期刊
INDUSTRIAL CROPS AND PRODUCTS
卷 83, 期 -, 页码 746-754出版社
ELSEVIER
DOI: 10.1016/j.indcrop.2015.11.083
关键词
Pinecone; Forest residue; Chemical pretreatment; Nanocellulose; Bionanocomposites
资金
- NSERC Network for Innovative Plastic Materials and Manufacturing Process (NIPMMP)
Nanocellulose fibers were produced from pinecone (Jack pine: Pinus banksiana Lamb) using chemical and mechanical treatments. The effects of pretreatment and mechanical grinding on the tensile strength and modulus of the cellulosic fiber sheets were studied to optimize the treatment conditions and grinding process used for the generation of high strength nanocellulose fibers. Pinecone and cellulose fibers were characterized for their chemical composition, morphology, crystallinity, and thermal properties using HPLC, FTIR, SEM, ESEM, XRD, and TGA to provide insight into the mechanism involved in the reactions. Cellulose suspensions that had different pretreatments were processed for different time periods in a Supermasscolloider to produce cellulose nanofibers. The cellulose fibers produced at the optimum chemical concentrations of 4 wt% NaOH and 5 wt% of acidified sodium chlorite solution contained approximately 89% of cellulose, 4% hemicellulose, and 6% lignin. About 67% of the prepared nanocellulose fibers showed a diameter range between 5 and 25 nm. The tensile strength and modulus of the nano fiber films prepared at the optimized grinding condition were 273 MPa and 17 GPa, respectively. The high crystalline index (70%) and improved thermal stability of the nanofibers indicate their suitability for manufacturing bionanocomposites. (C) 2015 Published by Elsevier B.V.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据