The Indian Institute of Technology (IIT) Mandi has announced the creation of an innovative composite material incorporating biodegradable natural fibers designed to shield against electromagnetic interference (EMI). EMI, a consequence of the widespread use of electronic devices, poses a significant threat to various electronic systems, including radar, military controls, and network infrastructure. Effective EMI shielding materials are crucial for safeguarding these systems from such interference.

A breakthrough composite material developed by researchers at IIT Mandi combines kenaf fiber, locally known as Deccan Hemp or Ambari, with High-Density Polyethylene (HDPE). This eco-friendly blend not only boasts excellent electromagnetic interference (EMI) shielding capabilities but also stands out for its recyclability.

The integration of kenaf, a natural fiber prized for its robustness and lightweight, serves as an ideal reinforcement component in the composite, enhancing its mechanical attributes and reducing its environmental footprint. Moreover, the inclusion of High-Density Polyethylene (HDPE), a widely utilized recyclable plastic, further bolsters the composite's eco-conscious profile. Notably, the team has incorporated carbon nanotubes to confer electrical conductivity, thereby optimizing the composite for effective electromagnetic interference (EMI) shielding.

In their composite development, the researchers introduced carbon nanotubes (CNTs) to impart electrical conductivity. Their investigation revealed that a combination comprising 16 percent kenaf fiber and 5 percent CNTs demonstrated remarkable electromagnetic interference (EMI) shielding, exceeding 30 dB, alongside outstanding mechanical resilience.

“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", said Dr Himanshu Pathak, Associate Professor, School of Mechanical and Materials Engineering, IIT Mandi.

The study, recently published in the journal Polymer Composites, highlights the extensive application prospects of this pioneering composite material. Ranging from electronic equipment casings to overhead bins and unmanned aerial vehicles (UAVs), the research unveils the wide-reaching potential of this innovative solution.