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Polysaccharide Hydrogels Doped with MXenes for Possible Biomedical Applications.

Katarzyna Suchorowiec1, Justyna Kasznik1, Anastasiia Stepura2

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This study explores polysaccharide-based MXene hydrogels using alginate and gellan gum. Dehydration methods significantly alter hydrogel structure and properties for tailored biomedical applications.

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Area of Science:

  • Materials Science
  • Biomedical Engineering
  • Nanotechnology

Background:

  • MXenes are 2D transition-metal carbides/nitrides with tunable surface groups and multifunctional properties, attracting biomedical interest.
  • Hydrogels offer biocompatibility and tissue-like structures, but polysaccharide-based MXene hydrogels are underexplored.
  • Polysaccharides like alginate and gellan gum offer biodegradability and biomedical relevance.

Purpose of the Study:

  • To develop polysaccharide/MXene hydrogels using sodium alginate (ALG)-gellan gum (GG) blend.
  • To investigate the influence of conventional drying versus freeze-drying on hydrogel characteristics.
  • To tailor MXene-modified hydrogels for specific biomedical applications.

Main Methods:

  • Incorporation of MXene nanosheets into an ALG-GG blend.
  • Application of two dehydration methods: conventional drying and freeze-drying.
  • Characterization of composite properties: microstructure, surface roughness, mechanical behavior, water states, and thermal stability.

Main Results:

  • Conventionally dried nanocomposites (1.0% wt. MXene) showed reduced swelling (~60%) and volume change (~40%) compared to the blend.
  • Freeze-dried nanocomposite hydrogels exhibited a porous, interconnected network suitable for high surface area applications.
  • Conventionally dried samples displayed compact, smooth structures with enhanced barrier and mechanical performance.

Conclusions:

  • Dehydration strategy critically influences polymer network architecture, water states, and material functionality.
  • Tailoring hydrogel properties is achievable by selecting appropriate dehydration methods.
  • Developed polysaccharide/MXene hydrogels offer tunable properties for diverse biomedical applications.