High-efficiency electromagnetic wave absorption of epoxy composites filled with ultralow content of reduced graphene/carbon nanotube oxides

Zhang, Xu; Wang, Xiaoqun; Sha, Peng; Wang, Bendong; Ding, Yi; Du, Shiyu

doi:10.1016/j.compscitech.2020.108020

Cited by 49 publications

(13 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Since CNT has excellent mechanical properties, it is attracting attention as a filler for reinforcing polymer materials, and is also highly expected to be used as a conductivity‐imparting material. Cao et al report in detail on the conductive mechanism of CNTs, 42 and many other researchers have contributed detailed reports on this topic 43–52 . The most common application to be developed is the use of CNTs for electromagnetic wave shielding; polymer matrix composite materials 43–48 are also attracting attention for their effects on electromagnetic wave shielding.…”

Section: Resultsmentioning

confidence: 99%

“…Cao et al report in detail on the conductive mechanism of CNTs, 42 and many other researchers have contributed detailed reports on this topic 43–52 . The most common application to be developed is the use of CNTs for electromagnetic wave shielding; polymer matrix composite materials 43–48 are also attracting attention for their effects on electromagnetic wave shielding. As seen in the development of flexible materials, 43 flexible materials have a very wide range of uses, including application to various sensors, flexible electrodes, flexible devices, and wearable systems 52 .…”

Section: Resultsmentioning

confidence: 99%

“…Cao et al report in detail on the conductive mechanism of CNTs, 42 and many other researchers have contributed detailed reports on this topic. [43][44][45][46][47][48][49][50][51][52] The most common application to be developed is the use of CNTs for electromagnetic wave shielding; polymer matrix composite materials [43][44][45][46][47][48] are also attracting attention for their effects on electromagnetic wave shielding. As seen in the development of flexible…”

Section: Characteristic Improvement By Microwave Heat Treatmentmentioning

confidence: 99%

See 2 more Smart Citations

Preparation of high‐performance carbon nanotube/polyamide composite materials by elastic high‐shear kneading and improvement of properties by induction heating treatment

Noguchi

Niihara

Kawamoto

et al. 2021

J of Applied Polymer Sci

View full text Add to dashboard Cite

Polyamide 66 (PA66) nanocomposites were prepared by compounding carbon nanotubes (CNTs) using an elastic high‐shear kneading method, and the mechanism to understand their excellent properties was verified. In addition, we developed a microwave heat treatment that increases toughness quickly and at low cost. By combining 6.6 vol% or more of CNTs, PA66 with improved mechanical properties, such as higher elastic modulus and yield strength, was achieved, making it possible to obtain a composite having excellent high‐temperature characteristics that does not melt even at a temperature above the melting point. These effects appeared to be due to defibration of CNT aggregates and isolation and dispersion in PA66. A lamellar crystal of PA66 grows around the CNT, forming an interphase. The higher performance appeared to be attributable to a continuous three‐dimensional structure in which CNTs are bound via the interphase, and the improvement of the elastic modulus of the composite material was tentatively ascribed to a Halpin‐Tsai model in which the size of the unit cell of the three‐dimensional structure is introduced. The resulting CNT/PA66 composite materials are superior not only in performance but also in price.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Characteristic Improvement By Microwave Heat Treatmentmentioning

confidence: 99%

See 1 more Smart Citation

Preparation of high‐performance carbon nanotube/polyamide composite materials by elastic high‐shear kneading and improvement of properties by induction heating treatment

Noguchi

Niihara

Kawamoto

et al. 2021

J of Applied Polymer Sci

View full text Add to dashboard Cite

show abstract

“…Unfortunately, the excessively high electrical conductivity of graphene always leads to a high reflection toward the incident microwave, which further results in the poor impedance matching [14,27,28]. On the other hand, the limited loss mechanism also leads to the weak microwave absorption of graphene [29,30]. To solve these drawbacks, many studies have combined graphene with other nanomaterials such as metals/alloys [31,32], ferrites [6,33,34], metal oxides/sulfide [35][36][37] and so on, which could achieve high magnetic or dielectric losses and thus add more loss mechanisms to improve their microwave absorption performance.…”

