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Development of Elastic Protein-based Polymers as Materials for Acoustic Absorption

Published online by Cambridge University Press:  15 February 2011

Dan W. Urry ,
J. Xu ,
Weijun Wang ,
Larry Hayes ,
Frederic Prochazka  and
Timothy M. Parker
Dan W. Urry
Affiliation:
Bioelastics Research Ltd., 2800 Milan Court, Suite 386, Birmingham, AL, 35211-6918, USA.
J. Xu
Affiliation:
Bioelastics Research Ltd., 2800 Milan Court, Suite 386, Birmingham, AL, 35211-6918, USA.
Weijun Wang
Affiliation:
Bioelastics Research Ltd., 2800 Milan Court, Suite 386, Birmingham, AL, 35211-6918, USA.
Larry Hayes
Affiliation:
Bioelastics Research Ltd., 2800 Milan Court, Suite 386, Birmingham, AL, 35211-6918, USA.
Frederic Prochazka
Affiliation:
Bioelastics Research Ltd., 2800 Milan Court, Suite 386, Birmingham, AL, 35211-6918, USA.
Timothy M. Parker
Affiliation:
Bioelastics Research Ltd., 2800 Milan Court, Suite 386, Birmingham, AL, 35211-6918, USA.
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Abstract

Elastic protein-based polymers comprised of repeating pentapeptide sequences, (GXGXP)n, exhibit mechanical resonances that have been observed to date with frequency maxima near 5 MHz and 3 kHz. Because the 3 kHz resonance is in the middle of the acoustic frequency range, the purpose here is to substantiate the relevance of the 3 kHz resonance to acoustic absorption and to demonstrate means of improving mechanical properties for the sound absorption application. Previously reported loss factor data in the 100 Hz to 10 kHz range is substantiated by relevant but distinctly different measurements of loss shear modulus and loss permittivity. Furthermore cross-linking approaches are reported that result in increased elastic moduli by an order of magnitude to 4 × 106 Pa at 20% strain and increased break stress by two orders of magnitude to 1.3 × 107 Pa while exhibiting break stain values of several hundred per cent.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 774: Symposium O – Materials Inspired by Biology , 2003 , O3.5
Copyright
Copyright © Materials Research Society 2003

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References

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