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An Additive Manufacturing Technique for the Facile and Rapid Fabrication of Hydrogel-based Micromachines with Magnetically Responsive Components
Published on: July 18, 2018
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A versatile approach towards multi-functional surfaces via covalently attaching hydrogel thin layers.
Min He1, Huiyi Jiang1, Rui Wang1
1College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, People's Republic of China.
Journal of Colloid and Interface Science
|September 4, 2016
Summary
Researchers developed a simple method to covalently attach functional hydrogel layers to surfaces. These stable, tunable hydrogel coatings offer advanced antifouling, blood compatibility, and antibacterial properties for biomedical applications.
Area of Science:
- Materials Science
- Biomedical Engineering
- Surface Chemistry
Background:
- Developing advanced materials with tailored surface properties is crucial for biomedical applications.
- Existing surface modification techniques often lack robustness or multi-functionality.
- Hydrogel coatings offer biocompatibility but achieving stable, covalent attachment remains a challenge.
Purpose of the Study:
- To present a straightforward and robust method for covalently attaching multi-functional hydrogel thin layers onto various substrates.
- To demonstrate the controlled formation and long-term stability of these hydrogel layers.
- To functionalize polyether sulfone (PES) membranes with specific hydrogel coatings for distinct biomedical properties.
Main Methods:
- Introduction of double bonds onto substrate surfaces to create anchoring points.
- Surface-initiated cross-linking copolymerization of immobilized double bonds with functional monomers (SBMA, SAS, METAC).
- Characterization of hydrogel layer thickness, stability, and surface properties.
Main Results:
- Successfully formed stable, covalently attached hydrogel thin layers with controllable thickness on PES membranes.
- Sulfobetaine methacrylate (PSBMA) hydrogel layers demonstrated excellent antifouling and bacteria resistance.
- Sodium allysulfonate (PSAS) hydrogel layers rendered the membrane surface incoagulable with blood (APTT > 600s).
- Methyl acryloyloxygen ethyl trimethyl ammonium chloride (PMETAC) hydrogel layers exhibited potent antibacterial activity.
Conclusions:
- The proposed method provides a versatile platform for surface modification with functional hydrogels.
- The developed hydrogel coatings offer significant improvements in biocompatibility and performance for biomedical applications.
- This technique holds great potential for designing advanced materials for blood purification, drug delivery, wound dressings, and biosensors.
