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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Applied Chemistry for Engineering
Journal Basic Information
Journal DOI :
The Korean Society of Industrial and Engineering Chemistry
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Volume & Issues
Volume 25, Issue 6 - Dec 2014
Volume 25, Issue 5 - Oct 2014
Volume 25, Issue 4 - Aug 2014
Volume 25, Issue 3 - Jun 2014
Volume 25, Issue 2 - Apr 2014
Volume 25, Issue 1 - Feb 2014
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Nanocatalyst Materials Prepared by Arc Plasma Deposition
Kim, Sang Hoon ;
Applied Chemistry for Engineering, volume 25, issue 4, 2014, Pages 341~345
DOI : 10.14478/ace.2014.1073
Catalyst nanoparticles are prepared by arc plasma deposition (APD). First, overview of the APD technique is reviewed and second, some applications of the technique for nanocatalyst preparation are reviewed. Nanoparticles prepared by APD are typically 1~5 nm in size and their catalytic activity is generally better than that of conventional wet-chemically prepared nanocatalysts.
Carbon Electrodes in Capacitive Deionization Process
Chung, Sangho ; Lee, Jae Kwang ; Ocon, Joey D. ; Son, Young-Il ; Lee, Jaeyoung ;
Applied Chemistry for Engineering, volume 25, issue 4, 2014, Pages 346~351
DOI : 10.14478/ace.2014.1080
With the world population's continuous growth and urban industrialization, capacitive deionization (CDI) has been proposed as a next-generation water treatment technology to augment the supply of water. As a future water treatment method, CDI attracts significant attention because it offers small energy consumption and low environmental impact in comparison to conventional methods. Carbon electrodes, which have large surface area and high conductivity, are mainly used as electrode materials of choice for the removal of ions in water. A variety of carbon materials have been investigated, including their adsorption-desorption behavior in accordance to the specific surface area and pore size distribution. In this review, we analyzed and highlighted these carbon materials and looked at the impact of pore size distribution to the overall CDI efficiency. Finally, we propose an optimal condition in the interplay between micropores and mesopores in order to provide the best electrosorption property for these carbon electrodes.
Preparation and Properties of Silicone-Modified Epoxy Coating Materials
Kim, Jin Kyung ; Bak, Seung Woo ; Hwang, Hee Nam ; Kang, Doo Whan ; Kang, Ho Jong ;
Applied Chemistry for Engineering, volume 25, issue 4, 2014, Pages 352~356
DOI : 10.14478/ace.2014.1019
PDMS modified epoxy resin with epoxy group (EMPDMS) was prepared from the reaction of
-aminopropylpolydimethylsiloxane and diglycidyl ether of bisphenol-A (DGEBA) based epoxy resin, and PDMS modified epoxy hybrid compound (EMPDMSH) was prepared by introducing alkylesteraminopropyl alkoxy silane to EMPDMS. Their structures were characterized using FT-IR,
-NMR. Coating materials were prepared by mixing EMPDMSH base and solvent. Physical properties of the coating materials coated on epoxy/glass fiber composite film were measured according to the content of PDMS in EMPDMSH. Contact angle of coating film was increased 30 to 71 degree. Adhesive property of coating film was 5B degree better then epoxy or acrylate coating materials, and surface roughness was decreased as increasing in EMPDMSH.
Pigmentation of Diketopyrrolopyrroles Compound through Solvent Thermal-treatment and Its Property
Kim, Jae Hwan ; Yang, Seok Won ; Kim, Dae-Sung ; Wu, Guan Zhu ; Lee, Gun-Dae ; Park, Seong Soo ;
Applied Chemistry for Engineering, volume 25, issue 4, 2014, Pages 357~362
DOI : 10.14478/ace.2014.1032
To prepare diketopyrrolopyrrole (DPP) red 254 pigment with high shield and bright color, DPP red 254 crude previously synthesized was treated at various thermal-treat temperature, addition derivative and ball-milling. The properties of samples were measured by the means of FT-IR, UV-Vis spectroscopy, TEM, PSA, BET surface area analyzer, viscometer and spectrophotometer. It was found that solvent thermal-treatment of the sample prepared after ball-milling as nano-scale was very effective method in pigmentation process.
