Shape-programmable architectured hydrogels sensitive to ultrasound
- On-demand motion of highly swollen polymer systems can be triggered by changes in pH, ion concentrations, or by heat. Here, shape-programmable, architectured hydrogels are introduced, which respond to ultrasonic-cavitation-based mechanical forces (CMF) by directed macroscopic movements. The concept is the implementation and sequential coupling of multiple functions (swellability in water, sensitivity to ultrasound, shape programmability, and shape-memory) in a semi-interpenetrating polymer network (s-IPN). The semi-IPN-based hydrogels are designed to function through rhodium coordination (Rh-s-IPNH). These coordination bonds act as temporary crosslinks. The porous hydrogels with coordination bonds (degree of swelling from 300 +/- 10 to 680 +/- 60) exhibit tensile strength sigma(max) up to 250 +/- 60 kPa. Shape fixity ratios up to 90% and shape recovery ratios up to 94% are reached. Potential applications are switches or mechanosensors.
| Author details: | Pengfei Zhang, Marc BehlORCiDGND, Maria BalkGND, Xingzhou PengGND, Andreas LendleinORCiDGND |
|---|---|
| DOI: | https://doi.org/10.1002/marc.201900658 |
| ISSN: | 1022-1336 |
| ISSN: | 1521-3927 |
| Pubmed ID: | https://pubmed.ncbi.nlm.nih.gov/32037625 |
| Title of parent work (English): | Macromolecular rapid communications |
| Publisher: | Wiley-VCH |
| Place of publishing: | Weinheim |
| Publication type: | Article |
| Language: | English |
| Date of first publication: | 2020/02/10 |
| Publication year: | 2020 |
| Release date: | 2024/01/10 |
| Tag: | cavitation-based mechanical force; rhodium-phosphine coordination bonds; semi-IPN hydrogels; shape-memory effect |
| Volume: | 41 |
| Issue: | 7 |
| Article number: | 1900658 |
| Number of pages: | 7 |
| Funding institution: | Helmholtz AssociationHelmholtz Association; Tianjin; University-Helmholtz-Zentrum Geesthacht Joint Laboratory for; Biomaterials and Regenerative Medicine - German Federal Ministry of; Education and Research (BMBF)Federal Ministry of Education & Research; (BMBF) [0315496]; Chinese Ministry of Science and Technology; (MOST)Ministry of Science and Technology, China [2008DFA51170] |
| Organizational units: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Chemie |
| DDC classification: | 5 Naturwissenschaften und Mathematik / 54 Chemie / 540 Chemie und zugeordnete Wissenschaften |
| Peer review: | Referiert |
| Publishing method: | Open Access / Hybrid Open-Access |
| License (German): |  CC-BY - Namensnennung 4.0 International |
