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- Supercapacitor (6)
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- Asymmetric supercapacitor (2)
- Carbon dioxide (2)
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- Carboxyl methylcellulose (2)
- Conductivity (2)
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- 3R (1)
- 5-dichlorophenol (1)
- 5083 aluminum alloy (1)
- 57Fe25Cr15Ni alloy (1)
- AFM (1)
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- Accident proneness (1)
- Acetylide (1)
- Acid corrosion (1)
- Activated carbon (1)
- Activation energy (1)
- Active sites (1)
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- Journal of Electrochemistry (58)
- Makara Journal of Technology (24)
- Eurasian Journal of Physics and Functional Materials (18)
- Journal of Metals, Materials and Minerals (16)
- Journal of Applied Packaging Research (3)
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- Journal of Applied Science & Engineering Technology (1)
- Journal of the Arkansas Academy of Science (1)
- Journal of the South Carolina Academy of Science (1)
- McNair Scholars Research Journal (1)
- Montview Journal of Research & Scholarship (1)
- Rocky Mountain Conference on Magnetic Resonance (1)
- The Hilltop Review (1)
- The STEAM Journal (1)
Articles 1 - 30 of 127
Full-Text Articles in Engineering
Effect Of Peg-Coating On Properties Of Lithium-Sulfur Battery Cathode Material Containing Carbon Fiber Conductive Agent, Jie-Cheng Tan, Yan-Hong Tian, Xue-Jun Zhang, Kai-Le Fan
Effect Of Peg-Coating On Properties Of Lithium-Sulfur Battery Cathode Material Containing Carbon Fiber Conductive Agent, Jie-Cheng Tan, Yan-Hong Tian, Xue-Jun Zhang, Kai-Le Fan
Journal of Electrochemistry
The composite materials contained high modulus carbon fiber (HMCF) were successfully prepared by employing a ball-milling process based on the coating treatment of polyethylene glycol (PEG), and their structures and morphologies were characterized by scanning electron microscopy (SEM), X-ray powder diffraction (XRD), and X-ray photoelectron spectroscopy (XPS) techniques．The influences of PEG content on sulfur cathode capacity, cycle stability and rate performance were systematically studied. It was found that by the pre-coating of PEG, the cathode exhibited the high initial discharge specific capacity of 1312.5 mAh•g-1 at a current rate of 0.2C, and the reversible discharge capacity of 650 mAh•g …
Effect Of Fe2+/Fe3+Interconvertion On Reduction Behavior Of Fe3+ In Acidic Electrolytes, Jian-Xin Qin, Feng Lin, Wen-Ping Liu, Chao Chen, Meng-De Ren
Effect Of Fe2+/Fe3+Interconvertion On Reduction Behavior Of Fe3+ In Acidic Electrolytes, Jian-Xin Qin, Feng Lin, Wen-Ping Liu, Chao Chen, Meng-De Ren
Journal of Electrochemistry
The influences of ferrous/ferric (Fe2+/Fe3+) interconvertion on electrochemical reduction and electrode reaction of Fe3+ were investigated by using linear sweep voltammetry, potentiostatic method and cyclic voltammetry (CV) in acidic electrolytes containing chloride ion (Cl- ) and sulfate ion (SO42-). It was shown that the reduction process of Fe3+/Fe2+ would take place in two independent stages: (1) the reduction of Fe3+ to Fe2+ at E=0.35V and (2) the co-precipitation of Fe2+ by forming Fe(OH)2 (E≤-0.3 V) instead of Fe. The major effect of Fe2+ …
Electroactivities Of Pd/Fe3O4-C Catalysts For Electro-Oxidation Of Methanol, Ethanol And Propanol, Tao Zou, Qing-Feng Yi, Yuan-Yuan Zhang, Xiao-Ping Liu, Guo-Rong Xu, Hui-Dong Nie, Xiu-Lin Zhou
Electroactivities Of Pd/Fe3O4-C Catalysts For Electro-Oxidation Of Methanol, Ethanol And Propanol, Tao Zou, Qing-Feng Yi, Yuan-Yuan Zhang, Xiao-Ping Liu, Guo-Rong Xu, Hui-Dong Nie, Xiu-Lin Zhou
Journal of Electrochemistry
