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Full-Text Articles in Physical Sciences and Mathematics
Catalytic Evaluation Of Cellulose Pyrolysis By Using Nanosized Metal Oxide Catalysts, Yusuf Osman Donar, Ali̇ Tolga Ünalan, Samed Ergenekon, Ali̇ Sinağ
Catalytic Evaluation Of Cellulose Pyrolysis By Using Nanosized Metal Oxide Catalysts, Yusuf Osman Donar, Ali̇ Tolga Ünalan, Samed Ergenekon, Ali̇ Sinağ
Turkish Journal of Chemistry
In this study, effects of TiO$_{2}$ and ZnO nanometal oxides on cellulose pyrolysis have been investigated. Both catalysts have been synthesized via hydrothermal method and characterized by using different techniques. Catalytic and catalyst-free experiments were carried out so as to identify the catalytic abilities of synthesized nanoparticles. Catalyst-free experiments were carried out at 500, 600, and 700 °C in order to determine the optimal condition for pyrolysis and it was found as 700 °C. Optimum catalyst ratio for cellulose pyrolysis was found as 5% (w/w) for both TiO$_{2}$ and ZnO catalysts. GC-MS and micro-GC analyses were conducted in order to …
Electrochemical Determination Of Aripiprazole Based On Aluminium Oxide Nanoparticles Modified Carbon Paste Electrode, Funda Öztürk, Eli̇f Yüksel, Pinar Esra Erden, Esma Kiliç
Electrochemical Determination Of Aripiprazole Based On Aluminium Oxide Nanoparticles Modified Carbon Paste Electrode, Funda Öztürk, Eli̇f Yüksel, Pinar Esra Erden, Esma Kiliç
Turkish Journal of Chemistry
The electrochemical oxidation of aripiprazole was explored at a carbon paste electrode modified with aluminium oxide nanoparticles by cyclic voltammetry and square-wave anodic adsorptive stripping voltammetry. Experimental parameters such as carbon paste composition, scan rate, buffer pH, accumulation time, and accumulation potential were optimized in order to obtain high analytical performance. The incorporation of aluminium oxide nanoparticles into the carbon paste matrix enhanced the effective surface area of the carbon paste electrode and improved the sensitivity. On the aluminium oxide nanoparticles modified carbon paste electrode, aripiprazole exhibited an irreversible anodic peak at +1.17 V in pH 1.8 BR buffer solution. …
Estimation Of The Work Of Adhesion Between Ito And Polymer Substrates: A Surface Thermodynamics Approach, Sali̇h Özbay
Estimation Of The Work Of Adhesion Between Ito And Polymer Substrates: A Surface Thermodynamics Approach, Sali̇h Özbay
Turkish Journal of Chemistry
Indium tin oxide (ITO) is one of the most widely used semiconductor among transparent conducting oxides (TCOs) due to their electrical conductivity and optical transparency properties. Since the development of low temperature deposition methods, coating of ITO on polymer substrates especially for use in flexible electronics has been a popular topic. The existence of adequate adhesion strength between ITO and polymer is critical in producing a successful film. Nowadays, polycarbonate (PC), poly(methyl methacrylate) (PMMA) and polyethyleneterephtalate (PET) are frequently used as substrates for such coatings. However, there may be other polymeric alternatives that have a potential to be used for …
Structure-Emission Relationship Of Some Coumarin Laser Dyes And Related Molecules: Prediction Of Radiative Energy Dissipation And The Intersystem Crossing Rate Constants, Msa Abdelmottaleb
Structure-Emission Relationship Of Some Coumarin Laser Dyes And Related Molecules: Prediction Of Radiative Energy Dissipation And The Intersystem Crossing Rate Constants, Msa Abdelmottaleb
Turkish Journal of Chemistry
Dye lasers are commonly used in optical investigation because their solutions in organic solvents deliver tunable, coherent emissions. They exhibit intense fluorescence owing to some specific spectroscopic characteristics. One drawback of the laser dyes is that it shows excessive triplet-state losses (TSLs.) The lack of theoretical predictions of fluorescence rates, intersystem crossing (ISC), and phosphorescence in laser dyes prompted us to report on the predicted rates of radiative and nonradiative transitions of some laser dyes. Structural engineering by some substituents influencing the simulated rates of coumarin laser dye derivatives for an efficient operation was investigated. The NH$_{2}$ functional group renders …
