Journal of Materials and Polymer Science最新文献_第2页

In Situ Synthesis of Polyaniline Nanohybrid and Formulation of Polyaniline/ Carboxymethyl cellulose/Ethylene Glycol Nanocomposite: Study of its Conducting and Antibacterial Properties 聚苯胺纳米杂化物的原位合成及聚苯胺/羧甲基纤维素/乙二醇纳米复合材料的制备：导电性和抗菌性研究

Journal of Materials and Polymer Science Pub Date : 2023-11-20 DOI: 10.47485/2832-9384.1041

{"title":"In Situ Synthesis of Polyaniline Nanohybrid and Formulation of Polyaniline/ Carboxymethyl cellulose/Ethylene Glycol Nanocomposite: Study of its Conducting and Antibacterial Properties","authors":"","doi":"10.47485/2832-9384.1041","DOIUrl":"https://doi.org/10.47485/2832-9384.1041","url":null,"abstract":"Polyaniline (PANI) has received great attention as a conducting polymer from researchers in the field of organic synthesis and development of conducting nanocomposite polymer technology for superconductors. Different methods of PANI synthesis are being sought for the obtainment of electrically robust PANI composites for electronic and other useful applications. Different inorganic matrices have been considered for this purpose. This study attempts to prepare PANI In situ on arginine-modified nanoclay template by chemical oxidation polymerization. Further, the PANI/Arginine-modified nanoclay was used to prepare PANI/Arginine-Nanoclay/Carboxymethyl cellulose/Ethylene glycol conducting film with robust electric conductivity (EC). Electrical conductivities, anti-bacterial evaluation, Fourier-transform infrared spectroscopy (FT-IR), thermogravimetry analysis (TGA), differential thermogravimetry analysis (DTG) and Scanning Electron Microscopy (SEM) were used for the characterization studies and property evaluation. The electrical conductivities of PANI/Arginine-Nanoclay/Carboxymethyl cellulose/Ethylene glycol nanocomposite film reached 1900 S/Cm. FT-IR data, 3304–3196, 2926–2828, 2200–2022, 1733, 1620 and 1052 cm-1 respectively, confirmed the presence of organic intercalates, CMC, quinoid and benzenoid rings of PANI, and the inorganic nanoclay matter in the nanocomposite film. SEM revealed the presence of spine-like nanoflowers with elongated and expanded particle agglomerations. Thermal stability of the prepared nanocomposite thin film reached 700oC. The zone of inhibition ranged from 24-36 mm against S. typhi, E. coli and S. aureus. In conclusion, PANI nanocomposite thin conducting films had robust EC and antibacterial properties. In addition, the In-situ synthesis of PANI on Arginine-modified nanoclay platform aided the electric conductivity of the nanocomposite system.","PeriodicalId":372397,"journal":{"name":"Journal of Materials and Polymer Science","volume":"136 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139259632","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: 0

Plane Strain State of Composite Material Reinforced by Two Rows of Crystalline Fibres in Dynamic Elastic-Plastic Formulation 双排晶体纤维增强复合材料在动态弹塑性配方中的平面应变状态

Journal of Materials and Polymer Science Pub Date : 2023-07-11 DOI: 10.47485/2832-9384.1034

Vladislav Bogdanov

{"title":"Plane Strain State of Composite Material Reinforced by Two Rows of Crystalline Fibres in Dynamic Elastic-Plastic Formulation","authors":"Vladislav Bogdanov","doi":"10.47485/2832-9384.1034","DOIUrl":"https://doi.org/10.47485/2832-9384.1034","url":null,"abstract":"A generalized approach was developed for solving contact problems in a dynamic elastic-plastic formulation. For the design of composite and reinforced materials, a technique for solving dynamic contact problems in more adequate an elastic-plastic mathematical formulation is used. To consider the physical nonlinearity of the deformation process, the method of successive approximations is used, which makes it possible to reduce the nonlinear problem to a solution of the sequences of linear problems. In contrast to the traditional plane strain, when one normal stress is equal to a certain constant value, for a more accurate description of the deformation of the sample, taking into ac-count the possible increase in longitudinal elongation, we present this normal stress as a function that depends on the parameters that describe the bending of a prismatic body that is in a plain strain state. The problem of a plane strain state of a beam made from the composite reinforced one-layer material is being solved. The reinforced or armed composite material consists of two materials: the main material of glass and two rows of the reinforcing crystalline fourteen fibres of basalt. Glass has high strength and is not affected by the processes of aging of the material, corrosion, and creep. In addition, this material is cheap and widely available. The reinforced composite beam is rigidly linked to an absolutely solid base and on which an absolutely solid impactor acts from above in the centre on a different size of the area of initial contact.","PeriodicalId":372397,"journal":{"name":"Journal of Materials and Polymer Science","volume":"20 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139360388","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: 0

