Recycled Polypropylene/Strontium Ferrite Polymer Composite Materials with Electromagnetic Shielding Properties.

Area of Science:

• Materials Science
• Polymer Science
• Electromagnetics

Background:

• Electric vehicles require enhanced electromagnetic shielding for internal electronics.
• Electromagnetic radiation from external sources poses a risk to automotive electronics.
• Recycled materials offer a sustainable solution for automotive components.

Purpose of the Study:

• To develop and characterize recycled polypropylene/strontium ferrite composites for electromagnetic shielding.
• To evaluate the mechanical, dielectric, and magnetic properties of these composites.
• To assess their effectiveness in shielding electromagnetic radiation for automotive applications.

Main Methods:

• Polymer composite synthesis via extrusion and melt injection.
• Characterization of mechanical, dielectric, and thermal properties.
• Microstructure analysis and electromagnetic shielding efficiency (SE) testing.

Main Results:

• Composites showed improved mechanical, dielectric, and magnetic properties compared to pure polypropylene.
• All composites exhibited reflective shielding properties (SE_R from -71.5 dB to -56.7 dB).
• The PP/SrFe₁₂O₁₉ powder composite (70/30 ratio) was the most effective shield.

Conclusions:

• Recycled PP/SrFe₁₂O₁₉ composites are promising for automotive electromagnetic shielding.
• The 70/30 powder composite offers superior performance against electromagnetic pollution.
• These materials support the development of new electric vehicles with enhanced electronic protection.