Article
Polymer Science
Sangita Tripathy, Bhanu Pratap Singh, Sanair Massafra de Oliveira, Alexei Kuznetsov, Joyce Rodrigues de Araujo, Sam Gnaniah, S. R. Dhakate
Summary: In this study, uniformly dispersed graphene oxide/polyamide-6 nanocomposites were prepared using a double extrusion and injection molding method. Tensile measurements and DSC analysis showed that the addition of graphene oxide significantly improved the mechanical and thermal performance of the composites.
POLYMERS FOR ADVANCED TECHNOLOGIES
(2023)
Article
Engineering, Chemical
Esmail Sharifzadeh, Mahshad Karami, Fiona Ader
Summary: In this study, the effects of nanoparticle aggregates and agglomerates on the mechanical properties of polymer nanocomposites were comprehensively investigated. A specific strategy based on the equilibrium between dispersion and cohesion energies was proposed to define the content and size of aggregates/agglomerates. Aggregated/agglomerated networks with co-continuous morphology were considered in constrained volumes (CVs). An equivalent box model (EBM) was used to predict the tensile modulus of the nanocomposites. The model was validated using experimental results of HDPE nanocomposite samples and compared with data from the literature.
POLYMER ENGINEERING AND SCIENCE
(2023)
Article
Chemistry, Physical
Chao Ding, Peng Yu
Summary: The morphology, mechanical properties, and thermal properties of Al-20Si alloy are influenced by the extruding temperature. The alloy extruded at 350 degrees has fine eutectic Si, which provides high strength but is not stable at high temperatures. In contrast, the alloy extruded at 550 degrees exhibits primary Si phase, which is large in size and more stable. Moreover, it also has in situ formed amorphous/delta* Al2O3, further reducing the coefficient of thermal expansion (CTE).
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Composites
Srinivasan Shanmugam, Omkumar Meenakshisundaram
Summary: This study focuses on the preparation and fabrication of graphene hybrid fiber-reinforced polymer composites and investigates the effect of graphene on the microhardness and wear behavior of the composites. The addition of graphene significantly improves the thermal stability, microhardness, and tribological performance of the composites. Surface features were examined using a scanning electron microscope, and the results show that the inclusion of 0.6 wt% graphene decreases the friction coefficient by 35% and reduces the wear rate under abrasive conditions. The use of graphene in wear-resistant materials and high-performance applications in automotive and aerospace industries shows promising potential.
POLYMER COMPOSITES
(2023)
Article
Chemistry, Multidisciplinary
An Truong Thanh, Cuong Huynh Le Huy
Summary: This study investigates the effects of zinc borate (ZB) and nano silica (NS) on the mechanical and thermal properties of epoxy nanocomposites and coatings. The addition of 5 wt % ZB to the epoxy resin resulted in a 50% increase in impact strength and an increase in glass transition temperature (Tg) from 52 to 71 degrees C. The combination of 5 wt % ZB and 1 wt % NS further enhanced the impact strength of the nanocomposites by 137.5% and increased Tg to 82 degrees C. The results demonstrate that ZB, NS, and hardener T31 improve the toughness and mechanical properties of epoxy materials.
Article
Materials Science, Multidisciplinary
Subhankar Das, Sudipta Halder, Bappi Paul, Nazrul Islam Khan, M. S. Goyat
Summary: Graphene oxide (GO) or reduced graphene oxides (RGO) have shown great potential as reinforcements in epoxy composites for enhancing their mechanical and thermal properties. However, the preparation of GO and RGO is challenging. This study proposes the use of milled graphite nanoparticles (GrNPs) as an alternative reinforcement due to their porous structure and ease of oxidation. The use of economical silanized milled GrNPs significantly improves the thermo-mechanical behavior of the epoxy nanocomposites without sacrificing other important properties.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Materials Science, Composites
Eyob Wondu, Zelalem Chernet Lule, Jooheon Kim
Summary: In this study, a composite material with high-charge-storing properties was fabricated by using TPU as the matrix and SrTiO3 particles as a filler. The surface of SrTiO3 particles was functionalized with IPDI to improve the compatibility between the matrix and filler. The resulting composite material exhibited high-dielectric constant, high-thermal stability, and good mechanical properties.