Effects of Dietary Fiber from Mozuku (Cladosiphon novae-caledoniae kylin) Residue on Antioxidant Activity and Anticancer in HT-29 Human Colon Cancer Cells according to Extraction Condition
Jeong, Haeng Soon ; Lee, Jae-Hwa ;
Applied Chemistry for Engineering, volume 25, issue 4, 2014, Pages 363~367
DOI : 10.14478/ace.2014.1039
In this study, the dietary fiber contents of Mozuku (Cladosiphon novae-caledoniae kylin) residue and the extraction condition (HCl,
) of the dietary fiber was investigated. We examined that the contents of the total polyphenols and flavonoids in the dietary fiber from Mozuku residue, and the potent anti-cancer effect was also tested through the growth inhibition in human colon cancer cells (HT-29) in vitro. It was effective to extract soluble dietary fiber with 1.5%
and 0.05 N HCl in Mozuku residue. The extraction time and temperature affected the yields of soluble dietary fiber. The contents of the total polyphenols and flavonoids in the dietary fiber from Mozuku residue were the highest in 1% NaOH extract (Total polyphenols
mg gallic acid/g dry basis, total flavonoids
mg naringin/g extract dry basis). In DPPH radical scavenging activity, 1% NaOH extract showed the most potent antioxidant activity. In the result of viability in human colon cancer cells, growth inhibition was observed in D.W., 0.05 N HCl, and 0.5%
extracts in a dose-dependent manner. These results demonstrated that soluble dietary fiber from Mozuku residue significant antioxidant activity and anticancer in human colon cancer.
Coencapsulation of L-Ascorbic Acid and α-Tocopherol in Ethosomes and Their Properties
Lim, Yoon Mi ; Jun, Yoon Kyung ; Park, Seyeon ; Jin, Byung Suk ;
Applied Chemistry for Engineering, volume 25, issue 4, 2014, Pages 368~373
DOI : 10.14478/ace.2014.1041
Coencapsulation of hydrophilic L-ascorbic acid and hydrophobic
-tocopherol in ethosome vesicles was attempted and their properties were investigated in this study. The size of vesicles decreased with increasing concentration of L-ascorbic acid solution encapsulated in ethosome. The vesicle size and encapsulation efficiency of ethosomes increased slightly when
-tocopherol was added into the HPC-forming liquid crystalline membrane of ethosome. However, the vesicle size increased highly and the encapsulation efficiency decreased abruptly at mixing ratios above 25 wt% due to the formation of an imperfect liquid crystalline structure within a vesicle membrane. It was observed that antioxidant activity was maintained for 5 weeks at
when L-ascorbic acid and
-tocopherol were coencapsulated in ethosome. The L-ascorbic acid in ethosome was stable compared to that in aqueous solution under UV radiation.
Verification of Occurring White Fine Particles of MgO on the Surface of Archival Materials During Deacidification Process
Han, Sien-Ho ; Lee, Sang Kyu ; Shin, Hyun Chang ; Kim, Hojin ;
Applied Chemistry for Engineering, volume 25, issue 4, 2014, Pages 374~379
DOI : 10.14478/ace.2014.1043
After completing deacidification process and evacuating rest of solvent, white fine particles of MgO are found on the surface of archival materials, such as books and documents. When MgO particles remain on the surface of archives, instead of being well dispersed and absorbed into cellulose fiber of archives, such white fine particles are found. These particles have raised concerns for employees' deacidification environment and their health; however, the concerns have not been addressed. To find the cause of white fine particles on the surface of archives after deacidification process and to propose the its solution, an acidic paper and wood free paper were applied with deacidifying chemicals. We analyzed the domestic and abroad deacidifying chemicals' physical properties and conducted deacidifcation processes to find effects of different contents and sizes of MgO on white fine particles. When the size of MgO particle was 847 nm, there was significantly less amount of white fine particles on the surface of archival materials. This means that the size of MgO particle plays a significant role in producing white fine particles on the surface of archives.
