World Academy of Science, Engineering and Technology, International Journal of Chemical, Molecular, Nuclear, Materials and Metallurgical Engineering最新文献
Pub Date : 2023-11-02DOI: 10.37394/232031.2023.2.11
Tarasova N. P., Zanin A. A., Krivoborodov E. G.
The article discusses the results of the synthesis of polymer phosphorus from the elemental phosphorus in the aqueous medium under the electron-beam irradiation. The structure of the obtained high-molecular phosphorus-containing compounds was analyzed and compared with samples of commercially available red phosphorus by mass spectrometry with matrix-activated laser desorption/ionization.
{"title":"Electron-beam Initiated Polymerization of Elemental Phosphorus","authors":"Tarasova N. P., Zanin A. A., Krivoborodov E. G.","doi":"10.37394/232031.2023.2.11","DOIUrl":"https://doi.org/10.37394/232031.2023.2.11","url":null,"abstract":"The article discusses the results of the synthesis of polymer phosphorus from the elemental phosphorus in the aqueous medium under the electron-beam irradiation. The structure of the obtained high-molecular phosphorus-containing compounds was analyzed and compared with samples of commercially available red phosphorus by mass spectrometry with matrix-activated laser desorption/ionization.","PeriodicalId":23701,"journal":{"name":"World Academy of Science, Engineering and Technology, International Journal of Chemical, Molecular, Nuclear, Materials and Metallurgical Engineering","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135934322","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 : 2023-10-05DOI: 10.37394/232031.2023.2.10
Neama Ahmed Sobhy Ahmed
Direct polymerization of polyethylene glycol (PEG) in suspensions of Bentonite (Ben) was used for preparation of Ben-PEG composite. The prepared composite was characterized using field-effect scanning electron microscopy, surface area measurements, and X-ray diffraction. In the XRD pattern there is a change in peak intensity. But New peaks appeared. This may be due to high dispersion of particles of polymer in the Ben matrix or low concentration of the modifying agent. The crystallinity absence after loading the sorbent with cadmium and lead ions in the SEM measurement indicates that there was no crystalline phase after sorption. The optimal conditions for adsorption of Cd2+ and Pb2+ ions were found to be a PEG content of 0.2 % and a contact time of 150 min. The sorption experiments were performed under different operating variables, including, pH, adsorbent dose and initial concentration of metals. For both Cd2+ and Pb2+, Adsorption parameters were determined using both Langmuir and Freundlich isotherms, but the experimental data were better fitted to the Langmuir equation than to Freundlich equation. The adsorption equilibrium was described by the Langmuir model, which confirmed the presence of saturated mono-layer of adsorbent molecules on the adsorbent surface, that the energy of adsorption is constant. The potential of Ben-PEG composite for the removal of cadmium and lead from aqueous solution was substantiated.
{"title":"Study Of Using Bentonite – Poly Ethylene Glycol Composite for Metal Removal from Water","authors":"Neama Ahmed Sobhy Ahmed","doi":"10.37394/232031.2023.2.10","DOIUrl":"https://doi.org/10.37394/232031.2023.2.10","url":null,"abstract":"Direct polymerization of polyethylene glycol (PEG) in suspensions of Bentonite (Ben) was used for preparation of Ben-PEG composite. The prepared composite was characterized using field-effect scanning electron microscopy, surface area measurements, and X-ray diffraction. In the XRD pattern there is a change in peak intensity. But New peaks appeared. This may be due to high dispersion of particles of polymer in the Ben matrix or low concentration of the modifying agent. The crystallinity absence after loading the sorbent with cadmium and lead ions in the SEM measurement indicates that there was no crystalline phase after sorption. The optimal conditions for adsorption of Cd2+ and Pb2+ ions were found to be a PEG content of 0.2 % and a contact time of 150 min. The sorption experiments were performed under different operating variables, including, pH, adsorbent dose and initial concentration of metals. For both Cd2+ and Pb2+, Adsorption parameters were determined using both Langmuir and Freundlich isotherms, but the experimental data were better fitted to the Langmuir equation than to Freundlich equation. The adsorption equilibrium was described by the Langmuir model, which confirmed the presence of saturated mono-layer of adsorbent molecules on the adsorbent surface, that the energy of adsorption is constant. The potential of Ben-PEG composite for the removal of cadmium and lead from aqueous solution was substantiated.","PeriodicalId":23701,"journal":{"name":"World Academy of Science, Engineering and Technology, International Journal of Chemical, Molecular, Nuclear, Materials and Metallurgical Engineering","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134975881","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 : 2023-10-03DOI: 10.37394/232031.2023.2.8
