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OPTICAL PROPERTIES OF CARBON CONTAINING NANOCOMPOSITE FILMS BASED ON THE POLYSTYRENE-FULLERENE C60 SYSTEM 聚苯乙烯-富勒烯c60体系含碳纳米复合薄膜的光学性质
Q3 Engineering Pub Date : 2023-09-21 DOI: 10.31489/2023no3/27-34
G.E. Satayeva
Carbon-based nanocomposites have attracted significant attention due to their unique properties and potential for use in various technological applications. In this study, experimental investigations were conducted to determine the spectral properties of carbon-containing nanocomposite polymer films based on polystyrene (PS) with fullerene C60 nanoadditives. The results indicate that the incorporation of fullerene nanoparticles into the PS matrix enhances the optical properties of the material. Specifically, the optical density of the samples increases, the absorption coefficient increases, and the width of the bandgap decreases with an increase in carbon additive concentration. These findings suggest that fullerene-based nanocomposites are promising materials for optoelectronic and nanotechnological applications. The results of this work contribute to the growing body of research on carbon-based nanocomposites and their potential for use in a range of fields, including electronics, energy storage, and sensing applications. The enhanced optical properties of fullerene-based nanocomposites suggest that they may be particularly useful for developing novel optoelectronic devices and sensors. Overall, this study highlights the potential of fullerene-based nanocomposites as a versatile and promising material platform for various technological applications.
碳基纳米复合材料由于其独特的性能和在各种技术应用中的潜力而引起了人们的广泛关注。在本研究中,实验研究了含富勒烯C60的聚苯乙烯(PS)纳米复合聚合物薄膜的光谱特性。结果表明,在PS基体中加入富勒烯纳米粒子可以提高材料的光学性能。具体来说,随着碳添加剂浓度的增加,样品的光密度增加,吸收系数增加,带隙宽度减小。这些发现表明富勒烯基纳米复合材料在光电和纳米技术领域具有广阔的应用前景。这项工作的结果促进了碳基纳米复合材料的研究,以及它们在包括电子、储能和传感应用在内的一系列领域的潜在应用。富勒烯基纳米复合材料增强的光学性能表明,它们可能对开发新型光电器件和传感器特别有用。总的来说,这项研究突出了富勒烯基纳米复合材料作为各种技术应用的通用和有前途的材料平台的潜力。
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引用次数: 0
CONFORMATIONAL STRUCTURE OF AN ADSORBED POLYELECTROLYTE ON A NANOPARTICLE WITH LOW CONDUCTIVITY IN AN ALTERNATING ELECTRIC FIELD 在交变电场中低电导率纳米颗粒上吸附的聚电解质的构象结构
Q3 Engineering Pub Date : 2023-09-21 DOI: 10.31489/2023no3/5-19
M.G. M.G. Kucherenko
An analytical form of the model of the quasi-equilibrium conformational structure of the units of the Gaussian chain of a polyelectrolyte adsorbed on a nanospheroid witha relatively low electrical conductivity (undoped semiconductor) polarized in an external harmonically varying quasi-static electric field with a frequency significantly lower than the plasma frequency of the nanoparticle material is proposed. Variants ofthe model are discussed that go beyond the scope of the quasi-static approximation, i.e., take into account the effects of delay, the manifestation of which will be noticeable in the case of sufficiently extended nanostructures. Electrically induced conformational changes of generally neutral polyampholytic polypeptides on the surface of a spherical germanium nanoparticle in a static or alternating external electric field have been studied by molecular dynamics. In a static electric field, in the case of asmall distance between the charged units in the polyampholyte, a large number of macrochain loops were formed, elongated in the direction of the polarization axis of the nanoparticle. If the distance between the oppositely charged amino acid residues of the polypeptide exceeded the diameter of the nanoparticle, the charged units were mainly localized in the oppositely charged subpolar regions of the polarized germanium nanoparticle. In an alternating electric field, a girdle polyampholyte edge was formed in the equatorial region of the nanoparticle, the macrochain links of which were desorbed from the surface with an increase in the amplitude of the polarizing alternating electric field.
