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Microscale evaluation of the viscoelastic properties of polymer gel for artificial muscles using transmission acoustic microscopy

Kolosov, Oleg and Suzuki, M and Yamanaka, K (1993) Microscale evaluation of the viscoelastic properties of polymer gel for artificial muscles using transmission acoustic microscopy. Journal of Applied Physics, 74 (10). pp. 6407-6412. ISSN 0021-8979

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Abstract

Local viscoelastic properties and a micromechanical structure of polymer hydrogel were studied using transmission acoustic microscopy (AM) with a spatial resolution up to 5 mum. Utilizing various amplitude, phase, and pulse techniques provided by the transmission AM, a velocity and an attenuation of the acoustic wave in the local point of the polymer sample as well as a frequency dependence (dispersion) of these values were evaluated in the frequency range from 30 to 320 MHz. Using these facilities a poly(vinylalcohol) polymer hydrogel for the artificial muscle was studied at the succeeding steps of its manufacturing process of cyclic freezing-thawing. It was found that synchronously, with the increase of the compressional elasticity and acoustic attenuation, a micromechanical nonuniformity of the gel also profoundly enhances it. Fiber-like structures of 10-50 mum width possessing higher elastic modulus appear in the gel which can play a significant role in the macroscopic mechanical properties of the gel.

Item Type: Article
Journal or Publication Title: Journal of Applied Physics
Uncontrolled Keywords: BIOLOGICAL MATERIALS ; POLYMERS ; GELS ; VISCOELASTICITY ; ACOUSTIC MICROSCOPY ; MUSCLES ; ARTIFICIAL ORGANS ; DISPERSION RELATIONS ; MHZ RANGE ; FIBERS
Subjects: Q Science > QC Physics
Departments: Faculty of Science and Technology > Physics
ID Code: 57400
Deposited By: ep_importer_pure
Deposited On: 05 Oct 2012 15:29
Refereed?: Yes
Published?: Published
Last Modified: 05 Oct 2012 15:29
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/57400

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