Characteristics of Concrete Polymer Composite Using Atomizing Reduction Steel Slag as an Aggregate (II) (Use of Polystyrene as a Shrinkage Reducing Agent)
Hwang, Eui-Hwan ; Kim, Jin-Man ;
Applied Chemistry for Engineering, volume 25, issue 4, 2014, Pages 380~385
DOI : 10.14478/ace.2014.1044
Spherical atomizing reduction steel slag was prepared by atomizing technology using reduction steel slag (ladle furnace slag, LFS) generated from steel industry. In order to develop the mass-recycling technology of atomizing reduction steel slag, polymer concrete composite was prepared using spherical atomizing reduction steel slag instead of fine aggregate (river sand) and coarse aggregate (crushed aggregate), depending on the grain size. Different polymer concrete specimens were prepared with the various proportions of polymer binder and replacement ratios of atomizing reduction steel slag in order to investigate the characteristics of polymer concrete composite. Results showed that compressive strengths of polymer concrete specimens decreased with the increase of replacement ratios of atomizing reduction steel slag, but flexural strengths of the specimens showed a maximum strength at the 50% of replacement ratios of atomizing reduction steel slag. It was concluded that addition ratio of polymer binder, which affect greatly on the prime cost of production of polymer concrete, could be reduced by maximum 18.2 vol% because the workability of the polymer concrete was remarkably improved by using the atomizing reduction steel slag. However, further study is required because the mechanical strength of the specimen using atomizing reduction steel slag was greatly reduced in hot water resistance test.
Sterilization of Scoria Powder by Corona Discharge Plasma
Jo, Jin Oh ; Lee, Ho Won ; Mok, Young Sun ;
Applied Chemistry for Engineering, volume 25, issue 4, 2014, Pages 386~391
DOI : 10.14478/ace.2014.1046
Atmospheric-pressure nonthermal corona discharge plasma was applied to the sterilization of biologically contaminated scoria powder. Escherichia coli (E. coli) culture solution was uniformly sprayed throughout the scoria powder for artificial inoculation, which was well mixed to ensure uniformity of the batch. The effect of the key parameters such as discharge power, treatment time, type of gas and electrode distance on the sterilization efficiency was examined and discussed. The experimental results revealed that the plasma treatment was very effective for the sterilization of scoria powder; 5-min treatment at 15 W could sterilize more than 99.9% of E. coli inoculated into the scoria powder. Increasing the discharge power, treatment time or applied voltage led to an improvement in the sterilization efficiency. The effect of type of gas on the sterilization efficiency was in order of oxygen, synthetic air (20% oxygen) and nitrogen from high to low. The inactivation of E. coli under the influence of corona discharge plasma can be explained by cell membrane erosion or etching resulting from UV and reactive oxidizing species (oxygen radical, OH radical, ozone, etc.), and the destruction of E. coli cell membrane by the physical action of numerous corona streamers.
Efficient Stereoselective Synthesis of (2S,3S,4S)-3,4-Dihydroxyglutamic Acid
Jeon, Jongho ; Shin, Nara ; Lee, Jong Hyup ; Kim, Young Gyu ;
Applied Chemistry for Engineering, volume 25, issue 4, 2014, Pages 392~395
DOI : 10.14478/ace.2014.1045
(2S,3S,4S)-3,4-Dihydroxyglutamic acid (DHGA), a biologically active
-amino acid, was efficiently synthesized from a readily available D-serine derivative in 30% overall yield over 11 steps. The key stereoselective
-catalyzed dihydroxylation reaction controlled by an N-diphenylmethylene group on the amino group of
-unsaturated (Z)-ester successfully introduced the diol moiety of the intermediate 5a in 86% with more than 10 : 1 diastereomeric ration. Then it was in turn successfully converted to the desired target compound, (2S,3S,4S)-3,4-DHGA, via simple oxidation and hydrolysis in a highly stereoselective manner and a higher yield than the previous syntheses. This result strongly supports that our synthetic methodology of stereoselective
-catalyzed dihydroxylation should be useful in stereoselctive synthesis of various bioactive compounds with an amino diol moiety.
