Article
Materials Science, Ceramics
Jun-Jie Ju, Zheng-Bai Zhao, Xiang-Yun Du, Xin Sun, Ji-Dong Liu, Wei-Li Li
Summary: A facile, eco-friendly, low-cost method is developed to fabricate thermally conductive and anti-corrosive composite coatings. The effects of filler types and contents on the anti-corrosive and thermally conductive properties are researched. The optimized coating exhibits excellent anti-corrosion ability and heat conduction.
CERAMICS INTERNATIONAL
(2023)
Article
Nanoscience & Nanotechnology
Weijun Yang, Hui Ding, Tianxi Liu, Rongxian Ou, Jieying Lin, Debora Puglia, Pengwu Xu, Qingwen Wang, Weifu Dong, Mingliang Du, Piming Ma
Summary: By combining vanillin-based epoxy resin with graphene aerogel, inherently flame-retardant and thermally conductive composites were successfully designed and prepared. The composite material exhibits superior mechanical and thermal properties, making it suitable for the preparation of high-performance biobased flame-retardant materials.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Materials Science, Composites
Xian Wu, Wei Liu, Fa-guo Shi, Le Yang, Chun Zhang
Summary: In this work, a three-dimensional boron nitride framework was fabricated and infiltrated with liquid epoxy resin, resulting in thermally conductive composites with greatly improved heat dissipation capability. This research provides a facile method for developing thermal conductive composites applied in thermal management for electronics.
POLYMER COMPOSITES
(2022)
Article
Engineering, Multidisciplinary
Jiamei Luo, Xueqin Yang, Yi Xue, Chenxi Yang, Zehao Yang, Rogers Tusiime, Yong Liu, Hui Zhang, Jianyong Yu
Summary: In this study, polyether sulfone (PES) and silver nanoparticles functionalized boron nitride nanoplates (AgBNs) were used to enhance the thermal conductivity and mechanical properties of epoxy resin (EP) composites. The addition of silver nanoparticles helped increase the interfacial contact of boron nitride nanoplates, improving the heat conduction paths. The results showed that the inclusion of AgBNs significantly increased the thermal conductivity of the composites, and the introduction of PES improved the mechanical properties.
COMPOSITES PART B-ENGINEERING
(2023)
Article
Materials Science, Composites
Jiamei Luo, Xueqin Yang, Rogers Tusiime, Haonan Chen, Yong Liu, Hui Zhang, Jianyong Yu
Summary: By constructing multiscale synergistic heat conduction channels at a microscopic level and incorporating boron nitride nanoplates/carbon nanotubes into epoxy resin, the thermal conductivity of the epoxy resin can be significantly improved. This method not only enhances the thermal conductivity of the epoxy resin, but also gives it a relatively low dielectric constant, making it suitable for applications in the field of electrical insulation materials.
COMPOSITES COMMUNICATIONS
(2022)
Article
Polymer Science
Duanwei Zhang, Fusheng Liu, Sheng Wang, Mengxi Yan, Xin Hu, Mengying Xu
Summary: This article proposes a method to increase thermal conductivity by improving the matrix's lambda value and reducing interfacial thermal resistance. By designing and synthesizing D-GQDs with specific structures linked to epoxy resin, the thermal conductivity of the composite material was enhanced and a good thermal conductive and insulating packaging material was developed.
Article
Crystallography
Omar Dagdag, Lahoucine El Gana, Rajesh Haldhar, Avni Berisha, Seong-Cheol Kim, Elyor Berdimurodov, Othman Hamed, Shehdeh Jodeh, Ekemini Daniel Akpan, Eno Effiong Ebenso
Summary: In this paper, the characteristics of epoxy resin composite materials with cyclotriphosphazene were investigated using a molecular dynamics simulation approach. The results showed that the addition of cyclotriphosphazene can enhance the thermal conductivity and mechanical properties of epoxy resin, while slightly decreasing the glass transition temperature.
Article
Chemistry, Physical
Mukun Li, Yuyao Sun, Dianying Feng, Kunpeng Ruan, Xia Liu, Junwei Gu
Summary: Ag nanoparticles were grown on MXene nanosheets to prepare MXene@Ag fillers. MXene@Ag/PVA composite films were fabricated and showed improved thermal conductivity and electromagnetic interference shielding. The MXene@Ag-III/PVA composite film exhibited significant enhancements in thermal conductivity coefficient, in-plane and through-plane lambda, and EMI shielding effectiveness compared to pure PVA film.