POLYMER COMPOSITES
(2023)
Article
Polymer Science
Carmen K. Abuoudah, Yaser E. Greish, Basim Abu-Jdayil, Ehab M. El-said, Muhammad Z. Iqbal
Summary: Graphene has a significant impact on the functional properties of polymers, with the use of compatibilizers being crucial for enhancing the performance of nanocomposites. The study found that EBA showed better dispersion efficacy and thermal stability for G/PP nanocomposites compared to MA-PP.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Materials Science, Composites
Mohammad Razavi-Nouri, Masoud Salavati
Summary: The influence of multi-walled carbon nanotubes (MWCNTs) on the thermal, mechanical, wetting properties, and rheological behavior of poly(ethylene-co-vinyl acetate) (EVA)/acrylonitrile-butadiene rubber nanocomposites was investigated. It was found that the addition of MWCNTs improved the solid surface free energy, work of adhesion, spreading coefficient, and Girifalco-Good's interaction parameter, while reducing the contact angle and interfacial free energy. The nanocomposite with 1 wt% nanofillers exhibited the highest tensile strength and toughness. Furthermore, the relaxation ratio and relaxation rate index decreased with increasing carbon nanotubes (CNTs) concentration. The increment in MWCNTs loading led to an increase in the yield stress of the molten materials according to a quadratic equation. The analysis also showed that the crystallization process was triggered at a slightly higher temperature with the introduction of CNTs, while the melting point and nucleation rate decreased noticeably with the increase in nanofillers content.
POLYMER COMPOSITES
(2022)
Article
Polymer Science
Dalia E. Abulyazied, Antoaneta Ene
Summary: This review focuses on nanoclay-reinforced polymers, discussing the structure of layered silicate clay, methods for clay material modification, general characterization techniques, synthesis methods, properties of polymer-clay nanocomposites (PCNs), and specific applications in various industries. Examples from scientific literature are provided to illustrate the discussion. The primary goal is to provide an up-to-date survey of polymer-clay nanocomposites and their specific applications.
Article
Nanoscience & Nanotechnology
Fei Lin, Fanghui Jia, Mengyuan Ren, Jun Wang, Ming Yang, Zhixin Chen, Zhengyi Jiang
Summary: An Al2024/1 wt% TiC/1 wt% GNPs nanocomposite with improved mechanical properties and stable thermal conductivity was fabricated through powder metallurgy.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Composites
Onur Aykanat, Mahmut Ali Ermeydan
Summary: Environmental concerns in the disposal of waste from automotive, building, and packaging applications have led researchers to seek alternative green materials. Hybrid biocomposites, made of natural/man-made fibers and biopolymers, offer a potential alternative to glass fiber-supported composites. However, little is known about the insulation properties of biocomposites in heat and sound. This study examines basalt/beech wood fiber reinforced polylactic acid (PLA) biocomposites and their insulation, mechanical, and physical properties.
POLYMER COMPOSITES
(2022)
Article
Materials Science, Composites
Joon Fatt Wong, Jia Xin Chan, Azman Hassan, Zurina Mohamad, Shahrir Hashim, Jeefferie Abd Razak, Yern Chee Ching, Muhamad Zaini Yunos, Ridwan Yahaya, T. M. Sampath U. Gunathilake
Summary: Polyoxymethylene (POM) nanocomposites reinforced with synthetic wollastonite nanofibers (SWN) showed improved mechanical, thermal, and flammability properties as the aspect ratio of SWN increased. Higher aspect ratio SWN resulted in increased tensile strength, Young's modulus, and impact strength in POM nanocomposites. However, lower aspect ratio SWN performed better in flame retardancy, with delayed time to ignition and decreased peak heat release rate.
POLYMER COMPOSITES
(2023)
Article
Engineering, Chemical
Angel Romo-Uribe, Joseph D. Lichtenhan
Summary: This study demonstrates that dispersing parts-per-million polyhedral oligomeric silsesquioxane (POSS) nanochemicals by melt extrusion with polyolefins can improve the tensile Young's modulus, yield stress, and toughness of films without affecting extensibility. The spatial distribution of POSS and the size of nanoparticles play a key role in enhancing the mechanical properties of polymers.
