Structure, thermal conductive, dielectric and electrical insulating properties of UHMWPE/BN composites with a segregated structure

Gao, Chuanwei; Lü, Hui; Ni, Hai‐Ying; Chen, Jun

doi:10.1007/s10965-017-1414-1

Cited by 26 publications

(22 citation statements)

References 55 publications

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“…In addition to adjust the alignment of polymer chains, UHMWPE doped with the thermally conductive llers has also gained signi cant attention. e improved thermal conductivity of UHMWPE composites have been obtained through doping of llers, such as aluminium nitride (AlN) [7,8], boron nitride (BN) [9], silicon nitride (Si 3 N 4 ) [10], silicon carbide (SiC) [11], and aluminium oxide [12].…”

Section: Introductionmentioning

confidence: 99%

Thermal Performances of UHMWPE/BN Composites Obtained from Different Blending Methods

Guo

Cao

Cheng

et al. 2019

Advances in Polymer Technology

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UHMWPE/BN composites were prepared by solvent mixing (SM) in this work, then were characterized by scanning electron microscope (SEM), Raman mapping, differential scanning calorimeter (DSC), thermogravimetric analysis (TG), and thermal conductivity meter to study the morphology, filler distribution, segregated structure, and thermal stability as well as thermal conductivity. Compared to the traditional melt mixing (MM), SM followed by molding contributes to the construction of segregated structures in UHMWPE composite. This segregated structure can greatly improve the thermal conductivity of the composites. The segregated structure of composites prepared by MM is destroyed by shearing. Moreover, the thermal stability of composites by SM is improved with the increment of BN content, which is better than that of samples by MM, probably resulting from the barrier function of the segregated structure.

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Section: Introductionmentioning

confidence: 99%

Thermal Performances of UHMWPE/BN Composites Obtained from Different Blending Methods

Guo

Cao

Cheng

et al. 2019

Advances in Polymer Technology

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“…Therefore, it should be very effective in the fabrication of thin composite films with high in-plane thermal conductivities. [101,138,139] 24.7 [165] 16.3 [200,202] 10.01 [197] 17.61 [196] 12.4 [151] 35.5 [198] 13.1 [199] 18 [201] 9.6 [204] 6.09 [203] F I G U R E 1 0 K eff of composites with arranged filler network versus their filler content in wt% [14,27,51,77,78,80,83,84,86,111,120,124,134,150,159, Lin et al employed tape casting to fabricate the graphene oxide nanofillers (GO) and polyvinyl alcohol (PVA) composite films with high in-plane thermal conductivity of 17.61 Wm À1 K À1 at very low (0.1 wt%) filler content. [231] This very low percolation threshold (0.1 wt% filler content) achieved by the tape casting method was reported to be due to the nanosheet morphology of the filler particles, as well as the filler particles alignment along the planar direction.…”

Section: Arranged Network Composites By Mechanical Forcementioning

confidence: 99%

A review on high thermally conductive polymeric composites

Ghaffari‐Mosanenzadeh

Tafreshi

Dammen‐Brower

et al. 2021

Polymer Composites

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Polymers are known as thermally insulated materials with reported effective thermal conductivity (K eff ) in the range of 0.1 to 0.5 Wm À1 K À1 . However, increasing demand for smaller and more powerful electronics has created the need for thermally conductive polymers for use in heat exchangers and electronic packaging applications. Given this background, much research has been done over the past two decades to increase the K eff of polymers. Based on the strategy involved, those works can be divided into two main categories:(i) increasing the K eff of the neat polymer by aligning its chains orientation; and (ii) increasing polymer K eff by fabrication of polymeric composites with thermally conductive filler networks. Among these two strategies, the former is limited to nanoscale laboratory research and is difficult to scale up for mass production. Therefore, this work is mainly focused on the latter category, thermally conductive polymeric composites, which has a higher potential for large-scale production. This work aims to summarize, evaluate, and highlight the successful strategies of the recent efforts in enhancing the thermal conductivity of polymer composites. The major achievements, future challenges, and the outlooks of high thermally conductive polymeric composites are presented by analyzing the results of about 300 works.

