Functional iron oxide nanoparticles as reversible crosslinks for magnetically addressable shape-memory polymers
Abstract
Shape‐memory nanocomposites are reported, in which super‐paramagnetic iron oxide nanoparticles (SPIONs) serve as both the crosslinks of a macromolecular network and inductive heating elements. SPIONs capped with polymerizable groups are synthesized in a one‐step reaction by oxidation of Fe(acac)3 in the presence of 5‐norbornene‐2‐carboxylic acid. Between 0.1 and 20 wt% of the resulting Fe3O4 nanoparticles are subsequently copolymerized with norbornene by ring‐opening metathesis polymerization (ROMP) using Grubbs' 1st‐generation catalyst. This affords a series of crosslinked polynorbornenes in which the Fe3O4 nanoparticles are very well dispersed. The reversible nature of the non‐covalent binding of the polymerizable ligands to the Fe3O4 nanoparticles allows melting and processing of these materials at elevated temperature, with the shape‐memory properties are only retained for high Fe3O4 content. image
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The functionalized NPs acted as cross-links and magnetic-induction heaters in the macromolecular network architecture where the polymer was in amorphous state.
“The functionalized NPs acted as cross-links and magnetic-induction heaters in the macromolecular network architecture where the polymer was in amorphous state.”
From Shape-memory polymers for multiple applications in the materials world (2016) · cites this paper as [163]
In 2014 Bai et al. developed a one-pot synthesis of norbornene-capped super-paramagnetic iron oxide NPs and their integration into polynorbornene by ring-opening metathesis polymerization.
“In 2014 Bai et al. developed a one-pot synthesis of norbornene-capped super-paramagnetic iron oxide NPs and their integration into polynorbornene by ring-opening metathesis polymerization of norbornene in the presence of the NPs [163].”
From Shape-memory polymers for multiple applications in the materials world (2016) · cites this paper as [163]
The shape-memory behavior depended on the NPs content: better results for the lower Fe3O4 containing materials (up to 1 wt%).
“Those depended on the NPs content: better results for the lower Fe3O4 containing materials (up to 1 wt%).”
From Shape-memory polymers for multiple applications in the materials world (2016) · cites this paper as [163]
The reversible nature of the non-covalent binding of the polymerizable ligands to the Fe3O4 nanoparticles was strong enough to bestow the materials with the ability to form appropriately strong networks that exhibit shape-memory behavior.
“The reversible nature of the non-covalent binding of the polymerizable ligands to the Fe3O4 nanoparticles was strong enough to bestow the materials with the ability to form appropriately strong networks that exhibit shape-memory behavior.”
From Shape-memory polymers for multiple applications in the materials world (2016) · cites this paper as [163]
The nanocomposites were characterized by a superparamagnetic response, with saturation magnetization of around 2 and 5 emu/g for the nanocomposites with 10 and 20 wt% Fe3O4, respectively.
“The nanocomposites were characterized by a superparamagnetic response, with saturation magnetization of around 2 and 5 emu/g for the nanocomposites with 10 and 20 wt% Fe3O4, respectively.”
From Shape-memory polymers for multiple applications in the materials world (2016) · cites this paper as [163]
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- Authors
- Bai, S., Zou, H., Dietsch, H., Simon, Y. C., & Weder, C.
- Affiliations
- University of Fribourg (CH)
- Corresponding author
- Dietsch, Hervé
- Simon, Yoan C.
- Venue
- Macromolecular Chemistry and Physics
- Publisher
- Wiley
- Published
- 2014-02-04
- Volume
- 215
- Issue
- 5
- Pages
- 398-404
- ISSN
- 1022-1352 (ISSN-L)
- 1521-3935
- OpenAlex
- W1998079585
- Cited by
- 33
- References
- 27
- Citations by year
- 2025: 4 · 2024: 2 · 2023: 2 · 2022: 2 · 2021: 2 · 2020: 2 · 2019: 3 · 2018: 2 · 2017: 1 · 2016: 4 · 2015: 5 · 2014: 4
- FWCI
- 3.26
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Macromolecular Chemistry and Physics (publishedVersion)
- Topics
- Physical Sciences › Materials Science › Polymers and Plastics › Polymer composites and self-healing
- Physical Sciences › Engineering › Mechanical Engineering › Advanced Materials and Mechanics
- Physical Sciences › Chemistry › Organic Chemistry › Advanced Polymer Synthesis and Characterization
- Keywords
- shape memory polymers, iron oxide nanoparticles, superparamagnetic nanoparticles, reversible crosslinking, magnetic actuation, polynorbornene, ring-opening metathesis polymerization, magnetic nanocomposites, induction heating
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