Application of small-angle X-ray scattering to predict microfibril angle in Acacia mangium wood

Tamer A. Tabet, Fauziah Haji Abdul Aziz, Shahidan Radiman

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Partially crystalline cellulose microfibrils are wound helically around the longitudinal axis of the wood cell. A method is presented for the measurement, using small-angle X-ray scattering (SAXS), of the microfibril angle, (MFA) and the associated standard deviation for the cellulose microfibrils in the S 2 layer of the cell walls of Acacia mangium wood. The length and orientation of the microfibrils of the cell walls in the irradiated volume of the thin samples are measured using SAXS and scanning electron microscope, (SEM). The undetermined parameters in the analysis are the MFA, (M) and the standard deviation (σΦ) of the intensity distribution arising from the wandering of the fibril orientation about the mean value. Nine separate pairs of values are determined for nine different values of the angle of the incidence of the X-ray beam relative to the normal to the radial direction in the sample. The results show good agreement. The curve distribution of scattered intensity for the real cell wall structure is compared with that calculated with that assembly of rectangular cells with the same ratio of transverse to radial cell wall length. It is demonstrated that for β = 45°, the peaks in the curve intensity distribution for the real and the rectangular cells coincide. If this peak position is Φ45, Then the MFA can be determined from the relation M = tan-1 (tan Φ45 / cos 45°), which is precise for rectangular cells.

Original languageEnglish
Title of host publicationAdvanced Materials Research
Pages72-77
Number of pages6
Volume173
DOIs
Publication statusPublished - 2011
EventInternational Conference on X-ray and Related Techniques in Research and Industry, IXCRI 2010 - Langkawi Island
Duration: 9 Jun 201010 Jun 2010

Publication series

NameAdvanced Materials Research
Volume173
ISSN (Print)10226680

Other

OtherInternational Conference on X-ray and Related Techniques in Research and Industry, IXCRI 2010
CityLangkawi Island
Period9/6/1010/6/10

Fingerprint

X ray scattering
Wood
Cells
Cellulose
Electron microscopes
Crystalline materials
Scanning
X rays

Keywords

  • Acacia mangium
  • Fibre length
  • MFA
  • Microfibril angle
  • Small-angle X-ray scattering

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Tabet, T. A., Aziz, F. H. A., & Radiman, S. (2011). Application of small-angle X-ray scattering to predict microfibril angle in Acacia mangium wood. In Advanced Materials Research (Vol. 173, pp. 72-77). (Advanced Materials Research; Vol. 173). https://doi.org/10.4028/www.scientific.net/AMR.173.72

Application of small-angle X-ray scattering to predict microfibril angle in Acacia mangium wood. / Tabet, Tamer A.; Aziz, Fauziah Haji Abdul; Radiman, Shahidan.

Advanced Materials Research. Vol. 173 2011. p. 72-77 (Advanced Materials Research; Vol. 173).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Tabet, TA, Aziz, FHA & Radiman, S 2011, Application of small-angle X-ray scattering to predict microfibril angle in Acacia mangium wood. in Advanced Materials Research. vol. 173, Advanced Materials Research, vol. 173, pp. 72-77, International Conference on X-ray and Related Techniques in Research and Industry, IXCRI 2010, Langkawi Island, 9/6/10. https://doi.org/10.4028/www.scientific.net/AMR.173.72
Tabet TA, Aziz FHA, Radiman S. Application of small-angle X-ray scattering to predict microfibril angle in Acacia mangium wood. In Advanced Materials Research. Vol. 173. 2011. p. 72-77. (Advanced Materials Research). https://doi.org/10.4028/www.scientific.net/AMR.173.72
Tabet, Tamer A. ; Aziz, Fauziah Haji Abdul ; Radiman, Shahidan. / Application of small-angle X-ray scattering to predict microfibril angle in Acacia mangium wood. Advanced Materials Research. Vol. 173 2011. pp. 72-77 (Advanced Materials Research).
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AB - Partially crystalline cellulose microfibrils are wound helically around the longitudinal axis of the wood cell. A method is presented for the measurement, using small-angle X-ray scattering (SAXS), of the microfibril angle, (MFA) and the associated standard deviation for the cellulose microfibrils in the S 2 layer of the cell walls of Acacia mangium wood. The length and orientation of the microfibrils of the cell walls in the irradiated volume of the thin samples are measured using SAXS and scanning electron microscope, (SEM). The undetermined parameters in the analysis are the MFA, (M) and the standard deviation (σΦ) of the intensity distribution arising from the wandering of the fibril orientation about the mean value. Nine separate pairs of values are determined for nine different values of the angle of the incidence of the X-ray beam relative to the normal to the radial direction in the sample. The results show good agreement. The curve distribution of scattered intensity for the real cell wall structure is compared with that calculated with that assembly of rectangular cells with the same ratio of transverse to radial cell wall length. It is demonstrated that for β = 45°, the peaks in the curve intensity distribution for the real and the rectangular cells coincide. If this peak position is Φ45, Then the MFA can be determined from the relation M = tan-1 (tan Φ45 / cos 45°), which is precise for rectangular cells.

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