Article
Engineering, Electrical & Electronic
R. M. Ahmed, M. M. Atta, E. O. Taha
Summary: Adding graphene nano-platelets to PVC can enhance the thermal stability and optical properties of the nanocomposites. As the content of graphene nano-platelets increases, the residue of the nanocomposites also increases, while optical parameters are affected.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Engineering, Environmental
Hossein Namdar, Ali Akbari, Reza Yegani, Hossein Roghani-Mamaqani
Summary: Incorporating Asp-functionalized GO nanolayers into PVC nanocomposite membranes showed improved membrane flux, Cr removal efficiency, and fouling resistance. The electrostatic interaction between Cr and HA molecules played a significant role in membrane fouling and cleaning, with the formation of large HA-Cr complexes enhancing Cr removal through membrane filtration.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Chemistry, Multidisciplinary
Emanuela Saracino, Simona Zuppolini, Vincenzo Guarino, Valentina Benfenati, Anna Borriello, Roberto Zamboni, Luigi Ambrosio
Summary: The fabrication of electrically conductive scaffolds using electrospun nanofibers containing gelatin and polyaniline can support the growth and functionality of primary astrocytes. Control of fiber morphology influences the adhesion, proliferation, and functional properties of astrocytes, while providing a permissive and guiding environment. The presence of pnanoparticles does not alter the bioelectrical properties of resting astrocytes, suggesting potential for bioconductive platforms for interfacing and controlling astrocyte properties.
Article
Engineering, Multidisciplinary
Xin Pei, Jincan Cui, Shuling Shen, Hanxun Qiu, Guangzhi Yang, Jing Li
Summary: The electrospun fibres/graphene composite aerogels were assembled with the addition of amino trimethylene phosphonic acid (ATMP) to enhance the mechanical properties and antibacterial capability. The introduction of nanosized-zinc pyrithione on PAN fibre surfaces improved the sterilization ratio of E. coli. The heat treatment at 200 degrees C was critical for the mechanical properties of the composite aerogels.
COMPOSITES PART B-ENGINEERING
(2023)
Article
Chemistry, Physical
Gaurav Khandelwal, Guanbo Min, Xenofon Karagiorgis, Ravinder Dahiya
Summary: In this study, a fully biodegradable TENG composed of aligned PLLA fibers and chitosan as the active layers was reported. The aPLLA fiber based TENG showed superior performance due to better helix chain conformation. The TENG demonstrated excellent mechanical stability and produced a high output power density. This approach provides an attractive green energy harvesting solution for powering portable devices without concerns of electronic waste management.
Article
Materials Science, Multidisciplinary
A. M. El-naggar, Zein K. Heiba, A. M. Kamal, Mohamed Bakr Mohamed
Summary: Polyvinyl chloride/magnesium ferrite/multiwalled carbon nanotubes (PVC-MgFe2O4-MWCNTs) polymer nanocomposites were produced using casting and wet chemical methods. Characterization techniques including XRD, SEM/EDS, and FTIR were employed. Optical properties were investigated using diffused reflectance spectrophotometry, fluorescence, and chromaticity. The synthesized polymer nanocomposites showed potential applications in various optoelectronic settings based on the characterization data.
DIAMOND AND RELATED MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Sahar A. Mousa, Heba Abdallah, S. S. Ibrahim, S. A. Khairy
Summary: Photocatalytic membranes have great potential in energy-efficient water purification and wastewater treatment. In this study, an advanced graphene oxide membrane with improved photocatalytic properties was developed by incorporating tin dioxide and titanium dioxide nanoparticles into a PVC matrix. The addition of nanoparticles increased the membrane's porosity and photocatalytic performance.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2023)
Article
Materials Science, Characterization & Testing
P. Mercea, C. Losher, H. Benz, M. Petrasch, C. Costa, V. W. Stone, V Tosa
Summary: Migration modelling is widely used to test the compliance of polymer articles with standards for drinking water contact. This study investigated the diffusion of organic substances from PVC-U samples and developed a statistical approach to estimate conservative diffusion coefficients for organic substances diffusing in PVC-U. The results provide valuable data for efficient and reliable use of migration modelling with PVC-U materials.
