Advanced Activated Carbon Adsorbent Filter Material for Chemical Protective Clothing

会议论文
发表日期：

2024年

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Himanshi Dhyani,
Ravindra V. Adivarekar,
Vikas B. Thakare,
Suraj Bharati,
Pushpendra K. Sharma,
Kaveri Agrawal,
Atul K. Sonkar,
Prabhat Garg

摘要

This study focuses on the development of an advanced chemical protective filter material to be used in Nuclear, Biological and Chemical (NBC) protective gears. The NBC protective clothing mainly consists of three layers- outer, middle, and inner layers. Specific features like flame retardancy, oil repellency, water repellency, and antistaticity are imparted in the outer layer, while the innermost layer, which remains close to the body consists of features providing comfort and safety. The middle layer is a filter layer made of adsorbent material. Activated Carbon Fabric (ACF) is a versatile textile material owing to its high surface area, meso and microporosity, flexibility, and ease of lamination onto various substrates. However, due to its fragility, lamination of ACF onto a substrate is recommended to provide strength to it. In the present work, a coating of poly (diallyl dimethyl ammonium chloride) (PDDA) was developed onto the ACF surface using the dip coating method to improve the tensile strength of the fabric without sacrificing its comfort and chemical properties. Polymer-coated ACF (PDDA@ACF) samples were characterized by scanning electron microscope (SEM), Fourier transform infrared (FTIR) spectroscopy, Thermogravimetric analysis (TGA) and Brunauer–Emmett–Teller (BET) surface area analyser. Samples were tested for tensile strength and air permeability. The performance evaluation of the developed coated fabric was determined as per IS 17377 against Sulphur Mustard (HD), a chemical warfare agent. The analysis confirmed the successful introduction of PDDA onto the surface of ACF. Tensile and air-permeability test results revealed improvements in mechanical and comfort properties, respectively. A marginal reduction in BET surface area was observed which may be attributed to the presence of polymer over the structure of ACF. The chemical protection performance was found as per the requirement of NBC protective clothing (BTT > 24h).