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Search results for: POLYETHYLENE-BASED COMPOSITES
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Tailoring diamondised nanocarbon-loaded poly(lactic acid) composites for highly electroactive surfaces: extrusion and characterisation of filaments for improved 3D-printed surfaces
PublicationA new 3D-printable composite has been developed dedicated to electroanalytical applications. Two types of diamondised nanocarbons - detonation nanodiamonds (DNDs) and boron-doped carbon nanowalls (BCNWs) - were added as fillers in poly(lactic acid) (PLA)-based composites to extrude 3D filaments. Carbon black served as a primary filler to reach high composite conductivity at low diamondised nanocarbon concentrations (0.01 to 0.2...
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Characterization of structure and properties of polymer films made from blends of polyethylene with poly(4-methyl-1-pentene)
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Striking Influence about HZSM-5 Content and Nickel Catalyst on Catalytic Carbonization of Polypropylene and Polyethylene into Carbon Nanomaterials
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Correction: Simultaneously improving the thermal stability, flame retardancy and mechanical properties of polyethylene by the combination of graphene with carbon black
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Combination of fumed silica with carbon black for simultaneously improving the thermal stability, flame retardancy and mechanical properties of polyethylene
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All-natural bio-plastics using starch-betaglucan composites
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The effect of mercerized sisal fibres on natural rubber composites' properties
PublicationW pracy omówiono wyniki badań fizyko-mechanicznych kompozytów otrzymanych z mieszanek zawierających kauczuk naturalny oraz statystycznie zdyspergowane krótkie włókno sisalowe. Włókno naturalne przed użyciem poddano merceryzacji.Otrzymane wulkanizaty poddano badaniom wytrzymałościowym w warunkach statycznych w celu określenia wpływu parametrów wulkanizacji i ilości dodanego włókna na właściwości otrzymanych produktów. Stwierdzono...
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Conducting composites as cable anodes in cathodic protection: a literature summary
PublicationPrzedstawiono podstawową charakterystykę systemu ochrony katodowej z wykorzystaniem anod kablowych. Anody kablowe różnią się od klasycznych systemów anodowych sposobem instalacji anod. System anodowy oparty na anodach kablowych nie jest instalowany punktowo; anoda umieszczana jest w niewielkiej odległości od chronionej konstrukcji i biegnie wzdłuż trasy konstrukcji. Materiałem anodowym proponowanego rozwiązania jest elastyczny...
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Processing and properties of Al-Si-Fe-Cr in situ composites
PublicationPraca jest kontynuacją badań nad wytwarzaniem tanich kompozytów in situ o osnowie stopu Al-Si wzmocnionego związkami międzymetalicznymi Al-Fe-Si lub Al-Fe-Cr-Si, otrzymanych poprzez reakcję ciekłego stopu Al (Al-Si11, Al-Si25) z proszkiem Fe lub Cr. Żelazo zostało wybrane ze względu na niską cenę, niską temperaturę wytwarzania, wysoką reaktywność z Al i heksagonalną sieć krystalograficzną związku Al-Fe-Si, co sprzyja tworzeniu...
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Conductivity of two-dimensional composites with randomly distributed elliptical inclusions
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The Influence of Nano-Fe3O4 on the Microstructure and Mechanical Properties of Cementitious Composites
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The Effect of Nanosilica on the Mechanical Properties of polymer-Cement Composites (PCC)
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Reduced graphene oxide and inorganic nanoparticles composites – synthesis and characterization
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Multifunctional cement composites with expanded graphite for temperature monitoring of buildings
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Mater-Bi/Brewers’ Spent Grain Biocomposites—Novel Approach to Plant-Based Waste Filler Treatment by Highly Efficient Thermomechanical and Chemical Methods
PublicationThermoplastic starch (TPS) is a homogenous material prepared from native starch and water or other plasticizers subjected to mixing at a temperature exceeding starch gelatinization temperature. It shows major drawbacks like high moisture sensitivity, poor mechanical properties, and thermal stability. To overcome these drawbacks without significant cost increase, TPS could be blended with bio-based or biodegradable polymers and...
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Nano-engineered diamond-based materials for supercapacitor electrodes: A review
PublicationOwing to the popularity of carbon-based supercapacitors, diamond has also been examined as a potential candidate with unique advantages such as a wide electrochemical potential window and stable capacitive behavior in both aqueous and non-aqueous electrolytes. Moreover, its chemical stability in harsh environments at extreme applied potential and current provides rare opportunities for designing new supercapacitors. Owing to the...
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Softwood-lignin/natural rubber composites containing novel plasticizing agent: Preparation and characterization
PublicationComposite materials based on natural rubber were obtained by using glycerolysate (decomposition prod- uct of polyurethane) as a novel plasticizer. In order to determine the effect of various lignin content, four different filler amounts were used, namely, 5 phr (parts per 100 parts of natural rubber) of lignin (WLI5G), 10 phr (WLI10G), 20 phr (WLI20G), and 40 phr (WLI40G). The reference specimen without lignin (WLI0G) was also...
