3D‐printing carbon nanotubes/Ti3C2Tx/chitosan composites with different arrangement structures based on ball milling for EMI shielding

Pei, Xiaoyuan; Liu, Guangde; Shao, Ruiqi; Yu, Rongrong; Chen, Runxiao; Liu, Dong; Wang, Wei; Min, Chunying; Liu, Shengkai; Xu, Zhiwei

doi:10.1002/app.53125

Cited by 14 publications

(8 citation statements)

References 47 publications

(78 reference statements)

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“…matching layer also increases from 1 to 3 mm, resulting in poor impedance matching and low EMI SE. We summarized the research progress of various EMI shielding materials in the literature, including MXene, CNT, polymer composite membranes/aerogels/frames [16,[51][52][53][54][55][56][57][58][59][60][61][62], and the results are shown in Fig. 5c and Table S3.…”

Section: Tunable Emi Se Performance Of Gcmcp Aerogel Frames With Diff...mentioning

confidence: 99%

3D Printed Integrated Gradient-Conductive MXene/CNT/Polyimide Aerogel Frames for Electromagnetic Interference Shielding with Ultra-Low Reflection

et al. 2023

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Construction of advanced electromagnetic interference (EMI) shielding materials with miniaturized, programmable structure and low reflection are promising but challenging. Herein, an integrated transition-metal carbides/carbon nanotube/polyimide (gradient-conductive MXene/CNT/PI, GCMCP) aerogel frame with hierarchical porous structure and gradient-conductivity has been constructed to achieve EMI shielding with ultra-low reflection. The gradient-conductive structures are obtained by continuous 3D printing of MXene/CNT/poly (amic acid) inks with different CNT contents, where the slightly conductive top layer serves as EM absorption layer and the highly conductive bottom layer as reflection layer. In addition, the hierarchical porous structure could extend the EM dissipation path and dissipate EM by multiple reflections. Consequently, the GCMCP aerogel frames exhibit an excellent average EMI shielding efficiency (68.2 dB) and low reflection (R = 0.23). Furthermore, the GCMCP aerogel frames with miniaturized and programmable structures can be used as EMI shielding gaskets and effectively block wireless power transmission, which shows a prosperous application prospect in defense industry and aerospace.

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Section: Tunable Emi Se Performance Of Gcmcp Aerogel Frames With Diff...mentioning

confidence: 99%

3D Printed Integrated Gradient-Conductive MXene/CNT/Polyimide Aerogel Frames for Electromagnetic Interference Shielding with Ultra-Low Reflection

et al. 2023

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“…(e) Values of EMI SE for the C3P1 composites with a different grid over the X-band frequency range (8.2–12.4 GHz), (f) R and A coefficients of the C3P1 composites with different grids. (g) EMI shielding mechanism (g1: reflection mechanism by electron migration and hopping and multiple internal reflection inside the micropores of the shields; g2: the effect of different grid sizes on the EMI shielding mechanism) and (h) specific EMI shielding effectiveness versus A coefficient for different composites; CNF: cellulose nanofiber, AgNW: silver nanowires, CNT: carbon nanotube, CNC: cellulose nanocrystal, − MXene/rGO, Ti 3 C 2 T x -PEDOT:PSS, CNT/Chitosan, TiO 2 –Ti 3 C 2 T x /rGO/PDMS, MXene/CNT/polyimide, − PVDF/PEDOT, and ABS/CNT (grid G1:1 mm distance between grids, grid G2:2 mm distance between grids, and grid G3:3 mm distance between grids).…”

Section: Resultsmentioning

confidence: 99%

Surfactant-Mediated Highly Conductive Cellulosic Inks for High-Resolution 3D Printing of Robust and Structured Electromagnetic Interference Shielding Aerogels

Amini,

Hosseini,

Dutta

et al. 2023

ACS Appl. Mater. Interfaces

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Technological fusion of emerging three-dimensional (3D) printing of aerogels with gel processing enables the fabrication of lightweight and functional materials for diverse applications. However, 3D-printed constructs via direct ink writing for fabricating electrically conductive structured biobased aerogels suffer several limitations, including poor electrical conductivity, inferior mechanical strength, and low printing resolution. This work addresses these limitations via molecular engineering of conductive hydrogels. The hydrogel inks, namely, CNC/PEDOT-DBSA, featured a unique formulation containing well-dispersed cellulose nanocrystal decorated by a poly(3,4-ethylene dioxythiophene) (PEDOT) domain combined with dodecylbenzene sulfonic acid (DBSA). The rheological properties were precisely engineered by manipulating the solid content and the intermolecular interactions among the constituents, resulting in 3D-printed structures with excellent resolution. More importantly, the resultant aerogels following freeze-drying exhibited a high electrical conductivity (110 ± 12 S m–1), outstanding mechanical properties (Young’s modulus of 6.98 MPa), and fire-resistance properties. These robust aerogels were employed to address pressing global concerns about electromagnetic pollution with a specific shielding effectiveness of 4983.4 dB cm2 g–1. Importantly, it was shown that the shielding mechanism of the 3D printed aerogels could be manipulated by their geometrical features, unraveling the undeniable role of additive manufacturing in materials design.