Development of palladium (Pd) catalysts with high electroactivity for alcohol oxidation is significant for alcohol fuel cells. In this work, Pd nanoparticles were formed by sodium borohydride (NaBH4) reduction method and subsequently deposited on the surface of carbon supported ferriferrous oxide (Fe3O4/C) composites to obtain the Pd/Fe3O4-C catalysts with different Fe3O4 loadings. Their transmission electron microscopic (TEM) images show that the Pd nanoparticles were uniformly dispersed on the Fe3O4/C. Electroactivities of the prepared Pd/Fe3O4-C catalysts toward oxidations of C1-C3 …
Effect Of Calcium On Atmospheric Corrosion Resistance Of Bridge Steel, Dong-Liang Li, Gui-Qin Fu, Miao-Yong Zhu
Effect Of Calcium On Atmospheric Corrosion Resistance Of Bridge Steel, Dong-Liang Li, Gui-Qin Fu, Miao-Yong Zhu
Journal of Electrochemistry
The corrosion behavior of bridge steel in simulated hot and humid industrial-marine atmosphere was investigated by mass loss analysis, XRD, SEM, electrochemical methods and a wet/dry alternate immersion corrosion test using 0.1 mol•L-1 NaCl+0.01 mol•L-1 NaHSO3 solutions. The corrosion depth (W) of experimental steels before and after calcium treatment versus time (t) curves showed a good agreement with the power function of W=Atn. The corrosion products were mainly composed of amorphous phase and a small amount of crystals including α-FeOOH, β-FeOOH, γ-FeOOH and Fe3O4. Trace calcium could promote the formation of …
Effects Of Jet Milling And Classifying Process On The Performance Of Lifepo4/C In Full Batteries, Xing-Liang Liu, Mao-Ping Yang, Wei-Wei Wang, Yong Cao
Effects Of Jet Milling And Classifying Process On The Performance Of Lifepo4/C In Full Batteries, Xing-Liang Liu, Mao-Ping Yang, Wei-Wei Wang, Yong Cao
Journal of Electrochemistry
The carbon coated lithium iron phosphate (LiFePO4/C) composite cathode material was prepared by using iron phosphate process. The effects of jet milling and classifying process on the electrochemical performance of LiFePO4/C cathode material in full batteries were investigted. Scanning electron microscopic analyses suggested that the globose secondary particles were crustily crushed during the jet milling and classifying process, which would further result in lower tap density and carbon content. The LiFeP4/C composite cathode materials with different physical characteristics were further tested in full batteries to evaluate the electrochemical properties. The results showed no obvious …
Engineering The Electrochemical Capacitive Properties Of Activated Carbon By Correct Selection Of Ionic-Liquid Electrolytes, Qiu-Hong Zhang, Bao-Shou Shen, Song-Lin Zuo, Xin-Yu Wei
Engineering The Electrochemical Capacitive Properties Of Activated Carbon By Correct Selection Of Ionic-Liquid Electrolytes, Qiu-Hong Zhang, Bao-Shou Shen, Song-Lin Zuo, Xin-Yu Wei
Journal of Electrochemistry
In order to improve the electrochemical capacitive properties and to apply coconut shell activated carbon (AC) serving as electrode materials in ionic liquid (IL)-based supercapacitor (SC), the coconut shell AC material was re-activated using a steam as an activating agent in this work, forming a secondary AC (W-AC). The results showed that the specific capacitance of the W-AC electrode was much larger than that of the raw activated carbon electrode (R-AC) in 1-ethyl-3-methylimidazolium tetrafluoroborate ([EMIM]BF4). The electrochemical techniques including cyclic voltammetry (CV), galvanostatic charge/discharge (GCD) measurement, and electrochemical impedance spectroscopy (EIS) were used to systematically study the capacitive …
Kinetics And Mechanism Toward Electrochemical Reductions Of Sodium Bromide And Methanol Over Iron Electrodes, Qun Liao, Shu-Feng Zhang, Wen-Hua Leng
