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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Applied Chemistry for Engineering
Journal Basic Information
Journal DOI :
The Korean Society of Industrial and Engineering Chemistry
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Volume & Issues
Volume 27, Issue 4 - Aug 2016
Volume 27, Issue 3 - Jun 2016
Volume 27, Issue 2 - Apr 2016
Volume 27, Issue 1 - Feb 2016
Selecting the target year
Melanin: A Naturally Existing Multifunctional Material
Eom, Taesik ; Woo, Kyungbae ; Shim, Bong Sup ;
Applied Chemistry for Engineering, volume 27, issue 2, 2016, Pages 115~122
DOI : 10.14478/ace.2016.1029
Melanin is a common name used for a certain type of natural dark pigments existing in living organisms, particularly in human hair, eyes, and skin. The unique free radical scavenging effect of melanine could help protecting cells and tissues from harmful UV light. While their exact molecular structures in nature are not still well defined, their multifunctional properties including electrical and ionic conductivities, antioxidation, wet adhesion, and metal ion chelation, are highlighted for the potential applications in bioorganic electronics including biomedical sensors and devices. In this mini-review, we will discuss sources, synthesis methods, structures and multifunctional properties of melanin materials in addition to current research directions on a wide range of applications.
Competitiveness of Formic Acid Fuel Cells: In Comparison with Methanol
Uhm, Sunghyun ; Seo, Minhye ; Lee, Jaeyoung ;
Applied Chemistry for Engineering, volume 27, issue 2, 2016, Pages 123~127
DOI : 10.14478/ace.2016.1021
Methanol fuel cells having advantages of relatively favorable reaction kinetics and higher energy density have attracted increasing interests as best alternative to hydrogen fuel cell because of H2 production, storage and distribution issues. While there have been extensive research works on developing key components such as electrocatalysts as well as their physicochemical properties in practical formic acid fuel cells, there have also been urgent requests for investigating which fuel sources will be more suitable for direct liquid fuel cells in future. In this mini-review, we highlight the overall interest and outlook of formic acid fuel cells in terms of electrocatalysts, fuel supply and crossover, water management, fuel cell efficiency and system integration in comparison with methanol fuel cells.
Research Trends of Technology Using Oxygen for Dehydrogenation of Light Alkanes
Koh, Hyoung Lim ;
Applied Chemistry for Engineering, volume 27, issue 2, 2016, Pages 128~134
DOI : 10.14478/ace.2016.1004
Due to the great development made in converting the shale gas into the more valuable products, research and commercialization for production technology of olefins like propylene, butenes, butadiene from light alkanes have been intensively investigated. Especially the technology using oxygen like oxidative dehydrogenation or selective hydrogen combustion to overcome thermodynamic limit of direct dehydrogenation conversion has been extensively studied and some cases of applying this technology to the plant scale was reported. In this review, we have categorized the technology into two parts; gas phase oxygen utilization technology and lattice oxygen utilization technology. The trends, results and future direction of the technology are discussed.
Value-added Utilization of Lignin Residue from Pretreatment Process of Lignocellulosic Biomass
Jung, Jae Yeong ; Lee, Yumi ; Lee, Eun Yeol ;
Applied Chemistry for Engineering, volume 27, issue 2, 2016, Pages 135~144
DOI : 10.14478/ace.2016.1016
Due to the high price volatility and environmental concern of petroleum, biofuels such as bioethanol produced from lignocellulosic biomass have attracted much attention. It is also expected that the amount of lignin residue generated from pretreatment of lignocellulosic biomass will increase as the volume of cellulosic bioethanol increases. Lignin is a natural aromatic polymer and has very complex chemical structures with chemical functional groups. Chemical modification of lignin such as oxypropylation and epoxidation has also been applied to the production of value-added bioplastics such as polyurethane and polyester with enhanced thermal and mechanical properties. In addition, lignin can be used for carbon fiber production in automobile industries. This review highlights recent progresses in utilizations and chemical modifications of lignin for the production of bioplastics, resins, and carbon fiber.
Improvement in Sensitivity of Electrochemical Glucose Biosensor Based on CuO/Au@MWCNTs Nanocomposites
Park, Mi-Seon ; Bae, Tae-Sung ; Lee, Young-Seak ;
Applied Chemistry for Engineering, volume 27, issue 2, 2016, Pages 145~152
DOI : 10.14478/ace.2015.1117
In this study, CuO was introduced on MWCNTs dispersed with Au nanoparticles to improve the glucose sensing capability of electrochemical biosensors. Nano-cluster shaped CuO was synthesized due to the presence of Au nanoparticle, which affects glucose sensing performance. The biosensor featuring CuO/Au@MWCNTs nanocomposite as an electrode material when 0.1 mole of CuO was synthesized showed the highest sensitivity of
, which is 4 times better than that of MWCNTs based biosensors. In addition, it shows a wider linear range from 0 to 10 mM and lower limit of detection (LOD) of 0.008 mM. These results demonstrate that CuO/Au@MWCNTs nanocomposite sensors are superior to other CuO based biosensors which are attributed that the nano-cluster shaped CuO is favorable for the electrochemical reaction with glucose molecules.