Vigen Barkhudaryan
The influence of oligomers and polymers of ethylene glycols with a different molecular mass on the structural transformations of aqueous solutions of surfactant, sodium pentadecylsulfonate, studied by viscometry and light scattering methods depending on their content in the system. It established that ethylene glycol with a molecular mass of 2,000 and 40,000 does not affect the structure of the system. For ethylene glycol with a molecular mass of 4,000, 6,000, and 20,000, a clearly expressed complex course of the dependence of the intrinsic viscosity of the micelle system on the polymer content was established. It assumed that with the changes in the concentration of ethylene glycols in the system, micelles are compacted due to a change in the balance of hydrophobic-hydrophilic interactions. In parallel with the change in apparent micelle masses and asymmetry coefficients determined by the light scattering method, the intrinsic viscosity also changes depending on the system's composition. The practical application of this research is that it allows the performance properties of sodium pentadecyl sulfonate (SPDS) to be adjusted, thereby expanding and improving its applications.
{"title":"Effect of Oligomers and Polymers of Ethylene Glycols on Micellar Characteristics of Aqueous Solutions of Sodium Pentadectyl Sulfonate","authors":"Vigen Barkhudaryan","doi":"10.37394/232031.2023.2.8","DOIUrl":"https://doi.org/10.37394/232031.2023.2.8","url":null,"abstract":"The influence of oligomers and polymers of ethylene glycols with a different molecular mass on the structural transformations of aqueous solutions of surfactant, sodium pentadecylsulfonate, studied by viscometry and light scattering methods depending on their content in the system. It established that ethylene glycol with a molecular mass of 2,000 and 40,000 does not affect the structure of the system. For ethylene glycol with a molecular mass of 4,000, 6,000, and 20,000, a clearly expressed complex course of the dependence of the intrinsic viscosity of the micelle system on the polymer content was established. It assumed that with the changes in the concentration of ethylene glycols in the system, micelles are compacted due to a change in the balance of hydrophobic-hydrophilic interactions. In parallel with the change in apparent micelle masses and asymmetry coefficients determined by the light scattering method, the intrinsic viscosity also changes depending on the system's composition. The practical application of this research is that it allows the performance properties of sodium pentadecyl sulfonate (SPDS) to be adjusted, thereby expanding and improving its applications.","PeriodicalId":23701,"journal":{"name":"World Academy of Science, Engineering and Technology, International Journal of Chemical, Molecular, Nuclear, Materials and Metallurgical Engineering","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135695848","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}
The study is devoted to identifying the ways in which captan can affect humans, including through the atmosphere and through food. The objects of the research were the following: the active substance (captan), air and a vegetable, namely sweet pepper. The equipment used included a chromato-mass-spectrometer «Agilent 5977А» with a gas chromatograph «Agilent Technologies-7890В», a liquid chromatograph «Agilent 1260» with a diode array detector and a liquid chromato-mass-spectrometer ExionLCAD/Qtrap 6500+. The method of gasliquid chromatography did not provide reproducible results, due to an unstable connection. Using techniques developed for the identification of captan in air, captan was determined using real samples collected during agricultural work. Captan content was reliably measured using samples taken from the air of the working environment (0,2 – 0,75 mg·m-3) and from the skin of operational staff (0,2 – 0,4 mg, using·wipes-1). In determining captan content in fruit and vegetable products, new and detailed methodological approaches were developed in order to minimise the matrix effect: a calibration curve was created based on the control matrix sample. The detection limit for captan was established at 0,01 mg·kg-1. In the analysis of actual sweet pepper samples, captan content was found to be below the detection limit.
