A large increase in the thermal conductivity of carbon nanotube/polymer composites produced by percolation phenomena

Kwon, Su Yong; Kwon, Il Min; Kim, Yong-Gyoo; Lee, Sang‐Hyun; Seo, Young‐Soo

doi:10.1016/j.carbon.2012.12.063

Cited by 94 publications

(59 citation statements)

References 38 publications

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“…Kwon [104] found that the λ value of the multiwalled carbon nanotube/poly(dimethylsiloxane) (MWCNT/PDMS) composites exhibited a sharp increase in the range of 0.2-0.6 vol%. In addition, the λ value of the MWCNT/PDMS composite with 1.4 vol% MWCNT was increased by about 390% than that of the original PDMS (Fig.…”

Section: Thermally Conductive Percolation Theorymentioning

confidence: 99%

A review on thermally conductive polymeric composites: classification, measurement, model and equations, mechanism and fabrication methods

Yang

Liang

et al. 2018

Adv Compos Hybrid Mater

305

124

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With the fast-developing miniaturization and integration of microelectronics packaging materials, ultrahigh-voltage electrical devices, light-emitting diodes (LEDs), and in areas which require good heat dissipation and low thermal expansion, the investigations on the polymeric composites with highly thermal conductivities and excellent thermal stabilities are urgently required, which would be beneficial to transferring the heat to the outside of the products, finally to effectively avoid substantial overheating and prolong their working life. Our article reviews recent progress in the classification, measurement methods, model and equations, mechanisms, commonly used thermally conductive fillers, and the correlative fabrication methods for the thermally conductive polymeric composites, aiming to understand and grasp how to enhance the λ value effectively. And future perspectives, focusing scientific problems and technical difficulties of the present thermally conductive polymeric composites are also described and evaluated.

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Section: Thermally Conductive Percolation Theorymentioning

confidence: 99%

A review on thermally conductive polymeric composites: classification, measurement, model and equations, mechanism and fabrication methods

Yang

Liang

et al. 2018

Adv Compos Hybrid Mater

305

124

View full text Add to dashboard Cite

show abstract

“…However, since polymers are usually poor thermal conductors, with thermal conductivity on the order of 0.1 W/mK, the incorporation of carbon nanotubes still offers significant thermal-conductivity improvements in the resulting CNT/polymer composites [84][85][86][87] . According to previous works [88] , thermal conductivity of epoxy-based composites reinforced with 1.0 vol.% of MWCNTs increased by more than 100% reaching a value around 0.5 W/mK.…”

Section: Properties Of Bp/polymer Compositesmentioning

confidence: 99%

Carbon nanotube buckypaper reinforced polymer composites: a review

et al. 2017

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RbstractThis review provides valuable information about the general characteristics, processing conditions and physical properties of carbon nanotube buckypaper (BP) and its polymer composites. Vacuum filtration is the most common technique used for manufacturing BP, since the carbon nanotubes are dispersed in aqueous solution with the aid of surfactant. Previous works have reported that mechanical properties of BP prepared by vacuum filtration technique are relatively weak. On the other hand, the incorporation of polymer materials in those nanostructures revealed a significant improvement in their mechanical behavior, since the impregnation between matrix and BP is optimized. Electrical conductivity of BP/polymer composites can reach values as high as 2000 S/m, which are several orders of magnitude greater than traditional CNT/polymer composites. Also, BP can improve remarkably the thermal stability of polymer matrices, opening new perspectives to use this material in fire retardant applications.

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“…This could be explained with the conjecture of the heat conduction network which was also proposed by Kwon et al at CNTs loadings of 0.2 vol %-1.4 vol %. 33 The SWCNTs form a rapid heat conduction network through the overlapping heat-affected zones (OHAZs) of SWCNTs. The extremely high thermal conductivity of SWCNT has a heat-affected zone around it.…”

Section: B Effect Of the Dispersion Of Swcnts On The Thermal Conductmentioning

confidence: 99%

Structure factors of carbon nanotubes on the thermal conductivity of carbon nanotube/epoxy composites

Xiao

Luo

et al. 2018

AIP Advances

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The structure factors of carbon nanotubes such as the dispersion, morphology and size have effects on the thermal conductivity of carbon nanotube/epoxy composites (kc). However, the behavior how these structure factors affect the kc has still not been fully understood. To seek the answer, three-dimensional computational models containing various dispersion of bending single wall carbon nanotubes (SWCNTs) are developed using the finite element method. A conjecture is proposed based on these models that the dispersion and the number of the overlapping heat-affected zones (OHAZs) of heat conduction networks play an important role on the kc. To prove the conjecture, a feature parameter–a dispersion coefficient is proposed to quantify the dispersion uniformity. The kc is calculated in models with different dispersion coefficients. The results show that the kc increases with the dispersion coefficient. The effects of the morphology and the size of SWCNTs on the kc could also be explained using this conjecture. SWCNTs with a larger length efficiency and diameter are found to be beneficial to a higher kc. Because a larger length efficiency increases the number of OHAZs and a larger diameter SWCNT has a wider heat-affected zone which also increases the number of OHAZs.

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A large increase in the thermal conductivity of carbon nanotube/polymer composites produced by percolation phenomena

Cited by 94 publications

References 38 publications

A review on thermally conductive polymeric composites: classification, measurement, model and equations, mechanism and fabrication methods

A review on thermally conductive polymeric composites: classification, measurement, model and equations, mechanism and fabrication methods

Carbon nanotube buckypaper reinforced polymer composites: a review

Structure factors of carbon nanotubes on the thermal conductivity of carbon nanotube/epoxy composites

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