Term of Award

Spring 2017

Degree Name

Master of Science in Applied Engineering (M.S.A.E.)

Document Type and Release Option

Thesis (open access)

Copyright Statement / License for Reuse

Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 License.

Department

Department of Mechanical Engineering

Committee Chair

Mujibur Khan

Committee Member 1

Aniruddha Mitra

Committee Member 2

Bishal Silwal

Abstract

The aim of this study is to identify the consequence of nanoscale reinforcement of Cellulose Acetate (CA) fiber and investigate the effect of plasma treatment on piezoelectric Polyvinylidene fluoride (PVDF) fibers. Solution spinning process, coupled with sonication, mixing and extrusion, was used to process the carbon nanotubes (CNTs) reinforced CA bio-composite fiber. And fabrication of heat and plasma treated PVDF fiber to enhance piezo-electric properties was also reported. The prepared fibers are characterized by differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), scanning electronic microscopy (SEM), and fourier transform infrared spectroscopy (FTIR).

The effect of corona application was investigated on piezoelectric PVDF nanofiber membrane. Corona glow was produced by high voltage power source, with 0.01 mA current, 1-4 mm distance between the anode and cathode, and 3-7 kV voltage in the air gap. To get the piezo-electric properties the fiber was heat treated above glass transition temperature (80-120ºC) to get piezoelectric properties and corona was applied to enhance the property. Corona and heat treated nanocomposite fiber offers improved morphological and piezoelectric properties. This work investigates the crystallinity and thermal stability effect on PVDF fiber. An impact test was setup with a spherical ball as impact load and two electrodes on top and bottom surface of the PVDF nanofiber. A digital oscilloscope was attached with the electrodes to observe the generation of voltage upon application of an impact loading from 2 feet height. The voltage gain from the test was 0.03 V for heated and corona treated PVDF nanofiber membrane with respect to non-treated fiber.

Research Data and Supplementary Material

No

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