本文提出了吸附在电导率相对较低的纳米球体(未掺杂半导体)上的聚电解质高斯链单元的准平衡构象结构模型的解析形式,该模型在明显低于纳米颗粒材料等离子体频率的外部谐波变化的准静态电场中极化。讨论了超出准静态近似范围的模型变体,即考虑了延迟的影响,其表现形式在足够扩展的纳米结构的情况下将是明显的。本文用分子动力学方法研究了球形锗纳米颗粒表面中性多肽在静电或交变电场作用下的电诱导构象变化。在静电场中,在聚两性聚合物中带电单元之间距离较小的情况下,形成了大量的大链环,并沿着纳米粒子的极化轴方向拉长。如果多肽的氨基酸残基之间的距离超过纳米粒子的直径,则带电单元主要集中在极化锗纳米粒子的亚极性区。在交变电场作用下,纳米颗粒的赤道区形成带状多极性边缘,随着极化交变电场振幅的增大,纳米颗粒表面的大链链被解吸。
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引用次数: 0
ANALYSIS OF CHANGES IN FRACTAL, STATISTICAL AND KINETIC PARAMETERS DURING THE HETEROANNIHILATION OF PARTICLES ON THE SIMULATED STRUCTURALLY INHOMOGENEOUS SURFACES 模拟结构不均匀表面上粒子杂灭过程中分形、统计和动力学参数的变化分析
Q3 Engineering Pub Date : 2023-09-21 DOI: 10.31489/2023no3/80-87
S.G. S.G. Karstina
To investigate the mechanisms of interaction of particles on structurally inhomogeneous surfaces, the influence of surface morphology, distribution of interacting particles and their mobility on the mechanisms of ongoing processes, various modeling approaches are widely used. The paper presents the results of comparison of kinetic, statistical and fractal parameters changing in the process of heteroannihilation of particles distributed chaotically and multifractally on a simulated structurally inhomogeneous surface. To simulate the complex behavior of particles in time and space during heteroannihilation with changes in their mobility across the surface and various interaction probabilities, a class IV probabilistic cellular automaton method was applied. Based on the simulation results, it is shown that the interaction probability, initial distribution, and mobility of interacting particles influence the formation of kinetic modes at different iterations of the heteroannihilation process. It was found that a decrease in the mobility of interacting particles leads to a longer preservation of spatial heterogeneity in the system. An increase in the mobility of interacting particles and the probability of their interaction increases the rate of change in the fractal dimensionality and the rate coefficients of heteroannihilation kinetics. Decrease of fractal dimensionality during heteroannihilation is accompanied by decrease of asymmetry and increase of excess characterizing shape and degree of symmetry of distribution of interacting particles. At the same time, large values of asymmetry and excess indicate a significant deviation from the normal distribution of interacting particles on the surface.
