Composites from Recycled HDPE and ZnO Nanopowder with Improved Insulation and Weathering Features for Cable Jacketing...

Area of Science:

• Materials Science
• Polymer Science
• Nanotechnology

Background:

• Polymer matrix composites are crucial for various industries.
• Recycled high-density polyethylene (HDPEr) offers a sustainable alternative to virgin HDPE.
• Enhancing polymer properties with nanoparticles is a key research area.

Purpose of the Study:

• To investigate the effects of zinc oxide nanoparticles (ZnO NPs) on HDPE/HDPEr composites.
• To evaluate the performance of different composite formulations under aging conditions.
• To identify the optimal composite formulation for improved mechanical, dielectric, and aging resistance.

Main Methods:

• Four composite formulations (M1-M4) with varying HDPE/HDPEr/ZnO NP ratios were prepared using melt injection molding.
• Samples were subjected to aging tests (humidity and heat) and characterized using SEM, XRD, UV-Vis, FTIR, water absorption, thermal, mechanical, and dielectric testing.
• Performance was evaluated in both unaged and aged states.

Main Results:

• The M2 formulation (48% HDPE, 47% HDPEr, 5% ZnO NP) exhibited the best overall performance.
• M2 demonstrated the highest aging resistance, with estimated lifetimes of 3891 hours (humidity) and 2361 hours (heat).
• M2 showed superior mechanical properties (hardness, elastic modulus) and stable dielectric properties, outperforming the M1 control sample.

Conclusions:

• The M2 composite formulation is optimal, effectively combining enhanced mechanical strength, stable dielectric properties, and significant resistance to moisture and heat.
• ZnO NPs incorporation into HDPE/HDPEr composites improves their durability and performance under harsh environmental conditions.
• This research provides a pathway for developing high-performance, sustainable polymer composites.