Iranian Journal of Materials Science and Engineering最新文献_第6页

Synthesis of Novel Imidazolium Based Ionic Liquids for Use as Multifunctional Green Additives in Gear Oils 齿轮油多功能绿色添加剂新型咪唑基离子液体的合成

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Iranian Journal of Materials Science and Engineering Pub Date : 2020-12-10 DOI: 10.22068/IJMSE.17.4.33

Shahriyar Keshavarz, M. Naimi-Jamal, M. Dekamin, Y. Izadmanesh

引用次数: 0

Surface Modification of Magnetic MnFe2O4@SiO2 Core-shell Nanoparticles with deposited Layer of 3-Aminopropyl Triethoxysilane 3-氨基丙基三乙氧基硅烷沉积层对磁性MnFe2O4@SiO2核壳纳米粒子的表面改性

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Iranian Journal of Materials Science and Engineering Pub Date : 2020-12-10 DOI: 10.22068/IJMSE.17.4.77

N. Akhlaghi, G. Najafpour, M. Mohammadi

{"title":"Surface Modification of Magnetic MnFe2O4@SiO2 Core-shell Nanoparticles with deposited Layer of 3-Aminopropyl Triethoxysilane","authors":"N. Akhlaghi, G. Najafpour, M. Mohammadi","doi":"10.22068/IJMSE.17.4.77","DOIUrl":"https://doi.org/10.22068/IJMSE.17.4.77","url":null,"abstract":"Modification of MnFe2O4@SiO2 core-shell nanoparticles with (3-aminopropyl) triethoxysilane (APTES) was investigated. The magnetite MnFe2O4 nanoparticles with an average size of ~30 nm were synthesized through a simple co-precipitation method followed by coating with silica shell using tetraethoxysilane (TEOS); that has resulted in a high density of hydroxyl groups loaded on nanoparticles. The prepared MnFe2O4@SiO2 nanoparticles were further functionalized with APTES via a silanization reaction. For having suitable surface coverage of APTES, controlled hydrodynamic size of nanoparticles with a high density of amine groups on the outer surface, the APTES silanization reaction was investigated under different reaction temperatures and reaction times. Based on dynamic lightscattering (DLS) and zeta potential results, the best conditions for the formation of APTES-functionalized MnFe2O4@SiO2 nanoparticles were defined at a reaction temperature of 70°C and the reaction time of 90 min. The effectiveness of our surface modification was established by X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR), and vibrating sample magnetometer (VSM). The prepared magnetite nanostructure can be utilized as precursors to synthesize multilayered core-shell nanocomposite particles for numerous applications such as medical diagnostics, drug, and enzyme immobilization, as well as molecular and cell separation.","PeriodicalId":14603,"journal":{"name":"Iranian Journal of Materials Science and Engineering","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2020-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46546399","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}

引用次数: 8

The Effect of Pre-reduction of Graphene Oxide on the Electrochemical Performance of rGO-TiO2 Nanocomposite 氧化石墨烯预还原对rGO-TiO2纳米复合材料电化学性能的影响

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Iranian Journal of Materials Science and Engineering Pub Date : 2020-12-10 DOI: 10.22068/IJMSE.17.4.55

Z. A. K. Abad, A. Nemati, A. M. Khachatourian, M. Golmohammad

引用次数: 2

ANTIBACTERIAL PROPERTIES OF GO, GO:Ag, GO:ZnO THIN LAYERS AND GO:ZnO/GO:Ag BILAYERS SYNTHESIZED BY SPRAY PYROLYSIS METHOD 喷雾热解法制备GO、GO:Ag、GO:ZnO薄膜及GO:ZnO/GO:Ag双层材料的抗菌性能

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Iranian Journal of Materials Science and Engineering Pub Date : 2020-12-10 DOI: 10.22068/IJMSE.17.4.170

S. M. Alduwaib, M. Abd

引用次数: 2

The Effects of Contact Paste Type and Electric Field on Physical Properties of Zirconia Bodies Made by Flash Sintering Method: Modeling Via Response Surface Methodology 接触膏体类型和电场对闪烧法制备氧化锆体物理性能的影响:响应面法建模