Section: Introductionmentioning

confidence: 99%

A Facile Synthesis of Novel Amorphous TiO2 Nanorods Decorated rGO Hybrid Composites with Wide Band Microwave Absorption

et al. 2020

View full text Add to dashboard Cite

Amorphous structures may play important roles in achieving highly efficient microwave absorption performance due to the polarization losses induced by the disorders, vacancies and other functional groups existed in them. Herein, a kind of amorphous TiO2/rGO composite (a-TiO2/rGO) was successfully fabricated via a facile one-step solvothermal method. The complex permittivity of the composites can be regulated by adjusting the addition of precursor solution. The minimum reflection loss of a-TiO2/rGO composites reached −42.8 dB at 8.72 GHz with a thickness of 3.25 mm, and the widest efficient absorption bandwidth (EAB) was up to 6.2 GHz (11.8 to 18 GHz) with a thickness of only 2.15 mm, which achieved the full absorption in Ku band (12 to 18 GHz). Furthermore, the EAB was achieved ranging from 3.97 to 18 GHz by adjusting the thickness of the absorber, covering 87.7% of the whole radar frequency band. It is considered that the well-matched impedance, various polarization processes, capacitor-like structure and conductive networks all contributed to the excellent microwave absorption of a-TiO2/rGO. This study provides reference on constructing amorphous structures for future microwave absorber researches and the as-prepared a-TiO2/rGO composites also have great potential owing to its facile synthesis and highly efficient microwave absorption.

show abstract

“…Compared with metallic metamaterials, carbon materials also have excellent EM wave absorbing performances, such as carbon nanotubes [14], graphene [15], carbon black [16] and helical carbon fibers [17], which are usually added into concrete or resin matrix as a common design method of MMA. But the ability of EM regulation depends on carbon materials themselves, so they are not flexible in the design of EM absorber.…”

Section: Introductionmentioning

confidence: 99%

Design of the Broadband Metamaterial Absorber Based on Dispersed Carbon Fibers in Oblique Incidence

Yan

Jiang

et al. 2020

IEEE Access

View full text Add to dashboard Cite

In this paper, a broadband double-layer metamaterial absorber (MMA) based on carbon fibers (CFs) is proposed, which consists of three basic elements. Firstly, the reflectivity of CFs double-layer MMA in normal incidence is analyzed, and compared to the copper double-layer MMA with same size, the simulated results show that it obtains better absorbing effect. With the increase of incident angle, the multifrequency resonance is activated, leading to larger effective bandwidth. Moreover, when incident angle is between 55 and 70 degrees, the continuous absorption band above 85% can totally cover X and Ku microwave band. Meanwhile, when the EM frequency is at 6-7.5GHz, the change of incident angle hardly affects the absorbing performances of CFs double-layer MMA. A specimen of the CFs double-layer MMA was fabricated by the vacuum bag molding process to verify its effectiveness and the measured results fitted well with the simulated results. In order to discuss the mechanism of EM absorption, the distribution of E-fields and power loss density were monitored. The results indicate that incident angle effects the distribution of Efields and the way of absorption to change the absorbing performances. The proposed MMA has potential application prospects in the structural and functional integration design of CFs.

show abstract

High-efficiency electromagnetic wave absorption of epoxy composites filled with ultralow content of reduced graphene/carbon nanotube oxides

Cited by 49 publications

References 38 publications

Preparation of high‐performance carbon nanotube/polyamide composite materials by elastic high‐shear kneading and improvement of properties by induction heating treatment

Preparation of high‐performance carbon nanotube/polyamide composite materials by elastic high‐shear kneading and improvement of properties by induction heating treatment

A Facile Synthesis of Novel Amorphous TiO2 Nanorods Decorated rGO Hybrid Composites with Wide Band Microwave Absorption

Design of the Broadband Metamaterial Absorber Based on Dispersed Carbon Fibers in Oblique Incidence

Contact Info

Product

Resources

About