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Journal articles on the topic 'Graphene Polymer Systems'

Author: Grafiati

Published: 7 September 2023

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1

Kausar, Ayesha, Ishaq Ahmad, and Patrizia Bocchetta. "High-Performance Corrosion-Resistant Polymer/Graphene Nanomaterials for Biomedical Relevance." Journal of Composites Science 6, no. 12 (2022): 362. http://dx.doi.org/10.3390/jcs6120362.

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Initially, pristine polymers were used to develop corrosion-resistant coatings. Later, the trend shifted to the use of polymeric nanocomposites in anti-corrosion materials. In this regard, graphene has been identified as an important corrosion-resistant nanomaterial. Consequently, polymer/graphene nanocomposites have been applied for erosion protection applications. Among polymers, conducting polymers (polyaniline, polypyrrole, polythiophene, etc.) and nonconducting polymers (epoxy, poly(methyl methacrylate), etc.) have been used as matrices for anticorrosion graphene nanocomposites. The corro

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Njoroge, Jean, Arnab Chakrabarty, and Tahir Çağın. "Shockwave Response of Polymer and Polymer Nanocomposites." Materials Science Forum 856 (May 2016): 64–69. http://dx.doi.org/10.4028/www.scientific.net/msf.856.64.

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We present non-equilibrium molecular dynamic simulations of the shock compression of polyurethane and its graphene-based nanocomposite systems. Using the projectile/wall approach, planar shock waves with piston velocity range from 0.1 to 2.5 km/s is applied for both systems. In this study, direct molecular-level simulations of shock-wave generation and propagation are utilized in order to construct the appropriate shock-Hugoniot relations. Through this study, we determined that inclusion of graphene into the polyurethane system has a significant effect on the shock propagation behavior when in

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Kausar, Ayesha, Ishaq Ahmad, M. H. Eisa, and Malik Maaza. "Graphene Nanocomposites in Space Sector—Fundamentals and Advancements." C 9, no. 1 (2023): 29. http://dx.doi.org/10.3390/c9010029.

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Graphene is one of the most significant carbon nanomaterials, with a one-atom-thick two-dimensional nanostructure. Like other nanocarbons, graphene has been used as a polymer reinforcement. This review explores the impact of graphene and graphene-based nanocomposites on aerospace applications. The fabrication and indispensable features of graphene-derived nanocomposites have been considered. Numerous polymers and nanocomposites have been employed for aerospace systems such as reinforced thermosetting/thermoplastic polymers and epoxy/graphene nanocomposites. Moreover, graphene-modified carbon-f

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Ahmed, Jubair, Tanveer A. Tabish, Shaowei Zhang, and Mohan Edirisinghe. "Porous Graphene Composite Polymer Fibres." Polymers 13, no. 1 (2020): 76. http://dx.doi.org/10.3390/polym13010076.

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Since the isolation of graphene, there have been boundless pursuits to exploit the many superior properties that this material possesses; nearing the two-decade mark, progress has been made, but more is yet to be done for it to be truly exploited at a commercial scale. Porous graphene (PG) has recently been explored as a promising membrane material for polymer composite fibres. However, controlling the incorporation of high surface area PG into polymer fibres remain largely unexplored. Additionally, most polymer-graphene composites suffer from low production rates and yields. In this paper, gr

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RAMU, I., Battina N. MALLESWARARAO, J. CHANDRA SEKHAR, M. VENU, and P. SENTHIL KUMAR. "Study on Free Vibration Analysis of a Rotating Fibre-Graphene-Reinforced Hybrid Polymer Composites Pre-Twist Shel." INCAS BULLETIN 15, no. 2 (2023): 149–59. http://dx.doi.org/10.13111/2066-8201.2023.15.2.14.

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The present work aims to develop a computational procedure for investigating the vibration behaviour of pre-twisted laminated composite shell containing graphene inclusions in their matrix. According to nanoscopic empirical equations, graphene's mechanical properties are determined by its size dependence. It has been demonstrated that the orthotropic mechanical properties of composite laminates made from carbon fibres and hybrid matrix can be evaluated. Based on pre-twist and geometric configurations, finite element methods have been used to model hybrid materials shells that include carbon fi

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Chen, Shih-Hsiung, Naveed Ahmad, and Chung-Feng Jeffrey Kuo. "Development of Multifunctional Nano-Graphene-Grafted Polyester to Enhance Thermal Insulation and Performance of Modified Polyesters." Polymers 14, no. 18 (2022): 3821. http://dx.doi.org/10.3390/polym14183821.

