Nanoscale characterization of natural fibers and their composites using contact-resonance force microscopy

被引：64

作者：

Nair, Sandeep S. ^{[1
]}

Wang, Siqun ^{[1
]}

Hurley, Donna C. ^{[2
]}

机构：

[1] Univ Tennessee, Tennessee Forest Prod Ctr, Knoxville, TN 37996 USA

[2] NIST, Div Mat Reliabil, Boulder, CO USA

来源：

COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING | 2010年 / 41卷 / 05期

关键词：

Polymer-matrix composites (PMCs); Fibers; Interphase; Mechanical properties; REINFORCED POLYPROPYLENE COMPOSITE; WOOD CELL-WALL; MECHANICAL-PROPERTIES; SECONDARY WALL; LONGITUDINAL HARDNESS; YOUNGS MODULUS; INTERPHASE; NANOINDENTATION; ORIENTATION; STIFFNESS;

D O I：

10.1016/j.compositesa.2010.01.009

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Contact-resonance force microscopy (CR-FM) has been used for the first time to evaluate the mechanical properties of the interphase in natural fiber-reinforced composites and of cell wall layers of natural fibers. With CR-FM, quantitative images of the spatial distribution in nanoscale elastic properties were acquired. The images were calibrated with nanoindentation values. From the modulus images, the average interphase width was found to be (49 +/- 5) nm for composite without any treatment, and (139 +/- 21) nm for one with a maleic anhydride polypropylene treatment. There was a gradient of modulus across the interphase that ranged between the values of fiber and the polymer. The average values of indentation modulus obtained for different cell wall layers within a fiber were 22.5-28.0 GPa, 17.9-20.2 GPa, and 15.0-15.5 GPa for the S-2 and S-1 layers and the compound middle lamellae, respectively. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：624 / 631

页数：8

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