Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7791082 | Carbohydrate Polymers | 2014 | 8 Pages |
Abstract
Long filamentous nanocellulose fibrils (NCFs) were prepared from chemical-thermomechanical pulps (CTMP) using ultrasonication. Their contribution to enhancements in thermal stability and mechanical properties of poly(vinyl alcohol) films were investigated. The unique chemical pretreatment and mechanical effects of CTMP loosen and unfold fibers during the pulping process, which enables further chemical purification and subsequent ultrasound treatment for formation of NCFs. The NCFs exhibited higher crystallinity (72.9%) compared with that of CTMP (61.5%), and had diameters ranging from 50 to 120Â nm. A NCF content of 6Â wt% was found to yield the best thermal stability, light transmittance, and mechanical properties in the PVA/NCF composites. The composites also exhibited a visible light transmittance of 73.7%, and the tensile strength and Young's modulus were significantly improved, with values 2.8 and 2.4 times larger, respectively, than that of neat PVA.
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Authors
Wei Li, Qiong Wu, Xin Zhao, Zhanhua Huang, Jun Cao, Jian Li, Shouxin Liu,