Title

Characterization of the Mechanical and Piezoelectric Properties of Polymer Fibers

Presenter Information

Andrew Hedlund

Department

Mechanical and Aerospace Engineering

Major

Aerospace Engineering

Research Advisor

Wojnar, Charles

Advisor's Department

Mechanical and Aerospace Engineering

Abstract

The development of piezoelectric materials has enabled new realms of fine precision motors, sensors, and generators. The most commonly used piezoelectrics are ceramics. Less commonly used are also piezoelectric polymers such as polyvinylidene-fluoride (PVDF). PVDF has applications in the biomedical industry as a sanitary and sensing material, as well as having applications in the aerospace industry as a sensing material for skins and structures. Most of the information regarding the piezoelectric properties of PVDF applies only to a woven mat of polymer created through the electrospinning process. This study aims to characterize the Young’s Modulus and direct piezoelectric effect constant of an individual fiber of the PVDF polymer. To this end, an experimental setup that was constructed during a previous OURE project will be utilized, which has the capability to apply mechanical stresses to fibers while measuring the voltage generated by the fiber.

Biography

Andrew Hedlund is an undergraduate student researcher with the Mechanical and Aerospace Engineering Department at the Missouri University of Science and Technology. He is a junior in aerospace engineering, focusing on structural analysis and applications. In 2016 he began studying the optimization of testing piezoelectric fibers and in March 2017 developed a cantilever beam tensile testing setup which minimized ambient noise and reduced error due to friction loss. Andrew is due to graduate with a B.S. in Aerospace Engineering in May 2018.

Presentation Type

OURE Fellows Proposal Oral Applicant

Document Type

Presentation

Location

Turner Room

Start Date

4-11-2017 10:40 AM

End Date

4-11-2017 11:00 AM

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Apr 11th, 10:40 AM Apr 11th, 11:00 AM

Characterization of the Mechanical and Piezoelectric Properties of Polymer Fibers

Turner Room

The development of piezoelectric materials has enabled new realms of fine precision motors, sensors, and generators. The most commonly used piezoelectrics are ceramics. Less commonly used are also piezoelectric polymers such as polyvinylidene-fluoride (PVDF). PVDF has applications in the biomedical industry as a sanitary and sensing material, as well as having applications in the aerospace industry as a sensing material for skins and structures. Most of the information regarding the piezoelectric properties of PVDF applies only to a woven mat of polymer created through the electrospinning process. This study aims to characterize the Young’s Modulus and direct piezoelectric effect constant of an individual fiber of the PVDF polymer. To this end, an experimental setup that was constructed during a previous OURE project will be utilized, which has the capability to apply mechanical stresses to fibers while measuring the voltage generated by the fiber.