Polymer nanocomposites reinforced with multi-walled carbon nanotubes for semiconducting layers of high-voltage power cables

2010 ◽  
Vol 59 (1) ◽  
pp. 100-106 ◽  
Author(s):  
Kwang-Un Jeong ◽  
Jee Young Lim ◽  
Jong-Young Lee ◽  
Seong Lak Kang ◽  
Changwoon Nah
Keyword(s):  
Carbon Nanotubes ◽  
Polymer Nanocomposites ◽  
High Voltage ◽  
Power Cables ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

scholarly journals Temperature-Dependent Synergistic Effect of Multi-Walled Carbon Nanotubes and Graphene Nanoplatelets on the Tensile Quasi-Static and Fatigue Properties of Epoxy Nanocomposites

Polymers ◽  
2020 ◽  
Vol 13 (1) ◽  
pp. 84
Author(s):  
Yi-Ming Jen ◽  
Hao-Huai Chang ◽  
Chien-Min Lu ◽  
Shin-Yu Liang
Keyword(s):  
Carbon Nanotubes ◽  
Fatigue Strength ◽  
Synergistic Effect ◽  
Polymer Nanocomposites ◽  
Graphene Nanoplatelets ◽  
Temperature Dependent ◽  
Epoxy Nanocomposites ◽  
Hybrid Fillers ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

Even though the characteristics of polymer materials are sensitive to temperature, the mechanical properties of polymer nanocomposites have rarely been studied before, especially for the fatigue behavior of hybrid polymer nanocomposites. Hence, the tensile quasi-static and fatigue tests for the epoxy nanocomposites reinforced with multi-walled carbon nanotubes (CNTs) and graphene nanoplatelets (GNPs) were performed at different temperatures in the study to investigate the temperature-dependent synergistic effect of hybrid nano-fillers on the studied properties. The temperature and the filler ratio were the main variables considered in the experimental program. A synergistic index was employed to quantify and evaluate the synergistic effect of hybrid fillers on the studied properties. Experimental results show that both the monotonic and fatigue strength decrease with increasing temperature significantly. The nanocomposites with a MWCNT (multi-walled CNT): GNP ratio of 9:1 display higher monotonic modulus/strength and fatigue strength than those with other filler ratios. The tensile strengths of the nanocomposite specimens with a MWCNT:GNP ratio of 9:1 are 10.0, 5.5, 12.9, 23.4, and 58.9% higher than those of neat epoxy at −28, 2, 22, 52, and 82 °C, respectively. The endurance limits of the nanocomposites with this specific filler ratio are increased by 7.7, 26.7, 5.6, 30.6, and 42.4% from those of pristine epoxy under the identical temperature conditions, respectively. Furthermore, the synergistic effect for this optimal nanocomposite increases with temperature. The CNTs bridge the adjacent GNPs to constitute the 3-D network of nano-filler and prevent the agglomeration of GNPs, further improve the studied strength. Observing the fracture surfaces reveals that crack deflect effect and the bridging effect of nano-fillers are the main reinforcement mechanisms to improve the studied properties. The pullout of nano-fillers from polymer matrix at high temperatures reduces the monotonic and fatigue strengths. However, high temperature is beneficial to the synergistic effect of hybrid fillers because the nano-fillers dispersed in the softened matrix are easy to align toward the directions favorable to load transfer.

Electrochemical Impedance Studies on Single and Multi-Walled Carbon Nanotubes—Polymer Nanocomposites for Biosensors Development

2015 ◽  
Vol 15 (5) ◽  
pp. 3385-3393 ◽  
Author(s):  
Mihaela Tertiş ◽  
Anca Florea ◽  
Bogdan Feier ◽  
Iuliu Ovidiu Marian ◽  
Luminţa Silaghi-Dumitrescu ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Polymer Nanocomposites ◽  
Electrochemical Impedance ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

scholarly journals Metamaterial Behavior of Polymer Nanocomposites Based on Polypropylene/Multi-Walled Carbon Nanotubes Fabricated by Means of Ultrasound-Assisted Extrusion

Materials ◽  
2016 ◽  
Vol 9 (11) ◽  
pp. 923 ◽  
Author(s):  
Juan Pérez-Medina ◽  
Miguel Waldo-Mendoza ◽  
Víctor Cruz-Delgado ◽  
Zoe Quiñones-Jurado ◽  
Pablo González-Morones ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Polymer Nanocomposites ◽  
Multi Walled Carbon Nanotubes ◽  
Ultrasound Assisted ◽  
Walled Carbon Nanotubes

Preparation and characterization of high-performance wood polymer nanocomposites using multi-walled carbon nanotubes

2016 ◽  
Vol 51 (9) ◽  
pp. 1187-1195 ◽  
Author(s):  
Alperen Kaymakci ◽  
Nadir Ayrilmis ◽  
Turker Gulec ◽  
Mursit Tufan
Keyword(s):  
Carbon Nanotubes ◽  
Maleic Anhydride ◽  
Polymer Nanocomposites ◽  
Wood Flour ◽  
Scanning Calorimetry ◽  
Industrial Grade ◽  
Wood Polymer ◽  
Multi Walled Carbon Nanotube ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

Effect of industrial grade multi-walled carbon nanotubes on mechanical, decay, and thermal properties of wood polymer nanocomposites was investigated. To meet this objective, pine wood flour, polypropylene with and without coupling agent (maleic anhydride grafted polypropylene), and multi-walled carbon nanotube (0, 1, 3, 5 wt%) were compounded in a twin screw co-rotating extruder. The mass ratio of the wood flour to polypropylene was 50/50 (w/w) in all compounds. Test specimens were produced using injection molding machine from the pellets. The flexural and tensile properties, biological durability, and thermal analysis (thermogravimetric analysis and differential scanning calorimetry) of the nanocomposites were investigated. The flexural and tensile properties of the wood polymer nanocomposites increased with increasing content of the industrial grade multi-walled carbon nanotubes (from 1 to 5 wt%) and maleic anhydride grafted polypropylene (3 wt%). The mass loss rates of the wood polymer nanocomposites decreased with increasing amounts of the maleic anhydride grafted polypropylene and industrial grade multi-walled carbon nanotube. The differential scanning calorimetry analysis showed that the melt crystallization enthalpies of the wood polymer nanocomposites increased with increasing amount of the industrial grade multi-walled carbon nanotubes. The increase in the Tc indicated that the industrial grade multi-walled carbon nanotubes were the efficient nucleating agent for the wood polymer nanocomposites.

Piezoresistivity of conductive polymer nanocomposites: Experiment and modeling

2018 ◽  
Vol 37 (17) ◽  
pp. 1085-1098 ◽  
Author(s):  
G Georgousis ◽  
E Kontou ◽  
A Kyritsis ◽  
P Pissis ◽  
M Mičušík ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Polymer Nanocomposites ◽  
Vinylidene Fluoride ◽  
Conductive Polymer ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Relative Resistance ◽  
Resistance Change ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

The piezoresistivity, expressed as the relative resistance variation with imposed strain for conductive polymer nanocomposites, was analyzed by employing two models, developed elsewhere, and a new one proposed in the present work. The corresponding experimental results of three different types of polymer nanocomposites, namely styrene-butadiene rubber reinforced with carbon black and multi walled carbon nanotubes, poly-vinylidene-fluoride and polypropylene reinforced with multi-walled carbon nanotubes, were comparatively studied, on the basis of the employed models. An effort was made to explore the working mechanisms which control the relative resistance change with strain. The effect of polymer type, the strain range and the nano-filler type and weight fraction were investigated.

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