Small-angle scattering model for efficient characterization of wood nanostructure and moisture behaviour

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Small-angle scattering model for efficient characterization of wood nanostructure and moisture behaviour. / Penttilä, Paavo A.; Rautkari, Lauri; Österberg, Monika; Schweins, Ralf.

In: Journal of Applied Crystallography, Vol. 52, No. 2, 26.03.2019, p. 369-377.

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@article{7192e2df167645dfb608e68d04f4db88,
title = "Small-angle scattering model for efficient characterization of wood nanostructure and moisture behaviour",
abstract = "Small-angle scattering methods allow an efficient characterization of the hierarchical structure of wood and other cellulosic materials. However, their full utilization would require an analytical model to fit the experimental data. This contribution presents a small-angle scattering model tailored to the analysis of wood samples. The model is based on infinitely long cylinders packed in a hexagonal array with paracrystalline distortion, adapted to the particular purpose of modelling the packing of cellulose microfibrils in the secondary cell wall of wood. The new model has been validated with small-angle neutron and X-ray scattering data from real wood samples at various moisture contents. The model yields reasonable numerical values for the microfibril diameter (2.1–2.5 nm) and packing distance (4 and 3 nm in wet and dry states, respectively) and comparable results between the two methods. It is particularly applicable to wet wood samples and allows changes in the packing of cellulose microfibrils to be followed as a function of moisture content.",
keywords = "cellulose, moisture behaviour, small-angle scattering, structural characterization, wood",
author = "Penttil{\"a}, {Paavo A.} and Lauri Rautkari and Monika {\"O}sterberg and Ralf Schweins",
year = "2019",
month = "3",
day = "26",
doi = "10.1107/S1600576719002012",
language = "English",
volume = "52",
pages = "369--377",
journal = "Journal of Applied Crystallography",
issn = "0021-8898",
publisher = "International Union of Crystallography",
number = "2",

}

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TY - JOUR

T1 - Small-angle scattering model for efficient characterization of wood nanostructure and moisture behaviour

AU - Penttilä, Paavo A.

AU - Rautkari, Lauri

AU - Österberg, Monika

AU - Schweins, Ralf

PY - 2019/3/26

Y1 - 2019/3/26

N2 - Small-angle scattering methods allow an efficient characterization of the hierarchical structure of wood and other cellulosic materials. However, their full utilization would require an analytical model to fit the experimental data. This contribution presents a small-angle scattering model tailored to the analysis of wood samples. The model is based on infinitely long cylinders packed in a hexagonal array with paracrystalline distortion, adapted to the particular purpose of modelling the packing of cellulose microfibrils in the secondary cell wall of wood. The new model has been validated with small-angle neutron and X-ray scattering data from real wood samples at various moisture contents. The model yields reasonable numerical values for the microfibril diameter (2.1–2.5 nm) and packing distance (4 and 3 nm in wet and dry states, respectively) and comparable results between the two methods. It is particularly applicable to wet wood samples and allows changes in the packing of cellulose microfibrils to be followed as a function of moisture content.

AB - Small-angle scattering methods allow an efficient characterization of the hierarchical structure of wood and other cellulosic materials. However, their full utilization would require an analytical model to fit the experimental data. This contribution presents a small-angle scattering model tailored to the analysis of wood samples. The model is based on infinitely long cylinders packed in a hexagonal array with paracrystalline distortion, adapted to the particular purpose of modelling the packing of cellulose microfibrils in the secondary cell wall of wood. The new model has been validated with small-angle neutron and X-ray scattering data from real wood samples at various moisture contents. The model yields reasonable numerical values for the microfibril diameter (2.1–2.5 nm) and packing distance (4 and 3 nm in wet and dry states, respectively) and comparable results between the two methods. It is particularly applicable to wet wood samples and allows changes in the packing of cellulose microfibrils to be followed as a function of moisture content.

KW - cellulose

KW - moisture behaviour

KW - small-angle scattering

KW - structural characterization

KW - wood

UR - http://www.scopus.com/inward/record.url?scp=85063570816&partnerID=8YFLogxK

U2 - 10.1107/S1600576719002012

DO - 10.1107/S1600576719002012

M3 - Article

VL - 52

SP - 369

EP - 377

JO - Journal of Applied Crystallography

JF - Journal of Applied Crystallography

SN - 0021-8898

IS - 2

ER -

ID: 32930586