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Calcium phosphate nanoparticles functionalized with a dimethacrylate monomer.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Biomaterials Engineering

Background:

  • Calcium phosphate nanoparticles are crucial in various applications.
  • Particle agglomeration and poor matrix compatibility hinder their use.
  • Functionalization offers a route to enhance nanoparticle properties.

Purpose of the Study:

  • To synthesize triethylene glycol dimethacrylate (TEGDMA) functionalized dicalcium phosphate dihydrate (DCPD) nanoparticles.
  • To reduce agglomeration and improve compatibility with vinyl-based resin matrices.
  • To characterize the functionalized nanoparticles and elucidate the functionalization mechanism.

Main Methods:

  • Synthesis of DCPD nanoparticles with TEGDMA.
  • Characterization using X-ray diffraction (XRD), FTIR, elemental analysis, TGA, TEM, DLS, and BET.
  • Comparison with bare DCPD nanoparticles and proprietary controls.

Main Results:

  • TEGDMA functionalization confirmed by elemental analysis and TGA (8.5% mass fraction).
  • XRD showed similar crystalline structure to controls.
  • Functionalized nanoparticles exhibited 3-11 times higher surface area and lower agglomeration (DLS).

Conclusions:

  • TEGDMA successfully functionalized DCPD nanoparticles.
  • Proposed chemisorption mechanism involving ion-dipole interactions.
  • Enhanced surface area and reduced agglomeration indicate improved matrix compatibility.