Phenol formaldehyde resin derived carbon-MCMB composite foams for electromagnetic interference shielding and thermal management applications

Sharma, Anushi; Kumar, Rajeev; Patle, Veerendra Kumar; Dhawan, Ridham; Abhash, Amit; Dwivedi, Neeraj; Mondal, D.P.; Srivastava, A. K.

doi:10.1016/j.coco.2020.100433

Cited by 25 publications

(22 citation statements)

References 49 publications

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“…Polyamide A062 has equivalent weight per H active of 110. The density and viscosity of polyamide A062 at 25 °C were 0.96 g/cm 3 and 35-45 Pas, respectively. AB provided from HmbG Chemicals Malaysia was white crystalline powder used as the blowing agent and has density of 1.58 g/cm 3 .…”

Section: Methodsmentioning

confidence: 96%

“…The density and viscosity of polyamide A062 at 25 °C were 0.96 g/cm 3 and 35-45 Pas, respectively. AB provided from HmbG Chemicals Malaysia was white crystalline powder used as the blowing agent and has density of 1.58 g/cm 3 . Corn oil was purchased from Yee Lee Corporation Sdn.…”

Section: Methodsmentioning

confidence: 96%

“…Porous micro-bead is considered to be a useful invention that has gained the attention of researchers recently. Due to the presence of pores in the structure, porous micro-bead offers large surface area 1) , lightweight 2) , excellent thermal properties 3) and enhanced absorption behavior 4) . As a result, porous micro-bead has been widely used in many applications including electronics 5) , biomedical 6) , cosmetics 7) , and automotive 8) .…”

Section: Introductionmentioning

confidence: 99%

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Formation of Porous Epoxy Micro-beads from a Single Droplet of Epoxy-Polyamide-Ammonium Bicarbonate at Different Temperatures

Leemsuthep¹,

Zakaria²,

Tanrattanakul³

et al. 2021

Evergreen

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Process temperature greatly affects the decomposition behavior of a blowing agent, and changes the structure of the porous epoxy. This paper investigates the effect of processing temperature on the decomposition rate and volume of decomposing gases from ammonium bicarbonate as well as the properties of porous epoxy micro-bead through a single epoxy droplet. A single epoxy droplet (epoxy-polyamide-ammonium bicarbonate) was dropped into the corn oil heated at the temperatures of 80°C, 90°C and 100°C. This study found that by controlling the processing temperature, an epoxy foam bulk (80°C) or a number of porous epoxy micro-beads were fabricated (90°C and 100°C). Higher total volume of gas was generated which was 1142.86 cm 3 /g at 100°C, with lower viscosity of epoxy. Therefore, the initial epoxy droplet of 10:6 ratio burst into smaller micro-beads with dominant sizes in the range of 251-500 μm and porosity of 30%. From the perspective of epoxy polyamide ratios, the 10:10 ratio has porous epoxy micro-beads slightly larger than that of 10:6 ratio. This induced a decrease in porosity and an increase in specific gravity of micro-beads of 10:10 ratio.

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Section: Methodsmentioning

confidence: 96%

Section: Methodsmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Formation of Porous Epoxy Micro-beads from a Single Droplet of Epoxy-Polyamide-Ammonium Bicarbonate at Different Temperatures

Leemsuthep¹,

Zakaria²,

Tanrattanakul³

et al. 2021

Evergreen

View full text Add to dashboard Cite

show abstract

“…By constructing 3D conductive networks among the conductive fillers within the polymer matrix, polymer‐based EMI shielding composites with light weight, outstanding conductivity, excellent EMI shielding performances, and outstanding mechanical properties can be prepared with a pretty low loading of conductive fillers. The preparation methods of polymer‐based EMI shielding composites mainly include the template method, freeze‐drying method, hydrothermal method, and foaming method 23–27 …”

Section: Preparation Methods Of Polymer‐based Emi Shielding Materials With 3d Conductive Networkmentioning

confidence: 99%

“…The preparation methods of polymer-based EMI shielding compos-ites mainly include the template method, freeze-drying method, hydrothermal method, and foaming method. [23][24][25][26][27]…”

Section: Preparation Methods Of Polymer-based Emi Shielding Materials With 3d Conductive Networkmentioning

confidence: 99%

Polymer‐based EMI shielding composites with 3D conductive networks: A mini‐review

Wang

Zhang

et al. 2021

SusMat

244

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High‐frequency electromagnetic waves and electronic products can bring great convenience to people's life, but lead to a series of electromagnetic interference (EMI) problems, such as great potential dangers to the normal operation of electronic components and human safety. Therefore, the research of EMI shielding materials has attracted extensive attention by the scholars. Among them, polymer‐based EMI shielding materials with light weight, high specific strength, and stable properties have become the current mainstream. The construction of 3D conductive networks has proved to be an effective method for the preparation of polymer‐based EMI shielding materials with excellent shielding effectiveness (SE). In this paper, the shielding mechanism of polymer‐based EMI shielding materials with 3D conductive networks is briefly introduced, with emphasis on the preparation methods and latest research progress of polymer‐based EMI shielding materials with different 3D conductive networks. The key scientific and technical problems to be solved in the field of polymer‐based EMI shielding materials are also put forward. Finally, the development trend and application prospects of polymer‐based EMI shielding materials are prospected.

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Robust polyamide 66 composites with hybrid fillers for thermal management and electromagnetic shielding

Yang

Zhu

et al. 2023

Polymer Composites

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Carbon materials have been widely used in multifunctional composites with their high electrical and thermal conductivities. However, most current research focuses on nanocarbon materials such as graphene and carbon nanotubes, ignoring their high cost, inability to mass‐produce, and poor dispersion in polymers. To address these issues, we propose one‐step melt‐blending of commercial carbon materials to construct conductive pathways in polymer matrix. Thus, low‐cost and robust polymer composites can be fabricated in a green and scalable way to achieve efficient thermal management and avoid electromagnetic radiation pollution. Here, a continuous network of carbon materials with orientation‐aligned carbon fibers and well‐dispersed mesocarbon microbeads (MCMBs) induced by melt blending is shown to be an ideal structure for thermally conductive (1.77 W m−1 K−1) electromagnetic shielding (46.9 dB) composites. In addition, the excellent mechanical properties (tensile strength 162.7 MPa and flexural strength 250 MPa) and absorption property (39.4 dB) exhibited by the composites under the optimized filler ratio also really broaden the way for the preparation of high‐strength wave absorbing materials by melt blending. This work provides a general strategy for large‐scale production of thermally conductive electromagnetic shielding composites and opens up possibilities for the application of MCMBs in high‐power electronic devices.

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Phenol formaldehyde resin derived carbon-MCMB composite foams for electromagnetic interference shielding and thermal management applications

Cited by 25 publications

References 49 publications

Formation of Porous Epoxy Micro-beads from a Single Droplet of Epoxy-Polyamide-Ammonium Bicarbonate at Different Temperatures

Formation of Porous Epoxy Micro-beads from a Single Droplet of Epoxy-Polyamide-Ammonium Bicarbonate at Different Temperatures

Polymer‐based EMI shielding composites with 3D conductive networks: A mini‐review

Robust polyamide 66 composites with hybrid fillers for thermal management and electromagnetic shielding

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