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Title: Macroscopic Self-Evolution of Dynamic Hydrogels to Create Hollow Interiors
Authors: Han, L.Zheng, Y.Luo, H.Feng, J.Engstler, R.Xue, L.Jing, G.Deng, X.del Campo, A.Cui, J.
Publishers Version:
Issue Date: 2020
Published in: Angewandte Chemie - International Edition Vol. 59 (2020), No. 14
Publisher: Weinheim : Wiley-VCH Verlag
Abstract: A solid-to-hollow evolution in macroscopic structures is challenging in synthetic materials. A fundamentally new strategy is reported for guiding macroscopic, unidirectional shape evolution of materials without compromising the material's integrity. This strategy is based on the creation of a field with a “swelling pole” and a “shrinking pole” to drive polymers to disassemble, migrate, and resettle in the targeted region. This concept is demonstrated using dynamic hydrogels containing anchored acrylic ligands and hydrophobic long alkyl chains. Adding water molecules and ferric ions (Fe3+) to induce a swelling–shrinking field transforms the hydrogels from solid to hollow. The strategy is versatile in the generation of various closed hollow objects (for example, spheres, helix tubes, and cubes with different diameters) for different applications.
Keywords: gels; hollow interiors; hydrophobic effects; macroscopic self-evolution; Gels; Hydrophobicity; Molecules; Poles; Swelling; Ferric ions; Hydrophobic effect; Long alkyl chains; Macroscopic structure; Self- evolutions; Shape evolution; Synthetic materials; Water molecule; Hydrogels
DDC: 540
License: CC BY-NC 4.0 Unported
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Appears in Collections:Chemie

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