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Nano-graphene materials have improved many thermal properties based on polymer systems. The additive polymers’ thermal insulation cannot be significantly increased for use as a reinforcement in multifunctional thermally insulating polymer foam. Herein, we present the development of far-infrared emissivity and antistatic properties using multifunctional nano-graphene polyester fibers. Nano-graphene far-infrared thermal insulation polyester was synthesized with 2% nano-graphene and dispersant polypropylene wax-maleic anhydride (PP wax-MA) using the Taguchi method combined with grey relational an

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Yasinzai, Maimoona, Ghulam Mustafa, Nazia Asghar, et al. "Ion-Imprinted Polymer-Based Receptors for Sensitive and Selective Detection of Mercury Ions in Aqueous Environment." Journal of Sensors 2018 (2018): 1–6. http://dx.doi.org/10.1155/2018/8972549.

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Interdigital electrodes (IDE) coated with ion-imprinted polymers (IIP) as recognition materials have been tested for screening and ion quantification. For screening of receptors, three polymer systems based on styrene (Sty), N-vinylpyrrolidone (NVP), and Sty-co-NVP were examined to identify an efficient recognition system for mercury ions in an aqueous environment. Results showed that all these polymeric systems can detect analyte even in very low concentration, that is, 10 ppm. Ion-imprinted polystyrene system proved to be an ideal receptor for detecting mercury ions in solution with a detect

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8

Rissanou, Anastassia, Apostolos Konstantinou, and Kostas Karatasos. "Morphology and Dynamics in Hydrated Graphene Oxide/Branched Poly(ethyleneimine) Nanocomposites: An In Silico Investigation." Nanomaterials 13, no. 12 (2023): 1865. http://dx.doi.org/10.3390/nano13121865.

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Graphene oxide (GO)—branched poly(ethyleneimine) (BPEI) hydrated mixtures were studied by means of fully atomistic molecular dynamics simulations to assess the effects of the size of polymers and the composition on the morphology of the complexes, the energetics of the systems and the dynamics of water and ions within composites. The presence of cationic polymers of both generations hindered the formation of stacked GO conformations, leading to a disordered porous structure. The smaller polymer was found to be more efficient at separating the GO flakes due to its more efficient packing. The va

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9

Rissanou, N., P. Bačová, A. J. Power, and V. Harmandaris. "Atomistic Molecular Dynamics Simulations of Polymer/Graphene Nanostructured Systems." Materials Today: Proceedings 5, no. 14 (2018): 27472–81. http://dx.doi.org/10.1016/j.matpr.2018.09.066.

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10

Zhang, Jian Wei, Cai Jiang, Gang Shi, and Da Zhi Jiang. "Diffusion of Epoxy Molecules on the Chemically Modified Graphene: A Molecular Dynamics Simulation Study." Materials Science Forum 817 (April 2015): 803–8. http://dx.doi.org/10.4028/www.scientific.net/msf.817.803.

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Buckypaper based polymer composites provides a new technical approach toward realizing conductive/structural multifunctional composites. Resin infiltration in the buckypaper is critical for the fabrication of buckypaper/polymer composites. To investigate the micro-infusion process of the polymer inside the paper, molecular dynamics (MD) simulations are conducted to study the diffusion behavior of epoxy molecules on the modified graphene and between graphene layers. The graphene molecular structures are constructed to represent the wall structures of the carbon nanotubes. Diffusion coefficients

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Plachá, Daniela, Alexandra Muñoz-Bonilla, Kateřina Škrlová, et al. "Antibacterial Character of Cationic Polymers Attached to Carbon-Based Nanomaterials." Nanomaterials 10, no. 6 (2020): 1218. http://dx.doi.org/10.3390/nano10061218.

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The preparation of hybrid polymeric systems based on carbon derivatives with a cationic polymer is described. The polymer used is a copolymer of a quaternizable methacrylic monomer with another dopamine-based monomer capable of anchoring to carbon compounds. Graphene oxide and graphene as well as hybrid polymeric systems were widely characterized by infrared, Raman and photoemission X-ray spectroscopies, electron scanning microscopy, zeta potential and thermal degradation. These allowed confirming the attachment of copolymer onto carbonaceous materials. Besides, the antimicrobial activity of h

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Androulidakis, Ch, D. Sourlantzis, E. N. Koukaras, A. C. Manikas, and C. Galiotis. "Stress-transfer from polymer substrates to monolayer and few-layer graphenes." Nanoscale Advances 1, no. 12 (2019): 4972–80. http://dx.doi.org/10.1039/c9na00323a.

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Jarosinski, Lukasz, Andrzej Rybak, Karolina Gaska, Grzegorz Kmita, Renata Porebska, and Czeslaw Kapusta. "Enhanced thermal conductivity of graphene nanoplatelets epoxy composites." Materials Science-Poland 35, no. 2 (2017): 382–89. http://dx.doi.org/10.1515/msp-2017-0028.