POLYMER ENGINEERING AND SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Bakhan S. Mustafa, Gelas M. Jamal, Omed Gh. Abdullah
Summary: Hybrid polymer nanocomposites were fabricated by incorporating zirconium dioxide and yttrium oxide nanoparticles into epoxy resin and strengthening it with multi-walled carbon nanotubes. The addition of a small amount of MWCNT improved the mechanical and thermal properties of the hybrid nanocomposites. The nanocomposites also showed enhanced structural properties and thermal stability. Overall, this material is a suitable candidate for structural and sub-structural construction.
RESULTS IN PHYSICS
(2022)
Article
Pharmacology & Pharmacy
Anna Czerniecka-Kubicka, Piotr Tutka, Marek Pyda, Malgorzata Walczak, Lukasz Uram, Maria Misiorek, Ewelina Chmiel, Stanislaw Wolowiec
Article
Entomology
Michal Milek, Agata Drogon, Marek Pyda, Anna Czerniecka-Kubicka, Monika Tomczyk, Malgorzata Dzugan
JOURNAL OF APICULTURAL RESEARCH
(2020)
Article
Chemistry, Applied
Iwona Zarzyka, Tomasz Paczesniak, Wieslaw Fracz
Summary: The research focuses on modifying the properties of rigid polyurethane foams using new polyols containing oxamide and borate groups. These modifications result in foams with low water uptake, excellent heat-insulating properties, good dimension stability, reduced flammability, while not compromising mechanical properties and thermal stability.
JOURNAL OF CELLULAR PLASTICS
(2021)
Article
Materials Science, Coatings & Films
M. Winnicki, L. Latka, M. Jasiorski, A. Baszczuk
Summary: This article focuses on the mechanical tests of TiO2 coatings obtained by the Cold Spray method, showing that an amorphous coating has the highest adhesion with a critical load of 15.8 +/- 1.3 N when deposited onto aluminum and steel substrates. Different types of research were performed to analyze the mechanical properties of the coatings, such as scratch test, nanoindentation, coatings microhardness, and SEM analysis.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Materials Science, Coatings & Films
M. Winnicki, A. Gibas, A. Baszczuk, M. Jasiorski
Summary: The study investigated the deposition mechanism of self-synthesized titanium dioxide powders on ABS polymer by low-pressure cold spraying. It was found that using soft amorphous titanium dioxide agglomerates can reduce erosion of the substrate and provide a satisfactory coating. Additionally, the results showed that the highest deposition efficiency was achieved by using a lower working gas temperature in all types of used powders.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Thermodynamics
Anna Czerniecka-Kubicka, Grzegorz Janowski, Marek Pyda, Wieslaw Fracz
Summary: In this study, biocompatible composites modified by hemp fibers were prepared using poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV). The addition of hemp fibers led to a significant increase in crystallinity and a decrease in heat capacity for fully amorphous material in the obtained biocomposites, as observed through scanning electron microscope and computed tomography analysis. Additionally, mechanical properties of the investigated materials were measured and presented.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Chemistry, Multidisciplinary
Elzbieta Kociolek-Balawejder, Ewa Stanislawska, Irena Jacukowicz-Sobala, Marek Jasiorski
Summary: The synthesis of copper compounds with polymeric adsorbents showed that Cu2O and CuO significantly reduced the porosity of the obtained composites. Samples dried thermally lost porosity and increased bulk density, while freeze-dried samples retained typical macroporous characteristics. This reduction in porosity was mainly caused by the surface morphology and agglomeration tendency of Cu2O and CuO particles.
JOURNAL OF NANOPARTICLE RESEARCH
(2021)
Article
Polymer Science
Wieslaw Fracz, Grzegorz Janowski, Lukasz Bak
Summary: This study evaluated the impact of alkali treatment of hemp and flax fibers on the properties of biocomposites based on PHBV biopolymer. Results showed that increasing alkali solution concentration improved most properties of biocomposites filled with hemp fibers, while the mechanical properties decreased significantly for composites containing flax fibers etched by 10% NaOH solution. Transformations in fiber geometry were confirmed by microscopic analysis, leading to the conclusion that fiber alkalization method should be chosen individually to enhance specific properties of biocomposites.
