ABSTRACT: In this study, porous zeolite spheres were produced at a low temperature by a facile and economical method, sol-gel, using a natural zeolite from the Gördes region of Türkiye and waste soda glass powder. Waste glass powder was achieved by milling the recyclable waste soda glass bottles to be used as a source of silica. Elemental analysis of the waste glass was carried out by using X-ray fluorescence spectrometry. It was determined that Si (57.3 wt. %), Ca (20.9 wt. %), Na (13.9 wt. %), Mg (2.64 wt. %), and Al (1.64 wt. %) were the major constituents of the waste glass. Three different sphere compositions were designed containing 1:1, 3:2, and 7:3 zeolite:waste glass ratio. When the zeolite:waste glass ratio was 1:1 oval-shaped green spheres were achieved. For the compositions containing 3:2, and 7:3 zeolite:waste glass ratio spherical green samples were achieved. Prepared spheres were sintered at 300°, 400°, and 500°C for 1 h. It was observed that the samples could not maintain their spherical form when the sintering temperature was lower than 500°C. Scanning electron microscopy investigation of the spheres sintered at 500°C revealed that highly porous zeolite spheres, containing pores from ~20 µm to nanometre sizes, were achieved. Image J software was used to determine effect of composition on the size and size distribution of the sintered spheres.
{"title":"Low Temperature Sintering of Porous Zeolite Spheres via Waste Glass Powder Addition","authors":"Ayse Kurt, A. Kalemtas","doi":"10.13005/msri/200302","DOIUrl":"https://doi.org/10.13005/msri/200302","url":null,"abstract":"ABSTRACT: In this study, porous zeolite spheres were produced at a low temperature by a facile and economical method, sol-gel, using a natural zeolite from the Gördes region of Türkiye and waste soda glass powder. Waste glass powder was achieved by milling the recyclable waste soda glass bottles to be used as a source of silica. Elemental analysis of the waste glass was carried out by using X-ray fluorescence spectrometry. It was determined that Si (57.3 wt. %), Ca (20.9 wt. %), Na (13.9 wt. %), Mg (2.64 wt. %), and Al (1.64 wt. %) were the major constituents of the waste glass. Three different sphere compositions were designed containing 1:1, 3:2, and 7:3 zeolite:waste glass ratio. When the zeolite:waste glass ratio was 1:1 oval-shaped green spheres were achieved. For the compositions containing 3:2, and 7:3 zeolite:waste glass ratio spherical green samples were achieved. Prepared spheres were sintered at 300°, 400°, and 500°C for 1 h. It was observed that the samples could not maintain their spherical form when the sintering temperature was lower than 500°C. Scanning electron microscopy investigation of the spheres sintered at 500°C revealed that highly porous zeolite spheres, containing pores from ~20 µm to nanometre sizes, were achieved. Image J software was used to determine effect of composition on the size and size distribution of the sintered spheres.","PeriodicalId":18247,"journal":{"name":"Material Science Research India","volume":"57 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140507629","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}
{"title":"Utilizing a Variable Material Approach to Combat Climate Change","authors":"Jyoti Bhattacharjee, S. Roy","doi":"10.13005/msri/200301","DOIUrl":"https://doi.org/10.13005/msri/200301","url":null,"abstract":"","PeriodicalId":18247,"journal":{"name":"Material Science Research India","volume":"15 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140506607","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}
Shajeeh Fasil T, L. Periyasamy, M. Seethapathi, K. M. Das
ABSTRACT: India uses more than 100 million cubic meters of concrete annually, making it the most common building material. It is common knowledge that traditional concrete constructed using compressive strength does not meet many functional requirements, including impermeability and frost resistance. By emitting a significant amount of CO2, the manufacture of Portland cement, a key component of concrete, has had disastrous effects on our ecosystem. When one tonne of cement materials is produced, one tonne of CO2 and other greenhouse gases are emitted. Additional cementitious materials must be used to efficiently substitute cement without compromising the required qualities of concrete. The samples were tested for durability properties like water and chloride permeability and mechanical properties for lengths of 7, 28, and 56 days. Mix M7 exhibits outstanding compressive strength progression, showcasing impressive results of 30.72 N/mm² at 14 days, followed by significant enhancement to 43.18 N/mm² at 28 days, and a robust 48.91 N/mm² at 56 days, making it a highly durable and high-performance concrete mix. In the study comparing the conventional mix and study mix (M1 to M8), the M7 mix exhibited a 28-day split tensile strength of 4.28 N/mm² and flexural strength of 9.657 N/mm². A significant amount of fly ash produced by the coal-based power station is recovered via huge ponds and dykes. It was revealed that 30% GGBS and 20% pond ash replacement of cement yielded the best results. According to research, there are industrial wastes that can replace up to 40% and 20% of the cement and fine aggregate in concrete by GGBS and Pond Ash, respectively.