Synthesis of Propylene Carbonate over Metal containing Ionic Liquid Catalysts
Moon, Ye-Ji ; Ji, Dahye ; Kim, Dong-Woo ; Kim, Hyeon-Gook ; Cho, Deug-Hee ;
Applied Chemistry for Engineering, volume 27, issue 2, 2016, Pages 153~157
DOI : 10.14478/ace.2015.1124
In this study, three different metal-containing ionic liquid catalysts were prepared by metal insertion and characterized by various physicochemical analytic methods. The catalytic performance of the metal containing ionic liquids in the cycloaddition of
with propylene oxide (PO) to produce propylene carbonate (PC) was investigated under the solvent free condition. The order of approximate rate constants (
) for the metal containing ionic liquid catalysts was
. These results are in accord with the experimentally obtained activity order of the different metal containing ionic liquid catalysts.
Preparation of Spherical Energetic Composites by Crystallization/Agglomeration and their Thermal Decomposition Characteristics
Lee, Eun-Ae ; Shim, Hong-Min ; Kim, Jae-Kyeong ; Kim, Hyoun-Soo ; Koo, Kee-Kahb ;
Applied Chemistry for Engineering, volume 27, issue 2, 2016, Pages 158~164
DOI : 10.14478/ace.2015.1125
Spherical DADNE/AP (1,1-diamino-2,2-dinitroethylen/ammonium perchlorate) energetic composites were produced by drowning-out/agglomeration (D/A). The agglomeration of DADNE with AP particles was found to be affected by the amount of the bridging liquid, stirring velocity and residence time. The composites appeared to grow dramatically with the amount of bridging liquid which triggers agglomeration. As the stirring velocity and the residence time increased, the size of composites increased and then tended to decrease. Thermal gravimetric analysis showed that the addition of DADNE activates the low temperature decomposition (LTD) of AP. For the neat AP, the only about 30 wt% of AP was found to decompose at the LTD. On the other hand, it was found that 70 wt% of AP decomposed when DADNE was added by physical mixing and 90 wt% of AP decomposed when the DADNE/AP composites were prepared by the D/A method.
Effect of Ca Ion on the SCR Reaction over VO
Kim, Geo Jong ; Hong, Sung Chang ;
Applied Chemistry for Engineering, volume 27, issue 2, 2016, Pages 165~170
DOI : 10.14478/ace.2016.1006
In this study, we investigated the cause of the decrease in activities of
SCR catalyst used for the burner reactor at a scale of
using X-ray diffraction (XRD), brunauer-emmett-teller (BET), atomic emission spectroscopy inductively coupled plasma (AES ICP),
temperature programmed reduction (
temperature programmed desorption (
-TPD) analysis. Since the crystallization of the
and phase transition of
did not occur, it was concluded that the catalyst was not deactivated by the thermal effect. In addition, from the elemental analysis showing that a large quantity of calcium was detected but not sulfur, the deactivation process of the
SCR catalyst was mainly caused by Ca but not by
. The calcium was also found to decrease the catalytic activity by means of reducing
Techno-economic Evaluation of an Ethanol Production Process for Biomass Waste
Gwak, In-seop ; Hwang, Jong-Ha ; Lee, See Hoon ;
Applied Chemistry for Engineering, volume 27, issue 2, 2016, Pages 171~178
DOI : 10.14478/ace.2016.1007
Extensive efforts from all over the world have been made to solve energy problems, such as high oil prices, global warning due to the depletion of oil. Among them, biofuel has been drawing attention as a clean energy, which can replace fossil fuels. However, conventional biofuels were often converted from eatable biomass such as sugar cane, corn and soy which should be replaced with uneatable biomass. In this study, a techno-economical evaluation of the gasification of biomass waste with mixed alcohol synthesis process was performed. Considering available domestic biomass wastes, a 2000 ton/day conversion plant were assumed to produce 533000 L/day ethanol. Also, financial data from previous studies were evaluated and used and economical sensitivities with various operation conditions were established. Economic analysis were conducted by the payback period and internal rate of return (IRR) and net present value (NPV). Sensitivity analyses of raw material costs, initial investment, the major process cost, ethanol price changes and operating costs were all performed.