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Abstract Efficient heat dissipation from modern electronic devices is a key issue for their proper performance. An important role in the assembly of electronic devices is played by polymers, due to their simple application and easiness of processing. The thermal conductivity of pure polymers is relatively low and addition of thermally conductive particles into polymer matrix is the method to enhance the overall thermal conductivity of the composite. The aim of the presented work is to examine a possibility of increasing the thermal conductivity of the filled epoxy resin systems, applicable for

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Wang, Emily Z., Yigui Wang, and Dequan Xiao. "Polymer Nanocomposites for Photocatalytic Degradation and Photoinduced Utilizations of Azo-Dyes." Polymers 13, no. 8 (2021): 1215. http://dx.doi.org/10.3390/polym13081215.

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Specially designed polymer nanocomposites can photo-catalytically degrade azo dyes in wastewater and textile effluents, among which TiO2-based nanocomposites are outstanding and extensively explored. Other nanocomposites based on natural polymers (i.e., chitosan and kaolin) and the oxides of Al, Au, B, Bi, Fe, Li, and Zr are commonly used. These nanocomposites have better photocatalytic efficiency than pure TiO2 through two considerations: (i) reducing the hole/electron recombination rate by stabilizing the excited electron in the conducting band, which can be achieved in TiO2-nanocomposites w

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Papageorgiou, Dimitrios G., Zheling Li, Mufeng Liu, Ian A. Kinloch, and Robert J. Young. "Mechanisms of mechanical reinforcement by graphene and carbon nanotubes in polymer nanocomposites." Nanoscale 12, no. 4 (2020): 2228–67. http://dx.doi.org/10.1039/c9nr06952f.

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This in-depth review deals with the subject of how mechanical reinforcement takes place in polymer nanocomposites containing graphene and carbon nanotubes and offers guidelines for the maximization of the performance of such systems.

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Díez-Pascual, Ana M., and Abbas Rahdar. "Graphene-Based Polymer Composites for Flexible Electronic Applications." Micromachines 13, no. 7 (2022): 1123. http://dx.doi.org/10.3390/mi13071123.

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Graphene-based nanomaterials have gained a lot of interest over the last years in flexible electronics due to their exceptional electrical, mechanical, and optoelectronic properties, as well as their potential of surface modification. Their flexibility and processability make them suitable for electronic devices that require bending, folding, and stretching, which cannot be fulfilled by conventional electronics. These nanomaterials can be assembled with various types of organic materials, including polymers, and biomolecules, to generate a variety of nanocomposites with greater stretchability

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Alekseyev, Nikolay I., Ivan K. Khmelnitskiy, Vagarshak M. Aivazyan, Anton P. Broyko, Andrey V. Korlyakov, and Victor V. Luchinin. "Ionic EAP Actuators with Electrodes Based on Carbon Nanomaterials." Polymers 13, no. 23 (2021): 4137. http://dx.doi.org/10.3390/polym13234137.

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Flexible polymer-based actuators, often also called artificial muscles, are an essential part of biomimetic systems that mimic the movement principles of animal world creatures. The most used electrode material to force the actuator move is an ensemble of noble metal nanoparticles in the electroactive polymer surface. Noble metal electrodes have enough electrical conductivity and elasticity and are not subjected to oxidation. However, high cost of such electrodes and their tendency to cracking dictate the need for searching other materials, primarily carbon ones. The review considers several o

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Anagnostopoulos, George, Charalampos Androulidakis, Emmanuel N. Koukaras, et al. "Stress Transfer Mechanisms at the Submicron Level for Graphene/Polymer Systems." ACS Applied Materials & Interfaces 7, no. 7 (2015): 4216–23. http://dx.doi.org/10.1021/am508482n.

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19

Caroline da Silva Rocha, Anne, Lívia Rodrigues Menezes, Emerson Oliveira da Silva, and Maria Clara Guimarães Pedrosa. "Synergistic effect of carbon nanoparticles on the mechanical and thermal properties of poly(lactic acid) as promising systems for packaging." Journal of Composite Materials 54, no. 27 (2020): 4133–44. http://dx.doi.org/10.1177/0021998320927779.

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Due to the high demand of the use of food packaging in the present day, the waste from the material disposal has become a problem of high environmental impact. In this perspective, biodegradable polymers can represent a viable alternative as they degrade after their disposal, thus reducing their environmental impact. The poly(lactic acid) or polylactide is a biodegradable, biocompatible, and compostable polymer, being considered by many authors as one of the most promising biopolymers in industrial applications. However, its low thermal and mechanical properties make it an unfeasible option to

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Tabernero, Antonio, Lucia Baldino, Stefano Cardea, Eva Martín del Valle, and Ernesto Reverchon. "A Phenomenological Approach to Study Mechanical Properties of Polymeric Porous Structures Processed Using Supercritical CO2." Polymers 11, no. 3 (2019): 485. http://dx.doi.org/10.3390/polym11030485.