Plane Strain State of Four-Layers Composite Reinforced Body in Dynamic Elastic-Plastic FormulationAuthors: Vladislav Bogdanov 动态弹塑性公式中四层复合增强体的平面应变状态

Journal of Materials and Polymer Science Pub Date : 2023-06-06 DOI: 10.47485/2832-9384.1032

Vladislav Bogdanov

{"title":"Plane Strain State of Four-Layers Composite Reinforced Body in Dynamic Elastic-Plastic Formulation\u0000Authors: Vladislav Bogdanov","authors":"Vladislav Bogdanov","doi":"10.47485/2832-9384.1032","DOIUrl":"https://doi.org/10.47485/2832-9384.1032","url":null,"abstract":"The design of composite and reinforced or armed materials is a requirement of the modern level of production and life. In previous works (Bogdanov, 2022; Bogdanov, 2022; Bogdanov, 2022; Bogdanov, 2022), the plane problems of non-stationary interaction of a bullet-type impactor with the upper surface of a composite reinforced two-layers base, which consists of an upper thin layer of steel and a lower main layer of glass, was investigated. It is of interest to study the question of how a composite material composed of several two-layers composite bases laid on top of each other and rigidly bonded to each other will behave. In this work, we study the non-stationary interaction of a striker and a four-layers composite material reinforced with two thin steel layers. The four-layers base is obtained from two identical two-layers bases rigidly linked to each other. Such a four-layer material along its lower surface is rigidly linked to an absolutely hard half-space. The main layers of the material consist of glass. The use of glass in composites is promising due to the fact that glass is a durable, cheap, widespread material that does not corrode, and its strength properties do not degrade as a result of aging, creep like other materials, especially metals. The problem of glass brittleness is overcome by hard contact between the layers. In this case, the tops of micro cracks, micro pores on the surfaces of glass and steel are immobilized and do not propagate into the layers. An absolutely solid impactor acts from above in the centre on a small area of initial contact. The problem of a plane strain state of a beam made from the composite reinforced four layers material is being solved. A technique for solving dynamic contact problems in a dynamic elastic-plastic mathematical formulation is used. To consider the physical nonlinearity of the deformation process, the method of successive approximations is used, which makes it possible to reduce the nonlinear problem to a solution of the sequences of linear problems.","PeriodicalId":372397,"journal":{"name":"Journal of Materials and Polymer Science","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115807729","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: 0

Effect of Compressive Loads on the Air-Permeability kT of Concrete 压缩荷载对混凝土透气性kT的影响

Journal of Materials and Polymer Science Pub Date : 2023-05-24 DOI: 10.47485/2832-9384.1031

R. J. Torrent, M. Paderi, C. Paglia

{"title":"Effect of Compressive Loads on the Air-Permeability kT of Concrete","authors":"R. J. Torrent, M. Paderi, C. Paglia","doi":"10.47485/2832-9384.1031","DOIUrl":"https://doi.org/10.47485/2832-9384.1031","url":null,"abstract":"Since long it has been claimed that the departure from linearity of the σ-ε relation for concrete, up to failure under compression, is the result of cracks formation, first along the aggregate-paste interface, which later bridge the aggregates until, at around 75-80% of the maximum load (critical stress level), the matrix cracks become unstable, such that if that load is sustained, fracture will happen after a certain period (due to tertiary creep). This fact has been verified measuring volumetric strains, acoustic emission and ultrasound. The presence, growth and opening of such cracks must have an effect on the permeability of concrete, which was confirmed by water- and gas-permeability tests. The phenomenon was also studied applying a standard NDT method for air-permeability, based on a double-chamber vacuum cell, same as applied in the here reported research. This paper reports results of air-permeability kTof concrete cubes and half-cubes subjected to the following loading conditions: unloaded, sustained loads of 30, 60 and 90% of the ultimate load (measuring kT under the applied static load and the residual value after removing it) and dynamically during a test with monotonically increasing load till failure. The results indicate that a certain degree of damage, reflected in an increase of kT, is noticeably already at a 30% load level, which increases with the level of applied load. The dynamic kTtests were somewhat erratic, possibly, depending on whether the damage happened near or away from the surface where kT was measured.","PeriodicalId":372397,"journal":{"name":"Journal of Materials and Polymer Science","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126914622","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: 0

