Structure of cellulose microfibrils in mature cotton fibres

被引:100
作者
Martinez-Sanz, Marta [1 ,2 ]
Pettolino, Filomena [3 ]
Flanagan, Bernadine [2 ]
Gidley, Michael J. [2 ]
Gilbert, Elliot P. [1 ,4 ,5 ]
机构
[1] Australian Nucl Sci & Technol Org, Australian Ctr Neutron Scattering, Locked Bag 2001, Kirrawee Dc, NSW 2232, Australia
[2] Univ Queensland, ARC Ctr Excellence Plant Cell Walls, Ctr Nutr & Food Sci, St Lucia, Qld 4072, Australia
[3] CSIRO Agr & Food, POB 1700, Canberra, ACT 2601, Australia
[4] Univ Queensland, Australian Inst Bioengn & Nanotechnol, Brisbane, Qld 4072, Australia
[5] Univ Queensland, Queens Land Alliance Agr & Food Innovat, Brisbane, Qld 4072, Australia
基金
澳大利亚研究理事会;
关键词
Small angle scattering; Neutron scattering; Cotton; Cellulose; Plant cell walls; CELL-WALL POLYSACCHARIDES; X-RAY-SCATTERING; ANGLE NEUTRON-SCATTERING; I-BETA CELLULOSE; BACTERIAL CELLULOSE; ACETOBACTER-XYLINUM; NATIVE CELLULOSES; HIGH-TEMPERATURES; C-13; NMR; ARCHITECTURE;
D O I
10.1016/j.carbpol.2017.07.090
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
The structure of cellulose microfibrils in mature cotton fibres from three varieties-Gossypium hirsuturn, G. barbadense and G. arboreum-has been investigated by a multi-techniqueapproach combining small angle scattering techniques with spectroscopy and diffraction. Cellulose microfibrils present a iprich crystalline structure with limited surface disorder. Small angle scattering (SAXS and SANS) data have been successfully fitted using a core-shell model and the results obtained indicate that the cellulose microfibrils, formed by the association of 2-3 elementary fibrils, are composed of a ca. 2 nm impermeable crystalline core, surrounded by a partially hydrated paracrystalline shell, with overall cross-sections of ca. 3.6-4.7 nm. Different low levels of cell wall matrix components have a strong impact on the microfibril architecture and enable moisture penetration upon hydration. Furthermore, the higher amounts of non-cellulosic components in G. barbadense result in a less dense packing of cellulose microfibrils and increased solvent accessibility. (C) 2017 Elsevier Ltd. All rights reserved.
引用
收藏
页码:450 / 463
页数:14
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