scholarly journals Thermal analysis of multi-walled carbon nanotubes material obtained by catalytic pyrolysis of polyethylene

2015 ◽  
Vol 34 (2) ◽  
pp. 373 ◽  
Author(s):  
Aleksandra Buzarovska ◽  
Viktor Stefov ◽  
Metodija Najdoski ◽  
Gordana Bogoeva-Gaceva
Keyword(s):  
Carbon Nanotubes ◽  
Thermal Analysis ◽  
Catalytic Pyrolysis ◽  
Low Cost ◽  
Chemical Recycling ◽  
Waste Plastics ◽  
Heating Rates ◽  
Multiwalled Carbon ◽  
Multi Walled Carbon Nanotubes ◽  
Curve Fitting Method

<h2>Abstract</h2><p>Chemical recycling of nonbiodegradable postconsumer polymers represents a promising route for conversion of waste plastics into feedstock for fuel, chemicals and materials production. Recently, waste plastics have been used as low cost feedstock for carbon nanotubes growth. In this work thermal behavior of multiwalled carbon nanotubes material (MWCNTs), obtained by catalytic pyrolysis of waste low-density polyethylene, has been analyzed. Following the improved protocol, developed few years ago for thermal analysis of CNTs, thermogravimetric analysis of the MWCNTs material has been performed using heating rates of 2-20 <sup>o</sup>C<sup>.</sup>min<sup>-1</sup> and curve fitting method in an attempt to quantify the complex oxidation behavior of the material. It has been shown that competitive oxidation/combustion processes greatly influence the DTG curves and the number of fitted peaks.</p>

Characterization of Mechanical and Viscoelastic Properties of SC-15 Epoxy Nanocomposites Reinforced With Multi-Walled Carbon Nanotubes, Nanoclay and Binary Nanoparticles

2014 ◽  
Author(s):  
Tanjheel H. Mahdi ◽  
Mohammad E. Islam ◽  
Mahesh V. Hosur ◽  
Alfred Tcherbi-Narteh ◽  
S. Jeelani
Keyword(s):  
Carbon Nanotubes ◽  
Epoxy Resin ◽  
Viscoelastic Properties ◽  
Flexural Modulus ◽  
Epoxy Nanocomposites ◽  
Multiwalled Carbon ◽  
Epoxy Resin System ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes ◽  
Binary Nanoparticles

Mechanical and viscoelastic properties of polymer nanocomposites reinforced with carboxyl functionalized multiwalled carbon nanotubes (COOH-MWCNT), montmorillonite nanoclays (MMT) and MWCNT/MMT binary nanoparticle were investigated. In this study, 0.3 wt. % of COOH-MWCNT, 2 wt. % of MMT and 0.1 wt. % COOH-MWCNT/2 wt. % MMT binary nanoparticles by weight of epoxy were incorporated to modify SC-15 epoxy resin system. The nanocomposites were subjected to flexure test, dynamic mechanical and thermomechanical analyses. Morphological study was conducted with scanning electron microscope. Addition of each of the nanoparticles in epoxy showed significant improvement in mechanical and viscoelastic properties compared to those of control ones. But, best results were obtained for addition of 0.1% MWCNT/2% MMT binary nanoparticles in epoxy. Nanocomposites modified with binary nanoparticles exhibited about 20% increase in storage modulus as well as 25° C increase in glass transition temperature. Flexural modulus for binary nanoparticle modified composites depicted about 30% improvement compared to control ones. Thus, improvement of mechanical and viscoelastic properties was achieved by incorporating binary nanoparticles to epoxy nanocomposites. The increase in properties was attributed to synergistic effect of MWCNTs and nanoclay in chemically interacting with each other and epoxy resin as well as in arresting and delaying the crack growth once initiated.

Large scale and low cost synthesis of multiwalled carbon nanotubes by mechanothermal absence catalysts

2010 ◽  
Vol 109 (1) ◽  
pp. 25-30 ◽  
Author(s):  
S A Manafi ◽  
M H Amin ◽  
M R Rahimipour ◽  
E Salahi ◽  
A Kazemzadeh
Keyword(s):  
Carbon Nanotubes ◽  
Multiwalled Carbon Nanotubes ◽  
Large Scale ◽  
Low Cost ◽  
Multiwalled Carbon

Novel ionic bioartificial muscles based on ionically crosslinked multi-walled carbon nanotubes-mediated bacterial cellulose membranes and PEDOT:PSS electrodes

