Aerocellulose Based on All-Cellulose Composites

被引：59

作者：

Duchemin, Benoit J. C. ^{[1
]}

Staiger, Mark P. ^{[1
]}

Tucker, Nick ^{[2
]}

Newman, Roger H. ^{[3
]}

机构：

[1] Univ Canterbury, Dept Mech Engn, Christchurch 1, New Zealand

[2] Food & Biomat Grp, Christchurch, New Zealand

[3] Scion, Bioprod Dev, Rotorua 3046, New Zealand

来源：

JOURNAL OF APPLIED POLYMER SCIENCE | 2010年 / 115卷 / 01期

关键词：

all-cellulose composite; aerogel; WAXS; mechanical properties; microstructure; AEROGELS; STARCH; FIBER;

D O I：

10.1002/app.31111

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Novel aerogels (or aerocellulose) based on all-cellulose composites were prepared by partially dissolving microcrystalline cellulose (MCC) in an 8 wt % LiCl/DMAc solution. During this process, large MCC crystals and fiber fragments were progressively split into thinner crystals and cellulose fibrils. The extent of the transformation was controlled by using cellulose concentrations ranging from 5 to 20 wt % in the LiCl/DMAc solution. Cellulose gels were precipitated and then processed by freeze-drying to maintain the openness of the structure. The density of aerocellulose increased with the initial cellulose concentration and ranged from 1.16 up to 350 kg m(-3). Aerocellulose with relatively high mechanical properties were successfully produced. The flexural strength of the materials reached 8.1 MPa and their stiffness was as high as 280 MPa. (C) 2009 Wiley Periodicals, Inc. J Appl Polym Sci 115: 216-221, 2010

引用

页码：216 / 221

页数：6

共 37 条

[1] The preparation of lignocellulosic aerogels from ionic liquid solutions [J].

Aaltonen, Olli ;

Jauhiainen, Olli .

CARBOHYDRATE POLYMERS, 2009, 75 (01) :125-129

[2] MESOPHASE FORMATION AND CHAIN RIGIDITY IN CELLULOSE AND DERIVATIVES .4. CELLULOSE IN N,N-DIMETHYLACETAMIDE LITHIUM-CHLORIDE [J].

BIANCHI, E ;

CIFERRI, A ;

CONIO, G ;

COSANI, A ;

TERBOJEVICH, M .

MACROMOLECULES, 1985, 18 (04) :646-650

[3] Cosmic dust collection in aerogel [J].

Burchell, Mark J. ;

Graham, Giles ;

Kearsley, Anton .

ANNUAL REVIEW OF EARTH AND PLANETARY SCIENCES, 2006, 34 :385-418

[4] Molecular modeling of cellulose in amorphous state. Part I: model building and plastic deformation study [J].

Chen, W ;

Lickfield, GC ;

Yang, CQ .

POLYMER, 2004, 45 (03) :1063-1071

[5] Structure-property relationship of all-cellulose composites [J].

Duchemin, Benoit J. C. ;

Newman, Roger H. ;

Staiger, Mark P. .

COMPOSITES SCIENCE AND TECHNOLOGY, 2009, 69 (7-8) :1225-1230

[6] Phase transformations in microcrystalline cellulose due to partial dissolution [J].

Duchemin, Benoit J. -C. Z. ;

Newman, Roger H. ;

Staiger, Mark P. .

CELLULOSE, 2007, 14 (04) :311-320

[7] Cellulose in lithium chloride/N,N-dimethylacetamide, optimisation of a dissolution method using paper substrates and stability of the solutions [J].

Dupont, AL .

POLYMER, 2003, 44 (15) :4117-4126

[8] Cellulose-based aerogels [J].

Fischer, F. ;

Rigacci, A. ;

Pirard, R. ;

Berthon-Fabry, S. ;

Achard, P. .

POLYMER, 2006, 47 (22) :7636-7645

[9] Aerocellulose: New highly porous cellulose prepared from cellulose-NaOH aqueous solutions [J].

Gavillon, Roxane ;

Budtova, Tatiana .

BIOMACROMOLECULES, 2008, 9 (01) :269-277

[10] Structure and properties of a pulp fibre-reinforced composite with regenerated cellulose matrix [J].

Gindl, W ;

Schöberl, T ;

Keckes, J .

APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING, 2006, 83 (01) :19-22

← 1 2 3 4 →