{"title":"Captan: Problems Associated with its Identification in Environmental Materials and Food Products. Potential Solutions","authors":"Nataliya Fedorova, Irina Bereznyak, Lydia Bondareva","doi":"10.37394/232031.2023.2.9","DOIUrl":"https://doi.org/10.37394/232031.2023.2.9","url":null,"abstract":"The study is devoted to identifying the ways in which captan can affect humans, including through the atmosphere and through food. The objects of the research were the following: the active substance (captan), air and a vegetable, namely sweet pepper. The equipment used included a chromato-mass-spectrometer «Agilent 5977А» with a gas chromatograph «Agilent Technologies-7890В», a liquid chromatograph «Agilent 1260» with a diode array detector and a liquid chromato-mass-spectrometer ExionLCAD/Qtrap 6500+. The method of gasliquid chromatography did not provide reproducible results, due to an unstable connection. Using techniques developed for the identification of captan in air, captan was determined using real samples collected during agricultural work. Captan content was reliably measured using samples taken from the air of the working environment (0,2 – 0,75 mg·m-3) and from the skin of operational staff (0,2 – 0,4 mg, using·wipes-1). In determining captan content in fruit and vegetable products, new and detailed methodological approaches were developed in order to minimise the matrix effect: a calibration curve was created based on the control matrix sample. The detection limit for captan was established at 0,01 mg·kg-1. In the analysis of actual sweet pepper samples, captan content was found to be below the detection limit.","PeriodicalId":23701,"journal":{"name":"World Academy of Science, Engineering and Technology, International Journal of Chemical, Molecular, Nuclear, Materials and Metallurgical Engineering","volume":"110 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135647837","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 : 2023-09-18DOI: 10.37394/232031.2023.2.7
Billel Cheniti, Brahim Belkessa, Bouzid Maamache, Naima Ouali, Viktor Puchý, Pavol Hvizdoš
In this work, WC-Co cermet was successfully joined to AISI 304L stainless steel using flash spark plasma sintering (FSPS) technique under a constant load of 5 MPa with ultra-rapid holding times. The results revealed that increasing the holding time to 12s resulted in massive interfacial deformations accompanied with an important diffusion activity of Co, Ni and Fe across the interface. Toughness measurement of WC-Co cermet at the vicinity of the bonding interface was assessed using Vickers indentation fracture (VIF) method. The results revealed that the mechanical properties of the bonded joints deteriorated with increasing holding time, leading to increased brittleness. This outcome was observed despite the significant inter-diffusion that occurred between the WC-Co cermet and the constituents of the 304L steel
{"title":"Interfacial Evolution of WC-Co/AISI 304L Diffusion Bonded Joint Obtained by Flash SPS Technique","authors":"Billel Cheniti, Brahim Belkessa, Bouzid Maamache, Naima Ouali, Viktor Puchý, Pavol Hvizdoš","doi":"10.37394/232031.2023.2.7","DOIUrl":"https://doi.org/10.37394/232031.2023.2.7","url":null,"abstract":"In this work, WC-Co cermet was successfully joined to AISI 304L stainless steel using flash spark plasma sintering (FSPS) technique under a constant load of 5 MPa with ultra-rapid holding times. The results revealed that increasing the holding time to 12s resulted in massive interfacial deformations accompanied with an important diffusion activity of Co, Ni and Fe across the interface. Toughness measurement of WC-Co cermet at the vicinity of the bonding interface was assessed using Vickers indentation fracture (VIF) method. The results revealed that the mechanical properties of the bonded joints deteriorated with increasing holding time, leading to increased brittleness. This outcome was observed despite the significant inter-diffusion that occurred between the WC-Co cermet and the constituents of the 304L steel","PeriodicalId":23701,"journal":{"name":"World Academy of Science, Engineering and Technology, International Journal of Chemical, Molecular, Nuclear, Materials and Metallurgical Engineering","volume":"101 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135153582","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 : 2023-09-18DOI: 10.37394/232031.2023.2.6
A. A. Kipouros, G. Jarjoura, G. J. Kipouros
Most of the phase diagrams reported in the literature have been determined in open atmospheric conditions indicating that the substances involved are not influenced by the presence of air and moisture. In these cases, the Gibbs phase rule is applied in its open condition of 1 atm pressure, and no special conditions need to impose. However, for many elements, such as all reactive metals, the phase diagrams are determined by conditions imposed to remove all the reactive actions of the presence of an atmosphere. In these cases, a special cell is needed to be constructed in a way that the material of construction of the cell and the absence of air is secured. The Gibbs phase rule is applied in its full mathematical formulation in those cases. The present publication reports on the determination of correct conditions to obtain meaningful results on the phase diagrams.
