Utilization Of Rubber Tree Bark As A Carbon Source For Electric Arc Furnace Steelmaking: Carbon/Slag Interaction At 1550℃,
2022
Chulalongkorn University
Utilization Of Rubber Tree Bark As A Carbon Source For Electric Arc Furnace Steelmaking: Carbon/Slag Interaction At 1550℃, Wasutha Bandityaruck, Weerayut Srichaisiriwaech, Somyote Kongkarat
Journal of Metals, Materials and Minerals
Rubber tree bark (RTB) is a biomass that consists of wood and rubber parts, with high volatile and ash contents. This research reports the utilization of RTB as a carbon source in Electric Arc Furnace steelmaking processes. RTB was mixed with coal at a ratio of 1:1 by weight, and heated at 1000℃ under an argon atmosphere for 1 h. The chars were brought to contact with Electric Arc Furnace slag (37.86 wt% Fe2O3) at 1550℃ for 15 min to investigate their interaction and compared to coal. Coal showed short slag foaming behavior with a foaming time of 4 min, …
Green Acidic Catalyst From Cellulose Extracted From Sugarcane Bagasse Through Pretreatment By Electron Beam Irradiation And Subsequent Sulfonation For Sugar Production,
2022
Chulalongkorn University
Green Acidic Catalyst From Cellulose Extracted From Sugarcane Bagasse Through Pretreatment By Electron Beam Irradiation And Subsequent Sulfonation For Sugar Production, Thitirat Rattanawongwiboon, Prim Chanklinhorm, Threeraphat Chutimasakul, Tanagorn Kwamman, Wilasinee Kingkam, Rattapon Khamlue, Sarute Ummartyotin
Journal of Metals, Materials and Minerals
The objective of this research is to prepare a green acidic catalyst from cellulose derived from sugarcane bagasse (SB). Initially, SB was pretreated by electron beam irradiation with a dose of 50 kGy to 200 kGy and subsequent acid hydrolysis to obtain cellulose. The cellulose derived from SB was carbonized at different temperatures for 4 h and then sulfonated with heating at 120°C under reflux. Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD) were used to confirm the successful preparation of acidic catalyst by irradiation pretreatment and subsequent sulfonation. The cellulose derived from irradiated SB at the lowest dose …
Sugarcane Waste-Derived Activated Carbon For Lithium-Sulfur Batteries With Enhanced Performance By Thiourea Doping,
2022
Chulalongkorn University
Sugarcane Waste-Derived Activated Carbon For Lithium-Sulfur Batteries With Enhanced Performance By Thiourea Doping, Yanisa Thumkaew, Vipada Petson, Thanapat Jorn-Am, Natee Sirisit, Chalathorn Chanthad, Jedsada Manyam, Xiao Liang, Shufeng Song, Peerasak Paoprasert
Journal of Metals, Materials and Minerals
In this work, bio-renewable sugarcane bagasse and leaf were utilized for the preparation of activated carbon (BAC and LAC), which was then employed as the host material in lithium-sulfur (Li-S) batteries. The activated carbon, for the first time, was doped with nitrogen and sulfur via the addition of thiourea during the synthesis of carbon char via a simple, one-step hydrothermal method. The activated carbon was used to fabricate the cathodes of the CR2032 coin cells. The amount of added thiourea was found to influence the nitrogen/sulfur content, porosity, amorphous/graphitic structure, and performance of the activated carbon. At 0.2C, BAC2 (4.15 …
Preparation Of Spent Coffee Grounds-Rubber Composites Using Natural Rubber Latex As Binder,
2022
Chulalongkorn University
Preparation Of Spent Coffee Grounds-Rubber Composites Using Natural Rubber Latex As Binder, Varittha Mitsaichon, Kanok-On Ruaesrijan, Pranee Phinyocheep, Taweechai Amornsakchai, Preeyanuch Junkong, Sombat Thanawan
Journal of Metals, Materials and Minerals
The aim of this work was to explore the use of natural rubber latex (NRL) as a natural binder (according to the BCG concept) to replace commercial synthetic binders such as polyurethane resin. A composite sheet of spent coffee ground (SCG) and natural rubber (NR) was prepared by mixing of SCG in NRL compounds having concentrations of 30% and 60% dry rubber content (DRC). The amount of SCG in the composites was varied from 33 to 167 part per hundred rubber (phr). The mixture was cast in a mold to form a thin sheet then left drying at room temperature …
Erratum To: In Search For Near-Room-Temperature Superconducting Critical Temperature Of Metal Superhydrides Under High Pressure: A Review,
2022
Chulalongkorn University
Erratum To: In Search For Near-Room-Temperature Superconducting Critical Temperature Of Metal Superhydrides Under High Pressure: A Review, Udomsilp Pinsook
Journal of Metals, Materials and Minerals
No abstract provided.
