Soft Viscoelastic Magnetic Hydrogels from the In Situ Mineralization of Iron Oxide in Metal-Coordinate Polymer Networks
Name
song-et-al-2023-soft-viscoelastic-magnetic-hydrogels-from-the-in-situ-mineralization-of-iron-oxide-in-metal-coordinate.pdf
Size
1.79 MB
Format
Adobe PDF
Checksum (MD5)
3827b5948f09b9cefed2690334687b78
Author(s)
Song, Jake
Kim, Sungjin
Saouaf, Olivia
Owens, Crystal
McKinley, Gareth H.
Holten-Andersen, Niels
Date Issued
November 2, 2023
Journal
ACS Applied Materials & Interfaces
Publisher
American Chemical Society
Citation
ACS Appl. Mater. Interfaces 2023, 15, 45, 52874–52882.
Version
Final published version
Abstract
The design of soft magnetic hydrogels with high concentrations of magnetic particles is complicated by weak retention of the iron oxide particles in the hydrogel scaffold. Here, we propose a design strategy that circumvents this problem through the in situ mineralization of iron oxide nanoparticles within polymer hydrogels functionalized with strongly iron-coordinating nitrocatechol groups. The mineralization process facilitates the synthesis of a high concentration of large iron oxide nanoparticles (up to 57 wt % dry mass per single cycle) in a simple one-step process under ambient conditions. The resulting hydrogels are soft (kPa range) and viscoelastic and exhibit strong magnetic actuation. This strategy offers a pathway for the energy-efficient design of soft, mechanically robust, and magneto-responsive hydrogels for biomedical applications.
Subjects
General Materials Science
MIT Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
Massachusetts Institute of Technology. Department of Materials Science and Engineering
Terms of Use
Creative Commons Attribution-NonCommercial-NoDerivs License
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1021/acsami.3c08145
