TY  - JOUR
U1  - Wissenschaftlicher Artikel
A1  - Han, Lu
A1  - Zheng, Yijun
A1  - Luo, Hao
A1  - Feng, Jun
A1  - Engstler, Roxanne
A1  - Xue, Lulu
A1  - Jing, Guangyin
A1  - Deng, Xu
A1  - del Campo Bécares, Aránzazu
A1  - Cui, Jiaxi
T1  - Macroscopic self-evolution of dynamic hydrogels to create hollow interiors
JF  - Angewandte Chemie International Edition
N2  - A solid-to-hollow evolution in macroscopic structure is challenging in synthetic materials. Herein we report a fundamentally new strategy for guiding macroscopic, unidirectional shape-evolution of materials without compromising the material’s integrity, 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. We demonstrate this concept by 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 including spheres, helix tubes, and cubes with different diameters, for different applications.
Y1  - 2020
UN  - https://nbn-resolving.org/urn:nbn:de:bsz:291:415-3546
SN  - 1433-7851
SS  - 1433-7851
U6  - https://doi.org/10.1002/anie.201913574
DO  - https://doi.org/10.1002/anie.201913574
VL  - 59
IS  - 14
SP  - 5611
EP  - 5615
ER  -