IIT Mandi Researchers Innovate Eco-Friendly Electromagnetic Interference Shielding Solution

Researchers at IIT Mandi have crafted custom biodegradable composite materials enriched with natural fibres, designed to cater to diverse application needs. Know details here 

Researchers from the Indian Institute of Technology (IIT) Mandi have manufactured biodegradable composite materials infused with natural fibres, specifically customised for a range of applications, with a particular focus on Electromagnetic Interference (EMI) shielding. 

For EMI shielding, the composite must be an electrical conductor. The researchers incorporated carbon nanotubes (CNTs) to confer electrical conductivity to their composite. A blend of 16% kenaf fibre and 5% CNTs was found to exhibit superior EMI shielding, surpassing 30 dB, and exceptional mechanical strength.

Composite materials, blending two or more substances, have been utilized since ancient times. Clay and straw, among other materials, were historically combined to create composite bricks for construction. Today, natural fibre-reinforced composites, such as Jute and Hemp, are making a comeback due to environmental concerns, finding diverse applications in different sectors.

Electromagnetic Interference

Composites find growing application in Electromagnetic Interference (EMI) shielding, an area witnessing escalating usage. The surge in electronic device proliferation has found a novel pollution type termed Electromagnetic Interference, impacting the operation of electronic systems spanning radar, military control, and networking sectors. EMI shielding materials play a crucial role in safeguarding electronic devices and systems against such interference.

Speaking about the developed composite, Dr Himanshu Pathak, Associate Professor, School of Mechanical and Materials Engineering, IIT Mandi, said, "Cultivating a sustainable future demands innovation that enhances performance while minimizing environmental impact. Our work in developing eco-friendly EMI shielding materials combines technological advancement with ecological responsibility."

Speaking about the applications of the developed composite, Dr Sunny Zafar, Associate Professor, School of Mechanical and Materials Engineering, IIT Mandi, said, “The developed composite holds immense promise for real-world applications, ranging from electronic equipment casing to overhead bins and unmanned aerial vehicles (UAVs). The composite’s versatility and sustainability make it an asset in addressing contemporary challenges while promoting environmental responsibility.” 

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