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Controllable self-rolling of polyurethane/SiO2 film with differential density

Title data

Zhang, Yaoming ; Ionov, Leonid:
Controllable self-rolling of polyurethane/SiO2 film with differential density.
In: European Polymer Journal. Vol. 119 (2019) . - 32 - 36.
ISSN 0014-3057
DOI: https://doi.org/10.1016/j.eurpolymj.2019.07.004

Official URL: Volltext

Abstract in another language

In this paper we report a new kind of self-rolling polyurethane (PU) film with the vertical gradient structure – top solid PU layer and bottom PU/SiO2 hybrid layer. The differential swelling properties of these two layers allow the film to exhibit reversible shape transformation upon exposure to different solvents and their mixtures. We investigated correlation between shapes (tube/scroll/spiral) formed upon self-rolling and the size/shape of the films, fraction of silica particles, the aspect ratio of the film, and the external solvents. We have also found that Timoshenko bilayer model allows prediction of rolling behavior basing on properties of each layer. The reversible self-rolling behavior of the bilayer films with differential structure is expected to allow development of new actuator in the near future.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: Self-rolling; Controllable; Polyurethane; Silica particles; Differential structure
Institutions of the University: Faculties > Faculty of Engineering Science > Professur Biofabrikation
Faculties > Faculty of Engineering Science > Professur Biofabrikation > Professur Biofabrikation - Univ.-Prof. Dr. Leonid Ionov
Result of work at the UBT: No
DDC Subjects: 500 Science > 540 Chemistry
Date Deposited: 16 Oct 2019 06:39
Last Modified: 16 Oct 2019 06:39
URI: https://eref.uni-bayreuth.de/id/eprint/52772