Review
Materials Science, Multidisciplinary
Filipa A. M. M. Goncalves, Marta Santos, Teresa Cernadas, Patricia Alves, Paula Ferreira
Summary: This review highlights the use of various fillers in epoxy resin systems to improve their properties. The addition of fillers has been found to enhance the toughness of epoxy resins, and carbon nanomaterials and fiber-reinforced polymers are among the most promising fillers. The review also discusses the influence of different fillers on the flame retardancy, mechanical, thermal, and electrical performance of epoxy resin systems.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Materials Science, Composites
Ning Guo, Zifan Tang, Jiaming Sun, Yulong Wang, Lili Li, Junguo Gao
Summary: In this paper, the influence of SiO2 particle size on the nonlinear electrical conductivity and breakdown characteristics of composites made of epoxy resin and micron silicon carbide was investigated. It was found that smaller SiO2 particle sizes resulted in lower current density at high fields and higher breakdown field strength. The addition of 25 μm SiO2 and 2 μm SiO2 slightly increased the nonlinear coefficients and significantly increased the breakdown field strengths. However, the addition of 60 nm SiO2 particles led to the most significant attenuation of conductivity current and enhancement of breakdown field strength, but with a decrease in nonlinear coefficient. Furthermore, increasing SiO2 doping amount resulted in a more obvious decrease in current density and dielectric constant.
POLYMER COMPOSITES
(2023)
Article
Agricultural Engineering
Jing-Jing Lu, Yi-Cheng Shi, Ji-Peng Guan, Rui-Qiong Dang, Li-Chao Yu, Hong-Quan Wang, Ning-Di Hu, Xiao-Jun Shen
Summary: Replacing artificial fibers with natural fibers to fabricate fiber-reinforced resin matrix composites is a research hotspot at present. How to improve the poor compatibility between plant fiber and resin matrix is hot spots in this area. Our work aims to modify RFF reinforced epoxy resin (RFF/EP) composite laminates with silicon polymer (PSOL) and improve the performance of the composite laminates.
INDUSTRIAL CROPS AND PRODUCTS
(2023)
Article
Materials Science, Composites
Jiaying Qu, Lu Fan, Jean Felix Mukerabigwi, Cui Liu, Yu Cao
Summary: In this study, an improved thermal conductive SR composite was successfully synthesized by adding nanodiamond (ND) and boron nitride (BN) as composite thermal conductivity fillers to the terminal hydroxyl functional group of SR. The SR composite filled with 6 phr ND and 70 phr BN showed significantly enhanced thermal conductivity, better thermal stability, and mechanical properties compared to those filled with a single filler. This composite material demonstrated superior performance indicators compared to similar products currently available on the market.
POLYMER COMPOSITES
(2021)
Article
Chemistry, Multidisciplinary
Lidia Orduna, Itziar Otaegi, Nora Aranburu, Gonzalo Guerrica-Echevarria
Summary: Good dispersion and effective curing were achieved in epoxy/CNT nanocomposites using three different ionic liquids (ILs). IL-based epoxy systems showed lower electrical percolation thresholds compared to conventional amine-cured systems. The addition of CNTs improved the adhesive properties of the nanocomposites, while not significantly affecting their thermal or low-strain mechanical properties. ILs can be used as a sustainable alternative to amine-based curing agents for the production of electrically conductive epoxy/CNT nanocomposites and adhesives.
Article
Computer Science, Information Systems
Kaiyi Tian, Senyuan Yang, Jiaxuan Niu, Hanxiang Wang
Summary: Epoxy resin, widely used for its electrical insulation performances, faces limitations in low elongation defects, low thermal conductivity, and high brittleness. Utilizing mesogen in the form of Biphenyl Liquid Crystal Epoxy Resin (BLCER) to improve the traditional epoxy resin, this study shows significant improvements in impact strength, tensile strength, bending strength, and thermal conductivity. Mesogen incorporation leads to enhanced mechanical toughness and thermal conductivity, offering a potential for a variety of properties in epoxy resin without compromising its original performance.
Article
Materials Science, Multidisciplinary
Xubin Wang, Changhai Zhang, Tiandong Zhang, Zhonghua Li, Chao Tang, Qingguo Chi
Summary: This study demonstrates that the thermal conductivity of high thermal conductive Epoxy resin (EP) can be significantly improved by utilizing Al2O3 framework (AF) and boron nitride sheet (BN) as fillers synergistically. Moreover, the combination of AF and BN fillers also improves the dielectric property of EP. The EP composites with high thermal conductivity and excellent dielectric property have great potential for electronic devices.
MACROMOLECULAR MATERIALS AND ENGINEERING
(2022)
Article
Engineering, Mechanical
Temitayo Mufutau Azeez, Lateef Owolabi Mudashiru, Tesleem Babatunde Asafa, Adekunle Akanni Adeleke, Adeyinka Sikiru Yusuff, Peter Pelumi Ikubanni
Summary: This study investigated the effect of temperature and load on the mechanical properties and stress distribution in ECAE processed Al6063. Experimental results showed that billet temperature had a more significant influence on tensile strength and hardness than applied load. The grains in the extrudates became more refined as billet temperature increased. Simulation results indicated that increasing the billet temperature resulted in a more uniform stress distribution with lower magnitude, which enhanced the hardness and tensile strength of the extrudates.