Influence of Carbon Fiber Direction on Mechanical Properties of Milled Carbon Fibers/Carbon Blacks/Natural Rubber Compounds
Ham, Eun-Kwang ; Choi, Kyeong-Eun ; Ko, Jae-Kyoung ; Seo, Min-Kang ;
Applied Chemistry for Engineering, volume 27, issue 2, 2016, Pages 179~184
DOI : 10.14478/ace.2016.1008
In this work, the influence of milled carbon fiber direction on mechanical properties of milled carbon fibers/carbon blacks/natural rubber compounds was investigated. The compounds were prepared by adding the 6 phr milled carbon fibers (MCFs) and 40 phr carbon blacks (CBs) into the natural rubber. The MCFs were aligned in a parallel and orthogonal direction in the compounds using two-roll-mill machine. Mechanical properties of compounds were studied by tensile characteristics and tearing strength. As a result, the compounds showed higher tensile strength, 100%~300% modulus, and tearing strength than those of using any other compounds due to the aligning MCFs in parallel. Mechanical properties of the compounds reinforced with non-aligned MCFs were inferior to those of others. Consequently, the parallel aligned MCFs in the compounds led to an increase of tensile properties and improvement of tearing strength, resulted from MCFs with the high elastic modulus.
A Study on Surface Modification of Nanorod Electrodes for Highly Sensitive Nano-biosensor
Lee, Seung Jun ;
Applied Chemistry for Engineering, volume 27, issue 2, 2016, Pages 185~189
DOI : 10.14478/ace.2016.1009
Among many kinds of bioaffinity sensors, the avidin-biotin system has been widely used in a variety of biological applications due to the specific and high affinity interaction of the system. In this work, gold nanorods with high surface area were explored as electrodes in order to amplify the signal response from the avidin-biotin interaction which can be further utilized for avidin-biotin biosensors. Electrochemical performance of electrodes modified with nanorods and functionalized with avidin in response to interactions with biotin at various concentrations using
couple as the redox probe were investigated using cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). A very low biotin concentration of less than 1 ng/mL could be detected using the electrodes modified with nanorods.
Synthesis of Tricyclopentadiene Using Ionic Liquid Supported Mesoporous Silica Catalysts
Kim, Su-Jung ; Jeon, Jong-Ki ; Han, Jeongsik ; Yim, Jin-Heong ;
Applied Chemistry for Engineering, volume 27, issue 2, 2016, Pages 190~194
DOI : 10.14478/ace.2016.1010
Tricyclopentadiene (TCPD) is one of the important precursors for making tetrahydrotricyclopentadiene, which is well known as a next-generation fuel with high energy density. In this study, TCPD was obtained by polymerization reaction of dicyclopentadiene (DCPD) using an ionic liquid (IL) supported mesoporous silica catalysts. ILs were supported to two kinds of mesoporous silica catalysts with different pore sizes such as MCM-41 and SBA-15. Four different ILs were supported to mesoporous silicas using anionic precursors such as CuCl or
and cationic precursors such as triethylamine hydrochloride or 1-butyl-3-methylimidazolium chloride. We proved that IL supported mesoporous silicas showed better catalytic performance than those of using non-supported prestine IL in the aspect of TCPD yield and DCPD conversion. Among four kinds of IL supported mesoporous silica catalysts, CuCl-based IL supported MCM-41 system showed the highest TCPD yield.
Process Development of 4,4'-Bis(2-benzoxazolyl)stilbene from Recyclable Source MFB
Ryu, Young ; Kim, Jong Cheon ; Ham, Mi Jeong ; Kim, Seok Chan ;
Applied Chemistry for Engineering, volume 27, issue 2, 2016, Pages 195~198
DOI : 10.14478/ace.2016.1012
A total four-step synthetic process of high quality optical brightening agent 4,4'-bis(2-benzoxazolyl)stilbene (BBS) from methyl 4-formylbenzoate (MFB) was developed with 73% total yield. MFB is one of the main by-products in dimethyl terephthalate (DMT) production process. Our process involves the formation of 4,4'-stilbenedicarboxylate (2) obtained from the reaction of an aldehyde in MFB with ethyl 4-((diethoxyphosphoryl)methyl)benzoate (1) and the subsequent transformation to 4,4'-stilbenedicarbonyl chloride (3). In order to prepare benzoxazole ring in BBS, various solvents and catalysts were studied. The best solvent and catalyst were found to be 1,2,4-trichlorobenzene and boric acid, respectively suitable for mass production of BBS.