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This work proposes a modeling of the mechanical properties of porous polymers processed by scCO2, using a phenomenological approach. Tensile and compression tests of alginate/gelatin and cellulose acetate/graphene oxide were modeled using three hyperelastic equations, derived from strain energy functions. The proposed hyperelastic equations provide a fair good fit for mechanical behavior of the nanofibrous system alginate/gelatin (deviations lower than 10%); whereas, due to the presence of the solid in the polymer network, a four-parameter model must be used to fit the composite cellulose acet

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Khan, Mohammad Saleem, and Abdul Shakoor. "Ionic Conductance, Thermal and Morphological Behavior of PEO-Graphene Oxide-Salts Composites." Journal of Chemistry 2015 (2015): 1–6. http://dx.doi.org/10.1155/2015/695930.

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Thin films composites of poly(ethylene oxide)-graphene oxide were fabricated with and without lithium salts by solvent cast method. The ionic conductivity of these composites was studied at various concentrations of salt polymer-GO complexes and at different temperatures. The effects of temperature and graphene oxide concentration were measured from Arrhenius conductance plots. It is shown that the addition of salts in pure PEO increases conductance many times. The graphene oxide addition has enhanced the conductance approximately 1000 times as compared to that of pure PEO. The activation ener

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Pazhamalai, Parthiban, Vimal Kumar Mariappan, Surjit Sahoo, Woo Young Kim, Young Sun Mok, and Sang-Jae Kim. "Free-Standing PVDF/Reduced Graphene Oxide Film for All-Solid-State Flexible Supercapacitors towards Self-Powered Systems." Micromachines 11, no. 2 (2020): 198. http://dx.doi.org/10.3390/mi11020198.

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The development of polymer-based devices has attracted much attention due to their miniaturization, flexibility, lightweight and sustainable power sources with high efficiency in the field of wearable/portable electronics, and energy system. In this work, we proposed a polyvinylidene fluoride (PVDF)-based composite matrix for both energy harvesting and energy storage applications. The physicochemical characterizations, such as X-ray diffraction, laser Raman, and field-emission scanning electron microscopy (FE-SEM) analyses, were performed for the electrospun PVDF/sodium niobate and PVDF/reduce

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Yang, Yue, Jiawen Lv, Baizhu Lin, Yue Cao, Yunji Yi, and Daming Zhang. "Graphene-Assisted Polymer Waveguide Optically Controlled Switch Using First-Order Mode." Polymers 13, no. 13 (2021): 2117. http://dx.doi.org/10.3390/polym13132117.

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All-optical devices have a great potential in optical communication systems. As a new material, graphene has attracted great attention in the field of optics due to its unique properties. We propose a graphene-assisted polymer optically controlled thermo-optic switch, based on the Ex01 mode, which can reduce the absorption loss of graphene. Graphene absorbs 980 nm pump light, and uses the heat generated by ohmic heating to switch on and off the signal light at 1550 nm. The simulation results show that, when the graphene is in the right position, we can obtain the power consumption of 9.5 mW, t

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Memisoglu, Gorkem, Raghavan Chinnambedu Murugesan, Joseba Zubia, and Aleksey G. Rozhin. "Graphene Nanocomposite Membranes: Fabrication and Water Treatment Applications." Membranes 13, no. 2 (2023): 145. http://dx.doi.org/10.3390/membranes13020145.

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Graphene, a two-dimensional hexagonal honeycomb carbon structure, is widely used in membrane technologies thanks to its unique optical, electrical, mechanical, thermal, chemical and photoelectric properties. The light weight, mechanical strength, anti-bacterial effect, and pollution-adsorption properties of graphene membranes are valuable in water treatment studies. Incorporation of nanoparticles like carbon nanotubes (CNTs) and metal oxide into the graphene filtering nanocomposite membrane structure can provide an improved photocatalysis process in a water treatment system. With the rapid dev

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Cao, Yue, Yunji Yi, Yue Yang, et al. "Low Power Consumption 3D-Inverted Ridge Thermal Optical Switch of Graphene-Coated Polymer/Silica Hybrid Waveguide." Micromachines 11, no. 8 (2020): 783. http://dx.doi.org/10.3390/mi11080783.

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An inverted ridge 3D thermal optical (TO) switch of a graphene-coated polymer/silica hybrid waveguide is proposed. The side electrode structure is designed to reduce the mode loss induced by the graphene film and by heating the electrode. The graphene layer is designed to be located on the waveguide to assist in the conduction of heat produced by the electrode. The inverted ridge core is fabricated by etching and spin-coating processes, which can realize the flat surface waveguide. This core improves the transfer of the graphene layer and the compatibility of the fabrication processes. Because

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Rissanou, Anastassia N., and Vagelis Harmandaris. "Dynamics of various polymer–graphene interfacial systems through atomistic molecular dynamics simulations." Soft Matter 10, no. 16 (2014): 2876. http://dx.doi.org/10.1039/c3sm52688g.