Kinetics And Mechanism Toward Electrochemical Reductions Of Sodium Bromide And Methanol Over Iron Electrodes, Qun Liao, Shu-Feng Zhang, Wen-Hua Leng
Journal of Electrochemistry
It is of technological value and scientific interest to the electro-synthesis of ferrocene, conversion of carbon dioxide (CO2) and organic electro-synthesis in non-aqueous solutions by investigating the kinetics and mechanism toward electrochemical reductions of sodium bromide (NaBr) and methanol over iron electrodes. However, few reports in the related researches are available. In this article, the kinetics and mechanism toward electrochemical reductions of NaBr and methanol over iron electrodes were examined in detail by carrying out the polarization curve and electrochemical impedance spectroscopic measurements. The results showed that methanol was the reactant, while Na+ ions were functioned only …
Capacity Fading Analyses Of Lini 0.5Co 0.2Mn 0.3O2And Lini 0.5Co 0.2Mn 0.3O2/Lifepo4 Cathode Materials For Lithium-Ion Battery, Yi Hu, Xiang-Zhu He, Zhong-De Deng, Ling-Yong Kong, Wei-Li Shang
Capacity Fading Analyses Of Lini 0.5Co 0.2Mn 0.3O2And Lini 0.5Co 0.2Mn 0.3O2/Lifepo4 Cathode Materials For Lithium-Ion Battery, Yi Hu, Xiang-Zhu He, Zhong-De Deng, Ling-Yong Kong, Wei-Li Shang
Journal of Electrochemistry
The LiNi 0.5Co 0.2Mn 0.3O2/LiFePO4 (NMC532/LFP) composite cathode material for lithium-ion battery was prepared by wet ball-milling. The capacity fading behaviors of LiNi 0.5Co 0.2Mn 0.3O2 (NMC532) and LiNi 0.5Co 0.2Mn 0.3O2/LiFePO4 (NMC532/LFP) were analyzed by X-ray diffraction (XRD), scanning electron microscope (SEM), charge/discharge and electrochemical impedance spectroscopy (EIS) tests. The results indicated that the capacity retention values of NMC532/LFP were 97.80% and 86.48%, respectively, after 50 cycles and 60℃ high temperature storage. The NMC532/LFP exhibited better cycle performance and high temperature storage performance. …
Core-Shell Pd@Pt Ultrathin Nanowires As Durable Oxygen Reduction Electrocatalysts, Xin Wang, Yun-Jie Xiong, Liang-Liang Zou, Qing-Hong Huang, Zhi-Qing Zou, Hui Yang
Core-Shell Pd@Pt Ultrathin Nanowires As Durable Oxygen Reduction Electrocatalysts, Xin Wang, Yun-Jie Xiong, Liang-Liang Zou, Qing-Hong Huang, Zhi-Qing Zou, Hui Yang
Journal of Electrochemistry
This paper describes a simple CO-assisted reduction approach for the controllable synthesis of ultrathin Pd nanowires along the one-dimensional (1D) direction. Ultrathin Pt films from one to several atomic layers were successfully decorated onto ultrathin Pd nanowires by utilizing Cu UPD deposition, and followed by in-situ redox replacement reaction of UPD Cu by Pt. The core–shell structure and composition of the Pd@Pt ultrathin nanowires have been verified using transmission electron microscopy and energy dispersive X-ray spectrometry. The core–shell Pd@Pt ultrathin nanowires exhibited comparative electrocatalytic activity and improved durability for the oxygen reduction reaction in comparison with commercial Pt black. The …
Cobalt-Based Nitrogen-Doped Carbon Non-Noble Metal Catalysts For Oxygen Reduction Reaction, Meng-Xiu Jiang, Jing Zhang, Yue-Hua Li, Rong Zhang
Cobalt-Based Nitrogen-Doped Carbon Non-Noble Metal Catalysts For Oxygen Reduction Reaction, Meng-Xiu Jiang, Jing Zhang, Yue-Hua Li, Rong Zhang
Journal of Electrochemistry
Transition metal-nitrogen co-doped carbon catalysts have attracted significant attention because of their reasonable activity and remarkable selectivity toward oxygen reduction reaction (ORR) as cathodic reaction in fuel cells. However, the role of transition metal in the active sites of the catalysts still is uncertain. In this work, the Cox-Ny/C-T catalysts were prepared with BP2000 as a carbon source, urea (Ur) as a nitrogen source and Co(OAc)2•4H2O as a metal precursor by a simple chemical method. Meanwhile, in order to optimize the ORR activity, the catalysts were synthesized with different amounts of Co …