Design, Synthesis, And Enzyme Inhibition Evaluation Of Some Novel Mono- And Di-O-Ss-D-Glycopyranosyl Chalcone Analogues With Molecular Docking Studies, Gonca Çeli̇k, Gi̇zem Tatar Yilmaz, Hüseyi̇n Şahi̇n, Burak Barut, Nuretti̇n Yayli
Design, Synthesis, And Enzyme Inhibition Evaluation Of Some Novel Mono- And Di-O-Ss-D-Glycopyranosyl Chalcone Analogues With Molecular Docking Studies, Gonca Çeli̇k, Gi̇zem Tatar Yilmaz, Hüseyi̇n Şahi̇n, Burak Barut, Nuretti̇n Yayli
Turkish Journal of Chemistry
In this study, some novel mono- and di-O-β-D-glycopyranosyl chalcone analogs were designed, synthesized, and characterized. The chalcone derivatives were synthesized with good yields by base-catalyzed Claisen-Schmidt condensation in EtOH solution. Then these chalcones were reacted with TAGBr (2,3,4,6-tetra-O-acetyl-μ-D-glucopyranosylbromide) in dry acetone under the anhydrous condition at 0-5 °C. Deacylated was carried out by the Zemplen's method with NaOCH3 in dry methanol results in substituted chalcone-O-glycosides (mono- and di-O-β-D-glycopyranosyl chalcone analogs). The chemical structures of all synthesized compounds were elucidated based on IR, NMR spectral data, and mass spectrometry. Further, the compounds (7a-c, 8a-c, 12a-c, 16a-c, and 17a-c) …
Fabrication Of Dendritic Pdcu Alloy Supported On 3d N-Doped Hollow Graphene For Efficient Ethanol Electrooxidation, Zhijie Ji̇ang, Shuiyuan Fu, Wei Zhao, Xvtang Liu, Fei Wang, Mingyu Cui, Linyang Dong
Fabrication Of Dendritic Pdcu Alloy Supported On 3d N-Doped Hollow Graphene For Efficient Ethanol Electrooxidation, Zhijie Ji̇ang, Shuiyuan Fu, Wei Zhao, Xvtang Liu, Fei Wang, Mingyu Cui, Linyang Dong
Turkish Journal of Chemistry
Fabricating highly efficient Pd-based nanocatalysts with a well-defined structure is desired for the commercialization of direct ethanol fuel cell (DEFC). Herein, a series of hierarchical three-dimensional N-doped hollow graphene spheres (NHGS) supported dendritic PdCu alloy catalysts Pd$_{x}$Cu$_{(d)}$-NHGS (x: Cu/Pd theoretical molar ratio of 4, 2, and 1) are assembled by one-pot ascorbic acid reduction-immobilization method. Aiming to maximize the Pd utilization and realize the efficient ethanol electrooxidation, this novel electrocatalyst offers potent activity sites and promotes electron and ion kinetics simultaneously. Characterization indicates that the as-obtained Pd$_{4}$Cu$_{(d)}$ alloy nanoparticles with average sizes of approximately 55 nm are evenly dispersed on …
Effect Of Microfluidic Channel Integration Onto Gold Microelectrode On Its Redox Electrochemistry, Ahmet Uçar, Zahraa Ali Hajool, Hamed Ghorbanpoor, Reza Didarian, Fatma Doğan Güzel
Effect Of Microfluidic Channel Integration Onto Gold Microelectrode On Its Redox Electrochemistry, Ahmet Uçar, Zahraa Ali Hajool, Hamed Ghorbanpoor, Reza Didarian, Fatma Doğan Güzel
Turkish Journal of Chemistry
Microfluidic systems have attracted significant interest in recent years as they are extensively employed in lab-on-chip and organ-on-chip research. Their combination with electrochemical platforms offers many advantages, promising a high potential for sensing applications, still the microfluidic-channel integration onto electrodes might induce challenges related to changes in signal-tonoise ratios and mass transport conditions. In this study, we investigated the effect of microfluidic channel integration in redox behavior of thermally deposited gold thin film microelectrodes by voltammetric (CV and SWV) electrochemical measurements. Using different dimensions of PDMS microfluidic channels (i.e. widths of 50, 100, 250, and 500 μm) and a constant …
Enhanced Ionic Conductivity And Mechanical Strength In Nanocomposite Electrolytes With Nonlinear Polymer Architectures, Recep Bakar, Saeid Darvishi, Erkan Şenses