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Yuvarani, P., S. Vijayachitra, V. Ranganayaki, et al. "Industrial Waste Water Recycling Using Nanographene Oxide Filters." Advances in Materials Science and Engineering 2021 (July 19, 2021): 1–7. http://dx.doi.org/10.1155/2021/4528949.

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Nanomaterials play a vital role in healthcare, electronics, manufacturing industries, biotechnology, and security systems. One such material is graphene and its oxides are specifically used for recycling industrial waste water. Graphene, a single layer in honeycomb cross section, provides excellent attention because of its significant optical, mechanical, and physical properties. GO was utilized to decrease the acidic or essential centralization of the mechanical wastewater into reusable water for the modern reason utilizing graphene channels. In this paper, sample solution (waste water) is ta

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Nicosia, Angelo, Fabiana Vento, Anna Lucia Pellegrino, et al. "Polymer-Based Graphene Derivatives and Microwave-Assisted Silver Nanoparticles Decoration as a Potential Antibacterial Agent." Nanomaterials 10, no. 11 (2020): 2269. http://dx.doi.org/10.3390/nano10112269.

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Nanocomposites obtained by the decoration of graphene-based materials with silver nanoparticles (AgNPs) have received increasing attention owing to their antimicrobial activity. However, the complex synthetic methods for their preparation have limited practical applications. This study aims to synthesize novel NanoHybrid Systems based on graphene, polymer, and AgNPs (namely, NanoHy-GPS) through an easy microwave irradiation approach free of reductants and surfactants. The polymer plays a crucial role, as it assures the coating layer/substrate compatibility making the platform easily adaptable

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Fu, Guoyu, Dehong Huo, Islam Shyha, Fuzhong Sun, and Qiang Gao. "Machinability investigation of polymer/GNP nanocomposites in micro-milling." International Journal of Advanced Manufacturing Technology 119, no. 3-4 (2021): 2341–53. http://dx.doi.org/10.1007/s00170-021-08471-8.

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AbstractNanoparticles such as graphene have been added to various polymer matrices to enhance the mechanical, thermal, and electrical properties of polymer materials that require complex designs on a microscopic scale. Micro-machining is used to process these nanocomposite materials to achieve high surface quality and dimensional accuracy while maintaining high productivity. In this study, a systematic micro-milling experiment was performed on polymer/graphene nanoplatelet (GNP) nanocomposites to advance knowledge of the micro-machinability of these materials. It evaluates the effect of the ad

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Karode, Nireeksha, Laurence Fitzhenry, Siobhán Matthews, Philip Walsh, and Austin Coffey. "Enhancement of the Mechanical Properties of PEBAX Graphene Nanocomposite Using Supercritical Fluid Assisted Extrusion Polymer Processing Technique." Materials Science Forum 883 (January 2017): 75–84. http://dx.doi.org/10.4028/www.scientific.net/msf.883.75.

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Medical tubing used in minimally invasive devices presents a number of design considerations depending on the material used, design requirements (such as sufficient stiffness, flexibility and biocompatibility) and processing conditions. Currently, manufacturing industries adopt co-extrusion systems to meet design specifications, by using multilayer configuration leading to higher cost per device and increased complexity. This paper investigates the mechanical performance of nanocomposites using supercritical carbon dioxide assisted polymer processing technique. The use of innovative medical co

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Vallés, Cristina, Amr M. Abdelkader, Robert J. Young, and Ian A. Kinloch. "Few layer graphene–polypropylene nanocomposites: the role of flake diameter." Faraday Discuss. 173 (2014): 379–90. http://dx.doi.org/10.1039/c4fd00112e.

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Graphene shows excellent potential as a structural reinforcement in polymer nanocomposites due to its exceptional mechanical properties. We have shown previously that graphene composites can be analysed using conventional composite theory with the graphene flakes acting as short fillers which have a critical length of ∼3 μm which is required for good reinforcement. Herein, polypropylene (PP) nanocomposites were prepared using electrochemically-exfoliated few layer graphene (FLG) with two different flake diameters (5 μm and 20 μm). The crystallization temperature and degree of crystallinity of

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Naveen, Jesuarockiam, Mohammad Jawaid, Kheng Lim Goh, et al. "Advancement in Graphene-Based Materials and Their Nacre Inspired Composites for Armour Applications—A Review." Nanomaterials 11, no. 5 (2021): 1239. http://dx.doi.org/10.3390/nano11051239.