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Iranian Journal of Materials Science and Engineering Pub Date : 2020-12-10 DOI: 10.22068/IJMSE.17.4.93

H. Mohebbi, S. Mirkazemi

{"title":"The Effects of Contact Paste Type and Electric Field on Physical Properties of Zirconia Bodies Made by Flash Sintering Method: Modeling Via Response Surface Methodology","authors":"H. Mohebbi, S. Mirkazemi","doi":"10.22068/IJMSE.17.4.93","DOIUrl":"https://doi.org/10.22068/IJMSE.17.4.93","url":null,"abstract":"Flash sintering of 8 mol % yttria-stabilized zirconia (8YSZ) as solid oxide fuel cell (SOFC) electrolyte is studied. The relation between relative density, shrinkage, sample temperature during the flash, and incubation time, with the electric field strength, current density, as well as contact paste, are modeled by response surface methodology (RSM). The electric field strength and current density varied from 50 to 400 V.cm-1 and 50 to 200 mA.mm, respectively. Also, platinum (Pt) and lanthanum strontium manganite (LSM) used as contact paste. Results show that using LSM paste lead to higher density and more shrinkage compare with Pt paste. In contrary, the electric field strength has no significant effect on density and shrinkage. However, a minimum electric field strength equal to 80 V.cm is necessary for flash onset. As the field increases, the incubation time decreases dramatically. Compare with samples with LSM paste, samples with Pt contact paste reach a higher temperature during the flash. Flash sintered 8YSZ shows the mean grain size of 0.3 μm, which is about half of the conventionally sintered 8YSZ. Electrochemical Impedance Spectroscopy reveals despite lower mean grain size, the resistivity of flash sintered 8YSZ is lower than conventionally sintered 8YSZ.","PeriodicalId":14603,"journal":{"name":"Iranian Journal of Materials Science and Engineering","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2020-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48692769","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}

引用次数: 2

Adsorption of Zinc Oxide Nanoparticles onto Esterified Carbonize Sago Hampas: Kinetic and Equilibrium Studies 纳米氧化锌在酯化碳酸化Sago Hampas上的吸附动力学和平衡研究

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Iranian Journal of Materials Science and Engineering Pub Date : 2020-12-10 DOI: 10.22068/IJMSE.17.4.152

E. K. Droepenu, B. S. Wee, S. Chin, E. Asare

{"title":"Adsorption of Zinc Oxide Nanoparticles onto Esterified Carbonize Sago Hampas: Kinetic and Equilibrium Studies","authors":"E. K. Droepenu, B. S. Wee, S. Chin, E. Asare","doi":"10.22068/IJMSE.17.4.152","DOIUrl":"https://doi.org/10.22068/IJMSE.17.4.152","url":null,"abstract":": Sago hampas was chemically modified through esterification to adsorb both laboratory and commercial synthesized Zinc oxide nanoparticles from water in a batch adsorption studies. The esterified sago hampas (ECSH) as a bio-sorbent was characterized using Energy-dispersive X-ray spectroscopy (EDX), Fourier-transform infrared spectroscopy (FT-IR), Scanning electron microscopy (SEM), Transmission electron microscopy (TEM), and Brunauer-Emmett-Teller (BET) technique. Investigating the effect of pH, contact time, initial sorbate ion concentration, temperature and sorbent mass were carried out where adsorption parameters were analyzed using Langmuir, Freundlich and Temkin models. The correlation between Kinetics of adsorption and the rate order of Zinc oxide nanoparticles on ECSH were also determined. The adsorption of Zinc oxide nanoparticles was found to increase with increasing contact time with the attainment of equilibrium at 100 th minute with maximum removal efficiency of 85.5% (0.036 mg/g) and 89.6% (0.106 mg/g) for laboratory and commercial synthesized Zinc oxide nanoparticles from aqueous solution. An optimum pH of 8 with adsorbent dose of 2.0 g at a temperature of 50°C gave good results of Zinc oxide nanoparticles removal. The equilibrium data for both sorbate solutions fitted well for both Langmuir and Freundlich isotherm models. From the Langmuir model, ECSH recorded greater sorption capacity of 0.2 mg/g and 0.6 mg/g for laboratory and commercial synthesized Zinc oxide nanoparticles respectively. The kinetic studies showed pseudo-second order model as the best fitted for the sorption of Zinc oxide nanoparticles for both laboratory and commercial Zinc oxide nanoparticles.","PeriodicalId":14603,"journal":{"name":"Iranian Journal of Materials Science and Engineering","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2020-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49532727","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}

