AReversible Semicrystalline Polymeric Actuators
Final Report Abstract
In summary, within the project, we investigated mechanism of behavior of bidirectional shape memory polymers (chemically and physically semicrystalline polymers) at constant stress and constant strain conditions upon thermal cycling around melting/crystallization temperature. We have performed experiments and computer simulations to understand of the mechanism of actuation, physicochemical process occurring during it and elucidation of ways to influence actuation behavior. The simulations revealed the origin of the temperature hysteresis and indicated the role of mobility in the crystalline phase. These findings are of high importance for further development of bidirectional shape-memory polymers because they are among few kinds of actuating materials demonstrating large actuation amplitude independently of environment. The obtained knowledge is now used within other projects supported by DFG aiming to develop advanced actuating structures for biomedical applications as well as for design of switchable surfaces.
Publications
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Shape-morphing architectures actuated by Janus fibers. Soft Matter, 16(8), 2086-2092.
Zakharov, Andrei; Pismen, Len M. & Ionov, Leonid
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Crystallization of Polymers under the Influence of an External Force Field. Polymers, 13(13), 2078.
Payal, Rajdeep Singh & Sommer, Jens-Uwe
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Materials for Smart Soft Actuator Systems. Chemical Reviews, 122(1), 1349-1415.
Apsite, Indra; Salehi, Sahar & Ionov, Leonid
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Two-Way Shape Memory Polymers: Evolution of Stress vs Evolution of Elongation. Macromolecules, 54(12), 5838-5847.
Murcia, Andrés Posada; Gomez, Juan Manuel Uribe; Sommer, Jens-Uwe & Ionov, Leonid
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A thermo-, near-infrared light- and water-induced shape memory polymer with healing fatigued shape memory performance. Materials Chemistry Frontiers, 6(9), 1218-1227.
Bai, Yongkang & Ionov, Leonid
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Mechanism of Behavior of Two-Way Shape Memory Polymer under Constant Strain Conditions. Macromolecules, 55(5), 1680-1689.
Posada-Murcia, Andrés; Uribe-Gomez, Juan Manuel; Förster, Stephan; Sommer, Jens-Uwe; Dulle, Martin & Ionov, Leonid
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Smart Mechanically Tunable Surfaces with Shape Memory Behavior and Wetting-Programmable Topography. ACS Applied Materials & Interfaces, 14(17), 20208-20219.
Constante, Gissela; Apsite, Indra; Auerbach, Paul; Aland, Sebastian; Schönfeld, Dennis; Pretsch, Thorsten; Milkin, Pavel & Ionov, Leonid