Effect Of Allyl Thiourea On Nickel Electrodeposition From Solution Containing Ammonia And Chloride, Ya-Ning He, Liang Yuan, Zhi-Ying Ding, Shi-Jun Liu
Effect Of Allyl Thiourea On Nickel Electrodeposition From Solution Containing Ammonia And Chloride, Ya-Ning He, Liang Yuan, Zhi-Ying Ding, Shi-Jun Liu
Journal of Electrochemistry
The effects of allylthiourea (ATU) concentration on the cathodic polarization behaviour, nucleation and surface morphology of nickel electrodeposited on the glassy carbon electrode from ammonia-ammonium chloride-water (NH3-NH4Cl-H2O) solutions were investigated by cyclic voltammogry, cathodic polarization and current transient methods. The results revealed that the addition of ATU inhibited nickel deposition, which was enhanced with an increase in ATU concentration from 5 to 50 mg•L-1. The initial deposition kinetics corresponded to a model including instantaneous nucleation and diffusion controlled growth. In the presence of ATU, the initial nucleation of nickel electrocrystallisation remained unchanged. …
Preparation Of Nis2 Nanosheet And Its Application In Asymmetric Supercapacitor, Yuan-You Wang, Ya-Nan Liu, Dang-Qin Jin
Preparation Of Nis2 Nanosheet And Its Application In Asymmetric Supercapacitor, Yuan-You Wang, Ya-Nan Liu, Dang-Qin Jin
Journal of Electrochemistry
In this work, the NiS2 nanosheets have been synthesized using Ni(OH)2 as a precursor through a sacrificial template method. The microstructure and chemical composition of as-prepared NiS2 were characterized by XRD, EDS, BET, SEM and TEM techniques. The results showed that both Ni(OH)2 and NiS2 were composed of nanoplates. The electrochemical tests revealed that NiS2 exhibited the high specific capacitance of 1067.3 F•g-1 at a current density of 1 A•g-1 and excellent rate performance. Furthermore, in order to evaluate the practical application of NiS2, an asymmetric supercapacitor, NiS2 as …
Applications Of N-Methyl-N-Butyl-Pyrrolidinium Bromide And N-Methyl-N-Ethyl-Pyrrolidinium Bromide In Zn-Br Flow Batteries, Zhang Qi, Miao-Miao Zhang, Meng Lin
Applications Of N-Methyl-N-Butyl-Pyrrolidinium Bromide And N-Methyl-N-Ethyl-Pyrrolidinium Bromide In Zn-Br Flow Batteries, Zhang Qi, Miao-Miao Zhang, Meng Lin
Journal of Electrochemistry
It is extremely important for battery performance and safety in Zn-Br flow battery to use quaternary ammonium salts as complex agents for bromine. In this work, the effects of electrolyte compositions and concentrations on the electrode reactions and battery performances were studied in the absence and presences of N-methyl-N-ethyl-pyrrolidinium bromide (MEP) or N-methyl-N-butyl-pyrrolidinium bromide (MBP). The conductivities in the electrolytes containing different constitutions and concentrations were measured by EIS method. The charge-discharge performance for the battery and the complex ability for bromine in different electrolytes were also investigated. The results showed that the electrolyte containing MBP was better than that …
3d Printing – An Insider’S Perspective, Siddharth Sah
3d Printing – An Insider’S Perspective, Siddharth Sah
The STEAM Journal
The 3D printing market globally is still at its infancy, - or some might argue that there isn’t really a market yet. The knowledge of 3D printing design is still largely limited to engineering design – not product design. At MakeWhale, we are constantly pushing the boundaries of the application of 3D printing technology to consumer products resulting in a beautiful mix of technology and art.
