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Articles 9361 - 9373 of 9373
Full-Text Articles in Engineering
Preparation Of Bacterial Cellulose Film From Rotten Fruits For Mulching Film Application, Nattapong Pinpru, Varol Intasanta, Thitirat Charoonsuk, Supharada Khaisaat, Oubonwan Sawanakarn, Naratip Vittayakorn, Somsak Woramongkolchai
Preparation Of Bacterial Cellulose Film From Rotten Fruits For Mulching Film Application, Nattapong Pinpru, Varol Intasanta, Thitirat Charoonsuk, Supharada Khaisaat, Oubonwan Sawanakarn, Naratip Vittayakorn, Somsak Woramongkolchai
Journal of Metals, Materials and Minerals
This research aims to reduce production capital costs and added value to natural products. The bio-mulching film was prepared by bacterial cellulose (BC) “Acetobacter xylinum”, extracted from three rotten fruits, grape, coconut, and pineapple under standard tests in the laboratory. The analysis from the FTIR technique confirmed to cellulose molecular vibration of BC films. XRD pattern was matched to structure crystallinity of JCPDS standard file which possessed a high percentage of crystallinity. The SEM micrographs were also revealed the 3D nanofiber network structure. The absorption capability of BC films could highly hold water in its structure. In addition, …
Effect Of Pore Modifiers On Physical And Mechanical Properties Of High-Performance Cement Mortar, Kisun Chunti, Sureerat Polsilapa, Parinya Chakartnarodome, Passakorn Sonprasarn, Wichit Prakaypan, Edward A. Laitila
Effect Of Pore Modifiers On Physical And Mechanical Properties Of High-Performance Cement Mortar, Kisun Chunti, Sureerat Polsilapa, Parinya Chakartnarodome, Passakorn Sonprasarn, Wichit Prakaypan, Edward A. Laitila
Journal of Metals, Materials and Minerals
Two different pore modifiers (PM), artificial pozzolan (AP) and modified aluminum salt (MA), were introduced into the composition of a High Performance Cement Mortar (HPCM). The chemical compositions of raw materials, ordinary Portland cement (OPC), sea sand, AP, and MA were identified by X-Ray Fluorescence spectrometry (XRF). The hydration kinetics resulting from each PM added to the HPCM was investigated by the relevance of hydration temperature. The mechanical properties such as compressive strength, dynamic modulus of rupture, and dynamic modulus of elasticity were measured as well as water absorption and density. Additionally, Scanning Electron Microscope (SEM) and Brunauer-Emmett-Teller (BET) were …
The Effects Of Double Intercritical Annealing On Microstructure And Mechanical Properties Of 0.107c-2.39mn-0.453si Dual Phase Steel, Nithi Saenarjhan, Gobboon Lothongkum, Jatupon Opapaiboon
The Effects Of Double Intercritical Annealing On Microstructure And Mechanical Properties Of 0.107c-2.39mn-0.453si Dual Phase Steel, Nithi Saenarjhan, Gobboon Lothongkum, Jatupon Opapaiboon
Journal of Metals, Materials and Minerals
In this study, double intercritical annealing was applied to modify the mechanical properties of 0.107%C-2.39%Mn-0.453%Si dual phase steel. The effects of the double intercritical annealing (DIA) method were investigated via microstructure observation and tensile test, and then compared with the single intercritical annealing (SIA) method. By increasing the intercritical annealing temperature, yield and tensile strengths increase while ductility decreases primarily due to the increase of martensite fraction. DIA leads to a slight reduction of the ferrite size and the martensite fraction regardless of the intercritical annealing temperature. Tensile results showed that DIA increases ductility without losing significant amount of strength. …
Optimized Parameter Of Dissimilar Joining Between Al6061-T6 And Height-Strength Steel With Friction Stir Spot Welding Process (Fssw), Anusak Silachai, Suriya Prasomthong
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 …
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
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, Thitirat Rattanawongwiboon, Prim Chanklinhorm, Threeraphat Chutimasakul, Tanagorn Kwamman, Wilasinee Kingkam, Rattapon Khamlue, Sarute Ummartyotin
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 …
Synthesis And Characterization Of Hybrid Shell Microcapsules For Anti-Corrosion Ni-Co Coating, Hamed Sadabadi, Saeed Reza Allahkaram, Omid Ghader, Pradeep K. Rohatgi
Synthesis And Characterization Of Hybrid Shell Microcapsules For Anti-Corrosion Ni-Co Coating, Hamed Sadabadi, Saeed Reza Allahkaram, Omid Ghader, Pradeep K. Rohatgi
Journal of Metals, Materials and Minerals