{"title":"On The Application Of Gibbs Equations In Determining The Relationships Of Vapour Pressures To Phase Diagrams Of The Reactive Chloride Systems","authors":"A. A. Kipouros, G. Jarjoura, G. J. Kipouros","doi":"10.37394/232031.2023.2.6","DOIUrl":"https://doi.org/10.37394/232031.2023.2.6","url":null,"abstract":"Most of the phase diagrams reported in the literature have been determined in open atmospheric conditions indicating that the substances involved are not influenced by the presence of air and moisture. In these cases, the Gibbs phase rule is applied in its open condition of 1 atm pressure, and no special conditions need to impose. However, for many elements, such as all reactive metals, the phase diagrams are determined by conditions imposed to remove all the reactive actions of the presence of an atmosphere. In these cases, a special cell is needed to be constructed in a way that the material of construction of the cell and the absence of air is secured. The Gibbs phase rule is applied in its full mathematical formulation in those cases. The present publication reports on the determination of correct conditions to obtain meaningful results on the phase diagrams.","PeriodicalId":23701,"journal":{"name":"World Academy of Science, Engineering and Technology, International Journal of Chemical, Molecular, Nuclear, Materials and Metallurgical Engineering","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135154377","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 : 2023-09-18DOI: 10.37394/232031.2023.2.5
Mohammedi Ferhat, Haddad Hanane, Laggoun Chouki
This present study is desired to calculate the concentration in horizontal direction of flow of pollutant. As any mathematical models of natural systems, a climate model is a simplification. The degree of accepted simplification determines the complexity of the model and restricts the applicability of the model to certain questions. Hence, the complexity of a chosen model sets the limitations to its application. The quality of a climate model is not judged by the mere number of processes considered, but rather by the quality of how chosen processes and their couplings are reproduced.
{"title":"Modeling Dispersion Dust Aerosol Particles Monitoring and Evaluation in Desert South Sahara","authors":"Mohammedi Ferhat, Haddad Hanane, Laggoun Chouki","doi":"10.37394/232031.2023.2.5","DOIUrl":"https://doi.org/10.37394/232031.2023.2.5","url":null,"abstract":"This present study is desired to calculate the concentration in horizontal direction of flow of pollutant. As any mathematical models of natural systems, a climate model is a simplification. The degree of accepted simplification determines the complexity of the model and restricts the applicability of the model to certain questions. Hence, the complexity of a chosen model sets the limitations to its application. The quality of a climate model is not judged by the mere number of processes considered, but rather by the quality of how chosen processes and their couplings are reproduced.","PeriodicalId":23701,"journal":{"name":"World Academy of Science, Engineering and Technology, International Journal of Chemical, Molecular, Nuclear, Materials and Metallurgical Engineering","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135153583","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 : 2023-08-29DOI: 10.37394/232031.2023.2.4
S. M. Hasan, Saad Khan, A. Hakam, Satya Shah
The purpose of this paper is to propose a method of reducing material and time waste during packaging in the pharmaceutical industry. This is done by means of identifying the four major lean wastes i.e., motion, inadequate processing, waiting, and defects. These wastes are identified and reduced by means of using lean tools and proposing other cost-effective solutions that would increase process efficiency. Material waste is dealt with through selecting optimal requirements under the constraint limits of ergonomics, engineering, and machine space availability. Along with reduction in change over time, a strategy ensuring improvement in the primary packaging area was developed. The validity of this research has been brought about by means of a case study of a multinational pharmaceutical company. The proposed system proves to be highly beneficial in ensuring wastage and time reduction in changeovers. This strategy provides improved results without any new costs introduced and the production targets were met faster. There is also a special consideration given to the ergonomic aspect of the production processes.