Assessment On Heck-Immine Derivatives As Organic Semiconductor Materials, Rafizah Rahamathullah, Lim Keemi, Wan M. Khairul
Assessment On Heck-Immine Derivatives As Organic Semiconductor Materials, Rafizah Rahamathullah, Lim Keemi, Wan M. Khairul
Makara Journal of Technology
This paper reports the synthetic, characterization and theoretical evaluation of new class of hybrid Heck-immine system involving mixed moieties of vinylene (C=C) and azomethines (CH=N) which has been successfully integrated into an addition of organic semiconducting materials. The assessment of 4-[(hexyloxyphenyl)methylene]amino)-4’-chloro-stilbene (HEXCS) based on Donor (D)-π-Acceptor (A) was evaluated as active semiconductor material candidates via several spectroscopic and analytical techniques. In turn, the investigation of its potential as dopant system in conductive film was successfully deposited on indium tin oxide (ITO) coated substrate via spin coating method. The relationship between electronic and optical properties, chemical modelling at molecular interactions and …
Energy Potentials Of Briquette Produced From Tannery Solid Waste, Olatunde Ajani Oyelaran, Faralu Muhammed Sani, Olawale Monsur Sanusi, Olusegun Balogun, Adeyinka Okeowo Fagbemigun
Energy Potentials Of Briquette Produced From Tannery Solid Waste, Olatunde Ajani Oyelaran, Faralu Muhammed Sani, Olawale Monsur Sanusi, Olusegun Balogun, Adeyinka Okeowo Fagbemigun
Makara Journal of Technology
The vast quantity of waste generated from industries is one of the serious outcomes of unplanned development, resulting into quantum of hazardous organic and inorganic waste generating daily. Proper waste management is a challenging issue that must be addressed adequately. This is, therefore, carried out with a view of assessing the energy and combustion quality of tannery solid waste with a view of converting them into briquettes for cooking, heating and small home industries and reducing the menace caused by tannery waste disposal. The results of the experiments showed that the combustion rate ranged between 0.171 and 0.217 g/min, the …
Experimental Study On Automatic Control For Collision Avoidance Of Ships, Daeng Paroka, Muhammad Fahmi Kamil, Andi Haris Muhammad
Experimental Study On Automatic Control For Collision Avoidance Of Ships, Daeng Paroka, Muhammad Fahmi Kamil, Andi Haris Muhammad
Makara Journal of Technology
Automatic control system is widely applied to control the ship direction or heading angle in accordance with the decided trajectory. Several methods for improving performance of control system have been developed such as Proportional-Integral-Derivative (PID) control and fuzzy logic based control. Within the last decade, application of automatic control system is not only for ship navigation but also for avoiding collision risk of ships in seaways. This paper discusses the application of automatic control system for avoiding ship collision by free running experiment. Fuzzy logic based control was developed using Mamdani Centroid method to estimate the necessary rudder angle in …
Study On Semiconductor Properties Of Acetylide-Thiourea Fabricated Onto Interdigitated Electrodes (Ides) Platform Towards Application In Gas Sensing Technology, Adibah Izzati Daud, Wan M. Khairul, M. I. N. Isa, Khairul Anuar Abdul Wahid
Study On Semiconductor Properties Of Acetylide-Thiourea Fabricated Onto Interdigitated Electrodes (Ides) Platform Towards Application In Gas Sensing Technology, Adibah Izzati Daud, Wan M. Khairul, M. I. N. Isa, Khairul Anuar Abdul Wahid
Makara Journal of Technology
In the past few decades, the unique properties of acetylide and thiourea moieties individually have attracted great attention from researchers in various fields to be developed in numerous applications in advanced materials technology, especially as an active layer in gas sensing devices. The molecular systems of acetylide and thiourea provide a wide range of electronic properties as they possess rigid π-systems in their designated structures. In this study, a derivative of acetylide-thiourea featuring N-(4[4-aminophenyl] ethynyl benzonitrile)-N’-(4-ethyl benzoyl) thiourea (TCN) has been synthesised with the general formula of ArC(O)NHC(S)NHC≡C)Ar adopted the system of D-π-A for the significant development of conductive materials. …
Experimental Study Of The Chimney Height Variation Against Double Pots Biomass Stove Performance, Faisal Faisal, Adi Setiawan, Wusnah Wusnah, Khairil Khairil, Luthfi Luthfi, Mona Fajriana
Experimental Study Of The Chimney Height Variation Against Double Pots Biomass Stove Performance, Faisal Faisal, Adi Setiawan, Wusnah Wusnah, Khairil Khairil, Luthfi Luthfi, Mona Fajriana
Makara Journal of Technology
This research aims to get optimal chimneys height of double pots biomass stove. Optimal chimneys height needs to provide best performance of the stove. Experimental study was done by varied the chimney heights. Water boiling test as the standard method was used to obtained stove performance for each chimney height variation. The results showed that best performance stove was the one with 1.65 cm chimney height, with thermal efficiency at 37.66%.
