Pub Date : 2020-08-31DOI: 10.18466/cbayarfbe.742711
Serkan Dayan
The N-(3-((2-hydroxybenzylidene)amino)phenyl)benzamide Schiff base ligand (L) was synthesized, characterized, and immobilized on the fullerene material with reduction copper material. The result nanocomposite Cu/Ligand@Fullerene (M1) was characterized by FE-SEM EDX, EDX mapping, FT-IR, and XRD techniques and tested as a catalyst for reduction of nitrophenols (2-nitrophenol (2-NP), 4-nitrophenol (4-NP)) and organic dyes (methylene blue (M.B.), Rhodamine B (Rh. B)) under ambient temperature in water. The catalytic conversions and the reaction rate constant per total weight of the M1 catalyst were recorded as 89.9% and 2.71E+00 at 300 s for 2-nitrophenol, 97.9% and 5.12E+00 at 300 s for 4-nitrophenol, 90.6% and 2.72E+01 at 360 s for Rhodamine B, and 98.3% and 2.63E+00 at 60 s for methylene blue. For 4-NP, the reusability study was carried out as five cycles with 97.9%, 97.7%, 97.7%, 97.3%, and 87.3% conversions, respectively. The fabricated Cu/Ligand@Fullerene (M1) nanocomposite has good catalytic efficiency and reusability, low cost, and easy to produce.
{"title":"Copper Nanoparticles Supported on a Schiff base-Fullerene as Catalyst for Reduction of Nitrophenols and Organic Dyes","authors":"Serkan Dayan","doi":"10.18466/cbayarfbe.742711","DOIUrl":"https://doi.org/10.18466/cbayarfbe.742711","url":null,"abstract":"The N-(3-((2-hydroxybenzylidene)amino)phenyl)benzamide Schiff base ligand (L) was synthesized, characterized, and immobilized on the fullerene material with reduction copper material. The result nanocomposite Cu/Ligand@Fullerene (M1) was characterized by FE-SEM EDX, EDX mapping, FT-IR, and XRD techniques and tested as a catalyst for reduction of nitrophenols (2-nitrophenol (2-NP), 4-nitrophenol (4-NP)) and organic dyes (methylene blue (M.B.), Rhodamine B (Rh. B)) under ambient temperature in water. The catalytic conversions and the reaction rate constant per total weight of the M1 catalyst were recorded as 89.9% and 2.71E+00 at 300 s for 2-nitrophenol, 97.9% and 5.12E+00 at 300 s for 4-nitrophenol, 90.6% and 2.72E+01 at 360 s for Rhodamine B, and 98.3% and 2.63E+00 at 60 s for methylene blue. For 4-NP, the reusability study was carried out as five cycles with 97.9%, 97.7%, 97.7%, 97.3%, and 87.3% conversions, respectively. The fabricated Cu/Ligand@Fullerene (M1) nanocomposite has good catalytic efficiency and reusability, low cost, and easy to produce.","PeriodicalId":9652,"journal":{"name":"Celal Bayar Universitesi Fen Bilimleri Dergisi","volume":"123 4 1","pages":"285-291"},"PeriodicalIF":0.0,"publicationDate":"2020-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88519736","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-08-18DOI: 10.18466/cbayarfbe.740343
M. Sayar, H. Yüksel
Electricity distribution networks are critical to the delivery of energy and the continuity of the economy. The healthy and efficient operation of these networks depends on the prediction of failures, their early detection and the rapid recovery of the resulting failures. The causes of failure are internal and external factors. Many studies in different sectors that use different techniques for failure prediction in the literature. The use of artificial intelligence techniques, which are becoming increasingly important today, in failure estimates; in terms of estimation success and effectiveness, it brings many privileges compared to other techniques. In this study, a status prediction model has been developed by using artificial neural network (ANN) technique for power outages and healthy working conditions of the electricity distribution network installed in Salihli district of Manisa province. In previous studies, using artificial intelligence techniques in the energy sector generally focused on one component of network, lifetime, energy demand estimation, battery life and goods failures. The effect of meteorological factors has not been studied on the distribution network situation using artificial intelligence techniques. In this study we use hourly power outages and hourly meteorological factors that cause failures or healthy conditions. It is aimed to effective risk management and make anticipation of power outage occurring in electricity transmission network, to make preventive maintenance for failures, to make suggestions for early intervention and shortening downtime and maintenance.