Graphene Derivatives Reinforced Metal Matrix Nanocomposite Coatings: A Review,
2022
Chulalongkorn University
Graphene Derivatives Reinforced Metal Matrix Nanocomposite Coatings: A Review, Hamed Sadabadi, Omid Ghaderi, Amir Kordijazi, Pradeep K. Rohatgi
Journal of Metals, Materials and Minerals
Due to the extraordinary mechanical, thermal, and electrical properties of graphene, graphene oxide (GO), and reduced graphene oxide (rGO), these materials have the potential to become ideal nanofillers in the electrodeposited nanocomposite coatings. This article provides an overview of literature on the improvements of properties associated with graphene, GO, and rGO-reinforced coatings, along with the processing parameters and mechanisms that would lead to these improvements in electrodeposited metal matrix nanocomposite coatings, where those affected the microstructural, mechanical, tribological, and anti-corrosion characteristics of coatings. The challenges associated with the electroplating of nanocomposite coatings are addressed. The results of this survey indicated …
The Correlation Between Phase Formation And The Structure Of The Pellets With The Fungal Immobilization Study As A Commercial Substrate Culture/Planting Material,
2022
Chulalongkorn University
The Correlation Between Phase Formation And The Structure Of The Pellets With The Fungal Immobilization Study As A Commercial Substrate Culture/Planting Material, Rattiphorn Sumang, Rampai Kodsueb, Narathip Vitayakorn, Ruangwut Chutima
Journal of Metals, Materials and Minerals
Calcined clay pellets are popular planting material for those who love to grow plants in pots. The calcined clay pellets consist of clay (C), phosphate rock (PR), and rice husk ash (RHA). [(1-x)(50C–50PR)-xRHA], x(RHA) = 0, 0.25, 0.30, 0.35, 0.40, 0.45, 0.50, 0.55, 0.60, and 0.65 wt% were prepared by a conventional solid-state reaction method. The samples were made into a spherical shape with a diameter of 10 mm and fired at 600℃ to 1000℃. The effect of x contents on phase formation, microstructure, and chemical properties of [(1-x)(50C–50PR)-xRHA] was studied. X-ray diffraction revealed the typical assemblages with quartz, illite, …
Synthesis And Antimicrobial Studies Of Nano-Copper Doped Carbon Substrates; Activated Carbon, Reduced Graphene Oxide, And Carbon Nanofiber,
2022
Chulalongkorn University
Synthesis And Antimicrobial Studies Of Nano-Copper Doped Carbon Substrates; Activated Carbon, Reduced Graphene Oxide, And Carbon Nanofiber, Songwuit Chanthee, Jenjira Jirasangthong, Channarong Asasvatesanupap, Malee Santikunaporn
Journal of Metals, Materials and Minerals
Copper oxides (CuxO) have received considerable attention as a result of their biological activity. Nanoparticles (NPs) of CuxO attached to different substrates exhibit a wide spectrum of antimicrobial activity against bacteria and viruses, with similar properties to silver. The antimicrobial activity of CuxO-NPs doped on distinctive carbon materials was investigated for three carbon substrates: apricot stone activated carbon (AAC), reduced graphene oxide (rGO) and carbon nanofiber (CNF). The CuxO-NPs (5 wt%) doped AAC and rGO substrates were prepared by impregnation of copper nitrate followed by a thermal treatment process, while a similar weight of CuxO-NPs doped CNF was fabricated by …
Preparation Of Feedstock Containing Water-Soluble Binder For Powder Injection Moulding Of Silver,
2022
Chulalongkorn University