Immobilization of Metallocene inside the Aminosilane-Functionalized Nanopore of SBA-15 and MCM-41 and Its Ethylene Polymerization
Celedonio, Jhulimar ; Lee, Jeong Suk ; Ko, Young Soo ;
Applied Chemistry for Engineering, volume 25, issue 4, 2014, Pages 396~400
DOI : 10.14478/ace.2014.1055
The pore surface of mesoporous materials, SBA-15 and MCM-41 were functionalized with organosilanes, 3-aminopropyltrimethoxysilane (1NS) and N-[(3-trimethoxysilyl)propyl]ethylenediamine (2NS) via grafting method.
and methylaluminoxane (MAO) were impregnated on the surface-functionalized mesoporous materials for the application to ethylene polymerization. In the case of SBA-15/2NS/
supported Zr and Al contents decreased as grafted 2NS content increased. However, in the case of MCM-41/2NS/
supported Al content decreased, but Zr content increased as grafted 2NS content increased. The polymerization activity of SBA-15/2NS/
increased as the amount of grafted 2NS increased. Increase in the amount of grafted 2NS should caused decrease in pore volume and diameter. Consequently, it decreased the amount of supported metallocene and MAO in general. However, the smaller pore-sized MCM-41 could have lower supported MAO content due to its large molecular size in case that MCM-41 was surface-functionalized with 2NS. Therefore, the supported metallocene content could increase and its polymerization activity was higher than that of SBA-15.
Numerical Simulation of Three Dimensional Fluid Flow Phenomena in Cylindrical Submerged Flat Membrane Bioreactor for Aeration Rate
Kim, Dae Chun ; Chung, Kun Yong ;
Applied Chemistry for Engineering, volume 25, issue 4, 2014, Pages 401~408
DOI : 10.14478/ace.2014.1054
In membrane bio-reactor (MBR), the aeration control is one of the important independent variables to decrease fouling and to save energy with shear stress change on the membrane surface. The paper was carried out for numerical simulation of 3-dimensional fluid flow phenomena of the cylindrical bioreactor with submerged flat membranes equipped in the center and supplied the air from the bottom by using the COMSOL program. The viscosity and temperature of solution were assumed to be constant, and the specific air demand based on permeate volume (
) defined as scouring air per permeate rates was used as a variable. The calculated CFD velocities were compared with those of the velocity meter measurement and video image analysis, respectively. The results were good agreement each other within 11% error. For fluid flow in the reactor the liquid velocity increased rapidly between the air diffuser and membrane module, but the velocity decreased during flowing of the membrane module. Also, the velocity increased as it was near from the reactor wall to the central axis. The calculated shear stress on the membrane surface showed the highest value at the center part of the module bottom side and increased as aeration rate increased. Especially, the wall shear stress increased dramatically as the aeration rate increased from 0.15 to 0.25 L/min.
