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Remarkable shape memory effect of a natural biopolymer in aqueous environment

Paper ID Volume ID Publish Year Pages File Format Full-Text
5596 405 2015 9 PDF Available
Title
Remarkable shape memory effect of a natural biopolymer in aqueous environment
Abstract

Remarkable water-stimulated shape memory effect was revealed in a natural biopolymer of peacock's tail covert feathers of which the innate shape can almost be fully recovered after severe deformation by a short hydration step. The shape memory effect manifests a good stability of high recovery rate and ratio during cycles of deformation and subsequent recovery. Both strength and energy absorption efficiency of medullary foam can be recovered despite the apparent decrease in the first deformation stroke caused by structural damage. A kinetic model developed from non-equilibrium thermodynamic fluctuation theory was adopted to describe the shape recovery process by considering the viscoelastic relaxation. The effects of hydration on mechanical properties, recovery kinetics, activation process and dynamic mechanical behaviors were also evaluated. Mechanisms were explored based on the lubrication, swelling effect and structural changes of macromolecular chains or segments in terms of their mobility. This study is expected to aid in understanding the responses of natural biological materials to environmental stimuli and to provide useful information for synthetic shape memory materials from the bio-inspiration perspective.

Keywords
Shape memory; Viscoelasticity; Mechanical properties; Keratin; Biomimetic material
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Remarkable shape memory effect of a natural biopolymer in aqueous environment
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Publisher
Database: Elsevier - ScienceDirect
Journal: Biomaterials - Volume 65, October 2015, Pages 13–21
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us