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Expanded graphite assistant construction of gradient-structured char layer in PBS/Mg(OH)2 composites for improving flame retardancy, thermal stability and mechanical properties
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Recent Advances in Accelerated Multi-Objective Design of High-Frequency Structures using Knowledge-Based Constrained Modeling Approach
PublicationDesign automation, including reliable optimization of engineering systems, is of paramount importance for both academia and industry. This includes the design of high-frequency structures (antennas, microwave circuits, integrated photonic components), where the appropriate adjustment of geometry and material parameters is crucial to meet stringent performance requirements dictated by practical applications. Realistic design has...
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Catalytic conversion of linear low density polyethylene into carbon nanomaterials under the combined catalysis of Ni2O3 and poly(vinyl chloride)
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Co-etching effect to convert waste polyethylene terephthalate into hierarchical porous carbon toward excellent capacitive energy storage
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Polyethylene Terephthalate Wastes as a Partial Replacement for Fine Aggregates in Concrete Mix, Case of Jimma Town, South West Ethiopia
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FTIR Study and Mechanical Properties of Cellulose Fiber-Reinforced Thermoplastic Composites
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Silica xerogel–hydrogen peroxide composites: Their morphology, stability, and antimicrobial activity
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Design of dimensionally stable composites using efficient global optimization method
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A systematic experimental study on biochar-cementitious composites: Towards carbon sequestration
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Environmental stress cracking in e-glass and aramid/glass epoxy composites
PublicationKompozyty epoksydowe wzmocnione włóknami szklanymi są dość odporne na wpływy środowiskowe w stanie nieobciążonym, jednak po przyłożeniu obciążeń łatwo pękają w środowisku wody i rozcieńczonych kwasów. Charakterystyki propagacji pęknięć środowiskowych w laminatach szklano/epoksydowych były przedmiotem szeregu prac, jednak brak jest danych na temat zachowania laminatów o wzmocnieniu hybrydowym aramidowo-szklanym stosowanych w budowie...
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Quasi-Static and Dynamic Testing of Carbon Fiber Reinforced Magnesium Composites
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Fabrication, microstructure and properties of Al-Si -Fe-Cu in situ composites.
PublicationW poszukiwaniu tanich kompozytów na bazie stopów Al powstała koncepcja otrzymywania kompozytów in situ o osnowie stopu Al-Si w reakcji ciekłego stopu Al-Si (Al-Si11, Al-Si25) z proszkiem Fe. Powstałe wydzielenia np. iglastego AlFe4Si w stopie AlSi25 o niezbyt wysokiej twardości (rys.2) stanowią skuteczne wzmocnienie stopu pod względem twardości, sztywności i wytrzymałości na ściskanie jak też obniżonej ścieralności. Jednak znaczny...
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Self-lubricating epoxide composites Kompozyty epoksydowe o właściwościach samosmarujących
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PROPERTIES OF FIBER REINFORCED CEMENT COMPOSITES WITH CENOSPHERES FROM COAL ASH
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Infiltration - an alternative method to prepare composites for Solid Oxide Fuel Cells
PublicationPrzedstawiono różne techniki nasączania pozwalające na uzyskanie materiałów o mieszanym przewodnictwie jonowo-elektronowym do zastosowań w tlenkowych ogniwach paliwowych
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Polyurethane-wood composites (PU-WC) as a method of wood waste management
PublicationIn recent years, due to the progressive environmental degradation and increase of environmental awareness, the sustainability of production systems in wood processing, the wood industry, and wood waste management is a crucial issue for European industry and society. Consequently, the problem of generating wood-like waste and the associated risks has become an increasingly noticeable challenge for science. Although various methods...
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Composite Materials Based on Polymer-Derived SiCN Ceramic and Disordered Hard Carbons as Anodes for Lithium-Ion Batteries
PublicationNew composite materials based on polymer-derived SiCN ceramics and hard carbons were studied in view of its application as anodes for lithium-ion batteries. Two kinds of composites were prepared by pyrolysis of the preceramic polysilazane (HTT1800, Clariant) at 1000 °C in Ar atmosphere mixed with hard carbons derived from potato starch (HC_PS) or with a hard carbon precursor, namely potato starch (PS), denoted as HTT/HC_PS and...
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Recent progress in ultra-low formaldehyde emitting adhesive systems and formaldehyde scavengers in wood-based panels: a review
PublicationTraditional wood-based panels are produced with synthetic, formaldehyde-based adhesives, commonly made from fossil-derived constituents, such as urea, phenol, melamine, etc. Along with their numerous advantages, such as chemical versatility, high reactivity and excellent adhesive performance, these adhesives are characterized by certain problems, connected with the hazardous volatile organic compounds (VOCs), mostly free formaldehyde...
