期刊
COMPOSITES SCIENCE AND TECHNOLOGY
卷 117, 期 -, 页码 26-31出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compscitech.2015.05.018
关键词
Nano composites; Polymer; Cellulose nanocystals; Mechanical properties; Synergism
资金
- Basque Government [ACTIMAT IE13-380]
- European Commission [FP7-NMP-280786]
Cellulose nanocrystal-stabilized graphene (GR-CNC) was produced by liquid phase exfoliation of graphite assisted by cellulose nanocrystals (CNC), a recently reported method that allows stabilization of resulting graphene flakes in aqueous dispersions. Using a simple and environmentally friendly process, GR-CNC was incorporated into poly(vinyl alcohol) (PVA) aqueous solutions to obtain PVA-based nanocomposites (GR-CNC/PVA) by a casting method. For comparison purposes, two reference materials were also prepared following the same procedure: CNC/PVA and GR-T/PVA, where graphene was stabilized by an organic surfactant, Triton X-100 (T). At 1 wt% nanofiller loading, GR-CNC/PVA exhibited superior mechanical properties (improvements in tensile strength and Young's modulus were about 20% and 50%, respectively, compared with neat PVA) than CNC/PVA (4% increase in tensile strength and 19% in Young's modulus) and GR-T/PVA (where a decrease in mechanical properties was observed), suggesting the synergistic reinforcing effect of CNC and graphene (GR). This significant reinforcement found for GR-CNC/PVA is attributed to the strong interaction between PVA and GR-CNC. (C) 2015 Elsevier Ltd. All rights reserved.
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