Enhanced Ionic Conductivity And Mechanical Strength In Nanocomposite Electrolytes With Nonlinear Polymer Architectures, Recep Bakar, Saeid Darvishi, Erkan Şenses
Turkish Journal of Chemistry
Solvent-free polymer-based electrolytes (SPEs) have gained significant attention to realize safer and flexible lithium-ion batteries. Among all polymers used for preparing SPEs electrolytes, poly(ethylene oxide), a biocompatible and biodegradable polymer, has been the most prevalent one mainly because of its high ionic conductivity in the molten state, the capability for the dissolution of a wide range of different lithium salts as well as its potential for the environmental health and safety. However, linear PEO is highly semicrystalline at room temperature and thus exhibits weak mechanical performance. Addition of nanoparticles enhances the mechanical strength and effectively decreases the crystallization of linear …
Synthesis Of Pyridinium-Based Ionic Liquids And Their Application To Improve Candida Rugosa Lipase Stability In A Methanol-Water Solvent System, Oktavianus Cipta, Anita Alni, Rukman Hertadi
Synthesis Of Pyridinium-Based Ionic Liquids And Their Application To Improve Candida Rugosa Lipase Stability In A Methanol-Water Solvent System, Oktavianus Cipta, Anita Alni, Rukman Hertadi
Turkish Journal of Chemistry
This paper studied the effect of pyridinium-based ionic liquids as cosolvents in a methanol-water solvent system on the hydrolytic activity of Candida rugosa lipase. These ionic liquids were successfully synthesized using imidazolium-based ionic liquid synthesizing methods with a certain adjustment. The hydrolytic activity of Candida rugosa lipase was analyzed using 4-nitrophenol acetate (pNPA) and 4-nitrophenol palmitate (pNPP) as substrates. The addition of ionic liquids had no significant effect on the hydrolytic activity of lipase in a water solvent, and it had a greater effect in methanol. The addition of [C6Py] Br ionic liquid as a methanol cosolvent (methanol: ionic liquid, …
Structural And Dielectrical Behavior Of Polypyrrole/Huntite Composites, Zeynep Türk, Nazlican Şahi̇n, Seyfullah Madakbaş, Ferhat Şen, Kadi̇r Esmer
Structural And Dielectrical Behavior Of Polypyrrole/Huntite Composites, Zeynep Türk, Nazlican Şahi̇n, Seyfullah Madakbaş, Ferhat Şen, Kadi̇r Esmer
Turkish Journal of Chemistry
In order to characterize stable composites that will contribute to industrial applications, polypyrrole (PPy)/huntite composites were prepared by the physical method. Polypyrrole (PPy)/huntite composites were produced at various huntite concentrations (10, 20, 30, 40 wt.%). Polypyrrole/huntite was characterized by Fourier transform infrared spectroscopy (FTIR), Thermal Gravimetric Analyses (TGA), Differential Thermal Analyses (DTA), Scanning electron microscopy (SEM), and dielectrical properties were investigated by Impedance Analyzer at the room temperature. The FTIR spectra show that huntite mineral coordinate with polymers through carbonate groups. TGA results indicate the main cause of mass loss can be moisture in the samples and unreacted pyrrole monomer. …
Surfactant Incorporated Preyssler Polyoxoanion: A Transition Metal Substituted Mo-Php Complex And Its Applications, Bharath Samannan, Jothi Selvam, Yi-Li Lin, Praveen Peter, Jeyabalan Thavasikani
Surfactant Incorporated Preyssler Polyoxoanion: A Transition Metal Substituted Mo-Php Complex And Its Applications, Bharath Samannan, Jothi Selvam, Yi-Li Lin, Praveen Peter, Jeyabalan Thavasikani
Turkish Journal of Chemistry
The complex was prepared with preyssler polyoxoanion and transition metal (Mo), a cationic surfactant as a connector. It has tuneable physical and chemical potential which has been exploited to study novel properties. A new technique of shock wave impulses is also used on the Mo-PHP complex. Extensive use of cationic surfactants could impact accumulation in the environment set off the surfacing of bacterial resistance. Due to the electrostatic binding to bacterial surface, the hydrophobic parts of cationic surfactants tend to penetrate bacterial cell walls and may cause membrane lysis and bacteria death. The surfactant-supported and direct release of metal ions …
