Preparation and Characterization of Polyvinylpyrrolidone/L-leucine Amino Acid–Modified Montmorillonite/Chiral Diacid–Functionalized Mg-Substituted Fluorapatite Nanocomposites by Ultrasonic-Assisted Rapid Process

ABSTRACT

In this work, the surface of synthetic nanosized Mg-substituted fluorapatite particles was modified with biodegradable diacid N-trimellitylimido-L-leucine as a coupling agent in methanol. Furthermore, different contents of N-trimellitylimido-L-leucine-modified Mg-substituted fluorapatite were doped into polyvinylpyrrolidone/L-leucine-modified montmorillonite material to prepare novel ternary polyvinylpyrrolidone/modified montmorillonite/N-trimellitylimido-L-leucine-Mg-substituted fluorapatite nanocomposites by an efficient sonication process. Nanocomposite containing 5 wt% modified montmorillonite and 3, 5, and 7 wt% N-trimellitylimido-L-leucine-modified Mg-substituted fluorapatite contents were prepared and labeled as polyvinylpyrrolidone/modified montmorillonite/N-trimellitylimido-L-leucine-Mg-substituted fluorapatite 3, polyvinylpyrrolidone/modified montmorillonite/N-trimellitylimido-L-leucine-Mg-substituted fluorapatite 5, and polyvinylpyrrolidone/modified montmorillonite/N-trimellitylimido-L-leucine-Mg-substituted fluorapatite 7, respectively. The structure and morphology of the aforesaid products were characterized by different analytical apparatuses.

GRAPHICAL ABSTRACT

KEYWORDS:

• Biodegradable coupling agent
• Mg-substituted fluorapatite
• nanocomposites
• polyvinylpyrrolidone
• surface modification
• ultrasonic-assisted rapid process

Acknowledgments

We wish to express our appreciation to the Research Affairs Division Isfahan University of Technology (IUT), Iran, Isfahan, for partial financial support. Further financial support from Iran Nanotechnology Initiative Council (INIC), National Elite Foundation (NEF), and Center of Excellence in Sensors and Green Chemistry Research (IUT) is thankfully acknowledged.