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“…A variety of strategies have been developed. The most widely studied strategies include: (i) using a highly thermal conductive polymeric matrix such as nylon, liquid crystal polymers, or ultrahigh molecular weight polyethylene [ 10 , 11 , 12 ]; (ii) using highly thermal conductive fillers such as graphene, carbon nanotubes (CNTs), boron nitride (BN), and silver nanowires [ 13 , 14 , 15 ]; (iii) increasing filler concentration (volume fraction or mass fraction); (iv) dispersing thermal conductive fillers in a homogenous state [ 16 , 17 , 18 ]; (v) exfoliating two-dimensional (2D) thermal conductive fillers such as graphene and BN [ 19 , 20 , 21 ]; (vi) surface modification of thermal conductive fillers [ 22 , 23 , 24 ]; (vii) orientating thermal conductive fillers along one direction to promote the thermal conductivity in this direction [ 25 , 26 , 27 ]; (viii) making thermal conductive fillers into 3-dimensional (3D) porous structures which act as thermal conductive skeleton in the composites [ 28 , 29 , 30 ]; (ix) using two or more kinds of thermal conductive fillers or using one kind of filler with different sizes to obtain synergism; and (x) constructing thermal conductive pathways in the polymer matrix with templates [ 31 , 32 , 33 ]. These strategies can be used alone, or in combination.…”

Section: Introductionmentioning

confidence: 99%

“…(ix) using two or more kinds of thermal conductive fillers or using one kind of filler with different sizes to obtain synergism; and (x) constructing thermal conductive pathways in the polymer matrix with templates [31][32][33]. These strategies can be used alone, or in combination.…”

Section: Introductionmentioning

confidence: 99%

Hypergravity-Induced Accumulation: A New, Efficient, and Simple Strategy to Improve the Thermal Conductivity of Boron Nitride Filled Polymer Composites

Yuan

Zhang

et al. 2021

Polymers

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Thermal conductive polymer composites (filled type) consisting of thermal conductive fillers and a polymer matrix have been widely used in a range of areas. More than 10 strategies have been developed to improve the thermal conductivity of polymer composites. Here we report a new “hypergravity accumulation” strategy. Raw material mixtures of boron nitride/silicone rubber composites were treated in hypergravity fields (800–20,000 g, relative gravity acceleration) before heat-curing. A series of comparison studies were made. It was found that hypergravity treatments could efficiently improve the microstructures and thermal conductivity of the composites. When the hypergravity was about 20,000 g (relative gravity acceleration), the obtained spherical boron nitride/silicone rubber composites had highly compacted microstructures and high and isotropic thermal conductivity. The highest thermal conductivity reached 4.0 W/mK. Thermal interface application study showed that the composites could help to decrease the temperature on a light-emitting diode (LED) chip by 5 °C. The mechanism of the improved microstructure increased thermal conductivity, and the high viscosity problem in the preparation of boron nitride/silicone rubber composites, and the advantages and disadvantages of the hypergravity accumulation strategy, were discussed. Overall, this work has provided a new, efficient, and simple strategy to improve the thermal conductivity of boron nitride/silicone rubber and other polymer composites (filled type).

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Structure, thermal conductive, dielectric and electrical insulating properties of UHMWPE/BN composites with a segregated structure

Cited by 26 publications

References 55 publications

Thermal Performances of UHMWPE/BN Composites Obtained from Different Blending Methods

Thermal Performances of UHMWPE/BN Composites Obtained from Different Blending Methods

A review on high thermally conductive polymeric composites

Hypergravity-Induced Accumulation: A New, Efficient, and Simple Strategy to Improve the Thermal Conductivity of Boron Nitride Filled Polymer Composites

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