling the influence of disorder on a fibre diffraction pattern are inapplicable. Lateral disorder in cellulose fibrils of flax fibres was characterized by a multi-step approach. First, a scattering component derived from domains less uniformly oriented than the rest was isolated. A second scattering component giving rise to asymmetry in the radial profiles of the equatorial reflections was then quantified and subtracted. This component was associated with domains that could be related to the crystalline cellulose lattice, but with more variable and, on average, wider equatorial d spacings. A further partially oriented component with highly disordered lateral d spacings unrelated to any of the cellulose lattice dimensions was identified. This component may be derived from non-cellulosic polysaccharides. The remaining broadening was then separated into a contribution from disorder within the crystalline lattice, including known disorder in hydrogen bonding, and a Scherrer contribution from the microfibril diameter. The methods described are likely to find applications in the study of both natural and synthetic polymer fibres in which mechanical properties are influenced by disorder.
Original languageEnglish
Pages (from-to)972-979
Number of pages8
JournalJournal of Applied Crystallography
Volume46
Issue number4
DOIs
Publication statusPublished - Aug 2013

Fingerprint

Cellulose
Fibers
Crystalline materials
Crystal lattices
Diffraction patterns
Microfibrils
Flax
Scattering
Hydrogen Bonding
Polysaccharides
Polymers
Biological materials
Hydrogen bonds
Mechanical properties

Cite this

Identifying multiple forms of lateral disorder in cellulose fibres. / Thomas, L.H.; Altaner, C.M.; Jarvis, M.C.

In: Journal of Applied Crystallography, Vol. 46, No. 4, 08.2013, p. 972-979.

Research output: Contribution to journalArticle

Thomas, L.H. ; Altaner, C.M. ; Jarvis, M.C. / Identifying multiple forms of lateral disorder in cellulose fibres. In: Journal of Applied Crystallography. 2013 ; Vol. 46, No. 4. pp. 972-979.
@article{2d7cfbd2959445db928b733f41168d89,
title = "Identifying multiple forms of lateral disorder in cellulose fibres",
abstract = "Many strong biological materials exist in the form of fibres that are partially crystalline but contain a substantial proportion of disordered domains, which contribute to the mechanical performance but result in broadening of the reflections in the diffraction patterns of such materials and make structure determination difficult. Where multiple forms of disorder are simultaneously present, many of the accepted ways of modelling the influence of disorder on a fibre diffraction pattern are inapplicable. Lateral disorder in cellulose fibrils of flax fibres was characterized by a multi-step approach. First, a scattering component derived from domains less uniformly oriented than the rest was isolated. A second scattering component giving rise to asymmetry in the radial profiles of the equatorial reflections was then quantified and subtracted. This component was associated with domains that could be related to the crystalline cellulose lattice, but with more variable and, on average, wider equatorial d spacings. A further partially oriented component with highly disordered lateral d spacings unrelated to any of the cellulose lattice dimensions was identified. This component may be derived from non-cellulosic polysaccharides. The remaining broadening was then separated into a contribution from disorder within the crystalline lattice, including known disorder in hydrogen bonding, and a Scherrer contribution from the microfibril diameter. The methods described are likely to find applications in the study of both natural and synthetic polymer fibres in which mechanical properties are influenced by disorder.",
author = "L.H. Thomas and C.M. Altaner and M.C. Jarvis",
year = "2013",
month = "8",
doi = "10.1107/S002188981301056X",
language = "English",
volume = "46",
pages = "972--979",
journal = "Journal of Applied Crystallography",
issn = "0021-8898",
publisher = "International Union of Crystallography",
number = "4",

}

TY - JOUR

T1 - Identifying multiple forms of lateral disorder in cellulose fibres

AU - Thomas, L.H.

AU - Altaner, C.M.

AU - Jarvis, M.C.

PY - 2013/8

Y1 - 2013/8

N2 - Many strong biological materials exist in the form of fibres that are partially crystalline but contain a substantial proportion of disordered domains, which contribute to the mechanical performance but result in broadening of the reflections in the diffraction patterns of such materials and make structure determination difficult. Where multiple forms of disorder are simultaneously present, many of the accepted ways of modelling the influence of disorder on a fibre diffraction pattern are inapplicable. Lateral disorder in cellulose fibrils of flax fibres was characterized by a multi-step approach. First, a scattering component derived from domains less uniformly oriented than the rest was isolated. A second scattering component giving rise to asymmetry in the radial profiles of the equatorial reflections was then quantified and subtracted. This component was associated with domains that could be related to the crystalline cellulose lattice, but with more variable and, on average, wider equatorial d spacings. A further partially oriented component with highly disordered lateral d spacings unrelated to any of the cellulose lattice dimensions was identified. This component may be derived from non-cellulosic polysaccharides. The remaining broadening was then separated into a contribution from disorder within the crystalline lattice, including known disorder in hydrogen bonding, and a Scherrer contribution from the microfibril diameter. The methods described are likely to find applications in the study of both natural and synthetic polymer fibres in which mechanical properties are influenced by disorder.

AB - Many strong biological materials exist in the form of fibres that are partially crystalline but contain a substantial proportion of disordered domains, which contribute to the mechanical performance but result in broadening of the reflections in the diffraction patterns of such materials and make structure determination difficult. Where multiple forms of disorder are simultaneously present, many of the accepted ways of modelling the influence of disorder on a fibre diffraction pattern are inapplicable. Lateral disorder in cellulose fibrils of flax fibres was characterized by a multi-step approach. First, a scattering component derived from domains less uniformly oriented than the rest was isolated. A second scattering component giving rise to asymmetry in the radial profiles of the equatorial reflections was then quantified and subtracted. This component was associated with domains that could be related to the crystalline cellulose lattice, but with more variable and, on average, wider equatorial d spacings. A further partially oriented component with highly disordered lateral d spacings unrelated to any of the cellulose lattice dimensions was identified. This component may be derived from non-cellulosic polysaccharides. The remaining broadening was then separated into a contribution from disorder within the crystalline lattice, including known disorder in hydrogen bonding, and a Scherrer contribution from the microfibril diameter. The methods described are likely to find applications in the study of both natural and synthetic polymer fibres in which mechanical properties are influenced by disorder.

UR - http://www.scopus.com/inward/record.url?scp=84880562312&partnerID=8YFLogxK

UR - http://dx.doi.org/10.1107/S002188981301056X

U2 - 10.1107/S002188981301056X

DO - 10.1107/S002188981301056X

M3 - Article

VL - 46

SP - 972

EP - 979

JO - Journal of Applied Crystallography

JF - Journal of Applied Crystallography

SN - 0021-8898

IS - 4

ER -