为了研究颗粒在结构不均匀表面上的相互作用机制、表面形貌、相互作用颗粒的分布及其迁移率对正在进行的过程机制的影响,各种建模方法被广泛使用。本文比较了在模拟的结构不均匀表面上混沌分布和多重分形分布的粒子的异湮灭过程中动力学、统计和分形参数的变化。为了模拟粒子在异湮灭过程中随其表面迁移率和不同相互作用概率变化的复杂时空行为,采用了一类概率元胞自动机方法。仿真结果表明,在不同的异湮灭过程中,相互作用粒子的初始分布、相互作用概率和迁移率影响着动力学模式的形成。研究发现,相互作用粒子迁移率的降低导致系统中空间异质性的保存时间更长。相互作用粒子的迁移率和相互作用概率的增加增加了分形维数的变化率和异湮灭动力学的速率系数。杂湮灭过程中分形维数的减小伴随着不对称性的减小和过剩量的增加,表征了相互作用粒子分布的形状和对称程度。同时,不对称和过剩的大值表明表面上相互作用粒子的正态分布有明显的偏差。
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引用次数: 0
PROCESSES OF DEFECT FORMATION IN SILICON DIFFUSIONALLY DOPED WITH PLATINUM AND IRRADIATED WITH PROTONS 铂扩散掺杂和质子辐照硅的缺陷形成过程
Q3 Engineering Pub Date : 2023-09-21 DOI: 10.31489/2023no3/35-42
Sh.B. Utamuradov
In this work, we studied the effect of technological regimes and proton implantation on the processes of defect formation in single-crystal n-type silicon (n-Si) doped with platinum using the method of impedance spectroscopy. It has been established that radiation-induced changes in the electrical conductivity of silicon depend significantly on the technological regimes of doping with impurities in silicon. Hodographs show that doping with platinum leads to a decrease in the electrical resistance of silicon samples. Irradiation with 2 MeV protons at a dose of 5.1 × 1014 particles / cm2 leads to a significant (2-3 times) increase in the electrical resistance of the silicon samples under study. It is concluded that the relatively high resistance to radiation exposure (resistance change of no more than 16%: from 55 kΩ to 65 kΩ as a result of ion implantation) of samples doped at 1200°C is presumably due to a higher concentration of impurity ions (platinum) in the samples volume compared to 1100°C.
本文采用阻抗谱法研究了工艺制度和质子注入对掺杂铂单晶n型硅(n-Si)缺陷形成过程的影响。已经确定,辐射引起的硅电导率的变化在很大程度上取决于硅中掺杂杂质的技术制度。全息图显示,掺杂铂会导致硅样品的电阻降低。在5.1 × 1014粒子/ cm2的剂量下,2 MeV质子的辐照导致所研究的硅样品的电阻显著(2-3倍)增加。由此得出结论,在1200℃下掺杂的样品的相对较高的辐射暴露电阻(由于离子注入,电阻变化不超过16%:从55 kΩ到65 kΩ)可能是由于与1100℃相比,样品体积中杂质离子(铂)的浓度更高。
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引用次数: 0
INVESTIGATION OF AERODYNAMIC THRUST FORCE OF THE WIND POWER PLANT WITH COMBINED BLADES 组合叶片风力发电机组气动推力的研究
Q3 Engineering Pub Date : 2023-06-21 DOI: 10.31489/2022no2/65-69
A. Tleubergenova
In this article, a wind power plant with a horizontal axis of rotation operating under conditions of variable wind speeds is considered. For this purpose, a mock-up of a wind power plant with rotating combined blades was made. During the experiments, the angle of the fixed blade relative to the cylinder changed from 0° to 60°, in increments of 15 °. The air flow rate varied, from 3 to 12 m/s. The analysis of the results of the experiment on the change of the rotation frequency from the air flow velocity of the wind power plant is carried out. When changing the position of the fixed blade (0°, 15°, 30°, 45°, 60°) the value of the thrust force changes relative to the air flow in direct proportion. As the air flow velocity increases, the rotation frequency of the wind wheel increases linearly. It was found that when the fixed blade was positioned at an angle of 60 degrees, with a maximum air flow velocity of 12 m/s, the thrust force reached 2.06 N. Due to the combined use of two lifting forces, such as a cylinder and a fixed blade, increased thrust values are observed.The results obtained are useful when creating prototypes of a wind power plant with combined blades.