Electrochemical Behavior, Antimicrobial Activities, And Effect Of Temperature On Micellization Of Imidazolium Monomeric Surfactants, Vinit Sharma, Tokuma Getahun, Manpreet Singh, Jaswinder Kaur, Nandita Thakur, Kamal Kishore
Electrochemical Behavior, Antimicrobial Activities, And Effect Of Temperature On Micellization Of Imidazolium Monomeric Surfactants, Vinit Sharma, Tokuma Getahun, Manpreet Singh, Jaswinder Kaur, Nandita Thakur, Kamal Kishore
Turkish Journal of Chemistry
In the present study, we herein report the conductance behavior, effect of temperature, and chain-length of two environmentally friendly imidazolium cationic capric and stearic surfactants. The conductance behavior has been carried out in aqueous solvent (H2O) at four different temperatures such as 24 °C, 29 °C, 34 °C, and 39 °C. The normal micelles were formed in an aqueous solvent and critical micelle concentration (CMC) can be estimated through conductivity parameters. The expected dependency of the CMC on the alkyl chain length of the 3-(2-(decanoyloxy)ethyl)-1-methyl-1H-imidazol-3-ium-bromide and 3-(2-(octadecanoyloxy)ethyl)-1-methyl-1Himidazol- 3-ium-bromide was demonstrated. It was observed that the graphs of molar conduct activity …
Gan/Zno Hybrid Nanostructures For Improved Photocatalytic Performance: One-Step Synthesis, Tugay Üstün, Bi̇rcan Haspulat Taymaz, Volkan Eski̇zeybek, Handan Kamiş, Ahmet Avci
Gan/Zno Hybrid Nanostructures For Improved Photocatalytic Performance: One-Step Synthesis, Tugay Üstün, Bi̇rcan Haspulat Taymaz, Volkan Eski̇zeybek, Handan Kamiş, Ahmet Avci
Turkish Journal of Chemistry
Nanostructured semiconductor materials are considered potential candidates for the degradation of textile wastewater via the photocatalytic process. This study aims to produce hexagonal gallium nitride (GaN) nanoplates and zinc oxide (ZnO) nanoparticles in a deionized water environment utilizing a one-step arc discharge process. Detailed characterization of samples has been completed via scanning electron microscope (SEM), transmission electron microscope (TEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and UV visible spectroscopy methods. The hybrid nanostructure morphologies consist of nanoplates and nanorods of different sizes. The photoperformance of GaN/ZnO hybrid nanostructures was assessed via the malachite green (MG) dye degradation under …
Effect Of Size-Graded And Polydopamine-Coated Halloysite Nanotubes On Fundamental Properties Of Low-Density Polyethylene Nanocomposite Film, Cüneyt Erdi̇nç Taş
Effect Of Size-Graded And Polydopamine-Coated Halloysite Nanotubes On Fundamental Properties Of Low-Density Polyethylene Nanocomposite Film, Cüneyt Erdi̇nç Taş
Turkish Journal of Chemistry
In this study, some of the critical fundamental properties, which are holding importance in usage areas, of low-density polyethylene (LDPE) film were studied by embedding size-graded and polydopamine-coated halloysite nanotubes into the polymer matrix. This concept evaluated the importance of the well-dispersion of nanoparticles in the composite system and interfacial adhesion between nanofiller and polymer matrix on the degree of crystallinity and mechanical properties. For this purpose, halloysite nanotubes, coated with polydopamine and size graded afterward, were integrated into the LDPE matrix by the twin-screw extrusion process, following which, nanocomposite films were prepared by film-blown technique. Both effects of halloysite …
The Effect Of Poss Nanoparticles On Crosslinking Of Styrene-Butadiene Rubber Nanocomposites, Seda Beki̇n Açar, Mehmet Ati̇lla Taşdelen, Bağdagül Karaağaç
The Effect Of Poss Nanoparticles On Crosslinking Of Styrene-Butadiene Rubber Nanocomposites, Seda Beki̇n Açar, Mehmet Ati̇lla Taşdelen, Bağdagül Karaağaç
Turkish Journal of Chemistry
