scholarly journals Facile and Low Environmental Impact Approach to Prepare Thermally Conductive Nanocomposites Based on Polylactide and Graphite Nanoplatelets

2018 ◽  
Vol 6 (11) ◽  
pp. 14340-14347 ◽  
Author(s):  
Alberto Fina ◽  
Samuele Colonna ◽  
Lorenza Maddalena ◽  
Mauro Tortello ◽  
Orietta Monticelli
Keyword(s):  
Environmental Impact ◽  
Graphite Nanoplatelets ◽  
Conductive Nanocomposites ◽  
Thermally Conductive

scholarly journals Ball-Milled Recycled Lead-Graphite Pencils as Highly Stretchable and Low-Cost Thermal-Interface Materials

Polymers ◽  
2018 ◽  
Vol 10 (7) ◽  
pp. 799 ◽  
Author(s):  
Chun-An Liao ◽  
Yee-Kwan Kwan ◽  
Tien-Chan Chang ◽  
Yiin-Kuen Fuh
Keyword(s):  
Low Cost ◽  
Exfoliated Graphite ◽  
Thermal Interface Materials ◽  
Graphite Nanoplatelets ◽  
Thermal Interface ◽  
Thermally Conductive ◽  
Highly Stretchable ◽  
Exfoliated Graphite Nanoplatelets ◽  
Interface Materials ◽  
Thermal Conductivities

A simple and sustainable production of nanoplatelet graphite at low cost is presented using carbon-based materials, including the recycled lead-graphite pencils. In this work, exfoliated graphite nanoplatelets (EGNs), ball-milled exfoliated graphite nanoplatelets (BMEGNs) and recycled lead-graphite pencils (recycled 2B), as well as thermally cured polydimethylsiloxane (PDMS), are used to fabricate highly stretchable thermal-interface materials (TIMs) with good thermally conductive and mechanically robust properties. Several characterization techniques including scanning electron microscopy (SEM) and thermogravimetric analysis (TGA) showed that recycled nanoplatelet graphite with lateral size of tens of micrometers can be reliably produced. Experimentally, the thermal conductivity was measured for EGNs, BMEGNs and recycled 2B fillers with/without the effect of ball milling. The in-plane thermal conductivities of 12.97 W/mK (EGN), 13.53 W/mK (recycled 2B) and 14.56 W/mK (BMEGN) and through-plane thermal conductivities of 0.76 W/mK (EGN), 0.84 W/mK (recycled 2B) and 0.95 W/mK (BMEGN) were experimentally measured. Anisotropies were calculated as 15.31, 15.98 and 16.95 for EGN, recycled 2B and BMEGN, respectively. In addition, the mechanical robustness of the developed TIMs is such that they are capable of repeatedly bending at 180 degrees with outstanding flexibility, including the low-cost renewable material of recycled lead-graphite pencils. For heat dissipating application in high-power electronics, the TIMs of recycled 2B are capable of effectively reducing temperatures to approximately 6.2 °C as favorably compared with thermal grease alone.

Effect of exfoliated graphite nanoplatelets on thermal and heat deflection properties of kenaf polypropylene hybrid nanocomposites

2016 ◽  
Vol 36 (9) ◽  
pp. 877-889 ◽  
Author(s):  
Christopher Igwe Idumah ◽  
Azman Hassan
Keyword(s):  
Electron Microscopy ◽  
Thermal Conductivity ◽  
Thermal Stability ◽  
Heat Dissipation ◽  
Hybrid Nanocomposites ◽  
Exfoliated Graphite ◽  
Graphite Nanoplatelets ◽  
Uniform Dispersion ◽  
Thermally Conductive ◽  
And Behavior

Abstract Exfoliated graphite nanoplatelet (GNP) polypropylene (PP)/kenaf fiber (KF) hybrid nanocomposites (PP/KF/MAPP/GNP collectively presented as PKMG) were developed through melt extrusion using a co-rotating screw speed extruder. The loadings of GNPs in nanocomposites were varied from 1–5 phr and characterized for thermal conductivity, stability and behavior, morphology, and heat deflection temperature (HDT). Results revealed increasing effective thermal conductivity with increasing inclusion of GNP. This behavior was attributed to the formation of thermally conductive, interconnected, sheets of GNP which enhanced heat dissipation. Thermal stability analysis revealed high thermal residue content at 3 phr loading attributed to uniform dispersion of GNP sheets in polymer matrix and the formation of enhanced oxygen-barrier due to effective char formation. Results also revealed enhanced HDT (0.46 MPa/1.8 MPa) with increasing incorporation of GNP ascribed to high modulus and thermal stability of GNP sheets. This implies capability of material to sustain loading at high temperatures without losing its rigidity. Thermal behavior revealed increased crystallization temperature and reduced degree of crystallization with slight increase in melting temperature in the range of 2–5°C. Morphological analysis using transmission electron microscopy (TEM) and field emission scanning electron microscopy (FESEM) revealed exfoliated and uniform dispersion of graphene in matrix polymer at 3 phr loading.

Thermally Conductive Nanocomposites Based on Epoxy Modified with SiC and POSS

2017 ◽  
Vol 727 ◽  
pp. 553-557 ◽  
Author(s):  
Ji Fang Fu ◽  
Qi Lu ◽  
Pei Song Zong ◽  
Li Ya Chen ◽  
Guo Jun Ding ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Thermal Stability ◽  
Filler Content ◽  
Flexural Properties ◽  
Impact Properties ◽  
Conductive Nanocomposites ◽  
Thermally Conductive

OAPS/SiC/EP, SiC/EP, A151-SiC/EP composites were prepared and their impact properties, flexural properties, thermal conductivity and insulation and thermal stability were investigated. The comparison of three different composites showed that OAPS/SiC/EP composites had best properties. The thermal conductivity of OAPS/SiC/EP composites increased with increasing filler content. The thermal conductivity of OAPS/SiC/EP composites with 20 wt% SiC was 0.34 W/mK and was 55% higher than that of unmodified EP.

Functionalization of AgNWs with amino groups and their application in an epoxy matrix for antistatic and thermally conductive nanocomposites

RSC Advances ◽  
2015 ◽  
Vol 5 (111) ◽  
pp. 91516-91523 ◽  
Author(s):  
Tengyun Zhao ◽  
Chen Zhang ◽  
Zhongjie Du ◽  
Hangquan Li ◽  
Wei Zou
Keyword(s):  
Epoxy Resin ◽  
Epoxy Matrix ◽  
Resin Matrix ◽  
Amino Groups ◽  
Epoxy Nanocomposites ◽  
Epoxy Resin Matrix ◽  
Conductive Nanocomposites ◽  
Thermally Conductive

AgNWs were functionalized to improve their dispersion in an epoxy resin matrix, making AgNW–epoxy nanocomposites with high antistatic and thermal performances.

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