本文考虑了一个在可变风速条件下运行的具有水平旋转轴的风力发电厂。为此,制作了一个带有旋转组合叶片的风力发电厂模型。在实验过程中,固定叶片相对于圆柱体的角度从0°变为60°,增量为15°。空气流速在3到12米/秒之间变化。对风力发电机组转速随风速变化的实验结果进行了分析。当改变固定叶片的位置(0°、15°、30°、45°、60°)时,推力值相对于气流成正比变化。随着空气流速的增加,风轮的旋转频率线性增加。研究发现,当固定叶片以60度的角度定位,最大空气流速为12 m/s时,推力达到2.06 N。由于两种升力(如圆柱体和固定叶片)的组合使用,观察到推力值增加。所获得的结果在创建具有组合叶片的风力发电厂原型时是有用的。
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引用次数: 0
FEATURES OF MECHANICS DESTRUCTION TRIBOUNITSAT DIFFICULT DYNAMIC LOADING 力学破坏摩擦学单元的特点在困难的动态载荷下
Q3 Engineering Pub Date : 2023-06-21 DOI: 10.31489/2023no2/99-105
V. Tsyganov
The mechanics of contact destruction tribounits at a friction in the conditions of difficult dynamicloading is considered. Possibilityof mathematical description of complex damage knots friction is shown, intensities of wear taking into account the features of forming superficial layer at a contact.Methodology of calculation superficial durability and longevity oftribounits is presented and the examples of practical estimation of this interdependence are shown.The model of destruction surface at a friction with a different dynamic loadingis offered, methods of estimation wearproofness on the change of the structural state of superficial layer by a tribospectral method and the electron work function.
考虑了在困难的动态载荷条件下摩擦时接触破坏摩擦单元的力学问题。显示了复杂损伤结摩擦的数学描述的可能性,磨损强度考虑了在接触处形成表层的特征。介绍了核糖单元表面耐久性和寿命的计算方法,并举例说明了这种相互依赖性的实际估计。提出了不同动载荷下摩擦破坏面的模型,用摩擦谱法和电子功函数估计表层结构状态变化的耐磨性的方法。
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引用次数: 0
STUDY OF RADIO TRANSPARENCY AND DIELECTRIC PERMITTIVITYOF GLASS-AND ARAMID EPOXY COMPOSITES 玻璃-芳纶环氧复合材料的无线电透明度和介电常数研究
Q3 Engineering Pub Date : 2023-06-21 DOI: 10.31489/2023no2/70-78
А.М. Yermakhanova
Aramide-epoxy-filled composites are widely used for manufacturing in the structures of modern aerospace vehicles. Not only do they have excellent mechanical properties, but they are also radio-transparent materials for wave transmission. In this work, an epoxy-filled composite and a fibreglass were made by vacuum infusion for a comparative study on radio transparency and dielectric permittivity. The radio transparency of the materials analyzed has been evaluated by measuring in free space in the frequency ranges of 1-6 GHz. According to the results of radio transparency, aramide-epoxy-filled composite suffers less electromagnetic wave losses than in fibreglass. When measuring the dielectric permittivity of the aramide-epoxy-filled composites, a low average value of 2.874 has been set, whereas for the fibreglass is defined at 4.
芳酰胺-环氧树脂填充复合材料广泛用于制造现代航空航天飞行器的结构。它们不仅具有优异的机械性能,而且还是用于波传输的无线电透明材料。在这项工作中,通过真空灌注制备了环氧树脂填充复合材料和玻璃纤维,对无线电透明度和介电常数进行了比较研究。通过在1-6 GHz频率范围内的自由空间中测量,对所分析材料的无线电透明度进行了评估。根据无线电透明性的结果,芳族聚酰胺-环氧树脂填充复合材料比玻璃纤维遭受更少的电磁波损失。当测量芳族聚酰胺-环氧树脂填充复合材料的介电常数时,设定了2.874的低平均值,而玻璃纤维的介电系数定义为4。
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引用次数: 0
N ASSESSING THE EFFECTIVENESS OF HYBRID SOLAR COLLECTORS SCHEME INIRAQ'S ENVIRONMENT 评估混合太阳能集热器方案在伊拉克环境中的有效性
Q3 Engineering Pub Date : 2023-06-21 DOI: 10.31489/2023no2/57-64
Jaddoa Ameer A.
An evaluation of the performance of the Iraqi environments in terms of electrical, thermal and exergy efficiency is introduced in this study. The research is carried out in May 2022, in the Baghdad metropolis. The extraction process of heat from the photovoltaic units which arises from the coolant liquid mass flow rate deem as an essential point. The experimental studies were implemented by absorbing heat energy behind from the photovoltaic cell's surface in insulated conditions and using a cooled water unit. The results indicated that at a mass inflow rate of 0.2 kg/sec, the maximum average total efficiency of the system was recorded 22%. As a result, it is advised that to reduce the payback interval, it is possible to design efficient solar photovoltaic–thermal systems to promote the whole system's efficiency and lower the payback interval.