The effect of octaisobutyl-polyhedral oligomeric silsesquioxane (OIB-POSS) as a nanosized reinforcement on the cure kinetics, crosslinking density, and mechanical properties of styrene-butadiene rubber (SBR) nanocomposites was examined in this study. For this purpose, SBR compounds with various OIB-POSS nanoparticle loadings at 1, 3, and 5 phr were prepared and their results were compared with a reference compound without OIB-POSS. When 1 phr of OIB-POSS was added to the rubber matrix, the elongation at break values and tensile strength of the corresponding nanocomposite increased by 24.1% and 29.2% compared to the reference sample, respectively. The presence of OIB-POSS nanoparticles and their …
Privileged Fragment-Based Design, Synthesis And In Vitro Antitumor Activity Of Imatinib Analogues, Hongyu Jiang, Yuankun Wang, Maokai Jiang, Lei Yao
Privileged Fragment-Based Design, Synthesis And In Vitro Antitumor Activity Of Imatinib Analogues, Hongyu Jiang, Yuankun Wang, Maokai Jiang, Lei Yao
Turkish Journal of Chemistry
Based on the privileged fragment-based drug design strategy, a series of imatinib analogues bearing the moiety of 3-(2-amino- 2-oxoacetyl)-1H-indole were designed and synthesized, and the in vitro antitumor activity of these compounds was detected by MTT method using K562 (human myeloid leukemia) and K562R (imatinib-resistant chronic myeloid leukemia) cell lines. Molecular docking was used to preliminarily explain the possible binding modes. The most potent compound I2 exhibited better antitumor activity than those of imatinib against K562 and K562R cancer cells with IC50 values of 0.8 ?M and 0.7 ?M.
H2(G) Production From Dimethylamine Borane By Cu0/Wo3 Nps Catalyst, Doaa Al-Hameedawi̇, Seda Karaboğa, İzzet Morkan
H2(G) Production From Dimethylamine Borane By Cu0/Wo3 Nps Catalyst, Doaa Al-Hameedawi̇, Seda Karaboğa, İzzet Morkan
Turkish Journal of Chemistry
Cu0 NPs supported on tungsten (VI) oxide (WO3) were in situ generated from the reduction of Cu2+ ions during dehydrogenation of dimethylamine borane (DMAB). The Cu0/WO3 NPs displayed tangible catalytic activity in H2 (g) releasing reaction and they were identified by using advanced techniques. Cu0/WO3 NPs were found as active catalyst providing one equiv. H2(g) per mole of DMAB. The results from TEM images display the formation of Cu0 NPs with an average particle size of 4.6 ± 1.0 nm on the surface of WO3. Moreover, Cu0/WO3 NPs with various metal loadings were prepared and tested as catalyst in dehydrogenation …
Ultrasound-Assisted Synthesis Of Rgo/Sio2-Based Nanosheets And Their Electrochemical Performances In Li-Ion Batteries, Ersu Lökçü, Süleyman Can, Mustafa Anik
Ultrasound-Assisted Synthesis Of Rgo/Sio2-Based Nanosheets And Their Electrochemical Performances In Li-Ion Batteries, Ersu Lökçü, Süleyman Can, Mustafa Anik
Turkish Journal of Chemistry
In this study, a facile approach has been developed to fabricate GO/SiO2 nanosheets by the hydrolysis of tetraethyl orthosilicate (TEOS) in the graphene oxide (GO) solution with the assistance of the ultrasonication. The morphology and structure of the SiO2/GO nanosheets were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared (FTIR) and Raman spectroscopy. The results showed that the covalently bonded SiO2 nanoparticles onto the GO sheets were dense and uniform. The agglomeration of the nanosheets was prevented by the ultrasonication and the layer sizes decreased throughout the synthesis process. The size and thickness of the SiO2 …
Carbon Nanotube/Waterborne Polyurethane Nanocomposites With Light-To-Heat Conversion Properties, Hayri̇ye Ünal
Carbon Nanotube/Waterborne Polyurethane Nanocomposites With Light-To-Heat Conversion Properties, Hayri̇ye Ünal
Turkish Journal of Chemistry