Preparation Of Feedstock Containing Water-Soluble Binder For Powder Injection Moulding Of Silver, Chuanchom Aumnate, Nithiwach Nawaukkaratharnant, Nutthita Chuankrerkkul
Journal of Metals, Materials and Minerals
Feedstock for powder injection moulding of silver was prepared using water-soluble binder composed of polyethylene glycol (PEG) and polyvinyl butyrol (PVB). Silver powders with particle size in range of 1 μm to 20 μm can be mixed with PEG/PVB binder system to form feedstocks having powder loadings of 42 vol% and 45 vol%. PEG can be removed using water leaching method while PVB can be removed by thermal debinding. Specimens retained their shapes during debinding and after debinding. Components fabricated with relatively higher powder loading resulted in higher density with lower porosity. Density of specimens containing powder loading of 42 …
Tungsten Disulfide-Nickel Oxide Hybrids As High-Performance Supercapacitors,
2022
Chulalongkorn University
Tungsten Disulfide-Nickel Oxide Hybrids As High-Performance Supercapacitors, Zainab Ali Hrbe, Samaher Waheed Hashim
Journal of Metals, Materials and Minerals
Two-dimensional materials are suitable for energy storage applications due to their chemical stability, high electrical conductivity and large specific surface area. In this work, tungsten disulfide (WS2) nanosheets were synthesized by chemical exfoliation method and combined with nickel oxide (NiO) nanoparticles to be used as a working electrode for storing energy. The WS2 electrode alone shows a capacitance of about 21.87 mF⸳cm-2, which is improved up to 64.58 mF⸳cm-2 by adding NiO nanoparticles. The occurrence of redox reactions plays an important role in increasing the final capacitance. Moreover, the proposed hybrid maintains 93% of its initial capacitance after 5000 charge-discharge …
The Influence Of Different Crystal Modifiers On Ultra-Low Embodied Energy Curing Fiber-Reinforced Cement Composites,
2022
Chulalongkorn University
The Influence Of Different Crystal Modifiers On Ultra-Low Embodied Energy Curing Fiber-Reinforced Cement Composites, Passakorn Sonprasarn, Wichit Prakaypan, Sureerat Polsilapa, Nuntaporn Kongkajun, Edward A. Laitila, Nutthita Chuankrerkkul, Parinya Chakartnarodom
Journal of Metals, Materials and Minerals
Fiber-reinforced cement composites (FRCC) are widely used in the construction of houses and commercial buildings in many countries such as the United States, the United Kingdom, the European countries, and the Asian countries such as China, India, and Thailand. Conventionally, the FRCC is manufactured from Portland cement, silica sand, and cellulose fiber using the so-called autoclaved curing under a designate hydrothermal condition to accelerate the hydration reaction resulting in superior properties. However, the autoclave-curing process needs a huge investment and generates highly environmental impact specially greenhouse gases due to its heavy energy consumption. Hence, this research aims to develop the …
Sequential Injection Analysis For Mercury Ion With Modified Screen – Printed Carbon Electrode,
2022
Chulalongkorn University
Sequential Injection Analysis For Mercury Ion With Modified Screen – Printed Carbon Electrode, Eakkasit Punrat, Naphat Piyasart, Chalinee Auanphui, Rutanachai Thaipratum, Shoji Motomizu, Wanida Wonsawat
Journal of Metals, Materials and Minerals
