期刊
CARBOHYDRATE POLYMERS
卷 136, 期 -, 页码 955-963出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2015.10.008
关键词
Cellulose nanofiber (CNF); Unsaturated polyester resin (UPR); Composites; Cellulose waste; Mechanical fibrillation
资金
- CAPES/FAPERGS
- Secretariat of Economic Development, Science and Technology of the State of Rio Grande do Sul
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.
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