Multi-layered textile structure for thermal signature suppression of ground based targets

Dev, Om; Dayal, Shanker; Dubey, Ashish; Abbas, S. M.

doi:10.1016/j.infrared.2019.103175

Cited by 11 publications

(6 citation statements)

References 4 publications

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“…Textiles for uniforms are typically made of single layer, and their effective optical thickness is a result of a compromise of several needs, rather than just the desired spectral reflectance properties. In comparison, multi-layered camouflage fabrics provide several favorable properties such as suppression of thermal contrast outliers, 14 improved thermal comfort, 15 electromagnetic signature control, 16 increased shadowing effects, and preventing revealing effects such as unnaturally flat surfaces in natural cluttered backgrounds.…”

Section: Introductionmentioning

confidence: 99%

Spectral characteristics of moist birch leaves and synthetic materials: experimental studies and evaluation of models

Mikkelsen

Selj

2021

Opt. Eng.

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Section: Introductionmentioning

confidence: 99%

Spectral characteristics of moist birch leaves and synthetic materials: experimental studies and evaluation of models

Mikkelsen

Selj

2021

Opt. Eng.

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“…IR camouflage aims at concealing the human body or wearable devices for avoiding IR reconnaissance, which needs the surface with an ultralow emissivity at the operating wavelengths of thermal imagers and heat‐seeking missiles, i.e., the mid‐wavelength infrared (MWIR) and the long‐wavelength infrared (LWIR), corresponding to 3–5 μm and 8–14 μm, respectively. [ 13 ] Ergoktas et al. manufactured graphene self‐adapting IR textiles with an emissivity of 35% at a voltage of 6 V. [ 14 ] Sun et al.…”

Section: Introductionmentioning

confidence: 99%

“…IR camouflage aims at concealing the human body or wearable devices for avoiding IR reconnaissance, which needs the surface with an ultralow emissivity at the operating wavelengths of thermal imagers and heat-seeking missiles, i.e., the mid-wavelength infrared (MWIR) and the longwavelength infrared (LWIR), corresponding to 3-5 μm and 8-14 μm, respectively. [13] Ergoktas et al manufactured graphene self-adapting IR textiles with an emissivity of 35% at a voltage of 6 V. [14] Sun et al prepared mid-infrared (MIR) modulator using the multi-walled carbon nanotube film, which had an emissivity as low as 15%. [15] Jia et al deposited Cu on aramid textiles by magnetron sputtering with an emissivity close to 10%.…”

mentioning

confidence: 99%

Multifunctional Textiles Enabled by Simultaneous Interaction with Infrared and Microwave Electromagnetic Waves

Wang

Huang

et al. 2022

Adv Materials Inter

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Conventional textiles keep the body warm and provide an aesthetic appearance for human beings, while they are insufficient for military and civil applications in harsh environments. Multifunctional textiles that are capable of creating infrared (IR) camouflage, electromagnetic interference (EMI) shielding, and personal warming by interacting with both IR and microwave electromagnetic waves (EMWs) are developed. The inorganic–organic polytetrafluoroethylene (PTFE)/Ag/PTFE (IO‐PAP) building blocks are deposited on the polyurethane (PU)‐coated textiles using an eco‐friendly magnetron sputtering technique, where a smooth and durable Ag layer is grown, circumventing the large roughness and less connection between fibers in conventional textiles. Using the IO‐PAP building blocks, the ultralow IR emissivity and the ultrahigh microwave reflectance are achieved for effective IR camouflage and EMI shielding, respectively, together with satisfactory mechanical robustness. The EMI shielding effectiveness is further improved to 73 dB through employing a Fabry–Pérot‐based double‐sided PAP (D‐PAP) architecture. The D‐PAP‐coated textiles also exhibit personal warming, increasing the skin temperature by 2.7 °C compared with conventional cotton through reflecting thermal radiation of human bodies and mitigating radiative heat loss from textiles. This work will inspire the ultra‐band EMW engineering of textiles for realizing advanced functionalities in a way of eco‐friendly and scalable manufacture.

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“…The combination of heat migration from an object to the environment can create a thermal signature, measured by thermal imaging techniques [ 2 ]. Thermal signature is affected by the temperature of the object and background, and an effective way to reduce it is by reducing the emissivity [ 3 , 4 ]. The temperature difference (ΔT) between the object and background affects the thermal region in thermal imaging [ 5 , 6 ].…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Recycled Polycarbonate Fibre for Thermal Signature Reduction in Camouflage Textiles

et al. 2022

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Thermal signature reduction in camouflage textiles is a vital requirement to protect soldiers from detection by thermal imaging equipment in low-light conditions. Thermal signature reduction can be achieved by decreasing the surface temperature of the subject by using a low thermally conductive material, such as polycarbonate, which contains bisphenol A. Polycarbonate is a hard type of plastic that generally ends up in dumps and landfills. Accordingly, there is a large amount of polycarbonate waste that needs to be managed to reduce its drawbacks to the environment. Polycarbonate waste has great potential to be used as a material for recycled fibre by the melt spinning method. In this research, polycarbonate roofing-sheet waste was extruded using a 2 mm diameter of spinnerette and a 14 mm barrel diameter in a 265 °C temperature process by using a lab-scale melt spinning machine at various plunger and take-up speeds. The fibres were then inserted into 1 × 1 rib-stitch knitted fabric made by Nm 15 polyacrylic commercial yarns, which were manufactured by a flat knitting machine. The results showed that applying recycled polycarbonate fibre as a fibre insertion in polyacrylate knitted fabric reduced the emitted infrared and thermal signature of the fabric.

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Multi-layered textile structure for thermal signature suppression of ground based targets

Cited by 11 publications

References 4 publications

Spectral characteristics of moist birch leaves and synthetic materials: experimental studies and evaluation of models

Spectral characteristics of moist birch leaves and synthetic materials: experimental studies and evaluation of models

Multifunctional Textiles Enabled by Simultaneous Interaction with Infrared and Microwave Electromagnetic Waves

Fabrication of Recycled Polycarbonate Fibre for Thermal Signature Reduction in Camouflage Textiles

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