Adsorption Of Cu(Ii) Ions In Aqueous Solution Onto Limonia Acidissima Shellbased Activated Carbon: Kinetic And Isotherm Studies, Abrar Muslim, Syahiddin Dahlan Said, Gita Suci Hariati, Siti Fajar Karina, Fauzi Muhammad Djuned, Rizka Mulyawan
Adsorption Of Cu(Ii) Ions In Aqueous Solution Onto Limonia Acidissima Shellbased Activated Carbon: Kinetic And Isotherm Studies, Abrar Muslim, Syahiddin Dahlan Said, Gita Suci Hariati, Siti Fajar Karina, Fauzi Muhammad Djuned, Rizka Mulyawan
Makara Journal of Technology
Adsorption of Cu(II) ions from aqueous solution using activated carbon prepared from Limonia acidissima fruit shell (LAFS-AC) was conducted in batch mode experiments at pH 5 (±0.15), 100 rpm and 1 atm. The effects of contact time, initial Cu(II) ions concentration, KOH concentration, and adsorption temperature on Cu(II) ions adsorption capacity were investigated. Fourier Transform Infrared Spectroscopy and Scanning Electron Microscopy analyses were performed to investigate the active site and surface morphology of the LAFS-AC, respectively. The Cu(II) ions adsorption was fitted very well (R2 = 0.94 on average) to the pseudo second-order adsorption kinetic with the adsorption capacity and …
Innovation Of Hydrocarbon Investigation Using Audio-Magnetotelluric In Cepu Field, Indonesia, Iqbal Fauzi Aditama, Widodo Widodo
Innovation Of Hydrocarbon Investigation Using Audio-Magnetotelluric In Cepu Field, Indonesia, Iqbal Fauzi Aditama, Widodo Widodo
Makara Journal of Technology
An audio-magnetotelluric (AMT) survey has been performed at Cepu oil field located in Indonesia. The objective of this research is to detect resistivity structures of this important hydrocarbon rock. This research can be classified as an innovation in application of the AMT method for hydrocarbon exploration. The lack of seismic resolution has been provided by the AMT method, especially in the location of sub-basalt and sub-salt plays. In additional, the cost of AMT survey is quite low compared to seismic. The forward modelling is included in this research to understand the measurement data response from a mathematical model. In the …
Indonesia’S Municipal Solid Waste 3r And Waste To Energy Programs, Farizal Farizal, Radityo Aji, Amar Rachman, Nasruddin Nasruddin, Teuku Meurah Indra Mahlia
Indonesia’S Municipal Solid Waste 3r And Waste To Energy Programs, Farizal Farizal, Radityo Aji, Amar Rachman, Nasruddin Nasruddin, Teuku Meurah Indra Mahlia
Makara Journal of Technology
Like most cities in the world, population in Indonesia continues to grow every year. Problems that can arise from this are the increasing amount of municipal solid waste (MSW) production and the growing demand for electricity. To deal with the problems, Indonesian government runs 3R (Reduce, Reuse and Recycle) and WTE (Waste to Energy) Programs simultaneously. 3R program aims to reduce the number of waste, while WTE program aims to generate electricity as an alternative energy source. This study aims to find out the optimal proportion of MSW treated through the 3R and WTE programs. For the purpose, a goal …
Antibacterial Activity Of Zno Nanoparticles On Silica Thin Film For Wastewater Treatment, S Chanrawangyot, S Rattanachan, A Watcharenwong, T Fangsuwannarak
Antibacterial Activity Of Zno Nanoparticles On Silica Thin Film For Wastewater Treatment, S Chanrawangyot, S Rattanachan, A Watcharenwong, T Fangsuwannarak
Journal of Metals, Materials and Minerals