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The development of armour systems with higher ballistic resistance and light weight has gained considerable attention as an increasing number of countries are recognising the need to build up advanced self-defence system to deter potential military conflicts and threats. Graphene is a two dimensional one-atom thick nanomaterial which possesses excellent tensile strength (130 GPa) and specific penetration energy (10 times higher than steel). It is also lightweight, tough and stiff and is expected to replace the current aramid fibre-based polymer composites. Currently, insights derived from the

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Hussin, Nabihah, Asrul Izam Azmi, Mohd Rashidi Salim, et al. "Graphene-polyvinyl alcohol polymer based saturable absorption at 2000 nm region." Indonesian Journal of Electrical Engineering and Computer Science 27, no. 2 (2022): 701. http://dx.doi.org/10.11591/ijeecs.v27.i2.pp701-708.

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A <span>graphene-polyvinyl alcohol (PVA) composite saturable absorption is demonstrated at 2000 nm region. Graphene suspension is produced using low-cost electrochemical exfoliation process. The suspension is mixed with PVA host polymer in 1:1 ratio and left evaporated at room temperature which finally produced graphene-PVA thin film. Thulium doped fiber (TDF) gain medium has been shown to produce a stable Q-switched pulse with a highest repetition rate of 54 kHz, a short pulse duration of 2.89 µs, a maximum peak power of 16 mW, and an estimated maximum pulse energy of 49 nJ. Apparently,

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Prasad Verma, Rajendra, and Sharad Chandra Srivastava. "Discussion on an Overview of Graphene Nanocomposites and Dielectric Elastomers." Journal of Futuristic Sciences and Applications 1, no. 2 (2018): 1–16. http://dx.doi.org/10.51976/jfsa.121801.

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This article examines the most current advancements in dielectric elastomer actuator technology. The adaptability of these actuators makes them helpful in a wide range of situations. Dielectric elastomers, a kind of electroactive polymer, undergo a transformation when subjected to an electric field. When compared to piezoelectric materials, shape memory alloys, ionic polymer metallic materials, and form memory alloys, EAPs' applicability for the design of a broad range of sensors, actuators, and biomedical equipment is better. Because EAPs are able to preserve their original shape even after b

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Stass, Dmitri, and Evgeny Tretyakov. "Estimation of Absolute Spin Counts in Nitronyl Nitroxide-Bearing Graphene Nanoribbons." Magnetochemistry 5, no. 2 (2019): 32. http://dx.doi.org/10.3390/magnetochemistry5020032.

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The degrees of spin labeling of a polyphenylene-based polymer and its graphitized derivative with a stable nitronyl nitroxide were evaluated by estimating the absolute numbers of spins in a set of samples using continuous wave (CW) electron spin resonance (ESR). For these particular systems, the degrees of spin labeling were found to be approximately 0.8% and 1.3%, respectively. The developed procedure complements the more advanced time-resolved/cryogenic ESR studies on these systems by focusing on the stable spin labels introduced in these magnetically intricate materials and providing an est

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Gao, Kai, Wei Li, Xiaoyang Wang, Sai Sun, and Bin Zhang. "Fabrication of AIE Polymer-Functionalized Reduced Graphene Oxide for Information Storage." Molecules 28, no. 17 (2023): 6271. http://dx.doi.org/10.3390/molecules28176271.

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Reduced graphene oxide (RGO) has been extensively studied and applied in optoelectronic systems, but its unstable dispersion in organic solvents has limited its application. To overcome this problem, the newly designed and developed aggregation-induced emission (AIE) material poly[(9,9-bis(6-azidohexyl)-9H-fluorene)-alt-(9-(4-(1,2,2-triphenylvinyl)phenyl)-9H-carbazole)] (PAFTC) was covalently grafted onto RGO to produce (PFTC-g-RGO). The solubility of two-dimensional graphene was improved by incorporating it into the backbone of PAFTC to form new functional materials. In resistive random acces

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Amiryaghoubi, Nazanin, and Marziyeh Fathi. "Bioscaffolds of graphene based-polymeric hybrid materials for myocardial tissue engineering." BioImpacts 14, no. 1 (2023): 27684. http://dx.doi.org/10.34172/bi.2023.27684.

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Introduction: Biomaterials currently utilized for the regeneration of myocardial tissue seem to associate with certain restrictions, including deficiency of electrical conductivity and sufficient mechanical strength. These two factors play an important role in cardiac tissue engineering and regeneration. The contractile property of cardiomyocytes depends on directed signal transmission over the electroconductive systems that happen inside the innate myocardium. Because of their distinctive electrical behavior, electroactive materials such as graphene might be used for the regeneration of cardi

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Orasugh, Jonathan Tersur, and Suprakash Sinha Ray. "Prospect of DFT Utilization in Polymer-Graphene Composites for Electromagnetic Interference Shielding Application: A Review." Polymers 14, no. 4 (2022): 704. http://dx.doi.org/10.3390/polym14040704.