{"title":"Enhancing Sustainable Concrete Investigating the Feasibility of POND ASH as a Partial Replacement for Fine Aggregate in GGBS-Based","authors":"Shajeeh Fasil T, L. Periyasamy, M. Seethapathi, K. M. Das","doi":"10.13005//msri/200305","DOIUrl":"https://doi.org/10.13005//msri/200305","url":null,"abstract":"ABSTRACT: India uses more than 100 million cubic meters of concrete annually, making it the most common building material. It is common knowledge that traditional concrete constructed using compressive strength does not meet many functional requirements, including impermeability and frost resistance. By emitting a significant amount of CO2, the manufacture of Portland cement, a key component of concrete, has had disastrous effects on our ecosystem. When one tonne of cement materials is produced, one tonne of CO2 and other greenhouse gases are emitted. Additional cementitious materials must be used to efficiently substitute cement without compromising the required qualities of concrete. The samples were tested for durability properties like water and chloride permeability and mechanical properties for lengths of 7, 28, and 56 days. Mix M7 exhibits outstanding compressive strength progression, showcasing impressive results of 30.72 N/mm² at 14 days, followed by significant enhancement to 43.18 N/mm² at 28 days, and a robust 48.91 N/mm² at 56 days, making it a highly durable and high-performance concrete mix. In the study comparing the conventional mix and study mix (M1 to M8), the M7 mix exhibited a 28-day split tensile strength of 4.28 N/mm² and flexural strength of 9.657 N/mm². A significant amount of fly ash produced by the coal-based power station is recovered via huge ponds and dykes. It was revealed that 30% GGBS and 20% pond ash replacement of cement yielded the best results. According to research, there are industrial wastes that can replace up to 40% and 20% of the cement and fine aggregate in concrete by GGBS and Pond Ash, respectively.","PeriodicalId":18247,"journal":{"name":"Material Science Research India","volume":"20 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140506889","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}
Basim S T, L. Periyasamy, M. Seethapathi, K. M. Das
ABSTRACT: The coarse aggregate replacement in part with crushed waste ceramic tiles was explored at varying percentages, ranging from 10% to 50%. Simultaneously, granite powder and ceramic tile powder were employed as substitutes for fine aggregate, each at a 10% replacement rate alongside the ceramic coarse tiles. As a result of continuous innovations and advancements in the construction industry, there has been a significant rise in the utilization of natural aggregates. The generation of solid waste from construction demolitions has also witnessed a substantial increase. Research indicates that approximately from 20% to 30% of materials produced in manufacturing plants end up as waste. To address the constraints of natural aggregate resources and mitigate construction waste, there is a pressing need to repurpose this waste material. Concrete of M25 grade was designed and subjected to testing. Mix designs for different combinations were formulated by altering the percentages of crushed tiles and granite powder in both coarse and fine aggregates. Experiments were conducted on several concrete mixes using variable volumes of discarded shattered tiles and granite powder during seven, fourteen, and 28 days of curing. These examinations included “workability assessments, compressive strength tests, split tensile strength tests, and flexural strength tests”. The results show that larger replacement percentages of granite powder and crumbled tiles boost workability. Additionally, the strength of the concrete exhibited an improvement, particularly with a 30% replacement of ceramic coarse tile aggregate. Explore the use of advanced ceramic composites with improved mechanical properties and durability for enhanced performance in concrete. Investigate the potential use of recycled ceramics or explore novel production methods that reduce energy consumption and greenhouse gas emissions, aligning with sustainable construction practices. KEYWORDS: Ceramic Tiles; Granite Powder; M25 Grade; Mechanical Properties; Solid Waste; Workability