In this study, we developed a simple high-throughput and cost-effective method for monitoring toxic metal ion in an environmental aqueous sample. Mercury ion determination with Sequential Injection Analysis system (SIAs) coupled with the electrochemical detection on the modified screen-printed carbon working electrode (SPCE) is an alternative green analysis of mercury ion. The gold film was used as the modified material for improved mercury ion analysis in the automated system without memory effect on the electrode. Mercury oxidation signal was found at the potential of 0.7 V in 0.1 M HNO3 and 1.0 M HCl with the concentration low to 0.25 …
Effect Of A-Site Modification On Structural And Microwave Dielectric Properties Of Calcium Titanate,
2022
Chulalongkorn University
Effect Of A-Site Modification On Structural And Microwave Dielectric Properties Of Calcium Titanate, Shailendra Rajput, Sunita Keshri
Journal of Metals, Materials and Minerals
This article presents studies on characteristics properties of CaTiO3, Ca0.8Sr0.2TiO3, and Ca0.6La0.8/3TiO3 ceramics. These ceramics were synthesized using the solid-state reaction process. Structural examination revealed that the grown ceramics have an orthorhombic structure with the Pbnm space group. The random distribution of particle size was shown through morphological investigation. Apparent density of developed ceramics was determined using the Archimedes technique and found to be ˂ 90%. The microwave dielectric properties of grown ceramics are compared on the basis of ionic polarizability. It is observed that partial replacement of Ca-ions by Sr-ions provides a high permittivity value (er = 168.93), higher …
Hole Transport Layers In Organic Solar Cells: A Review,
2022
Chulalongkorn University
Hole Transport Layers In Organic Solar Cells: A Review, Riva Alkarsifi, Jörg Ackermann, Olivier Margeat
Journal of Metals, Materials and Minerals
Thanks to huge research efforts, organic solar cells have become serious candidates in the field of renewable energy sources, with reported power conversion efficiencies above 19% and operating lifetime surpassing decades. In the thin film stack composing the organic solar cell, the transport layers at interfaces play a key role, as important as the photoactive material itself. Both electron (ETL) and hole (HTL) transport layers are indeed directly involved in the efficiency and stability of the devices, due to the very specific properties required for these interfaces. Focusing on the HTL interface, a large number of materials has been used …
Research Progress Of Novel Zirconium Alloys With High Strength And Toughness,
2022
Chulalongkorn University
Research Progress Of Novel Zirconium Alloys With High Strength And Toughness, Na Zhang, Chaoqun Xia, Jiaqian Qin, Qiang Li, Xinyu Zhang, Riping Liu
Journal of Metals, Materials and Minerals
Atoms of zirconium (Zr) are often known as "first metals of the atomic age". Because of its low cross section for thermal neutron absorption, excellent corrosion resistance, and good mechanical and processing properties, it is extensively used in the nuclear industry. As the properties requirements of materials in chemical, medical and aerospace fields turn out to be higher, the application of Zr alloys in these non-nuclear fields has become more and more widespread due to their excellent properties. In addition to having a high melting point, Zr alloys also have a high specific strength and low thermal expansion coefficient. Therefore, …
Rice Husk Ash Utilization, Composition And Properties: A Brief Review,
2022
Chulalongkorn University
Rice Husk Ash Utilization, Composition And Properties: A Brief Review, Vignesh Nayak Ullal, Shivaramu H. T., Aveen K. P.
