Largely Enhanced Thermal Conductivity and High Dielectric Constant of Poly(vinylidene fluoride)/Boron Nitride Composites Achieved by Adding a Few Carbon Nanotubes

Xiao, Yan-jun; Wang, Wenyan; Lin, Ting; Chen, Xi-jia; Zhang, Yu-tong; Yang, Jing‐hui; Wang, Yong; Zhou, Zuowan

doi:10.1021/acs.jpcc.5b12651

Cited by 207 publications

(64 citation statements)

References 63 publications

(117 reference statements)

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“…The concentration ratio of hybrid fillers also exerts a large effect on the thermal conductivity, when 3:1 is the optimal concentration ratio of da-GNPs and f-MWCNTs for maximizing the thermal conductivity. The thermal conductivity of composites filled with hybrid fillers of BN and MWCNTs is widely studied, and a synergistic improvement in the thermal conductivity was also observed [269][270][271][272]. Xiao et al [270] reported that with a small concentration of CNTs incorporated in BN@PVDF composites via melt blending method, the thermal conductivity of the composite is much higher than that of BN@PVDF composites at the same BN concentration.…”

Section: (C) With 1d+2d Hybrid Fillersmentioning

confidence: 99%

Thermal conductivity of polymers and polymer nanocomposites

Huang

Qian

Yang

2018

Materials Science and Engineering: R: Reports

591

371

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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: (C) With 1d+2d Hybrid Fillersmentioning

confidence: 99%

Thermal conductivity of polymers and polymer nanocomposites

Huang

Qian

Yang

2018

Materials Science and Engineering: R: Reports

591

371

View full text Add to dashboard Cite

show abstract

“…Xiao et al [59] described that compared with the PVDF/BN composites at the same BN content, the ternary PVDF/BN/CNT composites presented largely enhanced thermal conductivity. Taha-Tijerina et al [60] described high thermal conductivity of suspension of BN nanoparticles in a mineral oil, normally used in transformers.…”

Section: Introductionmentioning

confidence: 99%

Huge thermal conductivity enhancement in boron nitride – ethylene glycol nanofluids

Żyła

Fal

Traciak

et al. 2016

Materials Chemistry and Physics

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“…5,10,17 However, those studies reported that addition of BNNTs into polymers does not guarantee a large enhancement in thermal conductivity, because the thermal conductivity of a polymer composite depends upon various factors, such as the characteristics of ller (i.e., structural defects, the amount of loading and the orientation), the crystallinity of the polymer matrix, 19,20 the interfacial interaction between ller and the polymer matrix, [21][22][23][24] and dispersibility of individuated llers in the polymer matrix. 6,17,25 Accordingly, it is indicated that the degree of crystallinity of a polymer is an important parameter to achieve high thermal conductivity of the polymer composites. However, there have been no other alternative but to change the polymer.…”

Section: -18mentioning

confidence: 99%

“…5 Unfortunately, polymers have intrinsically low thermal conductivity. 6 Therefore, highly thermal conductive polymer composites had been typically produced by lling polymers with highly thermal conductive llers, such as carbon materials, 7-9 ceramics 10 and metals.…”

Section: Introductionmentioning

confidence: 99%

Chemical assembling of amine functionalized boron nitride nanotubes onto polymeric nanofiber film for improving their thermal conductivity

Kim¹,

Choi

et al. 2018

RSC Adv.

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The interfacial effect between an organic matrix and inorganic nanofillers on the thermal conductivity of a polymer composite was systematically explored by assembling amine-functionalized boron nitride nanotubes (BNNTs) onto an electrospun polyacrylic acid/polyvinyl alcohol nanofibrous web through either physical electrostatic interactions or chemical coupling reactions. The amine functionalization of BNNTs and their integration onto the electrospun nanofiber webs were confirmed by various analytical techniques. No distinctive change in thermal stability and conductivity could be observed between the pristine-and physically assembled polymeric nanofiber films; however, the chemically assembled nanofiber film produced via the chemical coupling reaction showed large improvements in both thermal stability and thermal conductivity. Our study demonstrated that it is possible to produce a highly thermally conductive polymer nanofiber film through interfacial engineering, even if the incorporation of inorganic filler is below 1 wt%.

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Largely Enhanced Thermal Conductivity and High Dielectric Constant of Poly(vinylidene fluoride)/Boron Nitride Composites Achieved by Adding a Few Carbon Nanotubes

Cited by 207 publications

References 63 publications

Thermal conductivity of polymers and polymer nanocomposites

Thermal conductivity of polymers and polymer nanocomposites

Huge thermal conductivity enhancement in boron nitride – ethylene glycol nanofluids

Chemical assembling of amine functionalized boron nitride nanotubes onto polymeric nanofiber film for improving their thermal conductivity

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