Industrial & Engineering Chemistry Research, Год журнала: 2025, Номер unknown
Опубликована: Март 18, 2025
Язык: Английский
Case Studies in Chemical and Environmental Engineering, Год журнала: 2024, Номер 9, С. 100673 - 100673
Опубликована: Фев. 23, 2024
It is difficult to reuse wastes from polymers due the mismatch between amount of contaminants and secondary quality feed. This type operation much more expensive cost-effective than production polymer raw materials latest materials. However, recyclable beneficial if used extensively in various concrete products wood-polymer boards. done only cleaning sorting are not particularly important for products. Polyethylene terephthalate (PET) a widely industries its excellent physical chemical properties. Besides, increasing use PET has led global crisis waste management, as improper disposal caused significant environmental damage. major source accumulated landfills, address this issue, recycling methods have evolved. In regard, present review examines techniques involved PET. Conventional influence diverse depolymerization reaction variables were discussed, upsides downsides each technique considered. The summarizes advances technologies plastic waste, focusing on bio-recycling PET, aiming sustainable, economical solutions circular economy.
Язык: Английский
Процитировано
105
Case Studies in Chemical and Environmental Engineering, Год журнала: 2024, Номер 9, С. 100626 - 100626
Опубликована: Янв. 24, 2024
Nanoparticles have revolutioned materials secience and manufacturing industry thanks to their ultrafine scale. Nano-scale titanium oxide (nano-TiO2) are key elements of a wide variety sectors advanced materials, devices, systems in view versatility extraordinary characetristics, mainly optical, electrical catalytic properties. Thnaks aforementioned features, they found position different industries such as colors pigments, photocatalysts, photovoltaic solar cells, adsorbents, cosmetics, electric electronic devices. Nano-SiO2 application gives rise range properties performance, which severely depends on particle size, size distribution, agglomeration the bulk host or systems. When used surface coating additive even functionalized, nano- TiO2 takes more roles, state-of-the-art depending synthesis method. Therefore, review synthesis, properties, surface- bulk-functionalization/modification (respectively with function groups doping) methods achieving high-performance seems essential. In this review, background information developments from pure Titanium Oxide chemically modified -based photocatalysts were discussed detail, Photocatalytic activity oxide-based nitrogen group pollutant decomposition. It also Vehicle for Chemotherapeutics Other Applications Medicine an overview factors affecting been reviewed.
Язык: Английский
Процитировано
80
Case Studies in Chemical and Environmental Engineering, Год журнала: 2024, Номер 9, С. 100612 - 100612
Опубликована: Янв. 11, 2024
Polylactic acid (PLA) is a linear aliphatic polyester thermoplastic made from renewable sources such as sugar beet and cornstarch. Methods of preparation polylactic are biological chemical. The advantages biocompatibility, easily processing, low energy loss, transparency, high strength, resistance to water fat penetration consumption carbon dioxide during production. However, has disadvantages hydrophobicity, fragility at room temperature, thermal resistance, slow degradation rate, permeability gases, lack active groups chemical neutrality. To overcome the limitations acid, stability inability absorb nanoparticles graphene added improve its properties. Samples were prepared by solution casting method using chloroform solvent in thin films. mechanical, thermal, structural properties pure acid/graphene nanocomposites studied tensile Test X-ray diffraction (XRD), Root mean square (RMS) Differential Scanning Calorimetry (DSC). Also, exposing samples Ultraviolet (UV) rays then performing test, produced against was investigated. With above tests, it found that adding crystallinity decreases strength elongation particles (0.4% graphene) increase certain extent decrease. loss modulus storage also increased addition nanoparticles. By comparing exposed with other samples, significant decrease elasticity observed. In words, make brittle.
Язык: Английский
Процитировано
31
Case Studies in Chemical and Environmental Engineering, Год журнала: 2023, Номер 8, С. 100527 - 100527
Опубликована: Окт. 15, 2023
In this study, fast gas adsorbent nanocomposites based on the carbon nanotubes (CNTs)/titanium dioxide (TiO2)/copper oxide (CuO)/Zeolite (CNTs/TiO2/CuO/Zeolite) and CNTs/TiO2 structures for nitrogen (NO2) removal have been investigated. The nanocomposite films were deposited glass substrate using push coating method. characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), Brunauer-Emmett-Teller (BET). BET test was carried out to study total surface diameter of pores within matrices nanocomposites. For nanocomposite, NO2 concentration (NGC) decreased from 102 ppm 41 ppm, CNTs/TiO2/CuO/Zeolite NGC 172 34 ppm. results revealed that efficiency adsorption capacity 80 % 138 mg g−1, respectively with reduction rate K = 0.37 min−1. additional exhibited is higher than CNTs/TiO2. This promising opens new insight investigating capability these materials pollutants industrial regions as environmentally friendly filters.
