期刊
CARBOHYDRATE POLYMERS
卷 157, 期 -, 页码 1577-1585出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2016.11.036
关键词
Pine wood; Corncob; Nanocrystalline cellulose; Spray-dried microparticles
资金
- Brazilian research funding institution CAPES
- Brazilian research funding institution CNPq
The extraction of nanocrystalline cellulose from agro-residues is an interesting alternative to recover these materials. In the present study, nanocrystalline cellulose was extracted from pine wood and corncob. In addition, microcrystalline cellulose was used as a reference to compare results. Initially, the lignocellulosic residues were submitted to delignification pre-treatments. At the end of the process, the bleached fibre was submitted to acid hydrolysis. Additionally, microparticles were obtained from the spray-drying of the nanocrystalline cellulose suspensions. The nanocrystalline cellulose yield for the pine wood was 9.0-% of the value attained for the microcrystalline cellulose. For the corncob, the value was 23.5-%. Therefore, complementary studies are necessary to improve the yield. The spray-dried microparticles showed a crystallinity index of 67.8-% for the pine wood, 70.9-% for the corncob and 79.3-% for the microcrystalline cellulose. These microparticles have great potential for use in the production of polymer composites processed by extrusion. (C) 2016 Elsevier Ltd. All rights reserved.
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