Article
Engineering, Multidisciplinary
Juraj Kurimsky, Michal Rajnak, Roman Cimbala
Summary: This paper presents an experimental study on the absorption of high energy pulses in bi-axially oriented polypropylene (BOPP) capacitors. The pulse handling performance test is used to identify the material or mechanical problem characteristics developed in the capacitor. The experiments compare samples with different film metallization and crystallinity in terms of current pulse handling capability and impulse breakdown voltage level.
AIN SHAMS ENGINEERING JOURNAL
(2023)
Article
Polymer Science
Chong Zhang, Xi-Ying Dai, Zhao-Liang Xing, Shao-Wei Guo, Fei Li, Xin Chen, Jian-Jun Zhou, Lin Li
Summary: Polypropylene sheets were studied at different chill roll temperatures and rates. It was found that increasing the chill roll temperature and cast rate promoted crystallinity and beta-form growth. The sheets had asymmetric skin layer structures and the electric breakdown strength was mainly affected by crystallinity. Further stretching the sheets to prepare BOPP films showed that the structure of the sheets influenced the properties of the films. BOPP films cast at high chill roll temperature and rate had the highest crystallinity and electric breakdown strength. The heat setting time had a profound effect on crystallinity and electric breakdown strength, increasing first and then decreasing.
CHINESE JOURNAL OF POLYMER SCIENCE
(2022)
Article
Materials Science, Composites
Bumhee Lee, Uiseok Hwang, Junyoung Kim, Sung-Hoon Kim, Kisuk Choi, In-Kyung Park, Chan Choi, Jonghwan Suhr, Jae-Do Nam
Summary: The high-shear extrusion technique was investigated to effectively disperse graphene nanoplatelets (GNPs) in a polypropylene (PP) matrix. The size of GNP agglomerates decreased as the shear rate increased, resulting in enhanced dielectric loss and frequency-selective characteristics in electromagnetic interference shielding. The developed GNP/PP nanocomposites have promising potential for graphene-based polymer composites.
COMPOSITES COMMUNICATIONS
(2023)
Article
Physics, Multidisciplinary
Akash Mani, Sumit Sharma
Summary: This study evaluated the interfacial properties of pristine carbon nanotube-polypropylene composites using molecular dynamics simulations. The pull-out process was performed for different volume fractions of the carbon nanotubes. The maximum interfacial shear stress was obtained at a volume fraction of 6% for (6,6) armchair SWCNT. The simulations also showed that Stone-Wales defects enhanced the interfacial properties while vacancy defects deteriorated the interfacial shear stress.
Article
Chemistry, Multidisciplinary
Ioan Valentin Tudose, Kyriakos Mouratis, Octavian Narcis Ionescu, Cosmin Romanitan, Cristina Pachiu, Oana Tutunaru-Brincoveanu, Mirela Petruta Suchea, Emmanouel Koudoumas
Summary: This study fabricates graphene nanoplatelets (GNPs) and multiwall carbon nanotubes (CNTs)-polypropylene (PP) composite materials for electromagnetic interference (EMI) shielding applications. The obtained composite materials are not simple physical mixtures of these components but new materials with particular properties, with the filler concentration and nature affecting the nanomaterials' structure and their conductivity. The characteristics of GNPs have a significant effect on their functionality, leading to composites with lower conductivity and less effective EMI shielding. The CNTs-PP composite panels exhibit excellent EMI attenuation when the CNTs concentration is at 10%.
Article
Materials Science, Multidisciplinary
Ziwei Xu, Jingyi Deng, Yongjian Lai, Jianming Chen, Yirong Chen, Shijun Huang, Anfu Chen, Jingjing Zhang, Caihong Lei
Summary: This study investigates the exfoliation mechanism of graphene nanoplatelets (GNP) in polymer melts under elongational flow. The results show that the designed convergent-divergent channel can efficiently exfoliate GNP and significantly enhance the thermal conductivity of the composite material.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Chemistry, Physical
Hani Manssor Albetran
Summary: The sol-gel electrospinning process was used to prepare electrospun carbon nanofibers (ECNFs) from polyacrylonitrile and graphite nanoplatelets. The synthesized ECNFs were characterized by scanning electron microscopy, transmission electron microscopy with energy-dispersive X-ray spectroscopy, and X-ray diffractometry (XRD). The smooth ECNFs with conical platelets and crystallites mainly parallel to the long fiber axis were obtained.
