Hybrids of glass fibers coated with carbon nanotubes and nickel for high‐performance electromagnetic wave absorption composites

Abstract

To expand the application of insulating glass fiber (GF) in the field of microwave absorption, one type of glass fibers (GF) hybrids with carbon nanotubes (CNTs) and nickel (Ni) was successfully synthesized by chemical vapor deposition (CVD) and electroless plating methods. By changing the reaction conductions, the morphology of GF hybrids including CNT's length, CNT's growth density, and Ni's thickness could be adjusted. The as-produced hybrids were used as multifunctional reinforcement to fabricate epoxy composites. The dielectric properties of composites were particularly measured from 1 to 18 GHz. It was found that the variation of GF hybrids structure significantly changed the dielectric properties of the composites in the tested frequency range. Furthermore, the analytical simulation work based on the experimental results was conducted for optimizing the structural parameters of multilayered composites. The results showed that the best reflection loss of -60dB with a -10dB range of 5.6GHz could be obtained in an absorber with a triple-layered structure composed by GF-CNTs/epoxy with different CNT contents and GF-CNTs@Ni/epoxy. Thus, the proposed hybrid method might be quite efficient for developing composites that can achieve high-performance electromagnetic absorbing.

Performances of multilayer composite materials for broadband shielding

“…MULTILAYERED COMPOSITE SHIELDS As mentioned in the introduction, the composites presented in the previous sections can be combined to provide a high shielding. Such multilayer arrangements have demonstrated a significant absorption efficiency in the X-band [12]. At low frequencies, as shown in Fig.…”

“…In [8] a flexible graphene-based paper was shown to provide a high shielding effectiveness (SE) over the frequency range 10 MHz -18 GHz. Metal coating are also sometimes proposed to increase SE [3,4,12]. In some configurations local arrangements of multilayers combining conductive materials and composite materials may provide efficient solutions [7].…”

“…The contribution of this paper is to design a shielding material for a wide band analysis (from 0 Hz to several GHz). In [11,12] the authors have shown that multilayers combinations of glass fiber-based nanocomposite materials lead to high absorption rates and high shielding effectiveness over the Xband. To obtain a high SE over an extended frequency range, the work suggests to combine magnetic layers with conductive layers and investigates the capabilities of several composite (including nanocomposite) materials.…”

Study on Properties of Glass-Fiber-Fabric-Reinforced Microwave-Absorbing Composites

“…The optimized microwave-absorbing properties of the composites with minimum RL of −45.7 dB, and full X-band effective absorption can be achieved when the total thickness of the matching layer and absorbing layer is 1.8 mm. Liu, Y. et al [32] synthesized one type of GF hybrid with carbon nanotubes (CNTs) and nickel (Ni). By changing the reaction conditions, the morphology of the GF hybrids, including CNT's length, CNT's growth density, and Ni's thickness, could be adjusted.…”

Assessment of Broadband Shielding Effectiveness of Composite Panels for Protective Enclosures

“…These composites are generally dedicated to high-frequency applications, X-band for example (8)(9)(10)(11)(12) for radar applications. Moreover, metal coatings are sometimes proposed to increase SE [12], [13]. In [14], Multiwalled carbon nanotubes-added glass fabric/epoxy composites used as shielding enclosure show a promising SE, higher than 20 dB between 300 MHz and 1 GHz.…”