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“…It was known that boron could absorb neutrons [ 122 , 123 , 124 , 125 , 126 , 127 , 128 , 129 , 130 , 131 , 132 , 133 , 134 , 135 , 136 , 137 , 138 , 139 , 140 , 141 , 142 , 143 , 144 , 145 , 146 , 147 , 148 , 149 , 150 , 151 , 152 , 153 , 154 , 155 ]. If a boron-containing coating material has sufficient thickness, most charged neutron particles will be absorbed, and boron-containing materials can prevent neutron migration.…”

Section: Comprehensive Strategies and Solutions To Mitigate And Contr...mentioning

confidence: 99%

“…Generally, membrane shielding materials with porous structures can promote the internal reflection and scattering of electromagnetic waves, and often have better shielding effectiveness than non-porous materials. Pei et al [ 129 ] prepared porous CNT/Ti 3 C 2 T x /CS composites by a combination of ball milling technology and 3D printing technology ( Figure 14 b,c). It was found that CNTs and Ti 3 C 2 T x were uniformly dispersed in the polymer matrix, which is conducive to the construction of a conductive network thus improves the electromagnetic shielding performance of 3D printing devices, which can reach 23.5 dB.…”

Section: Novel Electromagnetic/radiation Shielding Membrane Materials...mentioning

confidence: 99%

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Research Progress with Membrane Shielding Materials for Electromagnetic/Radiation Contamination

Zhang

2023

Membranes

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As technology develops at a rapid pace, electromagnetic and radiation pollution have become significant issues. These forms of pollution can cause many important environmental issues. If they are not properly managed and addressed, they will be everywhere in the global biosphere, and they will have devastating impacts on human health. In addition to minimizing sources of electromagnetic radiation, the development of lightweight composite shielding materials to address interference from radiation has become an important area of research. A suitable shielding material can effectively reduce the harm caused by electromagnetic interference/radiation. However, membrane shielding materials with general functions cannot effectively exert their shielding performance in all fields, and membrane shielding materials used in different fields must have specific functions under their use conditions. The aim of this review was to provide a comprehensive review of these issues. Firstly, the causes of electromagnetic/radiation pollution were briefly introduced and comprehensively identified and analyzed. Secondly, the strategic solutions offered by membrane shielding materials to address electromagnetic/radiation problems were discussed. Then, the design concept, technical innovation, and related mechanisms of the existing membrane shielding materials were expounded, the treatment methods adopted by scholars to study the environment and performance change laws were introduced, and the main difficulties encountered in this area of research were summarized. Finally, on the basis of a comprehensive analysis of the protection provided by membrane shielding materials against electromagnetic/radiation pollution, the action mechanism of membrane shielding materials was expounded in detail, and the research progress, structural design and performance characterization techniques for these materials were summarized. In addition, the future challenges were prospected. This review will help universities, research institutes, as well as scientific and technological enterprises engaged in related fields to fully understand the design concept and research progress of electromagnetic/radiation-contaminated membrane shielding materials. In addition, it is hoped that this review will facilitate efforts to accelerate the research and development of membrane shielding materials and offer potential applications in areas such as electronics, nuclear medicine, agriculture, and other areas of industry.

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3D‐printing carbon nanotubes/Ti₃C₂T_x/chitosan composites with different arrangement structures based on ball milling for EMI shielding

Cited by 14 publications

References 47 publications

3D Printed Integrated Gradient-Conductive MXene/CNT/Polyimide Aerogel Frames for Electromagnetic Interference Shielding with Ultra-Low Reflection

3D Printed Integrated Gradient-Conductive MXene/CNT/Polyimide Aerogel Frames for Electromagnetic Interference Shielding with Ultra-Low Reflection

Surfactant-Mediated Highly Conductive Cellulosic Inks for High-Resolution 3D Printing of Robust and Structured Electromagnetic Interference Shielding Aerogels

Research Progress with Membrane Shielding Materials for Electromagnetic/Radiation Contamination

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