Polyimide nanocomposites with boron nitride-coated multi-walled carbon nanotubes for enhanced thermal conductivity and electrical insulation

Yan, Wei; Zhang, Yi; Sun, Huawei; Liu, Siwei; Chi, Zhenguo; Chen, Xudong; Xu, Jiarui

doi:10.1039/c4ta04663c

Cited by 138 publications

(70 citation statements)

References 56 publications

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“…Although chemical functionalization of the CNTs improves the dispersion of CNTs, the covalent functionalization can also distort the structure of CNTs and thus sometimes even reducing the thermal conductivity [217]. Coating CNTs with inorganic materials such as BN or alumina has also been reported to significantly improve the dispersibility of CNTs [218][219][220]. The thermal conductivities of polyimide (PI) based nanocomposites incorporated with MWCNTs or BN-coated MWCNT (BN-c-MWCNTs) are compared, as shown in Fig.…”

Section: Improvement Of Filler Distributionmentioning

confidence: 99%

“…The thermal conductivities of polyimide (PI) based nanocomposites incorporated with MWCNTs or BN-coated MWCNT (BN-c-MWCNTs) are compared, as shown in Fig. 21 [218]. The thermal conductivity of MWCNT@PI decreases with the increasing concentration of MWCNTs when its concentration is larger than 1 wt%, while the thermal conductivity of BN-c-MWCNT@PI keeps increasing with the increase of BN-c-MWCNT concentrations.…”

Section: Improvement Of Filler Distributionmentioning

confidence: 99%

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Thermal conductivity of polymers and polymer nanocomposites

Huang

Qian

Yang

2018

Materials Science and Engineering: R: Reports

640

391

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Polymers are widely used in industry and in our daily life because of their diverse functionality, light weight, low cost and excellent chemical stability. However, on some applications such as heat exchangers and electronic packaging, the low thermal conductivity of polymers is one of the major technological barriers. Enhancing the thermal conductivity of polymers is important for these applications and has become a very active research topic over the past two decades. In this review article, we aim to: 1). systematically summarize the molecular level understanding on the thermal transport mechanisms in polymers in terms of polymer morphology, chain structure and inter-chain coupling; 2). highlight the rationales in the recent efforts in enhancing the thermal conductivity of nanostructured polymers and polymer nanocomposites. Finally, we outline the main advances, challenges and outlooks for highly thermal-conductive polymer and polymer nanocomposites. the inter-chain coupling. Fig. 1 Schematic diagrams of a polymer: (a) the morphology of a polymer consisting of crystalline and amorphous domains; (b) structure of a polymer chain.In addition to engineering the morphology of polymer chains, another common method to enhance the thermal conductivity of polymers is to blend polymers with highly thermal conductive fillers. The progress of nanotechnology over the last two decades not only provides more diverse high thermal conductivity fillers of different material types and topological shapes but also advances the understanding at the nanoscale. Fig. 2 shows a sketch of a polymer nanocomposite to illustrate the thermal transport mechanisms. In general, there are two types of polymer nanocomposites depending on whether nano-fillers form a network or not. When the filler concentration is low, no inter-filler networks could be formed, as shown in Fig. 2(a). The thermal conductivity is essentially determined by the filler-matrix coupling, i.e, interfacial thermal resistance, and the concentration and the geometric shapes of fillers. When the filler concentration is large enough, high conductivity fillers might form thermally conductive networks, as shown in Fig. 2(b). Although nanocomposites with filler network could possess a higher thermal conductivity than that without a network, their thermal conductivity could still be low due to the large inter-filler thermal contact resistance. Recently, three-dimensional fillers, such as carbon and graphene foams, have drawn a lot of attention. The fundamental thermal transport mechanisms and recent synthesis efforts in both types of nanocomposites are reviewed.This review article is organized as follows. In Section 2, we introduce the experimental progress on the enhancement of thermal conductivity by aligning polymer chains, and then review the methods to further tune the thermal conductivity by engineering chain structure and inter-chain coupling, as illustrated in Fig. 3(a). In Section 3, we discuss the thermal conductivity of polymer nanocomposites both with and without inter...