{"title":"Real-Time Prediction of Electricity Distribution Network Status Using Artificial Neural Network Model: A Case Study in Salihli (Manisa, Turkey)","authors":"M. Sayar, H. Yüksel","doi":"10.18466/cbayarfbe.740343","DOIUrl":"https://doi.org/10.18466/cbayarfbe.740343","url":null,"abstract":"Electricity distribution networks are critical to the delivery of energy and the continuity of the economy. The healthy and efficient operation of these networks depends on the prediction of failures, their early detection and the rapid recovery of the resulting failures. The causes of failure are internal and external factors. Many studies in different sectors that use different techniques for failure prediction in the literature. The use of artificial intelligence techniques, which are becoming increasingly important today, in failure estimates; in terms of estimation success and effectiveness, it brings many privileges compared to other techniques. In this study, a status prediction model has been developed by using artificial neural network (ANN) technique for power outages and healthy working conditions of the electricity distribution network installed in Salihli district of Manisa province. In previous studies, using artificial intelligence techniques in the energy sector generally focused on one component of network, lifetime, energy demand estimation, battery life and goods failures. The effect of meteorological factors has not been studied on the distribution network situation using artificial intelligence techniques. In this study we use hourly power outages and hourly meteorological factors that cause failures or healthy conditions. It is aimed to effective risk management and make anticipation of power outage occurring in electricity transmission network, to make preventive maintenance for failures, to make suggestions for early intervention and shortening downtime and maintenance.","PeriodicalId":9652,"journal":{"name":"Celal Bayar Universitesi Fen Bilimleri Dergisi","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88535991","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-08-17DOI: 10.18466/cbayarfbe.683771
S. A. Sepet
We study pointwise bi-slant submersions from almost Hermitian manifold onto Riemannian manifolds. We obtain necessary and sufficient conditions for the maps to have totally geodesic fibers. Also we examined the total geodesicity of such maps.
{"title":"Pointwise Bi-slant Submersions","authors":"S. A. Sepet","doi":"10.18466/cbayarfbe.683771","DOIUrl":"https://doi.org/10.18466/cbayarfbe.683771","url":null,"abstract":"We study pointwise bi-slant submersions from almost Hermitian manifold onto Riemannian manifolds. We obtain necessary and sufficient conditions for the maps to have totally geodesic fibers. Also we examined the total geodesicity of such maps.","PeriodicalId":9652,"journal":{"name":"Celal Bayar Universitesi Fen Bilimleri Dergisi","volume":"45 1","pages":"339-343"},"PeriodicalIF":0.0,"publicationDate":"2020-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88537937","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-06-24DOI: 10.18466/CBAYARFBE.690831
D. Oskay
The phenological events are very important to understand the life cycle of a plant species. Also understanding of the life cycle of a plant species is an essential step in order to design and implement an effective conservation programme for an endangered species. The phenological characteristics of Erodium somanum (Geraniaceae), a critically endangered dioecious endemic species, were investigated at natural populations in Soma/Manisa from Turkey. All phenological characteristics are firstly determined in this study. Also, preliminary conservation essays were performed at habitat of the species. Shoot formation of plants begin first week in March and continue throughout March. The flowering season was 2 month long and peak flower production took place between mid-April and head-May. Initiation of fruit formation around first and second weeks in April. Fruit is a beak shape and leaving in mericarps. Fruits mature about four weeks and then mericarps suddenly throw away from plant. Seedling formation of scattered mericarps are occur in autumn (Septemper- November). According to life cycle of this plant, germination period was found as autumn season. For better in-situ application program it was found that, seedling have to be applied at latest of the summer season.