Photothermal materials and coatings which can create temperature elevations under light irradiation can be utilized in various applications requiring remote heating. Here, multiwalled carbon nanotubes (MWNT) were incorporated into waterborne polyurethane (PU) to obtain photothermal coatings with light-to-heat conversion properties. Resulting PU-MWNT coatings were demonstrated to heat up to 80 °C under sunlight irradiation at 2 sunlight density for 18 min. Pseudomonas aeruginosa (P. aeruginosa) cells attached to surfaces coated with PU-MWNT nanocomposites were killed upon near infrared (NIR) light irradiation at 808 nm for 15 min, whereas the same cells attached to control neat PU-coated surfaces remained alive under …
Ultraviolet-Activated Clamshell Hydroxyapatite-Substituted Palladium In The Photoreduction Of Methyl Orange Water Pollutant, Anis Liyana Azhar, Azman Ma'amor, Nurhidayatullaili Muhd Julkapli, Nor Asrina Sairi, Aina Sofea Noraizat
Ultraviolet-Activated Clamshell Hydroxyapatite-Substituted Palladium In The Photoreduction Of Methyl Orange Water Pollutant, Anis Liyana Azhar, Azman Ma'amor, Nurhidayatullaili Muhd Julkapli, Nor Asrina Sairi, Aina Sofea Noraizat
Turkish Journal of Chemistry
This study focuses on the modification of natural hydroxyapatite (HAp) derived from clamshell by impregnation with palladium (Pd) at different pH in wet precipitation method to produce photoactive green materials for the degradation of synthetic dyes. It was found that, at pH 10, Pd has been successfully impregnated into HAp lattice with Ca/P ratio of 1.77 and particle distribution size range of 40?470 nm. The impregnation has resulted in the band gap of Pd/HAp at 3.19 eV, as calculated using Tauc?s plot from the UV-Vis spectroscopy data of the Pd/HAp. Next, the photocatalytic activities of Pd/HAp were carried out with …
Imaging Supermolecular Interactions Of The Pharmaceutical- Cocrystal Of Apigeninnicotinamide Binding With Serum Albumin, Yuting Sun, Ming Guo, Xiaoxue Zhao, Ronghui Wu
Imaging Supermolecular Interactions Of The Pharmaceutical- Cocrystal Of Apigeninnicotinamide Binding With Serum Albumin, Yuting Sun, Ming Guo, Xiaoxue Zhao, Ronghui Wu
Turkish Journal of Chemistry
In this paper, a new pharmaceutical cocrystal was synthesized using apigenin (AP) and pharmaceutically acceptable conformer nicotinamide (Nico), and the drug delivery between AP-Nico pharmaceutical cocrystal and human serum albumin (HSA) in vivo was studied at atomic scale. The pharmaceutical cocrystal was characterized using Fourier-transform infrared (FTIR) spectroscopy, 1H NMR spectroscopy, differential scanning calorimetry (DSC), and powder X-ray diffraction (PXRD), and the self-assembling mechanism was explored. The dissolution and cumulative release in vitro were investigated. Molecular dynamic (MD) simulation combined with fluorescence spectroscopy was used to study the delivery mechanism of AP-Nico to HSA. The results showed that AP was …
Facile Preparation Of Polyolefin-Based Amphiphilic Graft Copolymer Fibers By Combination Of Photoinduced Graft Copolymerization And Electrospinning, Çağatay Altinkök
Facile Preparation Of Polyolefin-Based Amphiphilic Graft Copolymer Fibers By Combination Of Photoinduced Graft Copolymerization And Electrospinning, Çağatay Altinkök
Turkish Journal of Chemistry
A novel amphiphilic graft copolymer possessing polypropylene (PP) main chain and poly(oligoethylene glycol methacrylate) (POEGMA) pendant units was synthesized starting from chlorinated polypropylene (PP-Cl), and characterized. PP-Cl produced macroradicals at chlorine bounded carbon atoms by visible light irradiation in the presence of dimanganese decacarbonyl [Mn2(CO)10] and initiated the free-radical photopolymerization of an acrylate monomer, namely oligoethylene glycol methacrylate (OEGMA). Furthermore, fiber formation ability of PP-g-POEGMA was tested by electrospinning technique. The chemical structure and some features of the corresponding amphiphilic graft copolymer PP-g-POEGMA was characterized by implementing spectral (FT-IR, 1H-NMR), chromatographic (GPC), morphological (SEM), water wettability (WCA), and thermal (TGA) …
Hydrophobic Surface Modification And Characterization Of Melamine Foam, Merve Okutan, Fi̇li̇z Boran, Ayça Ergün, Yusuf Kanca, Bengi̇ Özkahraman, Hüseyi̇n Deli̇göz