Язык: Английский
Процитировано
41
Heliyon, Год журнала: 2023, Номер 9(12), С. e22559 - e22559
Опубликована: Ноя. 23, 2023
Significant deformation of the metal structure can be achieved without breaking or cracking metal. There are several methods for plastics. The most important these angular channel pressing process, high-pressure torsion, multidirectional forging extrusion-cyclic compression cumulative climbing connection consecutive concreting and smoothing method, pipe torsion. nanocomposite is a multiphase material which size one its phases less than 100 nm in at least dimension. Due to some unique properties, metal-based nanocomposites widely used engineering applications such as automotive aerospace industries. Polymer-based two-phase systems with polymer-based reinforcing (usually ceramic). These materials have simpler synthesis process variety industry, gas pipelines, sensors. Severe plastic (SPD) known best method producing bulk ultrafine grained nanostructured excellent properties. Different were developed that suitable sheet solid materials. During past decade, efforts been made create effective processes cylindrical tubes. In this paper, we review intended tubes, their effects on properties severe briefly introduced common materials, sheets, pipes, well background nanocomposites, concisely microstructural mechanical discussed. paper will focus introduction tube processes, then comparison them based advantages disadvantages from viewpoints processing
Язык: Английский
Процитировано
35
Case Studies in Chemical and Environmental Engineering, Год журнала: 2023, Номер 8, С. 100535 - 100535
Опубликована: Окт. 27, 2023
Phenolic resins have excellent dimensional, thermal, chemical and corrosion resistance. Also, the volatile substances produced during thermal degradation of this resin low toxicity and, in addition, they high charring. been applied many areas such as internal parts war planes, structures used marine platforms, flame retardant plastics carbon/carbon composites due to having mentioned favorable properties. In article, phenolic samples Resole reinforced with carbon fibers graphene nanoparticles were prepared. last decade, development new polymer nanocomposites has grown significantly. contrast conventional common composites, a feature which filler that size less than 100 nm at least one dimension is used. One advantages it gives several properties primary polymer, despite fact creates limitations its processability other reinforcements. The key these features design behavior nanocomposites, includes nanoparticle interface between matrix. Nowadays, engineering applications, necessary combine materials, not possible use type material satisfies all desired For example, aerospace industry, there need for materials strength, lightness, wear resistance good ultraviolet light do lose their strength temperatures. Since difficult find above properties, better look method solution composite materials.
Язык: Английский
Процитировано
30
Results in Chemistry, Год журнала: 2023, Номер 7, С. 101300 - 101300
Опубликована: Дек. 31, 2023
Lung cancer is one of the most common diseases worldwide today and has highest mortality rate among cancers. Therefore, early diagnosis this disease special importance. Due to fact that methods for detecting lung are costly time-consuming, providing cheaper faster received attention. With significant development nanotechnology in recent years various nanomaterials, activities have been carried out field. Recent studies show graphene oxide due their unique properties, a high potential design biosensors detect cancer.
Язык: Английский
Процитировано
30
Case Studies in Chemical and Environmental Engineering, Год журнала: 2023, Номер 9, С. 100591 - 100591
Опубликована: Дек. 23, 2023
in this paper, two novel Composites zinc phosphate/Polyvinyl alcohol (ZnP-PVA) and Zinc Phosphate/Polyvinyl alcohol/Carboxymethyl cellulose (ZnP-PVA/CMC) had been synthesized by a low-temperature one-step ultrasonic-template assisted route. For characterization of samples, Scanning Electron Microscopy (SEM), X-ray diffraction (XRD), Transmission (TEM), Fourier-transform infrared spectroscopy (FTIR), Energy Dispersive X-Ray Analysis (EDAX), MIC/MBC EIS were used. FTIR spectra the composite confirmed functional groups present PVA/CMC/Zn2+ ions infraction also SEM TEM images showed composites have layered structure with rectangular microcrystals (2.8 mm width ZnP-PVA was able 100% to completely remove bacteria tested sample. As results show, Anti-corrosion efficiency inhibitor is 92.8% at 2 h, 70.6% 4 68.0% 24 h aslo ZnP-PVA/CMC 67.7% 45.6% 50.5% 24h, has investigated.
Язык: Английский
Процитировано
29
Case Studies in Chemical and Environmental Engineering, Год журнала: 2024, Номер 9, С. 100694 - 100694
Опубликована: Март 18, 2024
In This study, three new surface-modified antibacterial and anticorrosive nanocomposites (zinc Phosphate- Polyvinyl Pyrrolidone, Zinc Pyrrolidone/Hydroxy Apatite Apatite/Alginate) were synthesized in low-temperature by facile efficient method. We crosslink Alg with Zn2+ Ca2+ to make it insoluble enhancing of their physical biological properties Apatite/Alginate). Nanocrystals characterized (XRD), (FT-IR), (EDX), (SEM) (TEM). the TEM image showed that core shell nanocrystal had good dispersion a particle size 8–36, 12–38 10–45 nm, respectively. Antibacterial rate Apatite/Alginate NPs reached near 100%. To analyze EIS results obtained from equivalent circuits, parameters such as Rct, CPEdl, Rf, n, CPEf, Rt extracted. Nyquist diagrams demonstrated sample better protection than Pyrrolidone sample, at all immersion time. The phase angle (-θ 11°/96 h) was greater value compared Alginate 10°/96 4.2°/96 h), indicating transition capacitive inductive behavior longer times.
Язык: Английский
Процитировано
14
e-Prime - Advances in Electrical Engineering Electronics and Energy, Год журнала: 2024, Номер 8, С. 100510 - 100510
Опубликована: Март 13, 2024
Sustainability and lack of resources both outline need for energy storage tactics, materials, devices. In fact, is nowadays the most important, at same time challenging feature in under development developing countries. Renewable energies are focused as minimizing consumption, whereas maximizing energies. Geopolitical features together with wars middle-east Europe borderline criticize such important topic more more. Rechargeable batteries have widely been served developed continuously electronic devices a means storing electrical energy. Therefore, increasing capacity life has become target researchers working this field. Enlargement application performance windows possible by era nanotechnology, that new generations rechargeable enjoy from much higher efficiency respect to first-generation ones. article, after examining electrochemical preparations, their types discussed. Alkaline lead-acid also discussed on basis nanotechnology.
Язык: Английский
Процитировано
13