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Surface modification of PMMA polymer and its composites with PC61BM fullerene derivative using an atmospheric pressure microwave argon plasma sheet
PublicationThis paper presents the results of experimental investigations of the plasma surface modification of a poly(methyl methacrylate) (PMMA) polymer and PMMA composites with a [6,6]-phenyl-C61-butyric acid methyl ester fullerene derivative (PC61BM). An atmospheric pressure microwave (2.45 GHz) argon plasma sheet was used. The experimental parameters were: an argon (Ar) flow rate (up to 20 NL/min), microwave power (up to 530 W), number...
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Giant Reed (Arundo donax L.) Fiber Extraction and Characterization for Its Use in Polymer Composites
PublicationThis work describes an extraction method for giant reed fibers from stems and leaves based on chemical soaking and crushing through a rolling mill. Obtained fibers, together with the shredded plant (stems + leaves), are characterized in terms of chemical composition, thermal stability, morphology, and crystallinity. Mechanical properties of fibers have also been assessed (single fiber tensile tests). The results show that the proposed...
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Novel Structures and Applications of Graphene-Based Semiconductor Photocatalysts: Faceted Particles, Photonic Crystals, Antimicrobial and Magnetic Properties
PublicationGraphene, graphene oxide, reduced graphene oxide and their composites with various compounds/materials have high potential for substantial impact as cheap photocatalysts, which is essential to meet the demands of global activity, offering the advantage of utilizing “green” solar energy. Accordingly, graphene-based materials might help to reduce reliance on fossil fuel supplies and facile remediation routes to achieve clean environment...
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Study on the flammability, thermal stability and diffusivity of polyethylene nanocomposites containing few layered tungsten disulfide (WS2) functionalized with metal oxides
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Bio-Based Polyurethane Networks Derived from Liquefied Sawdust
PublicationThe utilization of forestry waste resources in the production of polyurethane resins is a promising green alternative to the use of unsustainable resources. Liquefaction of wood-based biomass gives polyols with properties depending on the reagents used. In this article, the liquefaction of forestry wastes, including sawdust, in solvents such as glycerol and polyethylene glycol was investigated. The liquefaction process was carried...
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A novel version of simulated annealing based on linguistic patterns for solving facility layout problems
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Electrode materials for electrochemical capacitors based on poly(3,4-ethylenedioxythiophene) and functionalized multi-walled carbon nanotubes characterized in aqueous and aprotic electrolytes
PublicationWithin this work, we report a facile one-stage synthesis of nanocomposites based on functionalized carbon nanotubes (CNTs) and electroactive polymer poly(3,4-ethylenedioxythiophene). Three different composites are investigated as potential electrode materials for the electrochemical capacitors. Two of the composites contain carbon nanotubes (ox-CNTs), functionalized by acid oxidation process (65% HNO3, 120 °C). The third composite...
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Effect of Porosity on the Thermo-Mechanical Behavior of Friction-Stir-Welded Spark-Plasma-Sintered Aluminum Matrix Composites with Bimodal Micro- and Nano-Sized Reinforcing Al2O3 Particles
PublicationThe thermo-mechanical behavior of nanosized Al2O3 particles reinforcing aluminum was analyzed in the present paper. The material was prepared by spark plasma sintering and friction stir welding. The thermal stresses affecting the composite behavior during welding were modeled through COMSOL MultiPhysics, and the results were validated by the analyses of the composites’ mechanical properties. The spark-plasma-sintered materials...
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Kompozyty poliuretanowo-gumowe wulkanizowane siarką = Polyurethane-rubber composites vulcanization of sulphur
PublicationW artykule przedsawiono wyniki badań statycznych i dynamicznych właściwości mechanicznych oraz analizę mikroskopową nowych kompozytowych materiałów poliuretanowo-gumowych wulkanizowanych siarką otrzymanych z kauczuków uretanowych wulkanizowanych siarką i recyklatu gumowego w postaci granulatu o wielkości ziarna do 1 mm uzyskanego z poużytkowych opon samochodowych. Osnowy poluretanowe napełniano recyklatem w ilościach od 10 do 80%...
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Characterization of the Physical, Chemical, and Adsorption Properties of Coal-Fly-Ash–Hydroxyapatite Composites
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Manufacturing and investigation of physical properties of polyacrylonitrile nanofibre composites with SiO2, TiO2and Bi2O3nanoparticles
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Elastic-plastic properties of metal matrix composites: Validation of mean-field approaches
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Organic-inorganic composites consisted of poly(3,4-ethylenedioxythiophene)and Prussian Blue analogues
PublicationThe organic-inorganic material consisted of poly(3,4-ethylenedioxythiophene) (pEDOT) and copper hexacyanoferrate (Cuhcf) was synthesized. The pEDOT film with Fe(CN)63−/4− as counter-ions potentiodynamically polarized in aqueous CuCl2 electrolyte brings about stable hybrid material (pEDOT/Cuhcf) performing single redox activity of FeII/III at a formal potential Ef = 0.61 V (vs. Ag/AgCl/0.1 M KCl) and less clearly shaped two redox...
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Sliding Wear Performance of AlCrN Coating on TiB2/Ti Composites at High Temperatures
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Usefulness of Mercury Porosimetry to Assess the Porosity of Cement Composites with the Addition of Aerogel Particles
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