{"title":"Conservation Essays and Phenology of Critically Endangered Endemic Plant Erodium somanum","authors":"D. Oskay","doi":"10.18466/CBAYARFBE.690831","DOIUrl":"https://doi.org/10.18466/CBAYARFBE.690831","url":null,"abstract":"The phenological events are very important to understand the life cycle of a plant species. Also understanding of the life cycle of a plant species is an essential step in order to design and implement an effective conservation programme for an endangered species. The phenological characteristics of Erodium somanum (Geraniaceae), a critically endangered dioecious endemic species, were investigated at natural populations in Soma/Manisa from Turkey. All phenological characteristics are firstly determined in this study. Also, preliminary conservation essays were performed at habitat of the species. Shoot formation of plants begin first week in March and continue throughout March. The flowering season was 2 month long and peak flower production took place between mid-April and head-May. Initiation of fruit formation around first and second weeks in April. Fruit is a beak shape and leaving in mericarps. Fruits mature about four weeks and then mericarps suddenly throw away from plant. Seedling formation of scattered mericarps are occur in autumn (Septemper- November). According to life cycle of this plant, germination period was found as autumn season. For better in-situ application program it was found that, seedling have to be applied at latest of the summer season.","PeriodicalId":9652,"journal":{"name":"Celal Bayar Universitesi Fen Bilimleri Dergisi","volume":"44 1","pages":"237-243"},"PeriodicalIF":0.0,"publicationDate":"2020-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78533705","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-06-24DOI: 10.18466/CBAYARFBE.687098
S. Bayram, F. Kacı, Nesrin Ecem Bayram, Arzu Görmez
In this study, palynological and antibacterial tests of propolis samples from Iran-Turan (IP1 and IP2), Mediterranean (MP), and Europe-Siberia (EP) phytogeographical regions were performed. The pollens of Asteraceae, Betulaceae, Boraginaceae, Brassicaceae, Campanulaceae, Caryophyllaceae, Fabaceae, Fagacee, Lamiaceae, Pinaceae, Salicaceae, Ranunculaceae, Rosaceae and Scrophulariaceae taxa were found in the palynological analysis. However, gram negative and gram positive bacteria were used to determine in vitro antibacterial activities of the propolis samples. The most potent inhibitory effect against the target microorganisms was obtained from IP1. The most resistant strains were Burkholderia cepacia, Citrobacter freundii and Streptococcus pneumoniae for all the propolis samples. But, the antibacterial activity levels of the samples were quite different from each other. These results indicate that propolis can be assessed in different areas such as cosmetic, medicine and food as an antimicrobial agent.
{"title":"A mini report on palynological and antibacterial tests of four propolis samples from different regional origins","authors":"S. Bayram, F. Kacı, Nesrin Ecem Bayram, Arzu Görmez","doi":"10.18466/CBAYARFBE.687098","DOIUrl":"https://doi.org/10.18466/CBAYARFBE.687098","url":null,"abstract":"In this study, palynological and antibacterial tests of propolis samples from Iran-Turan (IP1 and IP2), Mediterranean (MP), and Europe-Siberia (EP) phytogeographical regions were performed. The pollens of Asteraceae, Betulaceae, Boraginaceae, Brassicaceae, Campanulaceae, Caryophyllaceae, Fabaceae, Fagacee, Lamiaceae, Pinaceae, Salicaceae, Ranunculaceae, Rosaceae and Scrophulariaceae taxa were found in the palynological analysis. However, gram negative and gram positive bacteria were used to determine in vitro antibacterial activities of the propolis samples. The most potent inhibitory effect against the target microorganisms was obtained from IP1. The most resistant strains were Burkholderia cepacia, Citrobacter freundii and Streptococcus pneumoniae for all the propolis samples. But, the antibacterial activity levels of the samples were quite different from each other. These results indicate that propolis can be assessed in different areas such as cosmetic, medicine and food as an antimicrobial agent.","PeriodicalId":9652,"journal":{"name":"Celal Bayar Universitesi Fen Bilimleri Dergisi","volume":"42 1","pages":"143-148"},"PeriodicalIF":0.0,"publicationDate":"2020-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81048452","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-06-24DOI: 10.18466/CBAYARFBE.654782
Serhat Aras, I. Tanzer, T. Ikizceli
In this study, the effects of various bolus materials on dose distributions were compared in electron conformal radiotherapy (ECRT). Superflab, Super Stuff pink wax and Paraffin wax bolus materials are used with 15MeV electron energy for dosimetric comparison. Additionally, 10 mm thick Super Stuff pink wax bolus and paraffin wax bolus materials were placed on the right eyelid of a patient. Using electron dose calculation algorithm and ion chamber measurements, dosimetric comparisons were made in the Eclipse treatment planning system (TPS). Both for measured and calculated dose, values were acquired 3 times and averaged for each case. Resulting differences are expressed as percentage differences. Dose differences were obtained in measurements with and without using bolus at several locations of the solid phantom, performed by the Roos Ion chamber. Dosimetric differences of 7-7.5% for Superflab, 10-10.5% for paraffin bolus and 13-14% for Super Stuff pink wax bolus are obtained. Besides, when dosimetric comparisons are made in the treatment planning system for cases with and without bolus; Dose differences were calculated to be 2-2.5% for superflab silicon bolus, 3-3.5% for paraffin wax bolus and 5-6% for Super Stuff pink wax bolus. To increase skin dose in curved anatomical structures in radiotherapy, it is safe to use the paraffin wax bolus material in radiotherapy clinic, as an alternative to Superflab silicon bolus and Super Stuff pink wax bolus materials, due to its low cost and ease of conforming to body surface contours.
