Distant Dependent Measurement of Elastic Modulus

Distant Dependent Measurement of Elastic ModulusReviewed by Mohammadmarashi on Mar 30Rating:

Distant Dependent Measurement of Elastic Modulus of Polymer Nanocomposite Fibers via Atomic Force Spectroscopy

Dorsa S. Safanama

Amirkabir University of Technology, Department of Mining and Metallurgical Engineering, Tehran, Iran, P.O. Box 15875-4413

Alireza Zolfaghari Hesari

Chemistry and Chemical Research Center of Iran Tehran, Iran, P.O. Box 14335-186

Seyed Hamed Aboutalebi

Material and Energy Research Center Tehran, Iran, P.O. Box 31787-316

Pirooz Marashi

Amirkabir University of Technology, Department of Mining and Metallurgical Engineering, Tehran, P.O. Box: 15875-4413, Iran

Somayeh Jalilzadeh

SPM lab, Pirooz Applied Materials Research Institute, (PAMRI) Tehran, P.O. Box:15875-3781, Iran

ABSTRACT

In order to study the mechanical properties of nanofibers, a method based on atomic force spectroscopy is introduced. The ability of the atomic force microscope to measure the forces with subnanoNewton sensitivity and nanometer-scale lateral resolution has led to using it as a powerful tool to measure the mechanical properties of nanostructured materials. In this work, composite fibers were produced by electrospinning solution of polyacrylonitrile with carbon nanofibers dispersed in dimethylformamide, which is an effective solvent for carbon nanofibers. Distance dependent measurements were performed on reinforced composite fibers. To quantitatively measure the elastic modulus of nanocomposite materials, measurements were carried out on different points on the surface of the sample and force-distance curves were then plotted. The obtained results fairly agree to previously measured values. The great improvement in elastic modulus was achieved without sacrificing the mechanical strength and stiffness of the polymer, and with minimal weight penalty.