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Reversible Thermosensitive Biodegradable Polymeric Actuators Based on Confined Crystallization

Title data

Stroganov, Vladislav ; Al-Hussein, Mahmoud ; Sommer, Jens-Uwe ; Janke, Andreas ; Zakharchenko, Svetlana ; Ionov, Leonid:
Reversible Thermosensitive Biodegradable Polymeric Actuators Based on Confined Crystallization.
In: Nano Letters. Vol. 15 (11 March 2015) Issue 3 . - pp. 1786-1790.
ISSN 1530-6992
DOI: https://doi.org/10.1021/nl5045023

Abstract in another language

We discovered a new and unexpected effect of reversible actuation of ultrathin semicrystalline polymer films. The principle was demonstrated on the example of thin polycaprolactone-gelatin bilayer films. These films are unfolded at room temperature, fold at temperature above polycaprolactone melting point, and unfold again at room temperature. The actuation is based on reversible switching of the structure of the hydrophobic polymer (polycaprolactone) upon melting and crystallization. We hypothesize that the origin of this unexpected behavior is the orientation of polycaprolactone chains parallel to the surface of the film, which is retained even after melting and crystallization of the polymer or the “crystallization memory effect”. In this way, the crystallization generates a directed force, which causes bending of the film. We used this effect for the design of new generation of fully biodegradable thermoresponsive polymeric actuators, which are highly desirable for bionano-technological applications such as reversible encapsulation of cells and design of swimmers.

Further data

Item Type: Article in a journal
Refereed: Yes
Institutions of the University: Faculties > Faculty of Engineering Science > Professur Biofabrikation > Professur Biofabrikation - Univ.-Prof. Dr. Leonid Ionov
Faculties
Faculties > Faculty of Engineering Science
Faculties > Faculty of Engineering Science > Professur Biofabrikation
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 540 Chemistry
Date Deposited: 22 Jun 2017 15:28
Last Modified: 22 Jun 2017 15:28
URI: https://eref.uni-bayreuth.de/id/eprint/37763