Article
Chemistry, Physical
Ibrahim Dubdub
Summary: This paper aims to investigate the kinetics of polypropylene (PP) polymer pyrolysis using thermogravimetric analysis (TGA). The results show that the activation energy values for PP polymer pyrolysis at different conversions are in good agreement with the values obtained from four model-free methods. Additionally, the most controlling reaction mechanism identified using Criado's method is the geometrical contraction models-cylinder model.
Article
Materials Science, Composites
Jan Sher Khan, Rizwan Akram, Mozaffar Hussain, Saima Rafique, Farrukh Bashir Kayani, Anis Ur Rehman
Summary: Composite fibers of bismuth telluride with polyaniline and polyvinylpyrrolidone were synthesized via electrospinning. The morphology and surface morphology of the fibers were studied using scanning electron microscopy. The X-ray diffraction and Fourier transform infrared spectroscopy confirmed the increase in crystalline phase and revealed the influence of functional groups. The thermogravimetric analysis and diffuse reflectance spectroscopy showed the thermal stability and decreased bandgap of the composite fibers.
POLYMER COMPOSITES
(2023)
Article
Materials Science, Characterization & Testing
Chunrui Lu, Wenlong Ma, Shuhong Ba, Dongxing Zhang
Summary: This study introduced a method for calculating resin content using thermogravimetric analysis (TGA) for carbon fiber/ poly (ether ether ketone) (CF/PEEK) composites. The TGA curves and DTG curves were divided into four stages, and the resin content was accurately obtained from the transitional stage and stable stage. Results compared with other methods showed that the TGA method was suitable for resin fraction calculation with slight difference.
Article
Engineering, Electrical & Electronic
Eman A. Gaml, A. Z. El-Sonabi, M. A. Diab, H. R. Issa
Summary: Complexes of Cu (II) and Co (II) with a specific ligand have been synthesized and characterized. The alternating current conductivity and dielectric properties of these complexes were investigated, revealing their frequency and temperature-dependent behaviors. Different conduction mechanisms were suggested for different complexes.
JOURNAL OF ELECTRONIC MATERIALS
(2022)
Article
Thermodynamics
Sergio Cordova, Kevin Estala-Rodriguez, Evgeny Shafirovich
Summary: The oxidation kinetics of spherical and non-spherical Mg particles in oxygen were investigated in this study. The oxidation process can be modeled as a single-step reaction, with the Avrami-Erofeev model providing the best fit for the experimental thermogravimetric curves. Scanning electron microscopy showed submicron grain formation in the oxidized spherical particles, while slower nucleation in the 30 and 60 µm particles led to sigmoidal thermogravimetric curves.
COMBUSTION AND FLAME
(2022)
Article
Thermodynamics
Wladyslaw Janusz, Ewa Skwarek, Dariusz Sternik, Stanislaw Pikus
Summary: Yttrium citrate was synthesized in aqueous environment through hydrothermal treatment. The product is crystalline yttrium citrate dihydrate, which undergoes thermal decomposition in synthetic air, releasing water and carbon dioxide.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Polymer Science
Lahouari Mrah, Rachid Meghabar
Summary: This study focused on the preparation and characterization of polystyrene/organoclay nanocomposites. By modifying the clay with cetyltrimethylammonium bromide and synthesizing nanocomposites through in situ mass polymerization, significant improvements in thermal stability and mechanical properties were achieved. The morphological and performance enhancements of the nanocomposites were confirmed through various analytical techniques.
Article
Polymer Science
Ibrahim Dubdub
Summary: In this study, thermal cracking of plastic wastes, including polystyrene (PS), low-density polyethylene (LDPE), and polypropylene (PP), was investigated using thermal analysis technique thermogravimetric analyzer (TGA). An artificial neural network (ANN) model was developed to predict the weight fraction of mixed polymers, and the results showed good agreement between the actual and predicted values, indicating the high efficiency of the model in simulating new data.