本研究介绍了伊拉克环境在电、热和火用效率方面的性能评估。这项研究于2022年5月在巴格达大都市进行。从光伏单元中提取由冷却剂液体质量流量产生的热量的过程被认为是一个关键点。实验研究是通过在绝缘条件下吸收光伏电池表面的热能并使用冷水机组进行的。结果表明,在0.2千克/秒的质量流入速率下,系统的最大平均总效率记录为22%。因此,为了缩短投资回收期,可以设计高效的太阳能光伏-热力系统,以提高整个系统的效率并降低投资回收期。
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引用次数: 0
ANALYSIS OF SYNTHETIC RENEWABLE METHANE PRODUCTION TECHNOLOGIES FOR IMPLEMENTATION IN UKRAINE 分析在乌克兰实施的合成可再生甲烷生产技术
Q3 Engineering Pub Date : 2023-06-21 DOI: 10.31489/2023no2/41-45
V. Klimenko
Methanation technologies for the production of synthetic renewable methane are considered. The possibilities of applying the methods of catalytic and biological methanation are analyzed. The implementation of methanation technologies is carried out with the efficient use of renewable energy sources. The Power to Gas concept for the generation of synthetic renewable methane in different countries are considered. Some results of studies of methanation processes, obtained in ongoing projects, are presented. World experience in the implementation of methanation technologies for the production of synthetic renewable methane can be an example for Ukraine.
考虑了用于生产合成可再生甲烷的甲烷化技术。分析了催化法和生物甲烷化法应用的可能性。甲烷化技术的实施是在有效利用可再生能源的情况下进行的。考虑了不同国家生产合成可再生甲烷的电力到天然气概念。介绍了正在进行的项目中对甲烷化过程的一些研究结果。世界在使用甲烷化技术生产合成可再生甲烷方面的经验可以成为乌克兰的一个例子。
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引用次数: 0
THE USE OF ALTERNATIVE ENERGY SOURCES FOR THE OPERATION OF ENGINEERING SYSTEMS OF DETACHED CONSUMERS 使用替代能源的工程系统的操作独立的消费者
Q3 Engineering Pub Date : 2023-06-21 DOI: 10.31489/2023no2/46-56
R. Usenkov
The operation of many of the engineering systems that are necessary for the functioning of a detached residential building depends on specific sources of alternative energy, the use of which can significantly reduce the consumption of traditional fossil energy resources. A review of scientific works devoted to the operation of engineering systems using alternative energy sources is given. Several schemes of power equipment have been developed to obtain thermal and electrical energy supplied to isolated consumers. When designing a fixed technical solar system using solar radiation for operation, the locations of all power equipment, the solar receiver pitch on the roof of the building and the values of its optimal angle of inclination to the horizon were determined. A scheme of a small transportable hydroelectric power plant has been developed, which generates electric energy using the pressure created by the flow of water. A thermal refrigeration unit is designed, which uses the heat of the air removed from the animal stall to heat the heated medium.
独立住宅建筑功能所必需的许多工程系统的运行取决于替代能源的特定来源,使用替代能源可以显着减少传统化石能源的消耗。综述了利用替代能源的工程系统运行的科学工作。已经开发了几种电力设备方案,以获得提供给孤立用户的热能和电能。在设计一个利用太阳辐射运行的固定式技术太阳能系统时,确定了所有动力设备的位置、建筑屋顶上太阳能接收器的间距及其与地平线的最佳倾角值。一种小型移动式水力发电厂的方案已经被开发出来,它利用水流产生的压力来发电。设计了一种热制冷装置,它利用从畜栏中取出的空气的热量来加热被加热的介质。
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引用次数: 0
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Eurasian Physical Technical Journal
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