Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 408081
Title Shape-Memory Effects in Biopolymer Networks with Collagen-Like Transient Nodes
Author(s) Skrzeszewska, P.J.; Jong, L.N.; Wolf, F.A. de; Stuart, M.A.C.; Gucht, J. van der
Source Biomacromolecules 12 (2011)6. - ISSN 1525-7797 - p. 2285 - 2292.
Department(s) Physical Chemistry and Colloid Science
BBP Bioconversion
Publication type Refereed Article in a scientific journal
Publication year 2011
Keyword(s) polymer networks - triblock copolymers - hydrogels - proteins - release
Abstract In this article we study shape-memory behavior of hydrogels, formed by biodegradable and biocompatible recombinant telechelic polypeptides, with collagen-like end blocks and a random coil-like middle block. The programmed shape of these hydrogels was achieved by chemical cross-linking of lysine residues present in the random coil. This led to soft networks, which can be stretched up to 200% and “pinned” in a temporary shape by lowering the temperature and allowing the collagen-like end blocks to assemble into physical nodes. The deformed shape of the hydrogel can be maintained, at room temperature, for several days, or relaxed within a few minutes upon heating to 50 °C or higher. The presented hydrogels could return to their programmed shape even after several thermomechanical cycles, indicating that they remember the programmed shape. The kinetics of shape recovery at different temperatures was studied in more detail and analyzed using a mechanical model composed of two springs and a dashpot.
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