Article
Engineering, Mechanical
Yirong Chen, Jingjing Zhang, Lerong Wang, Qinru Tian, Jiajie Wu, Pengcheng Li, Anfu Chen, Shijun Huang, Caihong Lei
Summary: The tribological performance of carbon-fiber-reinforced polymer (CFRP) incorporated with different content of graphite nanoplatelets (GNPs) was investigated. The orientation of GNPs in the in-plane direction increased with the increase of GNPs content due to high pressure compression molding, which facilitated the formation of GNPs tribofilm during friction. The results of friction experiments showed significant reductions in friction coefficient (44.7%) and wear rate (77.8%) for the CFRP with 15 wt% GNPs.
TRIBOLOGY INTERNATIONAL
(2023)
Article
Engineering, Multidisciplinary
Kelly Yee, Udara M. Kankanamalage, Mergen H. Ghayesh, Yan Jiao, Shahid Hussain, Marco Amabili
Summary: This paper explores the effects of geometric and material imperfections on axially functionally graded graphene nanoplatelets-reinforced viscoelastic beams. By considering different distribution patterns and employing various models and methods, the study investigates the influences of porosity and geometric imperfections on the natural frequencies of the beams. The findings highlight the importance of examining the interactions between different imperfections.
ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS
(2022)
Article
Nanoscience & Nanotechnology
Carlos Herreros-Lucas, Jose Manuel Vila-Fungueirino, Maria del Carmen Gimenez-Lopez
Summary: In this study, a novel method for the preparation of freestanding graphite nanoplatelets (GNP) was developed using dry ball-milling. The results showed that the freestanding GNP, with selective edge functionalization and minimal disruption of the basal plane, exhibited improved performance as both a supercapacitor and a chemical sensor compared to traditional carbon-based materials.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Polymer Science
Xiaoliang Zhao, Dayong Huang, Chinomso M. Ewulonu, Min Wu, Chao Wang, Yong Huang
Summary: This study proposes a new method involving solid-state shear mixing to achieve well-dispersed graphene nanoplatelets within a polymer matrix, leading to significant enhancements in comprehensive properties such as antistatic properties, mechanical properties, and thermal stability. Additionally, the impact strength, heat distortion temperature, and initial decomposition temperature of the nanocomposite are improved, providing an effective reference for industrial preparation of polymer-based graphene nanocomposites.
Article
Materials Science, Multidisciplinary
M. R. Pagnola, F. Morales, P. Tancredi, L. M. Socolovsky
Summary: Graphene nanoplatelets were synthesized by ball milling of synthetic graphite, with oxygen atoms being incorporated into the material after 24 hours of grinding, leading to structural disorder. The presence of oxygen atoms caused significant structural changes in the material.
Article
Polymer Science
Muhammad Tariq, Nabeel Ahmed Utkarsh, Nabeel Ahmed Syed, Amir Hossein Behravesh, Remon Pop-Iliev, Ghaus Rizvi
Summary: This research prepared polypropylene (PP)-graphite composites using melt mixing technique and twin-screw extruder. Graphite, multi-walled carbon nanotubes (MWCNT), carbon black (CB), and expanded graphite (EG) were added to PP in different combinations. Secondary fillers composition were considered as control input factors for optimization. The experiment data were analyzed using ANOVA and the properties of the composites were predicted using response surface methodology (RSM). The empirical models achieved good accuracy in predicting the electrical conductivity and flexural strength of the composites. This study provides potential guidelines for producing electrically conductive thermoplastic composites for bipolar fuel cell plates manufacturing.