2021 ◽  
Author(s):  
Yaofeng Wang ◽  
Fan Wang ◽  
Yang Kong ◽  
Lei Wang ◽  
Qinchuan Li
Keyword(s):  
Carbon Nanotubes ◽  
Bacterial Cellulose ◽  
Specific Capacitance ◽  
High Performance ◽  
Low Cost ◽  
Actuation Voltage ◽  
Fast Response ◽  
Bending Deformation ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

Abstract High-performance bioartificial muscles with low-cost, large bending deformation, low actuation voltage, and fast response time have drawn extensive attention as the development of human-friendly electronics in recent years. Here, we report a high-performance ionic bioartificial muscle based on the bacterial cellulose (BC)/ionic liquid (IL)/multi-walled carbon nanotubes (MWCNT) nanocomposite membrane and PEDOT:PSS electrode. The developed ionic actuator exhibits excellent electro-chemo-mechanical properties, which are ascribed to its high ionic conductivity, large specific capacitance, and ionically crosslinked structure resulting from the strong ionic interaction and physical crosslinking among BC, IL, and MWCNT. In particular, the proposed BC-IL-MWCNT (0.10 wt%) nanocomposite exhibited significant increments of Young's modulus up to 75% and specific capacitance up to 77%, leading to 2.5 times larger bending deformation than that of the BC-IL actuator. More interestingly, bioinspired applications containing artificial soft robotic finger and grapple robot were successfully demonstrated based on high-performance BC-IL-MWCNT actuator with excellent sensitivity and controllability. Thus, the newly proposed BC-IL-MWCNT bioartificial muscle will offer a viable pathway for developing next-generation artificial muscles, soft robotics, wearable electronic products, flexible tactile devices, and biomedical instruments.

scholarly journals Co-production of hydrogen and carbon nanotubes from catalytic pyrolysis of waste plastics on Ni-Fe bimetallic catalyst

2017 ◽  
Vol 148 ◽  
pp. 692-700 ◽  
Author(s):  
Dingding Yao ◽  
Chunfei Wu ◽  
Haiping Yang ◽  
Yeshui Zhang ◽  
Mohamad A. Nahil ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Catalytic Pyrolysis ◽  
Bimetallic Catalyst ◽  
Waste Plastics ◽  
Production Of Hydrogen

Carbon nanotubes (CNTs) production from catalytic pyrolysis of waste plastics: The influence of catalyst and reaction pressure

2020 ◽  
Vol 351 ◽  
pp. 50-57 ◽  
Author(s):  
Jianqiao Wang ◽  
Boxiong Shen ◽  
Meichen Lan ◽  
Dongrui Kang ◽  
Chunfei Wu
Keyword(s):  
Carbon Nanotubes ◽  
Catalytic Pyrolysis ◽  
Waste Plastics ◽  
Reaction Pressure

scholarly journals Enhancement photocatalytic activity of spinel oxide (Co, Ni)3O4 by combination with carbon nanotubes

2017 ◽  
Vol 19 (3) ◽  
pp. 61-67 ◽  
Author(s):  
Bashaer J. Kahdum ◽  
Abbas J. Lafta ◽  
Amir M. Johdh
Keyword(s):  
Carbon Nanotubes ◽  
Photocatalytic Activity ◽  
Diffuse Reflectance Spectroscopy ◽  
X Rays ◽  
Spinel Oxide ◽  
Reaction Conditions ◽  
Multiwalled Carbon ◽  
Radiation Sources ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

Abstract In this study, some types of composites consisting of multi-walled carbon nanotubes (MWCNTs) and spinel oxide (Co, Ni)3O4 were synthesized by simple evaporation method. These composites were characterized by UV–Vis diffuse reflectance spectroscopy, X-rays diffraction(XRD), Scanning electron microscopy (SEM) and specific surface area(SBET). The photocatalytic activity of the prepared composites was investigated by the following removal of Bismarck brown G (BBG) dye from its aqueous solutions. The obtained results showed that using MWCNTs in combination with spinel oxide to produced composites (spinel/MWCNTs) which succeeded in increasing the activity of spinel oxide and exhibited higher photocatalytic activity than spinel oxide alone. Also it was found that, multiwalled carbon nanotubes were successful in increasing the adsorption and improving the activity of photocatalytic degradation of Bismarck brown G dye(BBG). The obtained results showed that spinel/MWCNTs was more active in dye removal in comparison with each of spinel oxide and MWCNTs alone under the same reaction conditions. Also band gap energies for the prepared composites showed lower values in comparison with neat spinel. This point represents a promising observation as these composites can be excited using a lower energy radiation sources.

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