Zinc Oxide nanoparticles on silica matrix thin films were prepared by the Sol-gel method and dip coating on ceramic tiles. In this study, EC (Ethyl cellulose) and TP (alpha-terpineol) used as a binder and a solvent in Sol-gel method, respectively, were studied on the characteristics of thin films. The thin films were dried and calcined at the temperature of 500, 600˚C soaking 30 minutes with the heating rate of 1˚C/minutes. The result of Glancing X-Ray Diffraction showed that thin films were ZnO phase on the amorphous phase of silica matrix. Scanning electron microscope showed the ZnO nanoparticles dispersed on thin …
Development Of Wo3 Nanostructure By Acid Treatment And Annealing, T Sanasi, S Pinitsoontorn, M Horprathum, P Eiamchai, C Chananonnawathorn, W Hincheeranun
Development Of Wo3 Nanostructure By Acid Treatment And Annealing, T Sanasi, S Pinitsoontorn, M Horprathum, P Eiamchai, C Chananonnawathorn, W Hincheeranun
Journal of Metals, Materials and Minerals
Tungsten oxide (WO3) nanostructure is an interesting material for many applications such as batteries, gas sensors, photocatalysts, display utilizing, and smart windows. In this work, we fabricated the WO3 nanoplates by sputtering, acid treatment and annealing. Firstly, a tungsten film was deposited on a silicon or glass substrate by sputtering. The film was then immersed in nitric acid (HNO3) at 80 °C. The effect of the exposure time, and annealing temperature was investigated. After the acid treatment, the tungsten oxide hydrate or tungstile (WO3•H2O) with nanoplate structure was developed. The optical transmittance in the visible range was significantly improved compared …
Utilization Of Aluminium Dross As A Main Raw Material For Synthesis Of Geopolymer, P Puksisuwan, P Laoratanakul, B Cherdhirunkorn
Utilization Of Aluminium Dross As A Main Raw Material For Synthesis Of Geopolymer, P Puksisuwan, P Laoratanakul, B Cherdhirunkorn
Journal of Metals, Materials and Minerals
Aluminium dross contains both small particles and large agglomerates, where the recyclable part is the large agglomerates with high aluminium metal content. The residual Al dross is unrecyclable small particles with very low aluminium metal content. In this research, the residual Al dross from the aluminium recycle industry and the bagasse ash from a biomass power plant were used as main raw materials for geopolymer fabrication with alkaline solutions (Na2SiO3 and NaOH) using in the typical geopolymerization process. After mixing with alkaline solutions, the mixtures were uniaxially pressed into a cylinder die. The samples were cured for 3, 7, 14 …
Physical And Optical Properties Of 20cao-(80-X)B2o3-Xzno Glass System, N Jearnkulprasert, O Chaemlek, N Wantana, J Kaewkhao
Physical And Optical Properties Of 20cao-(80-X)B2o3-Xzno Glass System, N Jearnkulprasert, O Chaemlek, N Wantana, J Kaewkhao
Journal of Metals, Materials and Minerals
The 20CaO-(80-x)B2O3-xZnO glasses were prepared by melt quenching technique (where x=0, 5, 15 and 20 mol%) in order to study in the physical and optical properties. These glass compositions were heated to 1200 ºC for 3 hours and annealed at 500ºC for 3 hours. Clear glass samples were obtained from these compositions. The density, molar volume, refractive index, optical spectra (in the wavelength of 190-1100 nm), optical band gap, optical basicity and polarizability of glass samples have been investigated in this work.
