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Bioactive organic/inorganic hybrids with improved mechanical performance.

Ailing Li1, Hong Shen, Huihui Ren

  • 1Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Polymer Physics and Chemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China. dqiu@iccas.ac.cn.

Journal of Materials Chemistry. B
|April 9, 2020
PubMed
Summary

New sol-gel functionalized hybrids offer excellent mechanical properties and bioactivity for bone regeneration. These materials show potential for bone repair applications due to their strength and ability to form apatite.

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Area of Science:

  • Biomaterials Science
  • Materials Chemistry
  • Tissue Engineering

Background:

  • Developing bioactive materials for bone regeneration is crucial.
  • Poly-ethylene glycol (PEGM)/SiO2-CaO hybrids offer potential but require mechanical and bioactive enhancement.
  • Existing unmodified hybrids lack the necessary durability and bioactivity.

Purpose of the Study:

  • To prepare and characterize novel sol-gel functionalized PEGM/SiO2-CaO hybrids.
  • To investigate the impact of organic/inorganic ratios and PEG molecular weights on hybrid properties.
  • To evaluate the bioactivity and mechanical performance for bone regeneration applications.

Main Methods:

  • Sol-gel synthesis of PEGM/SiO2-CaO hybrids with interpenetrating networks.
  • Varying organic/inorganic ratios and polyethylene glycol (PEG) molecular weights.
  • Mechanical testing (compressive strength, Young's modulus) and bioactivity assessment (apatite formation in simulated body fluid).

Main Results:

  • Epoxy-modified hybrids exhibited superior mechanical properties and bioactivity compared to unmodified ones.
  • Higher molecular weight PEGM hybrids (PEGM600) showed increased compressive strength and Young's modulus.
  • Apatite formation occurred within 24 hours, with enhanced formation in PEGM600 and higher organic/inorganic ratio hybrids (70:30, 60:40).
  • Optimal mechanical strength and bioactivity were observed in 60:40 PEGM600 hybrids, comparable to cortical bone.

Conclusions:

  • Sol-gel functionalized PEGM/SiO2-CaO hybrids demonstrate promising bioactivity and mechanical strength.
  • The 60:40 PEGM600 hybrid composition offers an optimal balance for bone regeneration.
  • These advanced hybrids hold significant potential for use in bone tissue engineering and regenerative medicine.