{"title":"Optimizing Concrete Strength with the Partial Replacement of Aggregate with Ceramic Tiles for Sustainable Construction","authors":"Basim S T, L. Periyasamy, M. Seethapathi, K. M. Das","doi":"10.13005/msri/200306","DOIUrl":"https://doi.org/10.13005/msri/200306","url":null,"abstract":"ABSTRACT: The coarse aggregate replacement in part with crushed waste ceramic tiles was explored at varying percentages, ranging from 10% to 50%. Simultaneously, granite powder and ceramic tile powder were employed as substitutes for fine aggregate, each at a 10% replacement rate alongside the ceramic coarse tiles. As a result of continuous innovations and advancements in the construction industry, there has been a significant rise in the utilization of natural aggregates. The generation of solid waste from construction demolitions has also witnessed a substantial increase. Research indicates that approximately from 20% to 30% of materials produced in manufacturing plants end up as waste. To address the constraints of natural aggregate resources and mitigate construction waste, there is a pressing need to repurpose this waste material. Concrete of M25 grade was designed and subjected to testing. Mix designs for different combinations were formulated by altering the percentages of crushed tiles and granite powder in both coarse and fine aggregates. Experiments were conducted on several concrete mixes using variable volumes of discarded shattered tiles and granite powder during seven, fourteen, and 28 days of curing. These examinations included “workability assessments, compressive strength tests, split tensile strength tests, and flexural strength tests”. The results show that larger replacement percentages of granite powder and crumbled tiles boost workability. Additionally, the strength of the concrete exhibited an improvement, particularly with a 30% replacement of ceramic coarse tile aggregate. Explore the use of advanced ceramic composites with improved mechanical properties and durability for enhanced performance in concrete. Investigate the potential use of recycled ceramics or explore novel production methods that reduce energy consumption and greenhouse gas emissions, aligning with sustainable construction practices. KEYWORDS: Ceramic Tiles; Granite Powder; M25 Grade; Mechanical Properties; Solid Waste; Workability","PeriodicalId":18247,"journal":{"name":"Material Science Research India","volume":"56 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140507058","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}
ABSTRACT: Currently, lithium-ion batteries have the highest energy density; hence naturally, this chemistry is the most promising solution for high-density energy storage. This means the commercially used anode material, that is, graphite with a theoretical capacity of 372 mAh/g, needs to be improved; hence the implementation of more capacity material is needed. In regard, silicon is the best alternative available for this with ~4200 mAh/g theoretical capacity. In this work an industrially scalable procedure using ultrasonication followed shear mixer to synthesize a composite of ball-milled silicon with exfoliated graphite for the anode material in lithium-ion batteries. The material is characterized using X-ray diffraction for crystallite information, and scanning electron microscopy shows the composite visuals with X-ray photoelectron spectroscopy to indicate bonding details in the composite, along with half coin-cell tested for18 cycles with a capacity of 222.48 mAh/g and columbic efficiency of 97.86%. Hence the silicon/exfoliated graphite composite using 2 step ultrasonic and shear process can be economical and scalable.
摘要：目前，锂离子电池具有最高的能量密度；因此，这种化学物质自然是最有希望实现高密度能量存储的解决方案。这意味着需要改进商业上使用的负极材料，即理论容量为 372 mAh/g 的石墨；因此需要采用容量更大的材料。在这方面，硅是最好的替代材料，其理论容量约为 4200 mAh/g。在这项工作中，采用了一种可工业化扩展的程序，利用超声波和剪切混合器合成了一种球磨硅与剥离石墨的复合材料，用于锂离子电池的负极材料。该材料通过 X 射线衍射获得结晶信息，通过扫描电子显微镜显示复合材料的视觉效果，通过 X 射线光电子能谱显示复合材料中的键合细节，并对半电池进行了 18 次循环测试，测试结果显示电池容量为 222.48 mAh/g，电池效率为 97.86%。因此，使用两步超声波和剪切工艺的硅/剥离石墨复合材料既经济又可扩展。