AUSTRALIAN JOURNAL OF MECHANICAL ENGINEERING
(2023)
Article
Polymer Science
Alaa M. Abd-Elnaiem, A. Hakamy, Ibrahem A. Ibrahem, Atif M. Ali, Walied A. A. Mohamed, E. F. Abo Zeid
Summary: This study synthesized NiO nanoparticles using the chemical precipitation method and investigated the effects of calcination process on their structural properties, optical characteristics, and photocatalytic performance. The results showed that the optimal NiO sample had the smallest crystallite size and the highest surface area, exhibiting superior degradation efficiency for dye degradation.
JOURNAL OF INORGANIC AND ORGANOMETALLIC POLYMERS AND MATERIALS
(2022)
Article
Polymer Science
Alaa M. Abd-Elnaiem, Osamah S. Salman, A. Hakamy, Seenaa Hussein
Summary: In this study, polymer hybrids consisting of epoxy resin, acrylic polymer coating, and nanoclay were synthesized using the casting procedure. The thickness of the samples was varied from 1 to 3 mm. The influence of sample thickness on thermal stability, thermal conductivity, mechanical properties, and contact angle was investigated. Structural analysis showed that the loaded nanoclay formed crystalline structures with an average size of 56 nm within the amorphous polymer matrix. The nanoclay was uniformly dispersed throughout the epoxy matrix, indicating a lack of agglomeration. The maximum thermal stability was observed in samples with a thickness of 2 mm, and a contact angle close to 90 degrees was achieved with a thickness of 1.5 mm. Hardness values remained constant regardless of sample thickness. Increasing the thickness slightly improved impact and flexural strength values, while the wear rate increased slightly with applied force. As the thickness of the synthesized polymer hybrids increased from 1 to 3 mm, the thermal conductivity decreased from 0.47 to 0.32 W/m K. The synthesized polymer hybrids exhibited significant thermal and mechanical stability, as well as hydrophobicity, making them suitable for floor painting and waterproofing applications.
JOURNAL OF INORGANIC AND ORGANOMETALLIC POLYMERS AND MATERIALS
(2022)
Article
Chemistry, Physical
Abdelazim M. Mebed, Hasnain Mehdi Jafri, A. Hakamy, Alaa M. Abd-Elnaiem, Muhammad Sulaman, Sayed Elshahat
Summary: This work proposes a design pipeline to screen efficient polymer donors for organic solar cells, using machine learning models to predict power conversion efficiency. Molecular dynamics simulations and density functional theory analysis are employed to study the top three candidates. The pipeline has the ability to design and screen polymer donors and predict their efficiency with minimal computational cost.
INTERNATIONAL JOURNAL OF QUANTUM CHEMISTRY
(2022)
Article
Polymer Science
Tabarak M. Abbas, Seenaa Hussein
Summary: By incorporating carbon-based nanofillers into the polymer, the polymeric coating can be enlarged for various applications, enhancing mechanical properties and hydrophobicity.
JOURNAL OF INORGANIC AND ORGANOMETALLIC POLYMERS AND MATERIALS
(2022)
Article
Chemistry, Physical
Mohamed Rashad, Saloua Helali, Shams Issa, Saleh Al-Ghamdi, Marwah Alsharif, Ahmed Obaid Alzahrani, Mohamed Sobhi, Antoaneta Ene, Alaa M. Abd-Elnaiem
Summary: Zinc sulfide (ZnS) nanoparticles were synthesized using the chemical precipitation method. The structural parameters of the ZnS were investigated using X-ray diffraction, Raman spectroscopy, and scanning electron microscopy. The synthesized ZnS nanoparticles showed promising adsorption efficiency for Congo red (CR) dye, and the intraparticle diffusion kinetic model was found to be the best fit among the tested models.
Article
Engineering, Electrical & Electronic
Alaa M. Abd-Elnaiem, A. Hakamy
Summary: The influences of annealing temperature on the properties of indium-doped tin oxide (ITO) thin films were investigated. The results showed that thermal annealing improved the crystallinity, transparency, and electrical conductivity of the films, leading to an enhancement in the optical bandgap. This makes ITO a preferred material for optoelectronic devices and solar cells.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Polymer Science
Alaa M. Abd-Elnaiem, Seenaa Hussein, Nadia A. Ali, Ahmad Hakamy, Abdelazim M. Mebed
Summary: Acrylic polymer/cement nanocomposites have been developed for coating floors and swimming pools. The study shows that the filling of cement has a significant effect on the mechanical parameters, thermal stability, and wettability of acrylic polymer. The best impact strength and hardness are observed at cement ratios of 2 wt% and 4 wt%, respectively. Changing the filling ratio greatly affects the strain of the nanocomposites. The contact angle increases with the concentration of additives and cement, indicating excellent waterproofing properties of the synthesized coating.
