Carbon nanothreads enable remarkable enhancement in the thermal conductivity of polyethylene

Nanoscale ◽  
2021 ◽  
Vol 13 (14) ◽  
pp. 6934-6943
Author(s):  
Haifei Zhan ◽  
Ying Zhou ◽  
Gang Zhang ◽  
Jihong Zhu ◽  
Weihong Zhang ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Polymer Nanocomposites ◽  
Functional Groups

Polymer nanocomposites with regularly aligned and evenly distributed carbon nanothreads exhibit better thermal conductivity than their counterparts with randomly dispersed nanofillers or nanofillers with functional groups.

A closed-form model for estimating the effective thermal conductivities of carbon nanotube–polymer nanocomposites

2018 ◽  
Vol 233 (8) ◽  
pp. 2909-2919 ◽  
Author(s):  
Reza Moheimani ◽  
M Hasansade
Keyword(s):  
Thermal Conductivity ◽  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Closed Form ◽  
Polymer Nanocomposites ◽  
Micromechanical Model ◽  
Polymer Nanocomposite ◽  
Interfacial Thermal Resistance ◽  
Full Potential ◽  
Thermal Conductivities

This paper describes a closed-form unit cell micromechanical model for estimating the effective thermal conductivities of unidirectional carbon nanotube reinforced polymer nanocomposites. The model incorporates the typically observed misalignment and curvature of carbon nanotubes into the polymer nanocomposites. Also, the interfacial thermal resistance between the carbon nanotube and the polymer matrix is considered in the nanocomposite simulation. The micromechanics model is seen to produce reasonable agreement with available experimental data for the effective thermal conductivities of polymer nanocomposites reinforced with different carbon nanotube volume fractions. The results indicate that the thermal conductivities are strongly dependent on the waviness wherein, even a slight change in the carbon nanotube curvature can induce a prominent change in the polymer nanocomposite thermal conducting behavior. In general, the carbon nanotube curvature improves the nanocomposite thermal conductivity in the transverse direction. However, using the straight carbon nanotubes leads to maximum levels of axial thermal conductivities. With the increase in carbon nanotube diameter, an enhancement in nanocomposite transverse thermal conductivity is observed. Also, the results of micromechanical simulation show that it is necessary to form a perfectly bonded interface if the full potential of carbon nanotube reinforcement is to be realized.

Well dispersed silicon nanospheres synthesized by RF thermal plasma treatment and their high thermal conductivity and dielectric constant in polymer nanocomposites

RSC Advances ◽  
2015 ◽  
Vol 5 (13) ◽  
pp. 9432-9440 ◽  
Author(s):  
Guolin Hou ◽  
Benli Cheng ◽  
Fei Ding ◽  
Mingshui Yao ◽  
Yuebin Cao ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Dielectric Constant ◽  
Plasma Treatment ◽  
Polymer Nanocomposites ◽  
Thermal Plasma ◽  
High Thermal Conductivity ◽  
Large Dielectric Constant ◽  
Rf Thermal Plasma

Nanocomposites with high thermal conductivity and large dielectric constant incorporated with Si nanospheres prepared by thermal plasma are reported.

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