{"title":"Ultrasonic-Assisted Synthesis of Silicon/Exfoliated-Graphite Nanocomposite as Anode Material for Lithium-Ion Batteries","authors":"Dinesh Bejjanki, Vrushabh Dharmik, Uday Bhaskar Babu Gara, Sampath Kumar Puttapati","doi":"10.13005/msri/200304","DOIUrl":"https://doi.org/10.13005/msri/200304","url":null,"abstract":"ABSTRACT: Currently, lithium-ion batteries have the highest energy density; hence naturally, this chemistry is the most promising solution for high-density energy storage. This means the commercially used anode material, that is, graphite with a theoretical capacity of 372 mAh/g, needs to be improved; hence the implementation of more capacity material is needed. In regard, silicon is the best alternative available for this with ~4200 mAh/g theoretical capacity. In this work an industrially scalable procedure using ultrasonication followed shear mixer to synthesize a composite of ball-milled silicon with exfoliated graphite for the anode material in lithium-ion batteries. The material is characterized using X-ray diffraction for crystallite information, and scanning electron microscopy shows the composite visuals with X-ray photoelectron spectroscopy to indicate bonding details in the composite, along with half coin-cell tested for18 cycles with a capacity of 222.48 mAh/g and columbic efficiency of 97.86%. Hence the silicon/exfoliated graphite composite using 2 step ultrasonic and shear process can be economical and scalable.","PeriodicalId":18247,"journal":{"name":"Material Science Research India","volume":"50 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140507735","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}
Désiré M. K. Abro, Collette A. Djassou, Yao J. Adjoumani, Benjamin K. Yao
The protection of XC100 steel against oxidation due to butane/propane combustion by the mean of nickel (Ni), Nickel-Silicon (Ni-Si), and Nickel-Silicon carbide (Ni-SiC) electrodeposited coatings is reported. Gravimetric and microstructural characterizations of coatings after direct exposure to the gas flame were conducted. The results show that Ni-SiC coating improves the protection against oxidation of the underlying steel XC100 by decreasing the rate of weight gain by about 20 times against 13 times for Ni due to the decomposition of SiC particles in the boundaries of the coaxial grains network. Besides, the preferential oxidation of silicon particles to SiO2 into the nickel matrix revealed by EDS-X analysis confers stability to Ni-Si coating although its catching of mass is slightly higher than that of Ni-SiC. The charge transfer resistance Rct and the oxide electrical resistance Roxide extracted from Electrochemical Impedance spectroscopy agreed with gravimetric and microstructural observations.
{"title":"Performances of Silicon and Silicon Carbide Reinforced Nickel Electrodeposited Coatings Against Oxidation of Xc100 Carbon Steels Exposed to Butane/Propane Combustion in the Open Air","authors":"Désiré M. K. Abro, Collette A. Djassou, Yao J. Adjoumani, Benjamin K. Yao","doi":"10.13005/msri/200204","DOIUrl":"https://doi.org/10.13005/msri/200204","url":null,"abstract":"The protection of XC100 steel against oxidation due to butane/propane combustion by the mean of nickel (Ni), Nickel-Silicon (Ni-Si), and Nickel-Silicon carbide (Ni-SiC) electrodeposited coatings is reported. Gravimetric and microstructural characterizations of coatings after direct exposure to the gas flame were conducted. The results show that Ni-SiC coating improves the protection against oxidation of the underlying steel XC100 by decreasing the rate of weight gain by about 20 times against 13 times for Ni due to the decomposition of SiC particles in the boundaries of the coaxial grains network. Besides, the preferential oxidation of silicon particles to SiO2 into the nickel matrix revealed by EDS-X analysis confers stability to Ni-Si coating although its catching of mass is slightly higher than that of Ni-SiC. The charge transfer resistance Rct and the oxide electrical resistance Roxide extracted from Electrochemical Impedance spectroscopy agreed with gravimetric and microstructural observations.","PeriodicalId":18247,"journal":{"name":"Material Science Research India","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135363467","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 antimicrobial cotton fabric has been prepared by coating it with Ag treated with SDS(Sodium dodecyl sulphate) nanocoating and its antimicrobial properties have been tested. It is observed in the present study, that the nanocoating coated cotton fabrics have good antimicrobial properties. The coated cotton fabric showed an antibacterial activity value of 5.86 against Klebsiella pneumonia ATCC 4352 and that of 4.89 against Staphylococcus aureus ATCC 6538 when tested according to the JIS L 1902-2015 method.
