Glass fiber/carbon nanotubes/epoxy three-component composites as radar absorbing materials

Abstract

The use of micro or nano‐fillers to optimize the properties of epoxy resins has become a common practice. The Carbon nanotubes (CNT) are considered excellent fillers because of their strength, stiffness, thermal conductivity, electrical capacity, and thermal stability, along with large electromagnetic wave absorption capability in the microwave range. In this work, electromagnetic absorption properties and dynamic‐mechanical response obtained with the incorporation of CNT into glass fiber/epoxy composites have been studied. A novel procedure to disperse and deposit CNT onto glass fiber fabrics has been developed to reach high overall content of CNT in the composite (4.15 wt%). Storage modulus increased with the incorporation of CNT, especially when they had also been incorporated into the epoxy, and for higher frequency (3 Hz). The response of the composites to electromagnetic radiation has shown an increasing trend for higher CNT content (up to 2 wt%), reaching an excellent attenuation value of up to −18.3 dB (98.5% of absorption). POLYM. COMPOS., 37:2277–2284, 2016. © 2015 Society of Plastics Engineers

A self-setting particle-stabilized porous ceramic panel prepared from commercial cement and loaded with carbon for potential radar-absorbing applications

“…The measured reflection loss of the PPCP composited with 0.2 wt.% of carbon approaches −11.16 dB at 12.4 GHz for a 7.0 mm thickness, which corresponds to ≤ −10 dB reflection loss (i.e., more than 90% absorption of the incoming radar wave). These data are comparable with those of the carbonbased radar-absorbing materials reported in the literature, such as carbon nanotube-based composites (98.54% absorption at 11.1 GHz with a thickness of 2.0 mm [12], 98.4% absorption at 8 GHz with a thickness of 4.0 mm [11]), and carbon-based composites (99.5% absorption at 11.5 GHz with a thickness of 4.0 mm [13]). Compared to the above mentioned literature data, the reflection loss of the PPCP composited with 0.2 wt.% of carbon was acceptable, because a selfsetting particle-stabilized porous ceramic panel is lowcost (the inexpensive raw materials), lightweight (the particle-stabilized pore structure), and easy to prepare (the self-setting fabrication method).…”

“…In particular, carbon-based conductive particles have been widely used because of their good absorption performance in the high frequency bands [10]. These include carbon nanotube-based composites [11,12] and carbon-based composites [13,14]. Because porous ceramics are both inherently lightweight and inexpensive, it is worthwhile to study them as low-cost lightweight radar absorbing materials.…”

Synthesis, thermal, dielectric, and microwave reflection loss properties of nickel oxide filler with natural fiber‐reinforced polymer composite

“…The use of polymeric composites as multifunctional and structural material in the several applications areas industrial and scientific research has been largely studied by the researchers. This is mainly because of characteristics which usually include low density, good mechanical properties, high‐dimensional, and thermal stability, and also special less common features like EM absorption . Polycaprolactone (PCL) is one of these polymers, used for its properties such as a high flexibility, good mechanical properties, good dielectric properties, and easy fabrication and blending …”

Epoxy-Based Hybrid Structural Composites with Nanofillers: A Review

“…Nanoparticles also affect the electrical properties of fiber-reinforced composites and hence used for getting better outcomes in many applications such as structural health monitoring, electromagnetic interference shielding, ,− etc. For example, da Silva et al, in 2016, fabricated a CNT deposited glass fiber/epoxy composite and obtained an excellent microwave attenuation value up to 218.3 dB (98.5% absorption) for CNT content of about 2 wt %. In 2017, Fogel et al dispersed 0.75 wt % CNT in epoxy through three roll milling and sprayed the resultant onto dry carbon fabrics.…”