Water sorption behavior and gas barrier properties of cellulose whiskers and microfibrils films

被引：298

作者：

Belbekhouche, Sabrina ^{[2
]}

Bras, Julien ^{[1
]}

Siqueira, Gilberto ^{[1
]}

Chappey, Corinne ^{[2
]}

Lebrun, Laurent ^{[2
]}

Khelifi, Bertine ^{[1
]}

Marais, Stephane ^{[2
]}

Dufresne, Alain ^{[1
]}

机构：

[1] Int Sch Paper, Grenoble Inst Technol INP, F-38402 St Martin Dheres, France

[2] PBS Rouen Univ Rouen, UMR6270, FR3038, INC3M,Lab Polymeres Biopolymeres Surfaces, F-76821 Mont St Aignan, France

来源：

CARBOHYDRATE POLYMERS | 2011年 / 83卷 / 04期

关键词：

Cellulose; Whiskers; Microfibrillated cellulose (MFC); Sisal; Barrier properties; MECHANICAL-PROPERTIES; MOISTURE SORPTION; STARCH; NANOCOMPOSITES; ISOTHERMS;

D O I：

10.1016/j.carbpol.2010.10.036

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Rod-like straight cellulose whiskers and long flexible entangled microfibrillated cellulose (MFC), both extracted from sisal fibers, were used to prepare cellulosic membranes. In view of the promising barrier properties recently reported separately in the literature for these naturally occurring particles it was of interest to investigate the influence of the nature of the nanoparticles (whiskers vs. MFC) on the transport properties of the films. The water vapor and gas (carbon dioxide, nitrogen and oxygen) permeability of films composed of either cellulose nanocrystals or MFC has been reported. It was observed that the diffusion of water is rather controlled by the surface than by the core, probably because of a barrier effect related to the presence of water at the surface during the sorption kinetics. The cellulose whiskers film was found to be much more permeable to gases than MFC. This difference was ascribed to the higher porosity of the former and to the possibility of entanglements of MFC and different surface chemistry. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：1740 / 1748

页数：9

共 39 条

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