Article
Engineering, Multidisciplinary
Temitayo M. Azeez, Lateef O. Mudashiru, Tesleem B. Asafa, Saheed Akande, Omolayo M. Ikumapayi, Joseph F. Kayode, Ikenna D. Uchegbu, Sunday A. Afolalu
Summary: The influence of temperature and die angle on the mechanical properties and flow stress behavior of Al 6063 processed by Equal Channel Angular Extrusion (ECAE) method was investigated. The experimental results showed that temperature had a greater effect on the tensile strength and hardness of the aluminum, while also resulting in finer grains. The simulation findings indicated that higher temperature led to a decrease in flow stress of the aluminum.
ADVANCES IN SCIENCE AND TECHNOLOGY-RESEARCH JOURNAL
(2023)
Article
Energy & Fuels
Alaa M. Abd-Elnaiem, Zain Elabdeen A. Mohamed, Sayed Elshahat, Mohamed Almokhtar, Malgorzata Norek
Summary: Photonics crystals based on porous anodic materials have shown great potential and versatility in various technological applications. Their low production costs make them more accessible and suitable for industrial manufacturing. This review provides an overview of the progress in fabricating photonic crystals using anodized aluminum, silicon, and titanium surfaces, and discusses their optical characteristics and applications. The review also highlights the influence of anodizing conditions on the pore geometry and presents an assessment of upcoming developments in photonic crystal manufacturing.
Article
Materials Science, Multidisciplinary
A. Sedky, A. Hakamy, Naser Afify, Soukaina Bouhmaidi, Larbi Setti, D. Hamad, Alaa M. Abd-Elnaiem
Summary: The structural parameters, photoluminescence, and magnetic characteristics of MxSn1-xOy nanocomposites synthesized by the hydrothermal method were studied. The doping of different metals in SnO2 affected the crystallite size, porosity, residual stress, and particle morphologies of the nanocomposites. The PL intensity and magnetic behaviors were also influenced by the doping.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2023)
Article
Materials Science, Ceramics
Gh. Abbady, A. Hakamy, Alaa M. Abd-Elnaiem
Summary: In this study, Sn1-xZn2xCr2O5 nanocomposites were prepared by the hydrothermal method, and their structure, properties, and adsorption performance were investigated. The results showed that the crystal structure and magnetic properties were dependent on the elemental composition, and the nanocomposites exhibited excellent adsorption performance towards MB dye.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Alaa M. Abd-Elnaiem, Mohamed Almokhtar, Zain Elabdeen A. Mohamed
Summary: A nanopowder of porous molybdenum (Mo) oxides with different polymorphs was prepared by anodizing the Mo sheet in an ethylene glycol solution containing fluoride at different voltages. The synthesized Mo oxides showed structural and morphological changes depending on the anodization voltage. The anodized Mo exhibited excellent performance as a catalyst for the photodegradation of methylene blue (MB).
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
M. Rashad, Alaa M. Abd-Elnaiem, T. A. Hanafy, N. M. Shaalan, A. M. A. Shamekh
Summary: This article aimed to develop eco-friendly organic PVA/Al2O3 nanocomposite membranes and evaluate the impact of different levels (1, 2, and 3 wt%) of alumina (Al2O3) nano-filler on their structural and optical properties for photonic applications. The dispersion of Al2O3 nano-filler in PVA matrix was achieved through solvent casting technique. The synthesized PVA/Al2O3 nanocomposite membranes were characterized using FTIR, Raman spectroscopy, and XRD. It was found that the introduction of Al2O3 nano-filler weakened the hydrogen bonding between PVA chains and generated hydrogen bonding with Al2O3, leading to the folding of PVA polymer chains and the formation of new structural defects and impurities, which can be utilized for optoelectronic applications and environmental treatments.
Article
Physics, Multidisciplinary
A. Sedky, Naser Afify, A. Hakamy, Alaa M. Abd-Elnaiem
Summary: The structural and optical properties, as well as dielectric characteristics, of hydrothermally synthesized SnO2 nanoparticles, Cu/SnO2, and Fe/SnO2 composites were investigated. The results showed that the composition, temperature, and frequency have a significant impact on the electrical and optical properties of these materials. The synthesized composites exhibit potential applications in water purification, catalysis, batteries, and solar cells.