Article
Multidisciplinary Sciences
Shiva Hayati Raad, Zahra Atlasbaf
Summary: Using shell-shaped graphene-based hollow nano-pillars on top of a refractory metal substrate, this paper achieves full solar spectrum coverage with an absorption efficiency of over 96%. The design structure ensures high thermal stability and robustness against harsh environmental conditions, with broadband absorption resulting from impedance matching and the device's tolerance for oblique incidence up to around 65 degrees. The proposed structure can be realized through large-area fabrication techniques.
SCIENTIFIC REPORTS
(2021)
Article
Polymer Science
R. M. Ahmed, A. A. Ibrahiem, A. S. El-Bayoumi, M. M. Atta
Summary: This study investigated the effects of graphene nano-platelets (GnP) loading on the crystalline structure and dielectric properties of PVC, as well as the enhanced conductivity and mechanical strength of the PVC composites. The results showed that increased GnP content led to improved crystalline structure, increased permittivity, enhanced conductivity, and improved mechanical strength of PVC.
INTERNATIONAL JOURNAL OF POLYMER ANALYSIS AND CHARACTERIZATION
(2021)
Article
Chemistry, Analytical
Ibrahim Musa, Guy Raffin, Marie Hangouet, Marie Martin, Joan Bausells, Nadia Zine, Francesca Bellagambi, Nicole Jaffrezic-Renault, Abdelhamid Errachid
Summary: A conductometric microsensor based on electrospun composite nanofibers was developed for detecting methanol vapor. The sensor exhibited high sensitivity, fast response time, and minimal interference from water vapor, making it suitable for volatile organic compound sensing in humid conditions.
MICROCHEMICAL JOURNAL
(2022)
Article
Materials Science, Characterization & Testing
Andreas Frank, Mario Messiha, Thomas Koch, Jan Poduska, Pavel Hutar, Florian Arbeiter, Gerald Pinter
Summary: The study analyzed the applicability of the CRB test according to ISO 18489 for the characterization of SCG in unplasticized PVC-U, showing a clear dependency of SCG resistance on K-value. The results of the CRB test were linearly correlated with the hydrostatic pressure tests of PVC-U pipe grades, accelerating testing times significantly.
Article
Polymer Science
Jubair Ahmed, Tanveer A. Tabish, Shaowei Zhang, Mohan Edirisinghe
Summary: Graphene has been explored for its potential as a membrane material for polymer composite fibers, with recent progress in incorporating porous graphene into high-output polymer fibers. This study successfully demonstrated the production of graphene-loaded microfibers with carrier polymer, and the incorporation of porous graphene into high-output polymer matrices. Analysis using various techniques confirmed the achievement of single layer graphene structures in fibers with diameters ranging from 3-8 μm.
Article
Thermodynamics
Chu Chu, Ping Wang, Abdoulaye Bore, Wenchao Ma, Guanyi Chen, Pan Wang
Summary: This study systematically explores the syngas characteristics and chlorine release behavior during plasma cogasification of PVC and biomass. The results indicate that carbon conversion rate and chlorine release ratio are positively associated with power and steam/carbon ratio. Plasma cogasification of PVC and biomass yields higher H2 proportion and lower chlorine release ratio than mono-gasification. The thermodynamic calculation also verifies the lower percentage of gaseous chlorides from plasma cogasification than mono-gasification.
Article
Chemistry, Physical
Xing Yang, Bin Zhang
Summary: The study investigates the transverse impact responses of three types of twisted bilayers subjected to nano-projectile penetrations at various velocities. Results show that the twist angle has little effect on the critical penetration velocity, with energy absorption primarily through kinetic energy transfer and deformation. As the number of layers increases, the absorption efficiency of bilayers is higher than that of individual monolayers.
APPLIED SURFACE SCIENCE
(2021)
Article
Engineering, Aerospace
Fatma Bakal, Ahmet Yapici, Muharrem Karaaslan, Oguzhan Akgol
Summary: This study investigates the effect of doping element on the microwave absorption performance of hexagonal nano boron nitride (h-nBN)-reinforced basalt fabric (BF)/epoxy composites. Experimental results show that the h-nBN doped composite has good absorption behavior when used with metallic sheets in the 3-18 GHz band, making it suitable for isolation applications at multiple points. The study contributes to the understanding of the radar absorption properties of composite materials using basalt fabric and hexagonal nano boron nitride.