This paper presents the results of the study of microcapsules synthesized using a novel hybrid shell of polyureaformaldehyde/SiO2 (PUF/SiO2) and a core of linseed oil. The synthesis was accomplished by facial polymerization combined with sol-gel of TEOS, and urea-formaldehyde resin to form the hybrid shell under optimal process parameters. The microcapsules were embedded in a metal coating using the electrodeposition method. Microcapsules were characterized by scanning electron microscope (SEM, FE-SEM), energy-dispersive spectroscopy (EDS), particle size analyzer (PSA), thermogravimetric analysis (TGA), and differential scanning calorimetry (DSC). The experimental results indicated that the average size of capsules synthesized umder the optimum processing …
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
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, Varittha Mitsaichon, Kanok-On Ruaesrijan, Pranee Phinyocheep, Taweechai Amornsakchai, Preeyanuch Junkong, Sombat Thanawan
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 …
Dyeing Of Curcumin And Durable Press Finishing With Citric Acid On Cotton Fabric Using One Step Process, Supannee Boonroeng, Piyaporn Kampeerapappun
Dyeing Of Curcumin And Durable Press Finishing With Citric Acid On Cotton Fabric Using One Step Process, Supannee Boonroeng, Piyaporn Kampeerapappun
Journal of Metals, Materials and Minerals
Cotton is an affordable and durable option for clothing. However, cotton garments tend to wrinkle easily. Therefore, cotton fabrics were studied to improve their wrinkle resistance properties. In this work, curcumin was mixed in an aqueous solution of citric acid and its catalyst and applied to cotton fabric using pad-dry-cure process for both the dyeing and finishing properties. Aloe vera extract and chitosan were used to compare for the reaction of their functional groups with carboxyl groups of citric acid on cotton fabrics. The mixture of curcumin and citric acid solution showed anti-wrinkle properties on the treated cotton. There were …
Mineralogical Studies And Optimization Of Tabling Parameters Of Low Grade Chromite Ore By Box Behnken Design Of Experiments, Amit Kumar Bhandary, Siddhartha Mukherjee, Rajib Dey, Mahua Ghosh Chaudhuri
Mineralogical Studies And Optimization Of Tabling Parameters Of Low Grade Chromite Ore By Box Behnken Design Of Experiments, Amit Kumar Bhandary, Siddhartha Mukherjee, Rajib Dey, Mahua Ghosh Chaudhuri
Journal of Metals, Materials and Minerals
Chromite ore is geologically associated with gangue materials which have lower density compared to pure chromite (FeO.Cr2O3). Gravity separation techniques are very suitable for beneficiation of low grade chromite ore. In the present study mineralogical analysis of the sample has been carried out by using Wavelength dispersive x-ray fluorescence (WDXRF), X-ray powder diffraction (XRD), Scanning electron microscopy (SEM) and Energy dispersive X-ray (EDX). The beneficiation of low grade (Cr2O3% 26.88) chromite ore has been investigated using wilfley table. Optimization has been carried out using box-behnken statistical design (BBD). The experimental parameters selected are: tilt angle, water flow rate and pre-heat …
Magnetic Nanoparticles Coated With Zwitterionic Copolymer As An Advanced Material For Rapid And Instrument-Free Biomolecular Detection In Human Serum, Supannika Boonjamnian, Varunee Sadsri, Voravee P. Hoven, Piyaporn Na Nongkhai
Magnetic Nanoparticles Coated With Zwitterionic Copolymer As An Advanced Material For Rapid And Instrument-Free Biomolecular Detection In Human Serum, Supannika Boonjamnian, Varunee Sadsri, Voravee P. Hoven, Piyaporn Na Nongkhai
Journal of Metals, Materials and Minerals
The traditional agglutination assays especially those based on polystyrene beads have been recognized as convenient tools for disease diagnosis despite their limited detection range and low sensitivity. Unlike other particles namely polystyrene beads, SiO2 and gold nanoparticles having insignificant magnetic properties, magnetic nanoparticles (MNPs) offer unique advantages as their magnetic properties for agglutination methods. In the presence of magnet, not only can they be used to enrich the samples, but also their aggregation can also be induced, providing sensitive and rapid measurements. This work aims to develop MNPs for aggregation-based biomolecular detection. The MNPs were surface-modified with PMAMPC via an …
Erratum To: In Search For Near-Room-Temperature Superconducting Critical Temperature Of Metal Superhydrides Under High Pressure: A Review, Udomsilp Pinsook
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.