High-Efficient Solar Cell Design Using Green Synthesized ZnO From Gundruk Using a Numerical Approach 绿色合成ZnO高效太阳能电池的数值设计

Journal of Materials and Polymer Science Pub Date : 2023-04-29 DOI: 10.47485/2832-9384.1030

Sagar Bhattarai

引用次数: 0

Plane Strain and Stress States of Two-Layer Composite Reinforced Body in Dynamic Elastic-Plastic Formulation 动态弹塑性公式中双层复合增强体的平面应变和应力状态

Journal of Materials and Polymer Science Pub Date : 2023-04-22 DOI: 10.47485/2832-9384.1029

V. Bogdanov

{"title":"Plane Strain and Stress States of Two-Layer Composite Reinforced Body in Dynamic Elastic-Plastic Formulation","authors":"V. Bogdanov","doi":"10.47485/2832-9384.1029","DOIUrl":"https://doi.org/10.47485/2832-9384.1029","url":null,"abstract":"For the design of composite and reinforced materials, a technique for solving dynamic contact problems in more precise an elastic-plastic mathematical formulation is used. To consider the physical nonlinearity of the deformation process, the method of successive approximations is used, which makes it possible to reduce the nonlinear problem to a solution of the sequences of linear problems. In contrast to the traditional plane strain, when one normal stress is equal to a certain constant value, for a more accurate description of the deformation of the sample, taking into account the possible increase in longitudinal elongation, we present this normal stress as a function that depends on the parameters that describe the bending of a prismatic body that is in a plain strain state. The problems of a plane strain and stress states of a beam made from the composite reinforced double-layer material is being solved. The reinforced or armed material consists of two layers: the upper (first) thin layer of solid steel and the lower (second) main layer of glass. Glass is a non-crystalline, often transparent amorphous solid that has widespread practical and technological use in the modern industry. Glass has high strength and is not affected by the processes of aging of the material, corrosion, and creep. In addition, this material is cheap and widely available. Glass can be strengthened, for example, in a melt quenching process. The reinforced composite beam is rigidly linked to an absolutely solid base and on which an absolutely solid impactor acts from above in the centre on a small area of initial contact.","PeriodicalId":372397,"journal":{"name":"Journal of Materials and Polymer Science","volume":"27 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131062693","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: 0

The Environmental Degradation of Cement-Based Materials Due to Alkali-Silica Reaction: Case Studies 碱-二氧化硅反应对水泥基材料的环境降解:案例研究

Journal of Materials and Polymer Science Pub Date : 2023-03-13 DOI: 10.47485/2832-9384.1028

{"title":"The Environmental Degradation of Cement-Based Materials Due to Alkali-Silica Reaction: Case Studies","authors":"","doi":"10.47485/2832-9384.1028","DOIUrl":"https://doi.org/10.47485/2832-9384.1028","url":null,"abstract":"The environmental degradation of infrastructures is widely widespread. Every material or combination of it is subjected to a specific type of deterioration, which can occur in combination with other damaging effects. Structures are subjected to physical, chemical, mechanical and biological attacks. The monitoring, the diagnostic and the restoration are expensive processes that often can be mitigated by a correct material planning and design. Concrete structures are affected by freeze / thaw attack, acid and water leaching and sulphate deterioration. Every mechanism takes place at different rates depending upon the concentration of the aggressive pollutants and the environmental parameters, such as the humidity and the temperature. Alkali-silica reaction is known to happen between the alkali content of the cementitious binders and the amorphous quartz-rich stone aggregates. It usually takes a relatively long time to occur. In this work, cableway piles exposed to adverse atmospheric condition on a mountain as well as a support wall of a freeway 80 meters high pile were investigated with respect to the microstructure, the residual expansion in a NaOH-rich solution and the damage. Expansive gel was found around some stone aggregates. This caused the formation of wide cracks. These latter created a net-like structure on the concrete surface and spalling of the concrete cover was observed. Immersion tests in an alkali-rich solution also exhibited a potential residual expansion of the concrete, which was in turn related to the microstructure and the mineralogy of the cementitious material. The humidity, the aggregates and the reactive alkalis interact on a longterm basis over 50 years and largely control the extension of the degradation. Even with widely opened cracks, the AAR reaction potential may not be still completely stopped. Repair mortar applied on concrete may act as a barrier against the reaction, but it is not be able to completely mitigate the AAR effect.","PeriodicalId":372397,"journal":{"name":"Journal of Materials and Polymer Science","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121102589","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: 0

