Modern Electromagnetic-Radiation-Shielding Materials Made Using Different Knitting Techniques

Area of Science:

• Materials Science
• Textile Engineering
• Electromagnetics

Background:

• Growing concerns about the potential negative health impacts of electromagnetic fields (EMFs).
• Need for effective and wearable shielding solutions to protect the human body.
• Exploration of advanced materials for electromagnetic shielding applications.

Purpose of the Study:

• To investigate the feasibility of using knitted textile barriers for electromagnetic field (EMF) shielding.
• To evaluate the impact of various structural parameters and materials on shielding effectiveness.
• To determine the optimal fabric design for protecting the human body from EMFs.

Main Methods:

• Design and manufacturing of ten knitted fabric variants using conductive yarns (steel, copper).
• Characterization of fabric structural parameters (density, thickness, porosity, etc.) using standard knitting research methods.
• Measurement of shielding effectiveness for electromagnetic fields at 2-4 GHz and 4-7 GHz frequencies in both wale and course directions.

Main Results:

• Shielding effectiveness varied significantly across the ten tested knitted fabric variants.
• Key structural parameters influencing shielding included stitch pattern, yarn type, course and wale density, and surface porosity.
• Higher shielding effectiveness was observed for certain fabric constructions and conductive materials.

Conclusions:

• Knitted textile barriers offer a promising approach for electromagnetic field shielding.
• Fabric structural design and material composition are critical factors in achieving effective EMF protection.
• Further research into optimized knitted structures can lead to advanced wearable shielding solutions.