Hydrophobic Surface Modification And Characterization Of Melamine Foam, Merve Okutan, Fi̇li̇z Boran, Ayça Ergün, Yusuf Kanca, Bengi̇ Özkahraman, Hüseyi̇n Deli̇göz
Turkish Journal of Chemistry
Superhydrophobic and oleophilic modification of commercial acoustic melamine foam (MF) was made in this study. The modification was carried out with chitosan (CHI) and silica particles (SiO2), by using both a layer-by-layer-like approach (LbL) and dip coating technique. Subsequently, 1-octadecanethiol was used as a secondary modification agent. QCM-D, SEM, and FTIR analyses confirmed that the coating was successfully performed. After the modification, the column wall thicknesses increased than that of MF and they ranged from 25% to 48% for modified MF with an LbL-like approach (MMF) and modified MF via dip coating technique (MMFd), respectively. The sorption experiments showed that …
Spectrophotometric Quantification Of Paracetamol And Tramadol Hydrochloride By Chemometric Calibration Methods, Faysal Seli̇moğlu, Nermi̇n Pinarcik
Spectrophotometric Quantification Of Paracetamol And Tramadol Hydrochloride By Chemometric Calibration Methods, Faysal Seli̇moğlu, Nermi̇n Pinarcik
Turkish Journal of Chemistry
The results of UV spectrophotometric analysis were analysed using partial least squares (PLS) and principal component regression (PCR) techniques to allow simultaneous evaluation of tramadol hydrochloride (TRA) and p-acetaminophen (PAR) in tablets. A calibration set of 16 mixtures, each containing PAR and TRA in various amounts, was created using a 24-full fractional design. The absorbance data set for the calibration set were obtained between 215?280 nm (?? = 0.1 nm). Subsequently, the concentration and absorbance sets were used to generate PCR and PLS calibrations. The ratio spectra- first derivative method was devised as a solution to the same problem to …
Electrically Assisted Solution Blow Spinning Of Pvdf/Tpu Nanofibrous Mats For Air Filtration Applications, Andinet Kumella Eticha, Ali̇ Toptaş, Yasi̇n Akgül, Ali̇ Kiliç
Electrically Assisted Solution Blow Spinning Of Pvdf/Tpu Nanofibrous Mats For Air Filtration Applications, Andinet Kumella Eticha, Ali̇ Toptaş, Yasi̇n Akgül, Ali̇ Kiliç
Turkish Journal of Chemistry
In this study, pure polyvinylidene fluoride (PVDF), pure thermoplastic polyurethane (TPU), and PVDF/TPU blend nanofibers (1:3, 2:2, 3:1 ratios) were produced via electrically assisted solution blow spinning for air filtration applications. Scanning electron microscopy (SEM) analysis was conducted to investigate the diameters and morphology of nanofibers. The filtration performance of nanofibrous mats was examined by air filtration test with challenging with 0.26 ± 0.07 μm salt particles. Moreover, the flexibility and strength of the samples were determined via tensile tests. Results showed that pure TPU nanofibers had better mechanical properties, while pure PVDF nanofibers showed better filtration performance. However, 3PVDF/1TPU …
Effect Of Carbon Fiber Reinforcement On Dimensional Variations Of 3d Printed Polyamide-6 Composites: A Simulation Study, Ans Al Rashid, Hamid Ikram, Muammer Koç
Effect Of Carbon Fiber Reinforcement On Dimensional Variations Of 3d Printed Polyamide-6 Composites: A Simulation Study, Ans Al Rashid, Hamid Ikram, Muammer Koç
Turkish Journal of Chemistry
Due to material design and fabrication flexibility, additive manufacturing (AM) or 3D printing (3DP) processes and polymer composites have paved their way into several industrial sectors. The quality of 3D printed polymer composites is highly dependent on the reinforcement content of polymers and 3DP process parameters. Several experimental studies are performed to optimize the reinforcement contents and process parameters; however, exploring the numerical modeling and simulation techniques is vital to lower the research and development costs. In the study, the numerical simulations for the 3DP process were performed using Digimat® software for carbon fiber-reinforced polyamide-6 (PA6) composites fabricated via the …
