All-Cellulose Composites by Partial Dissolution of Cotton Fibres

被引:19
作者
Arevalo, Raquel [1 ,2 ]
Picot, Olivier T. [1 ,2 ]
Wilson, Rory M. [1 ,2 ]
Soykeabkaew, Nattakan [1 ,2 ,3 ]
Peijs, Ton [1 ,2 ,4 ]
机构
[1] Queen Mary Univ London, Sch Mat Sci & Engn, London E1 4NS, England
[2] Queen Mary Univ London, Ctr Mat Res, London E1 4NS, England
[3] Mae Fah Luang Univ, Sch Sci, Chiang Rai 57100, Thailand
[4] Eindhoven Univ Technol, Eindhoven Polymer Labs, NL-5600 MB Eindhoven, Netherlands
关键词
Self-Reinforced Polymer; All-Cellulose; DMAc; Surface Dissolution; Cotton; MOLECULAR-WEIGHT CHARACTERIZATION; LITHIUM-CHLORIDE; FLAX FIBERS; SOLVENT EXCHANGE; PARTIAL OXYPROPYLATION; MECHANICAL-PROPERTIES; VOLUME FRACTION; POLYPROPYLENE; NANOCOMPOSITES; BEHAVIOR;
D O I
10.1166/jbmb.2010.1077
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
In this work isotropic 'self-reinforced cellulose' or 'all-cellulose' composites have been successfully prepared from cotton pads by means of a fibre surface dissolution method in lithium chloride dissolved in N, N-dimethylacetamide (LiCl/DMAc). Solvent exchange was used as activation pretreatment, involving subsequent immersion of the fibres in water, acetone and DMAc. Three different parameters have been studied: (i) dissolution time, (ii) activation time and (iii) cotton source. The morphological, thermal and mechanical properties of the obtained all-cellulose composites were characterized. It was found that a dissolution time of 18 h lead to biobased materials with the best overall mechanical performance, as this time allowed for the dissolution of a sufficient amount of fibre surface to obtain good interfacial bonding between fibres, while keeping a considerable amount of remaining fibre cores that provide a strong reinforcement to the composite.
引用
收藏
页码:129 / 138
页数:10
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