{"title":"Comparison of Dose Distribution Effects for Various Bolus Materials in Electron Conformal Radiotherapy","authors":"Serhat Aras, I. Tanzer, T. Ikizceli","doi":"10.18466/CBAYARFBE.654782","DOIUrl":"https://doi.org/10.18466/CBAYARFBE.654782","url":null,"abstract":"In this study, the effects of various bolus materials on dose distributions were compared in electron conformal radiotherapy (ECRT). Superflab, Super Stuff pink wax and Paraffin wax bolus materials are used with 15MeV electron energy for dosimetric comparison. Additionally, 10 mm thick Super Stuff pink wax bolus and paraffin wax bolus materials were placed on the right eyelid of a patient. Using electron dose calculation algorithm and ion chamber measurements, dosimetric comparisons were made in the Eclipse treatment planning system (TPS). Both for measured and calculated dose, values were acquired 3 times and averaged for each case. Resulting differences are expressed as percentage differences. Dose differences were obtained in measurements with and without using bolus at several locations of the solid phantom, performed by the Roos Ion chamber. Dosimetric differences of 7-7.5% for Superflab, 10-10.5% for paraffin bolus and 13-14% for Super Stuff pink wax bolus are obtained. Besides, when dosimetric comparisons are made in the treatment planning system for cases with and without bolus; Dose differences were calculated to be 2-2.5% for superflab silicon bolus, 3-3.5% for paraffin wax bolus and 5-6% for Super Stuff pink wax bolus. To increase skin dose in curved anatomical structures in radiotherapy, it is safe to use the paraffin wax bolus material in radiotherapy clinic, as an alternative to Superflab silicon bolus and Super Stuff pink wax bolus materials, due to its low cost and ease of conforming to body surface contours.","PeriodicalId":9652,"journal":{"name":"Celal Bayar Universitesi Fen Bilimleri Dergisi","volume":"246 1","pages":"201-205"},"PeriodicalIF":0.0,"publicationDate":"2020-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73244286","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-06-24DOI: 10.18466/CBAYARFBE.677407
Tugay Üstün, V. Eskizeybek, A. Avci
In this study, tungsten oxide (WO3) nanoparticles were produced with a preferential nanocube morphology by using selenium (Se) and lanthanum (La) catalysts in de-ionized water by arc discharge method. Se-La catalysts were added to the tungsten (W) electrodes during the production of nanocubes and the structural and morphological features of these nanocubes were investigated. The nanocube structures were imaged with scanning electron microscopy (SEM) and permeable electron microscopy (TEM), and the dimensions of the nanocubes were between 10-50 nm. X-ray diffraction (XRD) results revealed that the synthesized nanostructures exhibited a monoclinic WO3 crystal structure. The arc discharge is a simple, inexpensive and low-cost method and the production of WO3 nanocubes at a high purity rate has been successfully achieved with this method.