Article
Polymer Science
Junxiao Li, Lijun Qian, Wang Xi, Yong Qiu, Wei Tang, Shanzhe Li
Summary: The alloying synergistic flame retardant effect of using PEI and ADP for PA6 was investigated, which can provide PA6 composites with excellent mechanical properties and flame retardancy simultaneously. Adding PEI with PA6 can form PEI-PA6 alloy with nice homogeneous phase, which endows PA6 composites with excellent mechanical properties. The addition of ADP can increase the LOI value and flame retardant rating, reduce the HRR and THR, and increase the char residue rate, showing an excellent flame retardant synergistic effect. ADP works together with PEI to increase the quenching effect in the gas phase and promote thermal stability, while also increasing the char yield in the condensed phase. The alloying flame retardant method using ADP/PEI-PA6 can endow PA6 with better flame retardancy and more excellent mechanical properties.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Materials Science, Composites
Wissam Bessa, Djalal Trache, Mehdi Derradji, Houda Ambar, Mokhtar Benziane, Bendiba Guedouar
Summary: In this study, bisphenol A aniline based benzoxazine was reinforced with natural Arundo donax L. fibers treated in different ways at various loadings to investigate the dynamic mechanical properties, morphological stability, and thermal stability of the composites. The results showed that composites reinforced by alkali- or combined-treated fibers exhibited higher storage and loss moduli, indicating great enhancement in properties, likely due to improved fiber-matrix adhesion and compatibility. Additionally, the thermal behavior and char yield of the composites were significantly influenced by the nature of the chemical treatment used on the natural reinforcements.
POLYMER COMPOSITES
(2021)
Article
Thermodynamics
F. L. Zhu, X. Li, Q. Q. Feng
Summary: The study investigated the pyrolysis kinetic mechanism of regenerated cellulosic fiber and composite RCF containing silicon/nitrogen flame retardants, showing that FR treated RCF exhibits enhanced activation energy.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Energy & Fuels
Wasif Farooq, Imtiaz Ali, Salman Raza Naqvi, Mohd Sajid, Hassnain Abbas Khan, Sagir Adamu
Summary: The study demonstrates that the prepared Ni/theta-Al2O3 catalyst significantly enhances the pyrolytic conversion of Parachlorella kessleri HY-6 by reducing the mean activation energy, leading to improved conversion efficiency.
FRONTIERS IN ENERGY RESEARCH
(2021)
Article
Polymer Science
Xiuju Lin, Hao Pang, Daidong Wei, Bing Liao
Summary: In this study, crosslinked polycarboxylate superplasticizers were synthesized using different crosslinking agents, and their performance was characterized. It was found that superplasticizers containing ester groups exhibited better dispersibility, fluidity retention, and adsorption capacity than those containing amide groups. Additionally, the ester-based superplasticizers promoted cement hydration to a greater degree than their amide-based counterparts.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Polymer Science
You Shu, Qionglin Luo, Mingliang Wang, Yuejun Ouyang, Hongwei Lin, Liping Sheng, Shengpei Su
Summary: This study demonstrated that the introduction of L-PVAc into PLA can significantly improve the mechanical and thermal properties of the composites. Furthermore, at a L-PVAc content of 20.0 wt%, the impact strength, elongation at break, glass transition temperature, melting temperature, and degree of crystallinity of the composites were significantly increased compared to pure PLA.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Polymer Science
Ben Liu, Jiacheng Xu, Honglai Xue, Zhongjun Shu, Guoguang Xu, Hongxiang Ou, Yunxuan Weng
Summary: By adding PF@ADP to LDPE, the flame retardancy and mechanical properties of the composite material can be significantly improved, including increasing the limiting oxygen index and UL-94 grade, enhancing the tensile strength and elongation at break, and aiding in reducing the smoke emission of LDPE.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Chemistry, Physical
Giuliana Gorrasi, Valeria Bugatti, Gianluca Viscusi, Vittoria Vittoria
Summary: The paper describes the preparation of a novel material composed of pectin chemically modified with polycaprolactone, which offers a green opportunity to manufacture biodegradable polymers for food packaging as an alternative to traditional non-biodegradable thermoplastics.
COLLOID AND POLYMER SCIENCE
(2021)
Article
Computer Science, Interdisciplinary Applications
Giovanni Spinelli, Patrizia Lamberti, Vincenzo Tucci, Francisco Pasadas, David Jimenez
Summary: Research evaluates the impact of a 10% tolerance in the active channel and top oxide thickness on the characteristics of GFETs through numerical analysis.
MATHEMATICS AND COMPUTERS IN SIMULATION
(2021)
Article
Chemistry, Multidisciplinary
Liberata Guadagno, Patrizia Lamberti, Vincenzo Tucci, Luigi Vertuccio
Summary: Epoxy resins containing multi-wall carbon nanotubes are suitable for manufacturing self-sensing materials in automotive and aeronautic sectors. The choice between different epoxy precursors can significantly impact the crosslinking density and overall performance of the material, making it essential to consider practical application requirements.
