Nanoindentation study of individual cellulose nanowhisker-reinforced PVA electrospun fiber

被引:29
|
作者
Lee, Jihoon [1 ]
Deng, Yulin [1 ]
机构
[1] Georgia Inst Technol, Sch Chem & Biomol Engn, Atlanta, GA 30332 USA
关键词
Electrospinning; Nanoindentation; Reinforcement; Nanocomposites; Tensile strength; ELASTIC-MODULUS; NANOCOMPOSITES; NANOFIBERS; DEFORMATION; MECHANICS; WHISKERS;
D O I
10.1007/s00289-012-0842-7
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
Electrospun poly(vinyl alcohol) (PVA) fiber and its composites have been widely studied recently. However, most physical properties reported in literature are measured from a nanofiber web. In this study, for the first time, the mechanical properties of individual electrospun fiber, rather than fiber web, of cellulose nanowhisker-reinforced poly(vinyl alcohol) was studied using nanoindentation technique. The modulus is 2.1 GPa for a pure PVA electrospun fiber, and 7.6 GPa for 20.0 wt% cellulose nanowhisker-reinforced PVA electrospun fiber, respectively. The modulus of PVA/cellulose nanowhisker electrospun fibers increases linearly with increasing loading ratio of cellulose nanowhiskers up to 20.0 wt%. The experimental results were compared with that calculated using isotropic and longitudinal Halpin-Tsai models. The modules of the cellulose nanowhiskers are 60-80 % higher than the isotropic model predictions but lower than longitudinal model prediction, suggesting the nanowhiskers are partially aligned to the electrospun fiber direction.
引用
收藏
页码:1205 / 1219
页数:15
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