Multi-scale model for the hierarchical architecture of native cellulose hydrogels

被引：48

作者：

Martinez-Sanza, Marta ^{[1
,2
]}

Mikkelsen, Deirdre ^{[2
]}

Flanagan, Bernadine ^{[2
]}

Gidley, Michael J. ^{[2
]}

Gilbert, Elliot P. ^{[1
]}

机构：

[1] Australian Nucl Sci & Technol Org, Bragg Inst, Locked Bag 2001, Kirrawee Dc, NSW 2232, Australia

[2] Univ Queensland, Ctr Nutr & Food Sci, ARC Ctr Excellence Plant Cell Walls, Brisbane, Qld 4072, Australia

来源：

CARBOHYDRATE POLYMERS | 2016年 / 147卷

关键词：

Small angle scattering; Neutron scattering; Deuteration; Cellulose; Hydrogels; Komagataeibacter xylinus; ANGLE NEUTRON-SCATTERING; DIFFERENT POLYMERIC ADDITIVES; IN-SITU CRYSTALLIZATION; CELL-WALL NANOSTRUCTURE; BACTERIAL CELLULOSE; ACETOBACTER-XYLINUM; STATE; POLYSACCHARIDES; HEMICELLULOSES; COMPOSITES;

D O I：

10.1016/j.carbpol.2016.03.098

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

The structure of protiated and deuterated cellulose hydrogels has been investigated using a multi technique approach combining small-angle scattering with diffraction, spectroscopy and microscopy. A model for the multi-scale structure of native cellulose hydrogels is proposed which highlights the essential role of water at different structural levels characterised by: (i) the existence of cellulose microfibrils containing an impermeable crystalline core surrounded by a partially hydrated paracrystalline shell, (ii) the creation of a strong network of cellulose microfibrils held together by hydrogen bonding to form cellulose ribbons and (iii) the differential behaviour of tightly bound water held within the ribbons compared to bulk solvent. Deuterium labelling provides an effective platform on which to further investigate the role of different plant cell wall polysaccharides in cellulose composite formation through the production of selectively deuterated cellulose composite hydrogels. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：542 / 555

页数：14