Properties Of Natural Rubber Latex Filled With Bacterial Cellulose Produced From Pineapple Peels, T Saowapark, E Chaichana, A Jaturapiree
Properties Of Natural Rubber Latex Filled With Bacterial Cellulose Produced From Pineapple Peels, T Saowapark, E Chaichana, A Jaturapiree
Journal of Metals, Materials and Minerals
Bacterial cellulose (BC) is natural biopolymers with unique properties such as high purity and high tensile strength. These properties considerably support for use as filler in rubber applications. In this research, BC was produced from fermentation by Acetobacter xylinum. Additionally, pineapple peels (agricultural waste) were evaluated for carbon sources in BC's production process. Natural rubber latex (NRL) compound was then incorporated BC with various loadings of 0, 5, 10 and 15 phr (parts per hundred of rubber) for enhancement properties of NRL. Furthermore, NRL filled with BC (NRL-BC) compounds were prevulcanized at 70°C for 2 hours and then NRL-BC sheets …
Kinetic Study Of Chitosan-Alginate Biopolymeric Nanoparticles For The Controlled Release Of Curcumin Diethyl Disuccinate, S Bhunchu, P Rojsitthisak, P Rojsitthisak
Kinetic Study Of Chitosan-Alginate Biopolymeric Nanoparticles For The Controlled Release Of Curcumin Diethyl Disuccinate, S Bhunchu, P Rojsitthisak, P Rojsitthisak
Journal of Metals, Materials and Minerals
The aim of this study was to investigate the release profile, and evaluate the best fitted kinetic model and mechanism, of curcumin diethyl disuccinate (CDD) from chitosan-alginate biopolymeric nanoparticles (CANPs) in simulated gastrointestinal fluids (without enzymes) and simulated body fluid. The CDD-loaded CANPs (CDD-CANPs) were prepared by oil-in-water emulsification and ionotropic gelation under the previously reported optimal condition (3 mg/mL of CDD, 4.05% (w/v) of TweenTM 80 and a chitosan:alginate mass ratio of 0.05:1), which resulted in CDD-CANPs with a favorable particle size (327±14 nm), zeta potential (-27.3±0.2 mV), encapsulation efficiency (51.2±2.2%) and loading capacity (11.2±0.8%). The in vitro release …
Investigation Of The Durability Of Sisal Fiber/Pla Biocomposite Through Evaluation Of Biodegradability By Means Of Microbial Growth, T Kittikorn, S Kongsuwan, R Malakul
Investigation Of The Durability Of Sisal Fiber/Pla Biocomposite Through Evaluation Of Biodegradability By Means Of Microbial Growth, T Kittikorn, S Kongsuwan, R Malakul
Journal of Metals, Materials and Minerals
The aim of this work was to investigate the microbial biodegradation of 3-(trimethoxysilyl) propyl methacrylate (TPM) modified (silanized) sisal fibres/PLA biocomposites by Aspergillus niger. The modification of the sisal fibres performed excellently, improving hydrophobicity as well as mechanical properties. Compared to the unmodified sisal/PLA biocomposite, it produced superior interfacial adhesion between the fibres and the PLA matrix. In addition, silanization also increased the crystal size and crystallinity in the biocomposite, which decreased thermal decomposition to an observed maximal activation energy of 213 kJ/mol. This indicated the stability of silanized sisal biocomposite in resisting degradation. After the microbial growth test, despite …
Morphological, Thermal And Oxygen Barrier Properties Plasticized Film Polylactic Acid, Kurniawan Yuniarto, Bruce A. Welt, Foliatini -, Hanafi -, Candra Irawan
Morphological, Thermal And Oxygen Barrier Properties Plasticized Film Polylactic Acid, Kurniawan Yuniarto, Bruce A. Welt, Foliatini -, Hanafi -, Candra Irawan
Journal of Applied Packaging Research
Introducing plasticizer poly(ethylene glycol) (PEG400) was applied into poly(lactic acid) (PLA) to produce film matrix packaging by direct casting. Non mechanical properties were carried out plasticized PLA including morphology, crystallinity structure and degree, thermal properties and oxygen barrier properties. Plasticized PLA revealed improving surface structure of PLA film matrix form fractures and homogenous film were achieved at 5% PEG 400. Chromatogram PLA and plasticized PLA were categorized crystal structure an α-form crystal. Intercalated and exfoliated structure did not occur significantly due to dispersion PEG 400 in the matrix but indicated dispersion structure. Thermal properties did not improve plasticized PLA significantly …