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The improvement in current materials science has prompted a developing need to capture the peculiarities that determine the properties of materials and how they are processed on an atomistic level. Quantum mechanics laws control the interface among atoms and electrons; thus, exact and proficient techniques for fixing the major quantum-mechanical conditions for complex many-particle, many-electron frameworks should be created. Density functional theory (DFT) marks an unequivocal advance in these endeavours. DFT has had a rapid influence on quintessential and industrial research during the last

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Kośla, Katarzyna, Magdalena Olejnik, and Karolina Olszewska. "Preparation and properties of composite materials containing graphene structures and their applicability in personal protective equipment: A Review." REVIEWS ON ADVANCED MATERIALS SCIENCE 59, no. 1 (2020): 215–42. http://dx.doi.org/10.1515/rams-2020-0025.

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AbstractGraphene is a new, advanced material with many possible applications in basic and clinical medicine, electronics and automation. Graphene compounds can be successfully used as an integral part of drug delivery systems, in the construction of transistors, polar processors, touch screens, solar cells and in the production of materials for the manufacture of personal protective equipment, i.e. products and equipment intended to protect the health and life of users. The literature review presented in this paper concerns physical and mechanical properties of composites containing graphene o

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Kang, Dongwoo, Sung Hee Kim, Donghyeok Shin, Ji Taek Oh, Myeong-Gi Kim, and Pyoung-Chan Lee. "Hygroscopic Behavior of Polypropylene Nanocomposites Filled with Graphene Functionalized by Alkylated Chains." Nanomaterials 12, no. 23 (2022): 4130. http://dx.doi.org/10.3390/nano12234130.

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Owing to stringent international environmental and fuel efficiency requirements for lightweight automotive systems, polymer composites have attracted widespread attention. Polypropylene (PP) is a widely employed commercial polymer because of its lightweight and low cost. In this study, PP nanocomposites were fabricated to reduce the moisture absorption of PP composites in automotive headlamp housings. Alkylated chemically modified graphene (CMG-R) was synthesized to reduce the surface hydrophilicity of graphene and increase compatibility with the PP matrix. Fourier transform-infrared spectrosc

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Fang, Haiqiu, Dongfang Yang, Zizhen Su, et al. "Preparation and Application of Graphene and Derived Carbon Materials in Supercapacitors: A Review." Coatings 12, no. 9 (2022): 1312. http://dx.doi.org/10.3390/coatings12091312.

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Graphene has recently attracted a wide range of research interests due to its rigorous two-dimensional structure and extraordinary electrical, thermal and mechanical properties. As a conductive agent, an activated carbon supercapacitor can obtain better performance. This paper summarizes the latest research progress, mainly from two aspects: (1) the preparation of an activated carbon base for a supercapacitor based on waste sugar solution and the relationship between pore structure and activation parameters, and (2) the application of the two-dimensional materials graphene and its composite ma

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Puchalski, Michal, Ewa Skrzetuska, and Izabella Krucińska. "The Possibilities of Graphenes Application in Textronic Devices." Advances in Science and Technology 95 (October 2014): 27–31. http://dx.doi.org/10.4028/www.scientific.net/ast.95.27.

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Graphene, because of its exceptional properties such as very good electrical conductance, flexibility and high optical transparency in visible light spectrum, has proved to be an excellent nanomaterial for modern electronic applications. The natural point of view is to use this new nanomaterial for the development of unique textronic devices such as sensory systems for monitoring human body’s vital functions and atmospheric composition. The present review shows the state of art of materials science and possibilities of the smart textiles design with graphene. The most promising applications of

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Kumar, Sachin Sharma Ashok, Nujud Badawi Mohammed, Osamah Alduhaish, et al. "Anticorrosion, Thermal Degradation, and Hydrophobic Performances of Graphene/TiO2 Nanocomposite Coatings." Polymers 15, no. 11 (2023): 2428. http://dx.doi.org/10.3390/polym15112428.

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Globally, researchers have devoted consistent efforts to producing excellent coating properties since coating plays an essential role in enhancing electrochemical performance and surface quality. In this study, TiO2 nanoparticles in varying concentrations of 0.5, 1, 2, and 3 wt.% were added into the acrylic-epoxy polymeric matrix with 90:10 wt.% (90A:10E) ratio incorporated with 1 wt.% graphene, to fabricate graphene/TiO2 -based nanocomposite coating systems. Furthermore, the properties of the graphene/TiO2 composites were investigated by Fourier-transform infrared spectroscopy (FTIR), thermog

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Kosowska, Karolina, Patrycja Domalik-Pyzik, Małgorzata Krok-Borkowicz, and Jan Chłopek. "Synthesis and Characterization of Chitosan/Reduced Graphene Oxide Hybrid Composites." Materials 12, no. 13 (2019): 2077. http://dx.doi.org/10.3390/ma12132077.