采用SDS(十二烷基硫酸钠)纳米涂层将银包覆在抗菌棉织物上，并对其抗菌性能进行了测试。研究结果表明，纳米涂层棉织物具有良好的抗菌性能。根据JIS L 1902-2015方法测试，涂层棉织物对肺炎克雷伯菌ATCC 4352的抗菌活性值为5.86，对金黄色葡萄球菌ATCC 6538的抗菌活性值为4.89。
{"title":"Antimicrobial Activity of SDS/Ag Treated Cotton Fabric","authors":"Sorna Gowri Vijaya Kumar","doi":"10.13005/msri/200208","DOIUrl":"https://doi.org/10.13005/msri/200208","url":null,"abstract":"The antimicrobial cotton fabric has been prepared by coating it with Ag treated with SDS(Sodium dodecyl sulphate) nanocoating and its antimicrobial properties have been tested. It is observed in the present study, that the nanocoating coated cotton fabrics have good antimicrobial properties. The coated cotton fabric showed an antibacterial activity value of 5.86 against Klebsiella pneumonia ATCC 4352 and that of 4.89 against Staphylococcus aureus ATCC 6538 when tested according to the JIS L 1902-2015 method.","PeriodicalId":18247,"journal":{"name":"Material Science Research India","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135363469","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}
D. N. P. I. Chathuranga, R. C. L De Silva, L. D. C Nayanajith, A. M. K. L. Abeykoon, H. C. D. P Colombage, M. H. T. Dulaj, I. R. M Kottegoda
Nanocomposites of natural rubber (NR) with reduced graphene oxide (rGO) were prepared by varying their ratios intending to improve the electrical and mechanical properties of natural rubber. rGO was prepared through oxidation and subsequent reduction of high purity Sri Lankan vein graphite. The prepared nanocomposites were characterized using Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and X-ray diffraction (XRD) techniques. The SEM images viewed a uniform homogeneous surface of the nanocomposite while FTIR and XRD spectral signatures substantiated its chemical functionalities and structural traits respectively. Mechanical properties such as tensile stress & strain, elongation at break, hardness, Young's modulus, and strain of the nanocomposite, were also investigated. Here the electrical conductivity was measured using the two-probe method. The nanocomposite started conducting at 2% rGO in rubber and increased conducting with increasing rGO. The hardness of the composites continuously increased with increasing rGO in rubber. Despite the tensile strength and elongation at break, Young's modulus also increased with increasing the rGO percentage up to 1.5 % and was optimized at the particular ratio. The highest strength of 15.91MPa was obtained at 1.5% of rGO. A detailed property investigation of rGO/NR nanocomposite has not been reported previously for the best of our knowledge. Hence, the study expected to be well supportive for future industrial developments including electronics, electrical devices, batteries, capacitors, as well as in heavy equipment including aerospace and automobiles.
{"title":"Effects of rGO Concentration on Electrical and Mechanical Properties of rGO Natural Rubber Nanocomposite","authors":"D. N. P. I. Chathuranga, R. C. L De Silva, L. D. C Nayanajith, A. M. K. L. Abeykoon, H. C. D. P Colombage, M. H. T. Dulaj, I. R. M Kottegoda","doi":"10.13005/msri/200203","DOIUrl":"https://doi.org/10.13005/msri/200203","url":null,"abstract":"Nanocomposites of natural rubber (NR) with reduced graphene oxide (rGO) were prepared by varying their ratios intending to improve the electrical and mechanical properties of natural rubber. rGO was prepared through oxidation and subsequent reduction of high purity Sri Lankan vein graphite. The prepared nanocomposites were characterized using Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and X-ray diffraction (XRD) techniques. The SEM images viewed a uniform homogeneous surface of the nanocomposite while FTIR and XRD spectral signatures substantiated its chemical functionalities and structural traits respectively. Mechanical properties such as tensile stress & strain, elongation at break, hardness, Young's modulus, and strain of the nanocomposite, were also investigated. Here the electrical conductivity was measured using the two-probe method. The nanocomposite started conducting at 2% rGO in rubber and increased conducting with increasing rGO. The hardness of the composites continuously increased with increasing rGO in rubber. Despite the tensile strength and elongation at break, Young's modulus also increased with increasing the rGO percentage up to 1.5 % and was optimized at the particular ratio. The highest strength of 15.91MPa was obtained at 1.5% of rGO. A detailed property investigation of rGO/NR nanocomposite has not been reported previously for the best of our knowledge. Hence, the study expected to be well supportive for future industrial developments including electronics, electrical devices, batteries, capacitors, as well as in heavy equipment including aerospace and automobiles.","PeriodicalId":18247,"journal":{"name":"Material Science Research India","volume":"154 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135363471","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 goal of propeller designers has always been to increase several settings to improve propulsion efficiency have been devised. One of the leading attractive propulsion systems is coupled contra-rotating propellers, which can be expected to significantly improve the open water efficiency with reduced rotational kinetic energy losses. The 3-Dimensional hydrodynamic contour of the coupled contra rotating propellers makes simulation with the highest rotational velocity of 2000rpm with an analytical structural design exceedingly challenging deformation must be less then 1mm. To analyze the propeller strength the Ansys FEM Simulation approach is applied. Static analysis is carried out with a Stainless Steel and has a component of strength analysis to guarantee the safety of the coupled contra-rotating propellers.
