Piezoelectric Films Based on Polyethylene Modified by Aluminosilicate Filler

Area of Science:

• Materials Science
• Polymer Science
• Nanotechnology

Background:

• Miniaturization and universality of electronic devices drive the need for novel piezoelectric materials.
• Polymers are emerging as key candidates for advanced piezoelectric applications.

Purpose of the Study:

• To develop and characterize novel piezoelectric polymer composites.
• To investigate the influence of filler content and film orientation on material properties.

Main Methods:

• Composites synthesized using extrusion of high-density polyethylene (HDPE) or medium-density polyethylene (MDPE) with aluminosilicate fillers.
• Polarization achieved via a 100 V/μm electric field, creating flexible electret films.
• Characterization included scanning electron microscopy (SEM), X-ray diffraction (XRD), tensile testing, and thermogravimetry.

Main Results:

• Optimized composite morphology with well-dispersed fillers and controlled porosity was achieved.
• HDPE composite with 5% aluminosilicate filler exhibited superior piezoelectric coefficients, mechanical strength, and thermal stability.
• Film orientation significantly impacted piezoelectric properties.

Conclusions:

• The developed HDPE-based piezoelectric composites demonstrate potential for electronic device applications.
• The 5% aluminosilicate filler concentration in HDPE offers an optimal balance of properties.
• Further research into film orientation effects could enhance piezoelectric performance.