{"title":"Selectively Nanocubes Formation of Tungsten Oxide (WO3)","authors":"Tugay Üstün, V. Eskizeybek, A. Avci","doi":"10.18466/CBAYARFBE.677407","DOIUrl":"https://doi.org/10.18466/CBAYARFBE.677407","url":null,"abstract":"In this study, tungsten oxide (WO3) nanoparticles were produced with a preferential nanocube morphology by using selenium (Se) and lanthanum (La) catalysts in de-ionized water by arc discharge method. Se-La catalysts were added to the tungsten (W) electrodes during the production of nanocubes and the structural and morphological features of these nanocubes were investigated. The nanocube structures were imaged with scanning electron microscopy (SEM) and permeable electron microscopy (TEM), and the dimensions of the nanocubes were between 10-50 nm. X-ray diffraction (XRD) results revealed that the synthesized nanostructures exhibited a monoclinic WO3 crystal structure. The arc discharge is a simple, inexpensive and low-cost method and the production of WO3 nanocubes at a high purity rate has been successfully achieved with this method.","PeriodicalId":9652,"journal":{"name":"Celal Bayar Universitesi Fen Bilimleri Dergisi","volume":"2 1","pages":"149-153"},"PeriodicalIF":0.0,"publicationDate":"2020-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91190496","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-06-24DOI: 10.18466/CBAYARFBE.658921
Nisa İrem Büyük, P. P. Arayici, S. Derman, Z. Mustafaeva, S. Yücel
Studies have been carried out to determine the optimum conditions for chitosan nanoparticles. Various formulations have been made which can affect the size and polydispersity index of the nanoparticles and the process variables have been investigated. These formulation and process variables are defined and optimized to obtain the smallest particle size. The concentration of chitosan polymer and crosslinker concentration were studied as formulation variables. Mixing speed, mixing time, pH, sunlight effect, sonication time and sonication power parameters were selected as process variables. In the experiments performed for one parameter all other parameters are kept constant. The optimum conditions were determined by the effect of formulation and process variables on particle size and polydispersity index. For characterization of chitosan nanoparticles; Zeta-Sizer, UV-Vis, FTIR and SEM analytical techniques were used. Optimum conditions found at 50 W, 5 min, 30-10 pulse adjustment with sonicator device, chitosan:TPP mass ratio 5:1, pH value of 5 and with sunlight. After the optimum conditions obtained BSA loading is performed and characterization studies carried out. It is believed that chitosan nanoparticles produced by optimum conditions determined as a result of the study can be used in many areas include as a drug delivery system in future studies.
{"title":"An Optimization Study for Chitosan Nanoparticles: Synthesis and Characterization","authors":"Nisa İrem Büyük, P. P. Arayici, S. Derman, Z. Mustafaeva, S. Yücel","doi":"10.18466/CBAYARFBE.658921","DOIUrl":"https://doi.org/10.18466/CBAYARFBE.658921","url":null,"abstract":"Studies have been carried out to determine the optimum conditions for chitosan nanoparticles. Various formulations have been made which can affect the size and polydispersity index of the nanoparticles and the process variables have been investigated. These formulation and process variables are defined and optimized to obtain the smallest particle size. The concentration of chitosan polymer and crosslinker concentration were studied as formulation variables. Mixing speed, mixing time, pH, sunlight effect, sonication time and sonication power parameters were selected as process variables. In the experiments performed for one parameter all other parameters are kept constant. The optimum conditions were determined by the effect of formulation and process variables on particle size and polydispersity index. For characterization of chitosan nanoparticles; Zeta-Sizer, UV-Vis, FTIR and SEM analytical techniques were used. Optimum conditions found at 50 W, 5 min, 30-10 pulse adjustment with sonicator device, chitosan:TPP mass ratio 5:1, pH value of 5 and with sunlight. After the optimum conditions obtained BSA loading is performed and characterization studies carried out. It is believed that chitosan nanoparticles produced by optimum conditions determined as a result of the study can be used in many areas include as a drug delivery system in future studies.","PeriodicalId":9652,"journal":{"name":"Celal Bayar Universitesi Fen Bilimleri Dergisi","volume":"52 1","pages":"119-127"},"PeriodicalIF":0.0,"publicationDate":"2020-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75807370","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Glycidyl methacrylate (GMA) based low density macroporous foams (polyHIPE foams) were synthesized by high internal phase emulsion (HIPE) templating. Strengthen foams were produced by polymerizing the continuous phase of HIPEs consisting of GMA, 1,3-buthandiol dimethacrylate (BDDMA) and nanoclay. In order to ensure the compatibility of between nanoclay and the monomers surface modified nanoclay containing 25-30 wt. % methyl dihydroxyethyl hydrogenated tallow ammonium was used. The composite foams were prepared by incorporating up to 5 wt.% of nanoclay particles. Compression modulus of the composite foams was improved by ca. 60% as compared to neat polyHIPE foam. The specific compression modulus and specific compressive strength were also significantly improved by increasing the amount of nanoclay loading.