Review
Chemistry, Multidisciplinary
Monica La Mura, Patrizia Lamberti, Vincenzo Tucci
Summary: The review discusses techniques for modeling carbon nanotube-based materials using equivalent electrical networks for simulation-assisted design of electronic devices under static and dynamic conditions.
APPLIED SCIENCES-BASEL
(2021)
Article
Materials Science, Multidisciplinary
Alexander V. Kukhta, Alesya G. Paddubskaya, Tatsiana Kulahava, Sergei A. Maksimenko, Tatiana A. Pavich, Patrizia Lamberti, Paolo Ciambelli
Summary: A new nanostructured supramolecular europium complex supported by graphene oxide has been successfully synthesized in this study. The composite material exhibits stability, high luminescence, and electrical conductivity.
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
(2022)
Article
Chemistry, Physical
Patrizia Lamberti, Monica La Mura, Vincenzo Tucci, Erick Nkyalu, Ali Khan, Marina Yakovleva, Nadzeya Valynets, Alesia Paddubskaya, Aleksandr Saushin, Viatcheslav Vanyukov, Marian Baah, Andrzej Urbanowicz, Yuri Svirko, Polina Kuzhir
Summary: This study reports the performance of a graphene-enhanced THz grating. By depositing metal on a micromachined SiO2 substrate, a patterned substrate is obtained. The electromagnetic response of the metasurface composed of graphene and the metal substrate is studied using experimental and numerical simulation methods.
Article
Chemistry, Physical
Giovanni Spinelli, Rosella Guarini, Rumiana Kotsilkova, Todor Batakliev, Evgeni Ivanov, Vittorio Romano
Summary: This study evaluates the temperature effect on the thermophysical properties of nanocomposites made with graphene nanoplatelets (GNPs) reinforced polylactic acid (PLA). The results show that the addition of GNPs significantly improves the thermal conductivity of the material at high temperature. Moreover, the content of GNPs also influences the mechanical properties of the material.
Article
Chemistry, Multidisciplinary
Monica La Mura, Patrizia Lamberti, Vincenzo Tucci
Summary: The interest in graphene-based electronics stems from the unique properties of graphene, which allow for the development of high-performance electronic devices. However, the repeatability of the fabrication process for GFETs is a key issue hindering their commercial diffusion.
Article
Chemistry, Multidisciplinary
Todor Batakliev, Evgeni Ivanov, Verislav Angelov, Giovanni Spinelli, Rumiana Kotsilkova
Summary: The nanomechanical properties of composite specimens based on polylactic acid (PLA) were investigated in this study, which has significant implications for the preparation and characterization of hybrid nanocomposites. Graphene nanoplatelets (GNPs) and multiwall carbon nanotubes (MWCNTs) were used as reinforcing nanoparticles, and a comprehensive analysis including nanoindentation, nanodynamic testing, and nanoscratch experiments was conducted to fully understand the nanoscale surface homogeneity and stress relaxation behavior of the nanocomposite specimens. The research approach contributed to the detection of new nanomechanical features as a function of the type of carbon nanofiller.
Article
Chemistry, Multidisciplinary
Liberata Guadagno, Raffaele Longo, Francesca Aliberti, Patrizia Lamberti, Vincenzo Tucci, Roberto Pantani, Giovanni Spinelli, Michelina Catauro, Luigi Vertuccio
Summary: This study introduces nanocomposites with carbon nanotubes that possess self-sensing and self-heating properties. The interest in these properties has been increasing in various industries, particularly in aerospace and automotive fields. The self-sensing capability allows for the detection of micro-damage by monitoring the residual resistance, while the self-heating function enables control over heating performance. Electrical characterization revealed an electrical percolation threshold of 0.5% weight for carbon nanotubes. The composites displayed purely resistive behavior at carbon nanotube concentrations above this threshold. The material exhibited solid thermal stability up to 300 degrees C, making it suitable for high-temperature applications. SEM investigations and temperature mapping confirmed good dispersion of the conductive filler and uniform heat distribution. The electro-thermal investigation showed the presence of both Positive Temperature Coefficient (PTC) and Negative Temperature Coefficient (NTC) behaviors, with NTC behavior prevailing at temperatures closer to the glass transition temperature of the epoxy resin.