{"title":"Reduction in Packaging Wastes Through Identification of Lean Wastes to Deliver Efficient Waste Controlling Techniques for a Pharmaceutical Industry","authors":"S. M. Hasan, Saad Khan, A. Hakam, Satya Shah","doi":"10.37394/232031.2023.2.4","DOIUrl":"https://doi.org/10.37394/232031.2023.2.4","url":null,"abstract":"The purpose of this paper is to propose a method of reducing material and time waste during packaging in the pharmaceutical industry. This is done by means of identifying the four major lean wastes i.e., motion, inadequate processing, waiting, and defects. These wastes are identified and reduced by means of using lean tools and proposing other cost-effective solutions that would increase process efficiency. Material waste is dealt with through selecting optimal requirements under the constraint limits of ergonomics, engineering, and machine space availability. Along with reduction in change over time, a strategy ensuring improvement in the primary packaging area was developed. The validity of this research has been brought about by means of a case study of a multinational pharmaceutical company. The proposed system proves to be highly beneficial in ensuring wastage and time reduction in changeovers. This strategy provides improved results without any new costs introduced and the production targets were met faster. There is also a special consideration given to the ergonomic aspect of the production processes.","PeriodicalId":23701,"journal":{"name":"World Academy of Science, Engineering and Technology, International Journal of Chemical, Molecular, Nuclear, Materials and Metallurgical Engineering","volume":"65 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90168070","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 : 2023-07-12DOI: 10.37394/232031.2023.2.2
A. Walunj, A. Sathyabhama
In present study, pool boiling heat transfer (PBHT) from biphilic stepped microchannel comprising: hydrophobic fin top and hydrophilic channel region is investigated. The biphilic stepped microchannel is prepared by mechanical polishing and thermo-catalytic etching. The improved liquid supply pattern, increased nucleation site density, retarded bubble coalescence between the adjacent channel and decreased wall forces acting on the bubble meniscus resulted in the PBHT enhancement. Contact angle of the water droplet on hydrophobic and hydrophilic surface is 74.02° and 22.5°, respectively. Enhancement in critical heat flux and heat transfer coefficient by the biphilic stepped microchannel is 195.52% and 367.00%, respectively.
{"title":"Pool Boiling Heat Transfer Enhancement through Biphilic Stepped Microchannel","authors":"A. Walunj, A. Sathyabhama","doi":"10.37394/232031.2023.2.2","DOIUrl":"https://doi.org/10.37394/232031.2023.2.2","url":null,"abstract":"In present study, pool boiling heat transfer (PBHT) from biphilic stepped microchannel comprising: hydrophobic fin top and hydrophilic channel region is investigated. The biphilic stepped microchannel is prepared by mechanical polishing and thermo-catalytic etching. The improved liquid supply pattern, increased nucleation site density, retarded bubble coalescence between the adjacent channel and decreased wall forces acting on the bubble meniscus resulted in the PBHT enhancement. Contact angle of the water droplet on hydrophobic and hydrophilic surface is 74.02° and 22.5°, respectively. Enhancement in critical heat flux and heat transfer coefficient by the biphilic stepped microchannel is 195.52% and 367.00%, respectively.","PeriodicalId":23701,"journal":{"name":"World Academy of Science, Engineering and Technology, International Journal of Chemical, Molecular, Nuclear, Materials and Metallurgical Engineering","volume":"17 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89694837","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 : 2023-07-12DOI: 10.37394/232031.2023.2.3
D. Rustamova, Elnare Firdus, Rahim Rahimov Mahammad
