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Updated: Jun 21, 2025

Application of a Coupling Agent to Improve the Dielectric Properties of Polymer-Based Nanocomposites

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Published on: September 19, 2020

Enhanced High-Performance iPP/TPU/MWCNT Nanocomposite for Electromagnetic Interference Shielding.

Yanru Li¹, Wenting Yu¹, Qian Ruan¹

¹School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, China.

|July 13, 2024

Summary

This summary is machine-generated.

Researchers developed advanced nanocomposites using melt blending for superior electromagnetic shielding. These materials effectively combat electromagnetic pollution, offering a promising solution for electronic devices.

Keywords:

EMI shielding property bicontinuous structure iPP/TPU/MWCNTs melt blending polypropylene-based nanocomposites

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Area of Science:

Materials Science
Nanotechnology
Polymer Science

Background:

Electronic communication advancements have increased electromagnetic pollution.
Effective electromagnetic shielding materials are crucial for mitigating this issue.
Nanocomposites offer potential for high-performance shielding applications.

Purpose of the Study:

To prepare and characterize iPP/TPU/MWCNT nanocomposites for electromagnetic shielding.
To investigate the effect of PP-g-MAH on interfacial compatibility.
To optimize the structure and composition for enhanced electromagnetic shielding efficiency.

Main Methods:

Melt blending was used to synthesize polypropylene (iPP)/thermoplastic polyurethane (TPU)/multi-walled carbon nanotube (MWCNT) nanocomposites.
Maleic anhydride-grafted polypropylene (PP-g-MAH) was added to improve interfacial adhesion.
The iPP/TPU ratio and MWCNT concentration were systematically varied.

Main Results:

A double continuous structure was achieved with an iPP/TPU ratio of 4:6.
Selective distribution of MWCNTs in the TPU matrix formed conductive networks.
The optimized nanocomposite achieved a maximum EMI shielding efficiency of 37.8 dB with 10 wt.% MWCNTs.

Conclusions:

Melt blending is a feasible method for creating high-performance electromagnetic shielding nanocomposites.
Interfacial compatibility and conductive network formation are key to enhancing shielding effectiveness.
The developed iPP/TPU/MWCNT nanocomposites show significant potential for electromagnetic pollution mitigation.