AIRCRAFT ENGINEERING AND AEROSPACE TECHNOLOGY
(2021)
Article
Automation & Control Systems
Sekip Dalgac, Faruk Karadag, Mehmet Bakir, Oguzhan Akgol, Emin Unal, Muharrem Karaaslan
Summary: A chiral metamaterial sensor was developed and tested in this study to determine the quality of motor oils by analyzing reflection coefficient parameters of S-11 and S-22. The study found resonance frequency shifts in clear and dirty motor oil samples, with high sensitivity and quality factor compared to previous studies.
TRANSACTIONS OF THE INSTITUTE OF MEASUREMENT AND CONTROL
(2021)
Article
Telecommunications
Metin Sagik, Olcay Altintas, Emin Unal, Ersin Ozdemir, Mustafa Demirci, Sule Colak, Muharrem Karaaslan
Summary: This study aims to enhance the gain and directivity of microstrip patch antennas by utilizing metamaterial (MTM) structures. The designed MTM structures interact with the antenna to train its frequency, gain, and directivity using artificial neural network technique. The results show improvement in antenna performance through the interaction with MTM structures.
WIRELESS PERSONAL COMMUNICATIONS
(2021)
Article
Chemistry, Multidisciplinary
Yadgar Abdulkarim, Fahmi F. Muhammadsharif, Mehmet Bakir, Halgurd N. Awl, Muharrem Karaaslan, Lianwen Deng, Shengxiang Huang
Summary: The study introduces a novel design of a real-time noninvasive metamaterial sensor, based on a corona-shaped resonator, for efficient detection of glucose in aqueous solutions. The sensor demonstrates good sensitivity and performance, with the ability to distinguish various glucose concentrations effectively.
APPLIED SCIENCES-BASEL
(2021)
Article
Geosciences, Multidisciplinary
Selcuk Kacin, Murat Ozturk, Umur Korkut Sevim, Bayram Ali Mert, Zafer Ozer, Oguzhan Akgol, Emin Unal, Muharrem Karaaslan
Summary: In this study, a triangular array of cylindrical holes was found to act as a local resonator in seismic metamaterials, resisting vibration generator loading in the geophysics concept. Numerical and experimental analyses showed that optimal dimensions and arrangements at a sub-wavelength scale could achieve maximum attenuation against incoming seismic waves at very low frequencies.
Correction
Materials Science, Multidisciplinary
Yadgar I. Abdulkarim, Lianwen Deng, Heng Luo, Shengxiang Huang, Muharrem Karaaslan, Olcay Altintas, Mehmet Bakir, Fahmi F. Muhammadsharif, Halgurd N. Awl, Cumali Sabah, Khalid Saeed Lateef Al-badri
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Engineering, Mechanical
Fatma B. Gumus, Ferhat Ceritbinmez, Ahmet Yapici
Summary: This study aims to investigate the effect of hexagonal nano boron nitride doped epoxy on the mechanical properties and machinability of basalt fiber composites. The composites were prepared using the vacuum bagging method and machined with abrasive water jet machining. Results showed that cutting speed significantly influenced the taper angle and circularity of the machined hole.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART C-JOURNAL OF MECHANICAL ENGINEERING SCIENCE
(2021)
Article
Optics
Hema O. Ali, Asaad M. Al-Hindawi, Yadgar Abdulkarim, Muharrem Karaaslan
Summary: This paper presents a new design of multiband perfect metamaterials absorber (MTMA) for operation in the frequency range of 8-12 GHz, showing good absorption performance and independence. Experimental results demonstrate that the absorber is suitable for military radar applications.
OPTICS COMMUNICATIONS
(2022)
Article
Engineering, Aerospace
Ferhat Ceritbinmez, Ahmet Yapici
Summary: This study investigates the CO2 laser cutting method of MWCNT-doped composite materials and the impact of laser cutting parameters on the machinability of the materials. The results show that increasing laser power increases hardness and decreasing cutting speed reduces kerf, while doping nanoparticles can enhance material strength.