Article
Polymer Science
Elisa Calabrese, Marialuigia Raimondo, Michelina Catauro, Luigi Vertuccio, Patrizia Lamberti, Raffaele Raimo, Vincenzo Tucci, Liberata Guadagno
Summary: This paper evaluates the thermal and electrical characteristics of three commercial unsaturated polyester imide resins (UPIR) to determine which one is more suitable as insulation material for electric motors (high-power induction motors fed by PWM inverters). The selected resin formulations are one-component systems, eliminating the need for external hardeners and allowing for the Vacuum Pressure Impregnation process. These resins have low viscosity, high thermal resistance, and are VOC-free. Thermal analysis shows excellent resistance up to 320°C, while impedance spectroscopy demonstrates their suitability as impregnating resins in secondary insulation applications.
Article
Materials Science, Composites
Xi Liu, Wei Shen, Jincun Fu, Toshiaki Natsuki, Lvtao Zhu
Summary: The 3-D carbon fiber reinforced resin matrix composite tubes were designed and formed using a novel braiding-winding-pultrusion processing technique. The effects of temperature environments on the mechanical responses and damage behaviors of the composite tubes were investigated, and it was found that the structural design of the tubes directly affects their axial bearing capacity.
COMPOSITES SCIENCE AND TECHNOLOGY
(2024)
Article
Materials Science, Composites
Weihao Yuan, Ziyang Zhang, Yueshan Li, Yudong Huang, Zhengxiang Zhong, Zhen Hu
Summary: In this study, the simultaneous self-healing of matrix and interface damage of fiber-reinforced composites was achieved by integrating extrinsic self-healing based on microcapsules and internal self-healing based on coordination interaction. The high exothermic action of epoxy resin and mercaptan repair agent in the self-healing process was observed using infrared thermal imaging technology for in-situ and real-time damage detection.
COMPOSITES SCIENCE AND TECHNOLOGY
(2024)
Article
Materials Science, Composites
Israr Ud Din, Adnan Ahmed, Farah Tarek, Wesley Cantwell, Kamran A. Khan
Summary: In this study, a finite element model driven by XCT was developed to simulate the folding characteristics of origami structures, and the results showed good agreement with experimental data. The study demonstrates the potential application of XCT-driven FE modeling in simulating foldable structures.
COMPOSITES SCIENCE AND TECHNOLOGY
(2024)
Article
Materials Science, Composites
Yishan Yang, Yukang Lai, Song Zhao, Hongguang Chen, Renshu Li, Yongjiang Wang
Summary: This study reports the synthesis of a new transparent fiber reinforced polymer material (tGFRP) with high transparency and superior mechanical properties by controlling the refractive index of epoxy resin and using a novel processing technique.
COMPOSITES SCIENCE AND TECHNOLOGY
(2024)
Article
Materials Science, Composites
Yuhang Liu, Kai Huang, Junfeng Ding, Shangyang Yu, Zhixing Li, Li Zhang, Licheng Guo
Summary: This study proposes a method for accurately predicting the penetration failure load of composites using acoustic emission (AE) data. The method includes a cyclic loading test schedule and an extrapolation method based on uncertainty. The results show that this method can accurately predict the failure load when LR equals 1.
COMPOSITES SCIENCE AND TECHNOLOGY
(2024)
Article
Materials Science, Composites
Jinxia Cai, Bing Xie, Yunliang Jiang, Jinshan Lu, Zeyu Li, Pu Mao, Mohsin Ali Marwat, Haibo Zhang
Summary: This research aims to develop ternary nanocomposites composed of polycarbonate, Al2O3 nanoparticles, and BaTiO3 nanowires for capacitive energy-storage. By optimizing the capacitor materials, the discharge energy density and efficiency have been improved, and the superiority of the ternary polymer nanocomposites for dielectric energy-storage has been validated through finite element analysis.
COMPOSITES SCIENCE AND TECHNOLOGY
(2024)
Article
Materials Science, Composites
Hon Lam Cheung, Mohsen Mirkhalaf
Summary: The aim of this study is to develop physics-based models and establish a structure-property relationship for short fiber composites. High-fidelity full-field simulations are computationally expensive and time-consuming, so the use of artificial neural networks and transfer learning technique is proposed to solve this issue and improve modeling accuracy and efficiency.
COMPOSITES SCIENCE AND TECHNOLOGY
(2024)
Article
Materials Science, Composites
Yue Jiang, Juyoung Leem, Ashley M. Robinson, Shuai Wu, Andy H. Huynh, Dongwon Ka, Ruike Renee Zhao, Yan Xia, Xiaolin Zheng
Summary: The effect of interface engineering on the combustion and mechanical performance of high-loading B/HTPB composites was investigated in this study. It was found that both covalently bonded and nonpolar/nonpolar interfaces effectively reduced the aggregation of B particles, promoting combustion efficiency and burning rate, and enhancing the mechanical properties of the composites.
