TY - JOUR
T1 - Facile and scalable fabrication of highly thermal conductive polyethylene/graphene nanocomposites by combining solid-state shear milling and FDM 3D-printing aligning methods
AU - Jing, Jingjing
AU - Chen, Yinghong
AU - Shi, Shaohong
AU - Yang, Lu
AU - Lambin, Philippe
N1 - Funding Information:
This work is financially supported by the National Key R&D Program of China (2017YFE0111500), the National Natural Science Foundation of China ( 51433006 ), the European Union’s H2020-MSCA-RISE-734164 Graphene 3D Project, the Program of Innovative Research Team for Young Scientists of Sichuan Province (2016TD0010) and the Fundamental Research Funds for the Central Universities. We would like to thank the Analytical & Testing Center of Sichuan University for providing Materials Studio 8.0 and also Mr. Daichuan Ma for his help of computational simulation.
Funding Information:
This work is financially supported by the National Key R&D Program of China (2017YFE0111500), the National Natural Science Foundation of China (51433006), the European Union's H2020-MSCA-RISE-734164 Graphene 3D Project, the Program of Innovative Research Team for Young Scientists of Sichuan Province (2016TD0010) and the Fundamental Research Funds for the Central Universities. We would like to thank the Analytical & Testing Center of Sichuan University for providing Materials Studio 8.0 and also Mr. Daichuan Ma for his help of computational simulation.
Publisher Copyright:
© 2020 Elsevier B.V.
PY - 2020/12/15
Y1 - 2020/12/15
N2 - Polymer-based thermal conductive composites (PTCs) with both excellent thermal and mechanical properties are highly desirable in the thermal management of modern microelectronic industry. However, the enhancement efficiency for fillers loaded polymer composite is actually lower than the theoretically predicted value. The significant reasons could be due to the restriction of interfacial thermal resistance at filler-polymer matrix interfaces as well as the thermal conductive orientation dependence of anisotropic fillers. In the present study, solid-state shear milling (S3M) strategy and FDM 3D-printing aligning technology were combined to synergistically improve thermal conductivity of linear low-density polyethylene (LLDPE)/graphene nanoplatelet (GNPs) nanocomposites. The fabricated FDM 3D-printed parts exhibit a significantly enhanced through-plane thermal conductivity up to 3.43 W m−1 K−1 along printing direction compared to that of neat LLDPE (0.40 W m−1 K−1) and also that of traditionally melt-compounded LLDPE/GNPs composites (1.98 W m−1 K−1) at the same GNPs loading of 15.0 vol%. The enhanced thermal conductivity is attributed to the long-range aligned bridge-connected network structure of GNPs constructed in the PE matrix along printing direction due to the shear-inducing effect of FDM 3D-printing. Simultaneously, the S3M technology we adopted also reduces the interfacial thermal resistance and thus increases the thermal conductivity of the obtained nanocomposite, which was further demonstrated by the way of theoretical effective medium approximation (EMA) models we applied. The achieved high thermal conductivity and mechanical properties of the FDM 3D-printed LLDPE/GNPs thermal conductive parts suggest promising applications in the heat diffusion of some advanced electronic devices.
AB - Polymer-based thermal conductive composites (PTCs) with both excellent thermal and mechanical properties are highly desirable in the thermal management of modern microelectronic industry. However, the enhancement efficiency for fillers loaded polymer composite is actually lower than the theoretically predicted value. The significant reasons could be due to the restriction of interfacial thermal resistance at filler-polymer matrix interfaces as well as the thermal conductive orientation dependence of anisotropic fillers. In the present study, solid-state shear milling (S3M) strategy and FDM 3D-printing aligning technology were combined to synergistically improve thermal conductivity of linear low-density polyethylene (LLDPE)/graphene nanoplatelet (GNPs) nanocomposites. The fabricated FDM 3D-printed parts exhibit a significantly enhanced through-plane thermal conductivity up to 3.43 W m−1 K−1 along printing direction compared to that of neat LLDPE (0.40 W m−1 K−1) and also that of traditionally melt-compounded LLDPE/GNPs composites (1.98 W m−1 K−1) at the same GNPs loading of 15.0 vol%. The enhanced thermal conductivity is attributed to the long-range aligned bridge-connected network structure of GNPs constructed in the PE matrix along printing direction due to the shear-inducing effect of FDM 3D-printing. Simultaneously, the S3M technology we adopted also reduces the interfacial thermal resistance and thus increases the thermal conductivity of the obtained nanocomposite, which was further demonstrated by the way of theoretical effective medium approximation (EMA) models we applied. The achieved high thermal conductivity and mechanical properties of the FDM 3D-printed LLDPE/GNPs thermal conductive parts suggest promising applications in the heat diffusion of some advanced electronic devices.
KW - Fused deposition molding
KW - Graphene nanoplatelets
KW - Polymer composites
KW - Solid-state shear milling
KW - Thermal conductivity
UR - http://www.scopus.com/inward/record.url?scp=85087996522&partnerID=8YFLogxK
U2 - 10.1016/j.cej.2020.126218
DO - 10.1016/j.cej.2020.126218
M3 - Article
AN - SCOPUS:85087996522
SN - 1385-8947
VL - 402
JO - Chemical Engineering Journal
JF - Chemical Engineering Journal
M1 - 126218
ER -