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

Zbigniew Mikołajczyk1, Iwona Nowak1, Łukasz Januszkiewicz2

  • 1Textile Institute, Faculty of Material Technologies and Textile Design, Lodz University of Technology, 90-924 Łódź, Poland.

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Summary
This summary is machine-generated.

Knitted textile barriers using conductive yarns show potential for shielding the human body from electromagnetic fields. Fabric structure and material significantly influence shielding effectiveness against high-frequency fields.

Keywords:
knitted electromagnetic wave shieldsknitted fabricshielding effectivenessshielding measurements

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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.