COMPOSITES SCIENCE AND TECHNOLOGY
(2024)
Article
Materials Science, Composites
R. Mohsenzadeh, B. H. Soudmand, A. H. Najafi, M. Fattahi, D. P. Uyen
Summary: This study examines the morphological features of nano-zeolite nanoparticles incorporated into ultra-high molecular weight polyethylene nanocomposites. The dispersion of nanoparticles within the polymer matrix was improved following nano-zeolite incorporation. The size and distribution of nanoparticles were determined through tailored histograms, and the effective elastic moduli of nanocomposites were calculated, considering interfacial effects.
COMPOSITES SCIENCE AND TECHNOLOGY
(2024)
Article
Materials Science, Composites
Chunming Ji, Jiqiang Hu, Rene Alderliesten, Jinchuan Yang, Zhengong Zhou, Yuguo Sun, Bing Wang
Summary: This paper investigates the effect of impact damage on the fatigue behavior of CF/PEEK-titanium hybrid laminates. A fatigue life model is proposed to predict the S-N curves of the laminates based on energy dissipation approach. The energy dissipation behavior of the laminates under different experimental conditions is analyzed through post-impact fatigue tests, and the correlation between impact damage and fatigue dissipation energy is determined. The validity of the proposed model is verified through fatigue tests under different stress ratios and impact energy levels.
COMPOSITES SCIENCE AND TECHNOLOGY
(2024)
Article
Materials Science, Composites
Shaokai Hu, Ping Han, Chao Meng, Ying Yu, Shaolong Han, Haoyu Wang, Gang Wei, Zheng Gu
Summary: This study decorates MXene on the surface of carbon fiber using different bonding interactions to improve the interface adhesion and mechanical properties of carbon fiber-reinforced polymers composites (CFRPs). The results demonstrate that CFRPs reinforced by CF-c-MXene show the optimal properties, with significant improvements in impact strength and interfacial shear strength compared to the unsized carbon fiber-reinforced composites.
COMPOSITES SCIENCE AND TECHNOLOGY
(2024)
Article
Materials Science, Composites
Steven U. Mamolo, Henry A. Sodano
Summary: This study demonstrates that chlorination of ANFs and oxygen plasma treatment of carbon fibers enables the formation of a chlorinated ANF (Cl-ANF) interphase, resulting in a 79.8% increase in interfacial shear strength and a 33.7% increase in short beam strength in CFRP composites. This method provides a rapid and reliable process to improve the mechanical properties of CFRPs without degrading the tensile strength of the carbon fibers.
COMPOSITES SCIENCE AND TECHNOLOGY
(2024)
Article
Materials Science, Composites
Yuyang Zhang, Huimin Li, Xin Liu, Yanhong Chen, Chengwei Qin, Daining Fang
Summary: Establishing a prediction model for the mechanical properties of three-dimensional tubular braided composites at different temperatures is of great significance. This study adopted a multi-scale modeling framework based on micro-computed tomography to consider the characteristics of the real yarn cross section and establish a realistic trans-scale finite element model for the composites. The predicted mechanical properties were found to be significantly affected by temperature.
COMPOSITES SCIENCE AND TECHNOLOGY
(2024)
Article
Materials Science, Composites
Shengtao Dai, Fei Yan, Jiaming Guo, Huiru Hu, Yu Liu, Liu Liu, Yuhui Ao
Summary: This study successfully synthesized a hyperbranched waterborne polyurethane sizing agent and cellulose nanocrystal modified zinc oxide nanohybrids to improve the interface and properties of carbon fiber reinforced composites. The modified composites exhibited remarkable enhancements in mechanical properties and exceptional UV resistance.
COMPOSITES SCIENCE AND TECHNOLOGY
(2024)
Article
Materials Science, Composites
Libera Vitiello, Martina Salzano de Luna, Veronica Ambrogi, Giovanni Filippone
Summary: The identification of the percolation threshold in short fiber composites is crucial for assessing material properties and biodegradation speed. In this study, an original rheological approach was used to estimate the percolation threshold of hemp and kenaf-based composites, which showed good agreement with conventional dielectric spectroscopy analyses.
COMPOSITES SCIENCE AND TECHNOLOGY
(2024)