{"title":"GMA-Based Emulsion Templated Macroporous Foams: Tailoring the Mechanical Properties by Nanoclay Loading","authors":"E. H. Mert, E. Balta","doi":"10.18466/CBAYARFBE.","DOIUrl":"https://doi.org/10.18466/CBAYARFBE.","url":null,"abstract":"Glycidyl methacrylate (GMA) based low density macroporous foams (polyHIPE foams) were synthesized by high internal phase emulsion (HIPE) templating. Strengthen foams were produced by polymerizing the continuous phase of HIPEs consisting of GMA, 1,3-buthandiol dimethacrylate (BDDMA) and nanoclay. In order to ensure the compatibility of between nanoclay and the monomers surface modified nanoclay containing 25-30 wt. % methyl dihydroxyethyl hydrogenated tallow ammonium was used. The composite foams were prepared by incorporating up to 5 wt.% of nanoclay particles. Compression modulus of the composite foams was improved by ca. 60% as compared to neat polyHIPE foam. The specific compression modulus and specific compressive strength were also significantly improved by increasing the amount of nanoclay loading.","PeriodicalId":9652,"journal":{"name":"Celal Bayar Universitesi Fen Bilimleri Dergisi","volume":"12 1","pages":"135-141"},"PeriodicalIF":0.0,"publicationDate":"2020-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84319192","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-06-24DOI: 10.18466/CBAYARFBE.720791
M. Nişancı, A. Yurddaş
Sanitary tapware that can drain hot and cold water from the plumbing systems in the desired proportions by mixing are called faucet. The production of faucets used today is conducted by using a low-pressure casting method. The raw material of the body, which is the main part of faucets, is generally brass alloy (CuZn39Pb1Al-C). The material of faucet molds produced using the casting method is the copper-beryllium alloy (CuCoNiBe). In this research, K type thermocouples were placed into the mold in such a way that there was a distance of 3 mm to the casting surface, and temperature changes during the production were achieved by the measurement and recording device. 1283,1263,1243,1223,1203,1183,1163 K values of casting temperatures that were identified as critical in Ansys Fluent program and interfacial heat transfer coefficient of the combinations created by casting temperatures of 413,473,533,593,653 K were calculated numerically. Casting simulation was created in Magma program by using calculated IHTC values, and they were analysed by making a comparison between experimental and simulation temperature curves. The match of the defects was controlled by comparing the defect results of simulation in which convergence within temperature curves were provided and the defects of scrap parts in experimental production.
{"title":"Compare Between the Results of the Casting Simulation and the Results of Experimental Production with Calculating the Interface Heat Transfer Coefficient of the Casting-Mold","authors":"M. Nişancı, A. Yurddaş","doi":"10.18466/CBAYARFBE.720791","DOIUrl":"https://doi.org/10.18466/CBAYARFBE.720791","url":null,"abstract":"Sanitary tapware that can drain hot and cold water from the plumbing systems in the desired proportions by mixing are called faucet. The production of faucets used today is conducted by using a low-pressure casting method. The raw material of the body, which is the main part of faucets, is generally brass alloy (CuZn39Pb1Al-C). The material of faucet molds produced using the casting method is the copper-beryllium alloy (CuCoNiBe). In this research, K type thermocouples were placed into the mold in such a way that there was a distance of 3 mm to the casting surface, and temperature changes during the production were achieved by the measurement and recording device. 1283,1263,1243,1223,1203,1183,1163 K values of casting temperatures that were identified as critical in Ansys Fluent program and interfacial heat transfer coefficient of the combinations created by casting temperatures of 413,473,533,593,653 K were calculated numerically. Casting simulation was created in Magma program by using calculated IHTC values, and they were analysed by making a comparison between experimental and simulation temperature curves. The match of the defects was controlled by comparing the defect results of simulation in which convergence within temperature curves were provided and the defects of scrap parts in experimental production.","PeriodicalId":9652,"journal":{"name":"Celal Bayar Universitesi Fen Bilimleri Dergisi","volume":"9 1","pages":"169-181"},"PeriodicalIF":0.0,"publicationDate":"2020-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90054246","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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