Fabrication, characterization, morphological and thermal investigations of functionalized multi-walled carbon nanotubes reinforced epoxy nanocomposites

Ali, Farman; Ishfaq, Noshaba; Said, Amir; Nawaz, Zahid; Ali, Zarshad; Ali, Nisar; Afzal, Adeel; Bilal, Muhammad

doi:10.1016/j.porgcoat.2020.105962

Cited by 26 publications

(15 citation statements)

References 39 publications

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“…The SEM image in Figure 10d shows that the MWCNTs were pulled out from the crack-oriented area and underwent debonding. Ali et al [52] have also demonstrated this in their research. The fracture shows that the MWCNTs and epoxy had strong adhesion and interfacial contact between them.…”

Section: Fracture Surface Morphologymentioning

confidence: 60%

Physical, Thermal Transport, and Compressive Properties of Epoxy Composite Filled with Graphitic- and Ceramic-Based Thermally Conductive Nanofillers

et al. 2022

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Epoxy polymer composites embedded with thermally conductive nanofillers play an important role in the thermal management of polymer microelectronic packages, since they can provide thermal conduction properties with electrically insulating properties. An epoxy composite system filled with graphitic-based fillers; multi-walled carbon nanotubes (MWCNTs), graphene nanoplatelets (GNPs) and ceramic-based filler; silicon carbide nanoparticles (SiCs) was investigated as a form of thermal-effective reinforcement for epoxy matrices. The epoxy composites were fabricated using a simple fabrication method, which included ultrasonication and planetary centrifugal mixing. The effect of graphite-based and ceramic-based fillers on the thermal conductivity was measured by the transient plane source method, while the glass transition temperature of the fully cured samples was studied by differential scanning calorimetry. Thermal gravimetric analysis was adopted to study the thermal stability of the samples, and the compressive properties of different filler loadings (1–5 vol.%) were also discussed. The glass temperatures and thermal stabilities of the epoxy system were increased when incorporated with the graphite- and ceramic-based fillers. These results can be correlated with the thermal conductivity of the samples, which was found to increase with the increase in the filler loadings, except for the epoxy/SiCs composites. The thermal conductivity of the composites increased to 0.4 W/mK with 5 vol.% of MWCNTs, which is a 100% improvement over pure epoxy. The GNPs, SiCs, and MWCNTs showed uniform dispersion in the epoxy matrix and well-established thermally conductive pathways.

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Section: Fracture Surface Morphologymentioning

confidence: 60%

Physical, Thermal Transport, and Compressive Properties of Epoxy Composite Filled with Graphitic- and Ceramic-Based Thermally Conductive Nanofillers

et al. 2022

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“…Given the high relevance of carbon allotropes-based nanocomposites for various applications, such as sensing [ 34 , 36 ], energy storage [ 56 ], development of protective coatings [ 57 ], and membranes for wastewater treatment [ 58 ], there is an increased interest in the community in correlating the specific functional properties with the electrical and mechanical properties of the nanocomposite, while considering the type and specific geometrical properties of the constituents [ 59 , 60 , 61 ].…”

Section: Discussionmentioning

confidence: 99%

Electrical Percolation Threshold and Size Effects in Polyvinylpyrrolidone-Oxidized Single-Wall Carbon Nanohorn Nanocomposite: The Impact for Relative Humidity Resistive Sensors Design

Serban

Cobianu

Dumbrǎvescu

et al. 2021

Sensors

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This paper reports, for the first time, on the electrical percolation threshold in oxidized carbon nanohorns (CNHox)–polyvinylpyrrolidone (PVP) films. We demonstrate—starting from the design and synthesis of the layers—how these films can be used as sensing layers for resistive relative humidity sensors. The morphology and the composition of the sensing layers are investigated through Scanning Electron Microscopy (SEM), Atomic Force Microscopy (AFM), and RAMAN spectroscopy. For establishing the electrical percolation thresholds of CNHox in PVP, these nanocomposite thin films were deposited on interdigitated transducer (IDT) dual-comb structures. The IDTs were processed both on a rigid Si/SiO2 substrate with a spacing of 10 µm between metal digits, and a flexible substrate (polyimide) with a spacing of 100 µm. The percolation thresholds of CNHox in the PVP matrix were equal to (0.05–0.1) wt% and 3.5 wt% when performed on 10 µm-IDT and 100 µm-IDT, respectively. The latter value agreed well with the percolation threshold value of about 4 wt% predicted by the aspect ratio of CNHox. In contrast, the former value was more than an order of magnitude lower than expected. We explained the percolation threshold value of (0.05–0.1) wt% by the increased probability of forming continuous conductive paths at much lower CNHox concentrations when the gap between electrodes is below a specific limit. The change in the nanocomposite’s longitudinal Young modulus, as a function of the concentration of oxidized carbon nanohorns in the polymer matrix, is also evaluated. Based on these results, we identified a new parameter (i.e., the inter-electrode spacing) affecting the electrical percolation threshold in micro-nano electronic devices. The electrical percolation threshold’s critical role in the resistive relative-humidity sensors’ design and functioning is clearly emphasized.

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“…Requirement of high strength material with lighter weight in various engineering industries like automobile, aerospace, biomedical, defence etc. has resulted in a rigorous study on CNT based composite and nanocomposite materials [39,40]. Its outer surface is hydrophobic in nature and chemically inert which makes it suitable in many applications like, CNT-Polymer based film electrode can be successfully utilized to detect glucose in an aqueous system [41,42].…”

Section: Characterization Of Traditional Polymers and Innovations In ...mentioning

confidence: 99%

Characterization of Plastics and Polymers: A Comprehensive Study

Hassan

Srivastwa

Sarkar

et al. 2022

IOP Conf. Ser.: Mater. Sci. Eng.

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Since the beginning of polymer synthesis, a huge modification and development have taken place in this field which resulted in a world where people cannot think of a single day without a polymer product. They are light in weight, affordable and have the potential to provide a similar strength like the traditional metallic objects. As the demand for polymer products is increasing rapidly, its characterization and evaluation of mechanical properties become essential for making a reliable, scientific and cost-effective product design. Recently the incorporation of biopolymers in the global market has made this industry more attractive to consumers and government bodies. But the main challenge lies in its characterization as plastics and polymers found in nature or synthesized artificially have a wide range of physical and chemical properties. So, a particular set of instruments that can evaluate the properties of a group of polymers, may not be usable for a different group with the same accuracy and technique. Researchers are working incessantly to find out effective methods for this purpose and many of them are successful in finding some crucial properties of polymers like strength, elastic modulus, viscosity, hardness etc. The present work briefly discusses the superiority of polymer materials and the research work that has been carried out so far for the characterization of the same. Study on the biopolymer, its characterization and necessity in the context of environmental sustainability are also included in this literature.

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Fabrication, characterization, morphological and thermal investigations of functionalized multi-walled carbon nanotubes reinforced epoxy nanocomposites

Cited by 26 publications

References 39 publications

Physical, Thermal Transport, and Compressive Properties of Epoxy Composite Filled with Graphitic- and Ceramic-Based Thermally Conductive Nanofillers

Physical, Thermal Transport, and Compressive Properties of Epoxy Composite Filled with Graphitic- and Ceramic-Based Thermally Conductive Nanofillers

Electrical Percolation Threshold and Size Effects in Polyvinylpyrrolidone-Oxidized Single-Wall Carbon Nanohorn Nanocomposite: The Impact for Relative Humidity Resistive Sensors Design

Characterization of Plastics and Polymers: A Comprehensive Study

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