Article
Materials Science, Multidisciplinary
Shuangqiao Yang, Zhibo Jin, Chunyang Song, Zhicen Pu, Bianying Wen
Summary: The reasonable structure design of graphite nanoplatelets (GNP) is crucial for achieving high electrical and thermal conductivity in polymer/GNP composites. In this study, high-performance polyethylene composites based on GNP cluster and flake were fabricated, and the composites with GNP cluster exhibited superior performance in functional applications.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
R. Metz, C. Blanc, S. Dominguez, S. Tahir, R. Leparc, M. Hassanzadeh
Summary: This paper presents a novel dielectric composite material with the ability to distribute electric field by itself, which is aimed at grading electrical local surface stress. The material, prepared by dispersing graphite nanoplatelets in a polymer, can be used as a resistive or capacitive field grading material in electronic and electrical applications. The mechanisms behind the nonlinear behavior of the material are discussed.
Article
Chemistry, Applied
G. Carotenuto, C. Camerlingo
MICROPOROUS AND MESOPOROUS MATERIALS
(2020)
Article
Materials Science, Multidisciplinary
Angela Longo, Mariano Palomba, Gianfranco Carotenuto
Article
Nanoscience & Nanotechnology
Abdul Mannan, Sergio De Nicola, Renato Fedele, A. A. Mamun
Summary: The nature of electrostatic and self-gravitational potential structures in an opposite polarity dusty plasma system was identified through numerical analysis. It was found that the plasma system supports dust-acoustic solitary structures with positive and negative self-gravitational potentials but only with positive electrostatic potential. The amplitude of the solitary potential structures decreases with an increase in positive dust number density, and the effects of other dusty plasma parameters on these structures were also identified. Applications of this investigation in various dusty plasma systems were discussed.
Article
Chemistry, Multidisciplinary
Romina Rega, Juan Francisco Munoz Martinez, Vito Pagliarulo, Angela Longo, Mariano Palomba, Gianfranco Carotenuto, Pietro Ferraro, Simonetta Grilli
Summary: The study introduces an innovative technique using the pyroelectric effect in a PPLN crystal to produce a self-supported sheet of PDMS embedding periodic arrays of NiNPs, offering advantages of rapidity, single-step, and electrode-free operation. This method shows promise for various applications in microfluidics and biomedicine.
ADVANCED MATERIALS INTERFACES
(2021)
Article
Physics, Multidisciplinary
Sergio De Nicola, Renato Fedele, Dusan Jovanovic, Margarita A. Man'ko, Vladimir I. Man'ko
Summary: The study explores the tomography of a single quantum particle in an accelerated frame, demonstrating the existence of a Gaussian wave packet solution unaffected by acceleration. The application of Radon transform helps determine the quantum tomogram of the Gaussian state evolution in the accelerated frame.
Article
Materials Science, Multidisciplinary
Ubaldo Coscia, Angela Longo, Mariano Palomba, Andrea Sorrentino, Gianni Barucca, Antonio Di Bartolomeo, Francesca Urban, Giuseppina Ambrosone, Gianfranco Carotenuto
Summary: The study reveals that films deposited on LDPE substrates consisting of overlapped graphite nanoplatelets show stable morphological, structural, and thermoresistive properties when temperature variations are limited between -40 and 40 degrees Celsius. These films can function as temperature sensors and strain gauges with linear temperature-resistance relationship and gauge factor of about 48, respectively.
Article
Materials Science, Multidisciplinary
Gianfranco Carotenuto, Angela Longo, Giuseppe Nenna, Ubaldo Coscia, Mariano Palomba
Summary: The study reveals that epoxy resins can effectively adhere to alkali metal halides, improving the detection of high-energy radiation. Technovit Epox, in particular, showed higher transparency and was functionalized with white powdered pigments to achieve an optically reflective coating on the scintillator surface.
Article
Cell Biology
Adriana Limone, Iolanda Veneruso, Antonella Izzo, Maurizio Renna, Raffaella Bonavita, Silvia Piscitelli, Gaetano Cali, Sergio De Nicola, Patrizia Riccio, Valeria D'Argenio, Antonio Lavecchia, Daniela Sarnataro
Summary: Currently, the therapeutic strategies for neurodegenerative diseases are either ineffective or at early preclinical stages. However, a study has found that NSC48478, a 37/67kDa laminin receptor inhibitor, can induce the conversion of LC3-I to LC3-II and promote autophagy in mouse neuronal cells. This compound mainly activates the non-canonical m-TOR-independent endocytic pathway involving Rab proteins, and upregulates genes related to endocytosis, vesicle fusion and autolysosomal maturation. These findings suggest that NSC48478 could be a useful tool for further studies in pathological conditions.
