Multifunctional Self-Assembled Block Copolymer/Iron Oxide Nanocomposite Hydrogels Formed from Wormlike Micelles

Area of Science:

• Materials Science
• Polymer Chemistry
• Nanotechnology

Background:

• Wormlike micelles offer unique self-assembly properties for advanced material design.
• Developing multifunctional hydrogels with magnetic responsiveness and tunable properties is crucial for various applications.

Purpose of the Study:

• To prepare multifunctional magnetic nanocomposite hydrogels from wormlike micelles.
• To investigate the impact of iron oxide nanoparticles and graphene oxide (GO) on hydrogel properties.
• To explore the potential applications of these novel hydrogels in engineering and biomedicine.

Main Methods:

• Incorporation of iron oxide nanoparticles and GO into a temperature-responsive block copolymer (poly(glycerol monomethacrylate)-b-poly(2-hydroxypropyl methacrylate)) at low temperatures.
• Characterization of the resulting nanocomposite gels' magnetic, thermal, mechanical, and rheological properties.
• Evaluation of the gels' adhesive, sensing, self-healing, injectability, and biocompatibility characteristics.

Main Results:

• The nanocomposite hydrogels exhibited enhanced gel strength and a strong magnetic response.
• Materials retained thermoresponsiveness, allowing for tunable solid-to-liquid transitions.
• Adjustable mechanical properties, strain/temperature sensing capabilities, and efficient self-healing (approx. 100% within seconds) were demonstrated.
• Injectability and good biocompatibility were confirmed, with no significant adverse impact from nanomaterials.

Conclusions:

• Multifunctional magnetic nanocomposite hydrogels can be successfully prepared from wormlike micelles.
• These adaptable materials possess tunable properties, magnetic responsiveness, and excellent self-healing capabilities.
• The hydrogels are suitable for 3D printing and show significant potential for biomedical applications as injectable, magnetic-responsive materials.