Journal of Metals, Materials and Minerals
Asian countries rely massively on rice to feed and sustain its massive population. For long the staple food has provided nourishment to the masses and the classes. Rice is grown in large quantities in Asian countries. A by-product of its cultivation is its husk. The husk of the rice grain is mainly utilized as a fuel for the boilers in the rice mills. The uncontrolled burnt rice husk referred to as rice husk ash consists majorly of silica. silica is used in a wide variety of commercial and industrial applications. Use of rice husk ash in various products serves to …
Extraction Of Lutein Dye From Tagetes Erecta Garland Waste For Green Dyeing Of Hemp Fabric Using Response Surface Methodology,
2022
Chulalongkorn University
Extraction Of Lutein Dye From Tagetes Erecta Garland Waste For Green Dyeing Of Hemp Fabric Using Response Surface Methodology, Pisutsaran Chitichotpanya, Nattaya Vuthiganond, Thitirat Inprasit, Benjamas Klaykruayat, Seranee Srisuk
Journal of Metals, Materials and Minerals
Large quantities of discarded flowers from religious observances are left at temples and other places of worship, causing global disposal and environmental issues. Recycling and transforming such organic waste into value-added products is one of the most effective and beneficial solutions to the problem. The main goal of this study is to convert the most abundant temple wastes of marigold (Tagetes erecta) flowers into an eco-friendly dyestuff for the textile industry. Our study assessed the suitability of dye extract from garland waste for dyeing hemp fabric and valuated indicators including color strength (K/S) and fastness properties using tannic …
Development Of Fexoy Particle Onto Bacterial Cellulose Network By Forced Hydrolysis And Its Electrical Conductivity,
2022
Chulalongkorn University
Development Of Fexoy Particle Onto Bacterial Cellulose Network By Forced Hydrolysis And Its Electrical Conductivity, Prompong Khamwongsa, Poramed Wongjom, Andi Magattang Gafur Muchlisc, Chun Che Lin, Seranee Srisuk, Sarute Ummartyotin
Journal of Metals, Materials and Minerals
FexOy particle and bacterial cellulose composite sheet was successfully prepared by forced hydrolysis. The presence of Fe3+ ions in bacterial cellulose suspension significantly provided the positive charge due to electrostatic force as reported by Zeta potential. With the pH of 12 of bacterial cellulose suspension, particle was nucleated between bacterial cellulose networks. Fourier transform infrared exhibited Fe-O stretching. X-ray diffraction reported that the mixture of Fe2O3 and Fe3O4 was existed onto bacterial cellulose composite. Scanning electron microscope reported that FexOy particle was randomly distributed in bacterial cellulose network. Intensity of Fe was qualitatively observed by energy dispersive analysis. With the …
Morphology And Electrochromic Property Of Chemical Bath Deposited Nio Films At Different Niso4 Concentration,
2022
Chulalongkorn University
Morphology And Electrochromic Property Of Chemical Bath Deposited Nio Films At Different Niso4 Concentration, Watcharaporn Thongjoon, Kamon Aiempanakit, Itsarapong Chuasontia, Chantana Aiempanakit
Journal of Metals, Materials and Minerals
In this study, nickel oxide (NiO) films were prepared on indium tin oxide (ITO) glass by a chemical bath deposition (CBD) at different nickel sulfate (NiSO4) concentrations. The NiO films were verified for their structural properties with field emission scanning electron microscopy (FE-SEM) and X-ray diffraction (XRD) while the optical properties were investigated using a spectrophotometer. Moreover, the NiO films were studied to assess their electrochemical properties by cyclic voltammetry in potassium hydroxide (KOH) electrolyte. The results showed that annealed NiO films exhibited the dominant crystal structure of the (111) plane. Meanwhile, the NiSO4 concentration controlled morphological structure between dense …
Optimized Parameter Of Dissimilar Joining Between Al6061-T6 And Height-Strength Steel With Friction Stir Spot Welding Process (Fssw),
2022
Chulalongkorn University
Optimized Parameter Of Dissimilar Joining Between Al6061-T6 And Height-Strength Steel With Friction Stir Spot Welding Process (Fssw), Anusak Silachai, Suriya Prasomthong
Journal of Metals, Materials and Minerals
High-strength steel and aluminum alloys are used to manufacture modern vehicles. The objective was to reduce the weight and fuel consumption of the vehicles. In this study the optimum parameters for the friction stir spot welding (FSSW) process between Al6061-T6 aluminum alloy and HSS590 high-strength steel were determined. Response surface methodology based on central composite design (CCD) with three parameters, five levels, and 19 runs was used to conduct experiments and develop mathematical regression models. The three joint parameters were tool speed, welding feed, and dwell time. Analysis of variance was then performed to examine the adequacy of the developed …