Exploring Gallium Nitride as a Viable Replacement for High Power and Performance Semiconductors: A Comparative Study of Electrical Properties and Fabrication Techniques 探索氮化镓作为高功率和高性能半导体的可行替代品:电性能和制造技术的比较研究

Journal of Materials and Polymer Science Pub Date : 2023-03-06 DOI: 10.47485/2832-9384.1027

{"title":"Exploring Gallium Nitride as a Viable Replacement for High Power and\u0000 Performance Semiconductors: A Comparative Study of Electrical Properties\u0000 and Fabrication Techniques","authors":"","doi":"10.47485/2832-9384.1027","DOIUrl":"https://doi.org/10.47485/2832-9384.1027","url":null,"abstract":"The semiconductor industry is continuously seeking to develop more compact, faster, and less expensive transistors allowing for more power to be packed into the same chip. This requires the development of smaller and more efficient semiconductors that are currently in the range of around 5-7 nanometers each. However, the limitations of silicon, the leading semiconductor material, are becoming more apparent, prompting exploration of other compounds, with a very promising candidate being gallium nitride (GaN). This paper presents an overview of GaN-based high electron mobility transistors (HEMTs) and integrated circuits (ICs), which offer several advantages over silicon-based counterparts. GaN HEMTs have lower on-resistance, faster devices, less capacitance, and less power consumption allowing them to sustain higher voltages and faster current. Meanwhile, GaN-based ICs have the potential to improve the efficiency of power conversion systems and circuits due to their ability to integrate both power-level and signal-level devices on the same wafer. With GaN-based devices, power conversion can become more efficient and cost-effective, ushering a new era for power conversion.","PeriodicalId":372397,"journal":{"name":"Journal of Materials and Polymer Science","volume":"439 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122888355","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: 0

The Asphalt Rutting Within a Highway Tunnel A Case Study 公路隧道内沥青车辙的个案研究

Journal of Materials and Polymer Science Pub Date : 2023-02-27 DOI: 10.47485/2832-9384.1026

引用次数: 0

Foundations of Polymer Thermoelectronics. 聚合物热电子学基础“，”

Journal of Materials and Polymer Science Pub Date : 2023-02-20 DOI: 10.47485/2832-9384.1025

{"title":"Foundations of Polymer Thermoelectronics.","authors":"","doi":"10.47485/2832-9384.1025","DOIUrl":"https://doi.org/10.47485/2832-9384.1025","url":null,"abstract":"Building the foundations of polymer thermoelectronics became possible only after the correction of thermodynamic errors in traditional, semiconductor electronics. It was these errors that determined the saturation of its operating parameters of semiconductor electronic devices, in particular, the saturation of the maximum clock frequency of processors. But even if in semiconductors, although these thermodynamic errors manifested themselves not only in the instrumental, but also in the technological aspect, they did not prohibit semiconductor electronics themselves.\u0000\u0000Whereas, without eliminating thermodynamic errors, the technology of polymers itself made it possible to create only a limited range of materials with low electrical conductivity – materials with low leakage currents, and not polymers with different types of conductivity required for electronics and with given potential barriers for current carriers. In this work, it is shown that there are no fundamental prohibitions either on the creation of polymers with high conductivity, or on the creation of thermionic devices based on them. It’s just that ALL polymer physics is “stuck” on the use of flat electron orbitals, which Pauling introduced for “two-dimensional” graphite and for which he received the Nobel Prize. But, Pauling himself, as an honest scientist, having discovered his mistake, tried to correct it by introducing “curved” orbitals for graphite itself. Now, after the restoration of the Planck-Einstein Quantization, it is shown how to get the correct orbitals instead of the mystical Schrödinger wave functions [1, 2, 3].\u0000\u0000Stanislav Ordin, «Gaps and Errors of the Schrödinger Equation»», Journal of Materials and Polymer Science (J mate poly sci), 2022; 2(3): p. 1-6.\u0000Stanislav Vladimirovich Ordin, Book: “FOUNDATIONS OF Planck-Einstein Quantization (Thematic collection of recent studies reviewed in scientific journals).” LAP LAMBERT Academic Publishing, 2021, ISBN 978-620-4-21066-7, 110 pp.\u0000Stanislav Ordin, “Foundations of Quantization Principles”. Jenny Stanford Publishing Pte Ltd, 2023, 235 рр.","PeriodicalId":372397,"journal":{"name":"Journal of Materials and Polymer Science","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132616967","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