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Graphene family materials (GFM) are currently considered to be one of the most interesting nanomaterials with a wide range of application. They can also be used as modifiers of polymer matrices to develop composite materials with favorable properties. In this study, hybrid nanocomposites based on chitosan (CS) and reduced graphene oxide (rGO) were fabricated for potential use in bone tissue engineering. CS/rGO hydrogels were prepared by simultaneous reduction and composite formation in acetic acid or lactic acid and crosslinked with a natural agent—tannic acid (TAc). A broad spectrum of resear

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Kausar, Ayesha. "Corrosion prevention prospects of polymeric nanocomposites: A review." Journal of Plastic Film & Sheeting 35, no. 2 (2018): 181–202. http://dx.doi.org/10.1177/8756087918806027.

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Corrosion is a serious problem for implementing metallic components and devices in industrial zones. Considerable effort has been made to develop corrosion prevention strategies. Initially, paints, pigments, and organic coatings have been applied to prevent metal corrosion. Consequently, conjugated polymers, epoxy resin, phenolics, acrylic polymers, and many thermoplastics as well as thermoset resins have been used to inhibit corrosion. Lately, nanofillers such as fullerene, nanodiamond, graphene, graphene oxide, carbon nanotube, carbon black, nanoclay, and inorganic nanoparticle have been int

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Stavropoulos, Sotirios G., Aikaterini Sanida, and Georgios C. Psarras. "Carbon Allotropes/Epoxy Nanocomposites as Capacitive Energy Storage/Harvesting Systems." Applied Sciences 11, no. 15 (2021): 7059. http://dx.doi.org/10.3390/app11157059.

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The present work aims at the development and characterization of carbon/polymer matrix nanocomposites, which will be able to operate as compact materials systems for energy storage and harvesting. Series of polymer nanocomposites employing different types of carbon allotropes (carbon black nanoparticles, multi-walled carbon nanotubes, graphene nanoplatelets and nanodiamonds) were developed varying the filler type and content. The energy storage ability of the systems was examined under AC and DC conditions to evaluate the influence of temperature, DC voltage and different types of filler conte

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Jeong, Sung-Yeob, Jun-Uk Lee, Sung-Moo Hong, et al. "Highly Skin-Conformal Laser-Induced Graphene-Based Human Motion Monitoring Sensor." Nanomaterials 11, no. 4 (2021): 951. http://dx.doi.org/10.3390/nano11040951.

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Bio-compatible strain sensors based on elastomeric conductive polymer composites play pivotal roles in human monitoring devices. However, fabricating highly sensitive and skin-like (flexible and stretchable) strain sensors with broad working range is still an enormous challenge. Herein, we report on a novel fabrication technology for building elastomeric conductive skin-like composite by mixing polymer solutions. Our e-skin substrates were fabricated according to the weight of polydimethylsiloxane (PDMS) and photosensitive polyimide (PSPI) solutions, which could control substrate color. An e-s

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Abunahla, Heba, Nahla Alamoodi, Anas Alazzam, and Baker Mohammad. "Micro-Pattern of Graphene Oxide Films Using Metal Bonding." Micromachines 11, no. 4 (2020): 399. http://dx.doi.org/10.3390/mi11040399.

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Recently, graphene has been explored in several research areas according to its outstanding combination of mechanical and electrical features. The ability to fabricate micro-patterns of graphene facilitates its integration in emerging technologies such as flexible electronics. This work reports a novel micro-pattern approach of graphene oxide (GO) film on a polymer substrate using metal bonding. It is shown that adding ethanol to the GO aqueous dispersion enhances substantially the uniformity of GO thin film deposition, which is a great asset for mass production. On the other hand, the presenc

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Salahuddin, Bidita, Shaikh N. Faisal, Tajwar A. Baigh, et al. "Carbonaceous Materials Coated Carbon Fibre Reinforced Polymer Matrix Composites." Polymers 13, no. 16 (2021): 2771. http://dx.doi.org/10.3390/polym13162771.

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Carbon fibre reinforced polymer composites have high mechanical properties that make them exemplary engineered materials to carry loads and stresses. Coupling fibre and matrix together require good understanding of not only fibre morphology but also matrix rheology. One way of having a strongly coupled fibre and matrix interface is to size the reinforcing fibres by means of micro- or nanocarbon materials coating on the fibre surface. Common coating materials used are carbon nanotubes and nanofibres and graphene, and more recently carbon black (colloidal particles of virtually pure elemental ca

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Liu, Feng, Ning Hu, Meng Han, et al. "Investigation of interfacial mechanical properties of graphene-polymer nanocomposites." Molecular Simulation 42, no. 14 (2016): 1165–70. http://dx.doi.org/10.1080/08927022.2016.1154550.

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