Dynamic-mechanical and thermomechanical properties of cellulose nanofiber/polyester resin composites

被引：85
|
作者：
Lavoratti, Alessandra [1 ]
Scienza, Lisete Cristine [2 ]
Zattera, Ademir Jose [1 ]
机构：
[1] Univ Caxias do Sul UCS, Lab Polymers LPOL, Postgrad Program Engn Proc & Technol PGEPROTEC, BR-95070490 Caxias Do Sul, RS, Brazil
[2] Univ Fed Rio Grande do Sul, Dept Mat DEMAT, BR-91501970 Porto Alegre, RS, Brazil
来源：
CARBOHYDRATE POLYMERS | 2016年 / 136卷
关键词：
Cellulose nanofiber (CNF); Unsaturated polyester resin (UPR); Composites; Cellulose waste; Mechanical fibrillation; MICROFIBRILLATED CELLULOSE; NANOCELLULOSE; NANOFIBERS; BEHAVIOR; WOOD;
D O I：
10.1016/j.carbpol.2015.10.008
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
Composites of unsaturated polyester resin (UPR) and cellulose nanofibers (CNFs) obtained from dry cellulose waste of softwood (Pinus sp.) and hardwood (Eucalyptus sp.) were developed. The fiber properties and the influence of the CNFs in the dynamic-mechanical and thermomechanical properties of the composites were evaluated. CNFs with a diameter of 70-90 nm were obtained. Eucalyptus sp. has higher a-cellulose content than Pinus sp. fibers. The crystallinity of the cellulose pulps decreased after grinding. However, high values were still obtained. The chemical composition of the fibers was not significantly altered by the grinding process. Eucalyptus sp. CNF composites had water absorption close to the neat resin at 1 wt% filler. The dynamic-mechanical properties of Eucalyptus sp. CNFs were slightly increased and the thermal stability was improved. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码：955 / 963
页数：9
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