AIRCRAFT ENGINEERING AND AEROSPACE TECHNOLOGY
(2022)
Article
Mechanics
Selcuk Kacin, Murat Ozturk, Umur Korkut Sevim, Muharrem Karaaslan, Zafer Ozer, Oguzhan Akgol, Bayram Ali Mert, Emin Unal
Summary: This study aims to determine phononic crystals that can reduce the effects of earthquakes, construct prototypes, discuss test results numerically and experimentally, and evaluate the optimal dimensions and arrangement of periodic structures through numerical analysis to achieve a shielding effect against seismic waves.
ARCHIVE OF APPLIED MECHANICS
(2022)
Article
Materials Science, Multidisciplinary
Yadgar I. Abdulkarim, Meiyu Xiao, Halgurd N. Awl, Fahmi F. Muhammadsharif, Tingting Lang, Salah Raza Saeed, Fatih Ozkan Alkurt, Mehmet Bakir, Muharrem Karaaslan, Jian Dong
Summary: A triple band metamaterial absorber in the terahertz range has been designed and tested in this study. The absorber shows high absorptivity and sensitivity at specific frequencies, and is polarization insensitive. This design has potential importance in applications such as THz imaging, filtering, biological sensing, and optical communications.
OPTICAL MATERIALS EXPRESS
(2022)
Article
Multidisciplinary Sciences
Yadgar Abdulkarim, Fatih Ozkan Alkurt, Halgurd N. Awl, Olcay Altintas, Fahmi F. Muhammadsharif, Bhargav Appasani, Mehmet Bakir, Muharrem Karaaslan, Mohamed Taouzari, Jian Dong
Summary: A low-profile triple-band metamaterial perfect absorber utilizing an ultra-thin Zinc Selenide substrate for terahertz frequencies was proposed and shown to have highly absorptive peaks at three resonance frequencies. The design exhibited insensitivity to polarization and incident wave angles due to its symmetrical structure, and the effects of various parameters on the absorption and reflection spectra were investigated. Numerical results were validated using High-Frequency Simulation Software and the overall performance of the proposed metamaterial structure was found to be superior compared to existing literature, making it a promising candidate for applications in stealth technology, imaging, and thermal energy harvesting.
Article
Chemistry, Physical
Alin Gheorghita Mazare, Yadgar Abdulkarim, Ayoub Sabir Karim, Mehmet Bakir, Mohamed Taouzari, Fahmi F. Muhammadsharif, Bhargav Appasani, Olcay Altintas, Muharrem Karaaslan, Nicu Bizon
Summary: In this study, a triple band perfect metamaterial absorber based on Pythagorean fractal geometry was proposed and analyzed for terahertz sensing applications. The design exhibited enhanced sensing performance and achieved three intensive absorption peaks within the desired frequency range. The proposed design was found to be sensitive to changes in substrate type, resonator material, substrate thickness, and refractive index of the surrounding medium. The metamaterial sensor demonstrated high sensitivity to variations in thickness at a fixed analyte refractive index, making it suitable for biomedical applications.
Article
Chemistry, Physical
Fatima-ezzahra Zerrad, Mohamed Taouzari, El Mostafa Makroum, Jamal El Aoufi, Salah D. Qanadli, Muharrem Karaaslan, Ahmed Jamal Abdullah Al-Gburi, Zahriladha Zakaria
Summary: In this paper, a wideband antenna is proposed for ultra-wideband microwave imaging applications. The antenna system provides a realized gain of 6 dBi, an efficiency of around 80% on the radiation bandwidth, and a wide impedance bandwidth (S11 < -10 dB) of 6.3 GHz. The proposed antenna demonstrates excellent directionality and less signal distortion, making it suitable for imaging applications.
Article
Engineering, Aerospace
Fatma Bakal Gumus, Ahmet Yapici
Summary: The effect of doping element on the structural, thermal properties, mechanical performance and failure mechanism of h-BN-reinforced basalt fabric/epoxy composites was investigated. It was found that the addition of h-BN particles increased the tensile, bending and impact strength of the composite at certain rates, with 1 Wt. % h-BN addition showing the highest tensile and flexural strength.
AIRCRAFT ENGINEERING AND AEROSPACE TECHNOLOGY
(2023)