Article
Chemistry, Analytical
Carlo Camerlingo, Marianna Portaccio, Fabrizia D'Apuzzo, Ludovica Nucci, Letizia Perillo, Maria Lepore
Summary: This study investigated the spectroscopic response of the Amide I band during orthodontic tooth movement (OTM). The results showed that the OTM process induced changes in subcomponents of the Amide I band, attributed to modifications in the secondary structure of proteins. Vibrational spectroscopy is an efficient tool for monitoring the effects of orthodontic force application and gaining attention for personalized treatment in clinical practice.
Review
Chemistry, Physical
Mariano Palomba, Gianfranco Carotenuto, Angela Longo
Summary: The reduced form of graphene oxide (r-GO) is a versatile 2D material with properties similar to graphene, making it useful for various technological applications. Important considerations in producing r-GO include the degree of reduction, dispersion stability, and the use of environmentally friendly and inexpensive reducing agents. L-ascorbic acid (L-aa) has been found to be a suitable green reducing agent for converting GO to r-GO, achieving comparable results to hydrazine. This review summarizes the latest literature on the reduction of GO by L-aa, focusing on liquid-phase and gel-phase reduction approaches, as well as reaction mechanisms and experimental parameters.
Article
Materials Science, Multidisciplinary
Angela Longo, Antonio Di Bartolomeo, Enver Faella, Aniello Pelella, Filippo Giubileo, Andrea Sorrentino, Mariano Palomba, Gianfranco Carotenuto, Gianni Barucca, Alberto Tagliaferro, Ubaldo Coscia
Summary: In this study, large area films were obtained by simply spraying graphite lacquer on glass and LDPE substrates. The morphological, structural, and electrical properties of the films were investigated. The results showed that the films consisted of overlapped graphite platelets and exhibited different resistance behaviors as a function of temperature, which were related to the thermal expansion properties and phase transitions of the substrates.
Editorial Material
Chemistry, Physical
Mariano Palomba, Angela Longo
Review
Pharmacology & Pharmacy
Ugo D'Amora, Sawsan Dacrory, Mohamed Sayed Hasanin, Angela Longo, Alessandra Soriente, Samir Kamel, Maria Grazia Raucci, Luigi Ambrosio, Stefania Scialla
Summary: Graphene oxide (GO) and its reduced form (rGO) have attracted significant interest in the field of biomedical applications, particularly in wound healing, due to their unique physico-chemical properties. The large surface area and functional groups of GO and rGO enable their easy dispersion within various polymeric matrices, resulting in the development of advanced hybrid nanocomposites with tailored properties. These nanocomposites have demonstrated efficient antimicrobial and angiogenic properties, making them advantageous for wound care management. This review discusses the relationship between the structural and physico-chemical properties of GO or rGO/cellulose nanocomposites and their effects on antimicrobial and angiogenic mechanisms in wound healing.
Article
Biochemistry & Molecular Biology
Silvia Trombetti, Nunzia Iaccarino, Patrizia Riccio, Raffaele Sessa, Rosa Catapano, Marcella Salvatore, Stelina Luka, Sergio de Nicola, Paola Izzo, Sante Roperto, Pasqualino Maddalena, Antonio Randazzo, Michela Grosso
Summary: Ferroptosis is a regulated cell death involving lipid peroxidation. GPX4 plays a central role in its regulation. Ferroptosis is connected to lipid metabolism, cancer onset, and drug resistance. GATA-1 isoforms, particularly GATA-1(S), are involved in hematological malignancies. Overexpression of GATA-1(S) prevents ferroptosis in leukemia cells. Targeting ferroptosis is a promising strategy to overcome drug resistance in hematological malignancies.
Proceedings Paper
Materials Science, Multidisciplinary
Antonio Di Bartolomeo, Laura Iemmo, Francesca Urban, Mariano Palomba, Gianfranco Carotenuto, Angela Longo, Andrea Sorrentino, Filippo Giubileo, Gianni Barucca, Massimo Rovere, Alberto Tagliaferro, Giuseppina Ambrosone, Ubaldo Coscia
MATERIALS TODAY-PROCEEDINGS
(2020)