引用次数: 1

Quenching of High Entropy Alloys after Annealing 高熵合金退火后的淬火

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Iranian Journal of Materials Science and Engineering Pub Date : 2020-12-10 DOI: 10.22068/IJMSE.17.4.130

E. Abbasi, K. Dehghani, T. Niendorf, S. Sajadifar

引用次数: 0

Densification and Shape Distortion of the Al-Cu-Mg Pre-alloyed Powder Compact in Supersolidus Liquid Phase Sintering Process Al-Cu-Mg预合金粉末在超固相液相烧结过程中的致密化和形状变形

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Iranian Journal of Materials Science and Engineering Pub Date : 2020-12-10 DOI: 10.22068/IJMSE.17.4.87

H. Momeni, S. Shabestari, S. Razavi

引用次数: 5

A Novel Porous Graphene Scaffold Prepared Using Freeze-drying Technique for Orthopedic Approaches: Fabrication and Buckling Simulation Using GDQ Method 冷冻干燥法制备新型骨科多孔石墨烯支架——GDQ方法的制备和屈曲模拟

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Iranian Journal of Materials Science and Engineering Pub Date : 2020-12-10 DOI: 10.22068/IJMSE.17.4.62

Shahin Foroutan, M. Hashemian, A. Khandan

引用次数: 13

Anisotropy of Fractal Dimensions of Fractures and Loading Curves of Steel Samples During Impact Bending 钢试样冲击弯曲断裂分形维数与加载曲线的各向异性

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Iranian Journal of Materials Science and Engineering Pub Date : 2020-12-10 DOI: 10.22068/IJMSE.17.4.142

V. Usov, M. Rabkina, N. Shkatulyak, E. Savchuk, O. Shtofel

{"title":"Anisotropy of Fractal Dimensions of Fractures and Loading Curves of Steel Samples During Impact Bending","authors":"V. Usov, M. Rabkina, N. Shkatulyak, E. Savchuk, O. Shtofel","doi":"10.22068/IJMSE.17.4.142","DOIUrl":"https://doi.org/10.22068/IJMSE.17.4.142","url":null,"abstract":"This study aims to establish the correlation between the impact strength and texture, fractal dimensions of fractures (Df), fractal dimensions (DC) obtained from load-time diagrams P(τ) reflecting the applied load (P) dependence on time (τ) during the Charpy impact test of 20K steel at various temperatures as well as the comparison of the abovementioned fractal dimensions. The tests were carried out on a vertical impact testing machine with a multi-channel system for high-speed registration of forces and strains, as well as a heating and cooling system for samples in a wide temperature range. The load vs. time (load dependence on time) diagrams were obtained at an impact velocity of V0 = 4.4 m/s at temperatures of -50, +20, + 50С. The Charpy standard samples of 20K steel (analog to DIN17175, class St45.8) were cut in various directions out of a 12 mm thick the destroyed tank shell of a distillation column for oil refining. It was established that the behavior of both the abovementioned fractal dimensions depending on the cutting direction and test temperature coincides qualitatively. The trend of decreasing in fractal dimension with a more viscous nature of fracture was found. The effect of texture is discussed.","PeriodicalId":14603,"journal":{"name":"Iranian Journal of Materials Science and Engineering","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2020-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42934660","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}

引用次数: 1