Transparent and High-Refractive-Index Titanium Dioxide/Thermoplastic Polyurethane Nanocomposites.

Area of Science:

• Materials Science
• Polymer Science
• Nanotechnology

Background:

• Developing advanced nanocomposite films requires effective nanoparticle dispersion and surface modification.
• Titanium dioxide nanoparticles offer unique optical and mechanical properties.
• Thermoplastic polyurethane provides a flexible and durable polymer matrix.

Purpose of the Study:

• To prepare transparent nanocomposite films with enhanced refractive index and mechanical properties.
• To investigate the effect of different surface modification agents on nanoparticle dispersion and film performance.
• To establish a facile method for producing high-performance nanocomposite films.

Main Methods:

• Fabrication of nanocomposite films using a film casting approach.
• Surface modification of titanium dioxide nanoparticles with oleic acid and mPEO-5000.
• Characterization of nanoparticle dispersion, refractive index, and mechanical properties.

Main Results:

• All nanocomposite films demonstrated significantly enhanced refractive index and mechanical properties compared to the neat polymer.
• Excellent dispersion of nanoparticles within the polymer matrix was achieved, preventing aggregation.
• The use of bimodal surface modification enhanced film properties.

Conclusions:

• Transparent nanocomposite films with tunable mechanical properties and high refractive indices can be successfully prepared.
• Surface modification of titanium dioxide nanoparticles is crucial for achieving good dispersion and enhanced performance.
• The developed method offers a feasible route for creating advanced nanocomposite materials for various applications.