Mechanical properties and surface roughness of polymer-based materials containing DCPD particles

Area of Science:

• Materials Science
• Biomaterials Engineering
• Nanotechnology

Background:

• Dicalcium phosphate dihydrate (DCPD) is a key biomaterial.
• Functionalization of DCPD particles can enhance material properties.
• Optimizing synthesis routes is crucial for tailored material performance.

Purpose of the Study:

• To synthesize TEGDMA-functionalized DCPD particles via different routes.
• To investigate the effect of synthesis parameters on particle characteristics.
• To evaluate the performance of functionalized DCPD particles in a resin matrix.

Main Methods:

• DCPD particles were synthesized using ammonium phosphate or calcium nitrate receptor solutions.
• TEGDMA functionalization was performed either ab initio or post-synthesis.
• Particles were characterized using XRD, pycnometry, BET surface area, and SEM.
• Resin composites containing 20 vol% DCPD particles were tested for degree of conversion, biaxial flexural strength, flexural modulus, and surface roughness.

Main Results:

• Calcium nitrate receptor solution with ab initio TEGDMA functionalization produced DCPD particles with larger surface areas.
• The CN_ab group exhibited biaxial flexural strength comparable to the control group.
• Higher particle surface area correlated with increased biaxial flexural strength.
• Degree of conversion, flexural modulus, and surface roughness were generally unaffected by the synthesis variables.

Conclusions:

• Synthesis route significantly impacts DCPD particle surface area and mechanical properties.
• Ab initio functionalization with calcium nitrate offers a promising method for enhancing DCPD particle performance.
• Tailoring DCPD particle synthesis can lead to improved biomaterial composites.