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Section: Improvement Of Filler Distributionmentioning

confidence: 99%

Section: Improvement Of Filler Distributionmentioning

confidence: 99%

Thermal conductivity of polymers and polymer nanocomposites

Huang

Qian

Yang

2018

Materials Science and Engineering: R: Reports

640

391

View full text Add to dashboard Cite

show abstract

“…Therefore, they are widely used in the electronics and aerospace industry as an insulating film due to their excellent thermal stability, mechanical properties, and low dielectric constants [1][2][3][4][5][6]. However, the PI has a thermal conductivity of the order of 0.1 W/(mK), which cannot meet the heat-dissipating requirements of microelectronic product.…”

Section: Introductionmentioning

confidence: 99%

Enhanced thermal conductivity and retained electrical insulation for polyimide composites with SiC nanowires grown on graphene hybrid fillers

Dai

Liu

et al. 2015

Composites Part A: Applied Science and Manufacturing

138

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“…Nowadays, with the development of science and technology, there are the increasing requirements for the thermal conductive polymer materials and parts in many fields such as electric and electronic field, semiconductor industry, and aerospace . As a result, more and more attention has been focused on the investigation of thermal conductive polymer composites such as polypropylene/aluminum nitride, polyimide/boron nitride (BN), poly(vinyl alcohol) (PVA)/graphite, and ABS/copper system because of their outstanding properties such as light weight and good formability. However, there are still some challenges in preparation of the current thermal conductive polymer composites and parts.…”

Section: Introductionmentioning

confidence: 99%

Solid‐state shear milling method to prepare PA12/boron nitride thermal conductive composite powders and their selective laser sintering 3D‐printing

Yang

Wang

Chen

2019

J of Applied Polymer Sci

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The selective laser sintering (SLS) is one of the most important 3D‐printing technologies. However, the challenges in SLS could be in the limited high material cost and single material performance. Development of high‐performance and multifunctional copowders suitable for SLS is of great importance. Here, polyamide 12 (PA12)/boron nitride (BN) thermal conductive copowders suitable for SLS were successfully prepared through solid state shear milling (S3M) technology in combination with cryogenic pulverization technology. The particle size, morphology, grafting reaction between PA12 and BN, rheology behavior, and coalescence behavior of the obtained PA12/BN copowders were carefully investigated. The optimal amount of silica flow additive (0.5 wt %) was determined to achieve the good powder flowability. Under the optimum 3D‐printing conditions, the fabrication of parts with high BN loading could be achieved. When BN content was at 40 wt %, the flexural strength could reach 10.6 MPa and the thermal conductivity could reach 0.55 W/m·k, 77% higher than that of pure PA12. After treated with phenolic epoxy resin, the tensile strength and flexural strength of the printed parts with 40 wt % BN loading could reach 14.2 and 25.6 MPa, which were 130 and 115% higher than those of the untreated 3D‐printed parts, respectively. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020, 137, 48766.

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Polyimide nanocomposites with boron nitride-coated multi-walled carbon nanotubes for enhanced thermal conductivity and electrical insulation

Abstract: Polyimide nanocomposites with boron nitride-coated multi-walled carbon nanotubes (BN-c-MWCNTs) were successfully prepared with enhanced thermal conductivity and electrical insulation.

Cited by 138 publications

References 56 publications

Thermal conductivity of polymers and polymer nanocomposites

Thermal conductivity of polymers and polymer nanocomposites

Enhanced thermal conductivity and retained electrical insulation for polyimide composites with SiC nanowires grown on graphene hybrid fillers

Solid‐state shear milling method to prepare PA12/boron nitride thermal conductive composite powders and their selective laser sintering 3D‐printing

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