Article
Polymer Science
Wieslaw Fracz, Grzegorz Janowski, Maciej Pruchniak, Lukasz Walek
Summary: The study utilized computed tomography to analyze the PHBV-hemp fiber biocomposites at different injection rates, showing differences in fiber distribution and porosity. Samples produced at high injection rates had fewer fibers and pores, highlighting the potential of CT scanning to assess the structure of molded parts.
Article
Engineering, Multidisciplinary
Grzegorz Janowski, Wieslaw Fracz, Lukasz Bak
Summary: A modern biocomposite based on PHBV matrix with hemp fibers was produced using extrusion process, reducing production costs and improving mechanical properties. Optimization of injection molding process was conducted using orthogonal planes, resulting in reduced processing shrinkage and enhanced product performance. Taguchi method was employed for significant improvement of mechanical properties and effective reduction of shrinkage.
ADVANCES IN SCIENCE AND TECHNOLOGY-RESEARCH JOURNAL
(2021)
Article
Materials Science, Multidisciplinary
Anna Gibas, Agnieszka Baszczuk, Marek Jasiorski, Marcin Winnicki, Daniel Ocinski
Summary: This study presents a facile approach to deposit coatings using low-pressure cold spray technique from amorphous titanium dioxide. By introducing defects and active groups, the activity of the coatings can be preserved, leading to effective photocatalytic degradation under visible light.
Article
Chemistry, Multidisciplinary
Anita Bialkowska, Beata Krzykowska, Iwona Zarzyka, Mohamed Bakar, Vladimir Sedlarik, Miroslava Kovarova, Anna Czerniecka-Kubicka
Summary: This paper presents an attempt to improve the properties of poly(3-hydroxybutyrate) (P3HB) by adding linear aliphatic polyurethane (PU400) and organomodified montmorillonite (MMT)-(Cloisite((R))30B). The hybrid nanobiocomposites were analyzed for their nanostructure, morphology, mechanical properties, and thermal properties. The addition of Cloisite((R))30B and aliphatic polyurethane to the P3HB matrix resulted in a decrease in the degree of crystallinity, an increase in the amorphous phase contents, and improved thermal stability. The best mechanical properties were observed in hybrid nanobiocomposites containing 10 wt.% of aliphatic polyurethane and 1 wt.% of Cloisite((R))30B.
Article
Pharmacology & Pharmacy
Anna Czerniecka-Kubicka, Piotr Tutka, Iwona Zarzyka, Grace Neilsen, Brian F. Woodfield, Marcin Skotnicki, Marek Pyda
Summary: The characterization of cytisine and its blends with poly(lactic acid) was performed using thermal analysis, elemental analysis, infrared spectroscopy, and powder X-ray diffractometry. The low-temperature heat capacity and solid-state heat capacity of cytisine were studied, and the reference baselines for advanced thermal analysis were established based on the calculated heat capacity in the solid and liquid states. The presence of a solid-solid transition and a polymorphism phenomenon of cytisine were confirmed by DSC and X-ray analysis.
EUROPEAN JOURNAL OF PHARMACEUTICAL SCIENCES
(2023)
Article
Chemistry, Physical
Iwona Zarzyka, Anna Czerniecka-Kubicka, Agnieszka Szyszkowska, Michal Longosz, Lucjan Dobrowolski, Weronika Gonciarz, Magdalena Chmiela, Damian Trzybinski, Agata Wrobel, Krzysztof Wozniak, Karol Heclik
Summary: 3-Chloro-3-phenylquinoline-2,4-dione (2) is an intermediate product in the synthesis of biologically active quinolines or quinazolines. The crystal structure of compound 2 was investigated and its cytotoxic activity against L929 and AGS cells was tested. Molecular modeling showed stable enantiomer pairs and compounds 2 and 4 exhibited high cytotoxic activity. Their potential as anti-neoplastic substances cannot be excluded when delivered directly to neoplastic cells.
JOURNAL OF MOLECULAR STRUCTURE
(2023)