Composite materials based on polymer fillers have been intensively studied in recent years, and in many cases, polymer nanocomposites find new applications in the preparation of certain sensors (recorders), surface coatings of spacecraft, especial type of the sensors. In addition, it is known that the change in the size of the fillers, the resistance of the composite materials to the influence of various types of radiation ( ℽ -rays, electron, e-rays, ultraviolet rays, etc.), electrical conductivity, etc.), the study of which is still relevant today, and occupies a large place in radiation materials science. It can be noted that composite materials consisting of polymer - nanoscale fillers occupy a key place in many global research centers of the world. The purpose of the work is to obtain and study new electroactive (electret, antistatic, radiation-sensitive) polymer composite materials. Polypropylene was used as binder and 𝐴𝑙 2 𝑂 3 oxide as filler in this work. In other research works, the sizes of the oxide fillers were large. In this study, nanofillers were used. Experiments show that as the size of oxide particles decreases, its electret properties improve. At the same time, the relaxation process of electret charges of polymer composites also depends on the value of the initial irradiation dose of 𝛾 -rays. As a result of studying the relaxation 𝛼 -, 𝛽 - and 𝛾 - processes of 𝑃𝑃 𝛼⁄ - 𝐴𝑙 2 𝑂 3 composites in the temperature range of 100 ÷ 500 K by the radio-thermo-luminescence (RTL) method, it was determined that the maximum at T = 230 K, the observed luminescence peak from the filler concentration ((20÷40) % 𝛼 - 𝐴𝑙 2 𝑂 3 ) and varies proportionally depending on the radiation dose, and it can be used as a dosimeter in γ-dosimetry at a dose rate of up to 50 kGr.
{"title":"Effective Changes In Polymer Nanocomposite Materials When They Are Modified with γ-Rays","authors":"D. Rustamova, Elnare Firdus, Rahim Rahimov Mahammad","doi":"10.37394/232031.2023.2.3","DOIUrl":"https://doi.org/10.37394/232031.2023.2.3","url":null,"abstract":"Composite materials based on polymer fillers have been intensively studied in recent years, and in many cases, polymer nanocomposites find new applications in the preparation of certain sensors (recorders), surface coatings of spacecraft, especial type of the sensors. In addition, it is known that the change in the size of the fillers, the resistance of the composite materials to the influence of various types of radiation ( ℽ -rays, electron, e-rays, ultraviolet rays, etc.), electrical conductivity, etc.), the study of which is still relevant today, and occupies a large place in radiation materials science. It can be noted that composite materials consisting of polymer - nanoscale fillers occupy a key place in many global research centers of the world. The purpose of the work is to obtain and study new electroactive (electret, antistatic, radiation-sensitive) polymer composite materials. Polypropylene was used as binder and 𝐴𝑙 2 𝑂 3 oxide as filler in this work. In other research works, the sizes of the oxide fillers were large. In this study, nanofillers were used. Experiments show that as the size of oxide particles decreases, its electret properties improve. At the same time, the relaxation process of electret charges of polymer composites also depends on the value of the initial irradiation dose of 𝛾 -rays. As a result of studying the relaxation 𝛼 -, 𝛽 - and 𝛾 - processes of 𝑃𝑃 𝛼⁄ - 𝐴𝑙 2 𝑂 3 composites in the temperature range of 100 ÷ 500 K by the radio-thermo-luminescence (RTL) method, it was determined that the maximum at T = 230 K, the observed luminescence peak from the filler concentration ((20÷40) % 𝛼 - 𝐴𝑙 2 𝑂 3 ) and varies proportionally depending on the radiation dose, and it can be used as a dosimeter in γ-dosimetry at a dose rate of up to 50 kGr.","PeriodicalId":23701,"journal":{"name":"World Academy of Science, Engineering and Technology, International Journal of Chemical, Molecular, Nuclear, Materials and Metallurgical Engineering","volume":"34 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90336408","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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