Adsorption Thermodynamics, Kinetics and Isosteric Heat of Adsorption of Rhodamin-B onto Granular Activated Carbon
Lee, Jong Jib ;
Applied Chemistry for Engineering, volume 27, issue 2, 2016, Pages 199~204
DOI : 10.14478/ace.2016.1015
The adsorption of Rhodamine-B dye using granular activated carbon from aqueous solution was investigated. Adsorption experiments were carried out as a function of the adsorbent dose, pH initial concentration, contact time and temperature. The equilibrium adsorption data showed a good fit to Langmuir isotherm model. Based on the estimated Langmuir separation factor (
= 0.0164~0.0314), our adsorption process could be employed as an effective treatment method. The kinetics of adsorption followed the pseudo first order model. Also, the negative values of Gibbs free energy (-4.51~-13.44 kJ/mol) and positive enthalpy (128.97 kJ/mol) indicated that the adsorption was spontaneous and endothermic process. The isosteric heat of adsorption increased with increase in the surface loading indicating lateral interactions between the adsorbed dye molecules.
Electrohydrodynamic Instability at Surface of Block Copolymer/Titania Nanorods Thin Film
Bae, Joonwon ;
Applied Chemistry for Engineering, volume 27, issue 2, 2016, Pages 205~209
DOI : 10.14478/ace.2016.1017
The influence of titania nanorods with an average diameter of 10 nm and an average length of 30 nm on the electrohydrodynamic instability of block copolymer (polystyrene-b-poly(2-vinylpyridine)) thin film was investigated in this article. The presence of titania nanorods increased the dielectric constant of the film, which resulted in a systematic reduction in the wavelength of the surface instability. Cross-sectional transmission electron microscopy analysis indicated that the migration/aggregation of titania nanorods did not occur as a result of the applied electric field. This work can provide a simple route to the pattern formation using electrohydrodynamic instability with an aid of nanoparticles.
Electrical and Resistance Heating Properties of Carbon Fiber Heating Element for Car Seat
Choi, Kyeong-Eun ; Park, Chan-Hee ; Seo, Min-Kang ;
Applied Chemistry for Engineering, volume 27, issue 2, 2016, Pages 210~216
DOI : 10.14478/ace.2016.1018
In this paper, the electrical and resistance heating properties of carbon fiber heating elements with different electroless Ni-P plating times for car seat were studied. The specific resistance and specific heat of the carbon fibers were determined using 4-point probe method and differential scanning calorimetry (DSC), respectively. The surface morphology and temperature of carbon fibers were measured by scanning electron microscope (SEM) and thermo-graphic camera, respectively. From experimental results, the nickel layer thickness and surface temperature of carbon fibers increased with increasing the plating time. However, the specific heat and specific resistance decreased with respect to the increased plating time. In conclusion, the electroless Ni-P plating could improve the resistance heating and electrical properties of carbon fiber heating elements for car seat.
Phytoestrogen Extraction for Relaxation of Female Menopause Symptoms from Natural Products
Lee, Seung Bum ; Park, So Yeon ; Jeon, Gil Song ; Hong, In Kwon ;
Applied Chemistry for Engineering, volume 27, issue 2, 2016, Pages 217~220
DOI : 10.14478/ace.2016.1023
Phytoestrogens are one of quasi-estrogens which are not generated within the endocrine system, but consumed by intaking phytoestrogenic plants. Phytoestrogens, also called as "dietary estrogens", are various botanic chemical compound groups naturally occurring nonsteroidal plant compounds of spontaneous generation. Due to their structural similarities to estrogone, they may provide desirable health benefits for reducing the menopausal symptoms. In this paper, various phytoestrogens were extracted from sophora root, pomegranate and kudzu by ultrasonic extraction process. In this study, the amount of extracted phytoestrogens at various ultrasonic power strengths and extraction times were compared, which could be used as basic data in the study of biology and chemistry related to natural products.
Modification of Water-borne Polyurethane Using Benzophenone Crosslinker
Kim, HyeokJin ; Kim, Jin Chul ; Chang, SangMok ; Seo, BongKuk ;
Applied Chemistry for Engineering, volume 27, issue 2, 2016, Pages 221~226
DOI : 10.14478/ace.2016.1013
Production of eco-friendly and biologically harmless materials is strongly required in all industries. In particular, reducing volatile organic compounds in coating processes is extremely important to secure worker's safety. During recent two decades, extensive research works on water-borne polyurethane dispersion (PUD) have been continuously developed as an alternative to solvent-borne polyurethane. However, PUD was shown inferior mechanical properties to the organic solvent-borne polyurethane due to a limit to the molecular weight increase, which resulted in the limit of applications. To overcome this drawback, several approaches have been examined such as polymer blends and thermal/radiation induced crosslinking. Among these methods, the radiation curing system was suitable for industrialization because of the high crosslinking density and fast curing speed. In this study, we overcame the drawback for PUD via introducing benzophenone radiation curable units to PUD. We synthesized PUD films which possessed good dispersion in water for 30 days, increased Tg and Td more than
after UV curing film as well as improved young's modulus more than double.