Investigation Of The Dehydration Of Ulexite Ore With Different Parameters And Modeling With Artificial Neural Network (Ann) Method, Mustafa Engi̇n Kocadaği̇stan
Investigation Of The Dehydration Of Ulexite Ore With Different Parameters And Modeling With Artificial Neural Network (Ann) Method, Mustafa Engi̇n Kocadaği̇stan
Turkish Journal of Chemistry
Study experiments were conducted considering the temperature, time, and sample weight parameters in order to model the dehydration by applying dehydration processes to ulexite ores. Data obtained from the dehydration processes of ulexite ore were compared with TG analyzes. It was observed as the result of the heat treatment that the fastest water removal was provided in the temperature range of 150-250 °C and it was very low in the range of 400-750 °C. In order to design the ANN method, 4 different models were proposed with the same parameters in the dehydration experiments and the network structure was determined. …
Synthesis And Characterization Of Pani And Pani/Nanometal Oxides, Photocatalytic And Adsorbent Applications, Bi̇lge Budak, Si̇bel Demi̇rel
Synthesis And Characterization Of Pani And Pani/Nanometal Oxides, Photocatalytic And Adsorbent Applications, Bi̇lge Budak, Si̇bel Demi̇rel
Turkish Journal of Chemistry
In this study, polymeric nanocomposites of PANI and PANI/nanometal oxides (Fe2O3, NiO, SnO2, WO3, ZrO2) as photocatalysts were synthesized with a chemical polymerization method. Structural characterizations of synthesized polymeric nanocomposites were performed as follows: FT-IR, SEM, TEM and XRD, and TGA. The effect of pure nanometal oxides (Fe2O3, NiO, SnO2, WO3, ZrO2) and polymeric nanocomposites on the degradation of naproxen, the drug active ingredient, was studied under visible light (UV-A at 365 nm) and in the absence of light. In this study, photocatalytic and adsorbent efficiency of polymeric nanometal oxides were investigated. In order to determine the effect of pure …
Dual-Reactive Hydrogels Functionalizable Using ?Huisgen Click? And ?Schiff Base? Reactions, Nergi̇z Cengi̇z
Dual-Reactive Hydrogels Functionalizable Using ?Huisgen Click? And ?Schiff Base? Reactions, Nergi̇z Cengi̇z
Turkish Journal of Chemistry
Hydrogels incorporating different reactive groups are important platforms for the fabrication of functional materials through the conjugation of diverse molecules. In this study, a dual-reactive hydrogel system was designed utilizing aldehyde and azide groups containing methacrylate monomers. Hydrogels were obtained in the presence of a dimethacrylate crosslinker with a combination of hydrophilic PEG-based monomers via free-radical polymerization. The azide and aldehyde sites of the hydrogel network are reactive towards alkyne and amine functional groups, respectively. The advantage of the different reactivities of these functional groups was demonstrated through the attachment of two different dye molecules onto the hydrogel platform via …
Effect Of Calcium Carbonate Particle Size And Content On The Thermal Properties Of Pvc Foamed Layer Used For Coated Textiles, Mouna Stambouli, Walid Chaouch, Sondes Gargoubi, Riadh Zouari, Slah Msahli
Effect Of Calcium Carbonate Particle Size And Content On The Thermal Properties Of Pvc Foamed Layer Used For Coated Textiles, Mouna Stambouli, Walid Chaouch, Sondes Gargoubi, Riadh Zouari, Slah Msahli
Turkish Journal of Chemistry
The goal of this research is to see how the amount and particle size of calcium carbonate (CaCO$_{3}$) used in the foamed layer in use for PVC-coated textiles affects the thermal properties of the material. Two different particle sizes were used at various concentrations. The impact of different CaCO$_{3}$ loadings and particle sizes on the PVC foamed layer's thermal properties were examined. Thermogravimetry (TGA and DTG) and differential scanning calorimetry (DSC) measurements were utilized to investigate the thermal properties of the PVC foamed layer and the samples have been also characterized by FTIR spectroscopy. According to the findings, the thermal …