{"title":"Design and Structural analysis of Marlin Torpedo with Coupled Contra Rotating Propellers","authors":"Pothuraju V V Satyanarayana, Vivek Sachan","doi":"10.13005/msri/200206","DOIUrl":"https://doi.org/10.13005/msri/200206","url":null,"abstract":"The goal of propeller designers has always been to increase several settings to improve propulsion efficiency have been devised. One of the leading attractive propulsion systems is coupled contra-rotating propellers, which can be expected to significantly improve the open water efficiency with reduced rotational kinetic energy losses. The 3-Dimensional hydrodynamic contour of the coupled contra rotating propellers makes simulation with the highest rotational velocity of 2000rpm with an analytical structural design exceedingly challenging deformation must be less then 1mm. To analyze the propeller strength the Ansys FEM Simulation approach is applied. Static analysis is carried out with a Stainless Steel and has a component of strength analysis to guarantee the safety of the coupled contra-rotating propellers.","PeriodicalId":18247,"journal":{"name":"Material Science Research India","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135363472","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}
Today's challenge is to produce a biodegradable materials for packing which can partially replace traditional plastic materials. Starch-based biodegradable plastics are less harmful to the environment and breakdown faster than regular plastics. The goal of this research was to produce and characterize a biodegradable film(BF) made from Sorghum bicolor (L.) starch and glycerol plasticizer. The produced film contained two amounts of Sorghum bicolor (L.) starch (5 g and 10 g) and three percentages of glycerol (25%, 30%, and 40%). The Sorghum bicolor (L.) and biodegradable glycerol-based plastic film had the lowest density, water absorption, and thickness swelling of 0.99 g cm-3, 55.72%, and 10.72%, respectively. The tensile strength is maximum at 9.97 MPa and and elongation obtained is 23.84%. The Sorghum bicolor (L.) starch and glycerol-based biodegradable film decomposed by 69.23% after biodegradability testing of one week.
今天的挑战是生产一种可生物降解的包装材料，可以部分取代传统的塑料材料。淀粉基可生物降解塑料对环境的危害较小，而且比普通塑料分解得更快。本研究以高粱双色淀粉和甘油增塑剂为原料，制备并表征了一种生物可降解膜。所制备的薄膜含有两份高粱双色淀粉(5克和10克)和三份甘油(25%、30%和40%)。高粱双色膜和可生物降解甘油基塑料膜的密度、吸水率和厚度膨胀率最低，分别为0.99 g cm-3、55.72%和10.72%。拉伸强度在9.97 MPa时达到最大值，伸长率为23.84%。经过一周的可生物降解性试验，高粱淀粉甘油基生物降解膜的降解率为69.23%。
{"title":"Preparation of Biodegradable Plastic Film from Sorghum bicolor (L.) Corn Starch","authors":"Atere Juliet, Ogunmodede Oluwafemi, Adewumi Funmilayo, Kolawole Sunday","doi":"10.13005/msri/200205","DOIUrl":"https://doi.org/10.13005/msri/200205","url":null,"abstract":"Today's challenge is to produce a biodegradable materials for packing which can partially replace traditional plastic materials. Starch-based biodegradable plastics are less harmful to the environment and breakdown faster than regular plastics. The goal of this research was to produce and characterize a biodegradable film(BF) made from Sorghum bicolor (L.) starch and glycerol plasticizer. The produced film contained two amounts of Sorghum bicolor (L.) starch (5 g and 10 g) and three percentages of glycerol (25%, 30%, and 40%). The Sorghum bicolor (L.) and biodegradable glycerol-based plastic film had the lowest density, water absorption, and thickness swelling of 0.99 g cm-3, 55.72%, and 10.72%, respectively. The tensile strength is maximum at 9.97 MPa and and elongation obtained is 23.84%. The Sorghum bicolor (L.) starch and glycerol-based biodegradable film decomposed by 69.23% after biodegradability testing of one week.","PeriodicalId":18247,"journal":{"name":"Material Science Research India","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135363466","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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