Development of Optimal Binder for Recycling Cold Asphalt Mixture
Hong, In Kwon ; Jeon, Gil Song ; Yang, Chang Bae ; Lee, Seung Bum ;
Applied Chemistry for Engineering, volume 25, issue 4, 2014, Pages 409~413
DOI : 10.14478/ace.2014.1056
This study was carried out to design the optimum mixing ratio of aggregate, cyclic aggregate, and binder (moisture, emulsified asphalt, and emulsion type additives) and produce recycling cold asphalt paving mixture satisfying site work standard. The cyclic aggregate satisfying KS F 2572 was collected from waste asphalt by adequate processing. As the moisture content increased, the shearing strength was decreased. The maximum marshall stability was shown at the 3.0 wt% moisture content. So the optimum moisture content was 3.0 wt%. The marshall stability and flow value with the amount of emulsified asphalt was satisfied in the range of 0.5~2.5 wt%, and the porosity was satisfied in the range of 0.7~2.5 wt%. So the optimum amount of emulsified asphalt was 1.6 wt%. The optimum amount of emulsion type additive was 0.1 wt% in the light of marshall stability and degree of saturation of recycling cold asphalt mixture.
Study on Leaching Behavior for Recovery of Ga Metal from LED Scraps
Park, Kyung-Soo ; Swain, Basudev ; Kang, Lee Seung ; Lee, Chan Gi ; Uhm, Sunghyun ; Hong, Hyun Seon ; Shim, Jong-Gil ; Park, Jeung-Jin ;
Applied Chemistry for Engineering, volume 25, issue 4, 2014, Pages 414~417
DOI : 10.14478/ace.2014.1059
LED scraps consisting of highly crystalline GaN and their leaching behavior are comprehensively investigated for hydro-metallurgical recovery of rare metals. Highly stable GaN renders the leaching of the LED scraps extremely difficult in ordinary acidic and basic media. More favorable state can be obtained by way of high temperature solid-gas reaction of GaN-
powder mixture, ball-milled thoroughly at room temperature and subsequently oxidized under ambient air environment at
in a horizontal tube furnace, where GaN was effectively oxidized into gallium oxides. Stoichiometry analysis reveals that GaN is completely transformed into gallium oxides with Ga contents of ~73 wt%. Accordingly, the oxidized powder can be suitably leached to ~96% efficiency in a boiling 4 M HCl solution, experimentally confirming the feasibility of Ga recycling system development.
Effects of NaCl/H
Flame Retardant Treatment on Lyocell Fiber for Thermal Stability and Anti-oxidation Properties
Kim, Eun Ae ; Bai, Byong Chol ; Jeon, Young-Pyo ; Lee, Chul Wee ; Lee, Young-Seak ; In, Se Jin ; Im, Ji Sun ;
Applied Chemistry for Engineering, volume 25, issue 4, 2014, Pages 418~424
DOI : 10.14478/ace.2014.1064
The improved thermal stability and anti-oxidation properties of Lyocell fiber were studied based on flame retardant treatment by using NaCl/
solution. The optimized conditions of flame retardant treatment were studied on various maxing ratio of NaCl and
and the mechanism was proposed through experimental results of thermal stability anti-oxidation. The IPDT (integral procedural decomposition temperature), LOI (limited oxygen index) and
(activation energy) increased 23, 30 and 24% respectively via flame retardant treatment. It is noted that thermal stability and anti-oxidation improved based on char and carbon layer formation by dehydrogenation and dissociation of C-C bond resulting the hindrance of oxygen and heat energy into polymer resin. The optimized conditions for efficient flame retardant property of Lyocell fiber were provided using NaCl/
solution and the mechanism was also studied based on experimental results such as IDT (initial decomposition temperature), IPDT, LOI and
Synthesis of Pd-Ag on Charcoal Catalyst for Aerobic Benzyl Alcohol Oxidation Using [Hmim][PF
Choo, Yunjun ; Yoo, Kye Sang ;
Applied Chemistry for Engineering, volume 25, issue 4, 2014, Pages 425~429
DOI : 10.14478/ace.2014.1063
Pd on charcoal particles were prepared by wet impregnation to develop commercial catalyst for aerobic benzyl alcohol oxidation. Especially, one of room temperature ionic liquids, [Hmim][
], was used as an effective solvent in the synthesis to improve the metal dispersion of the catalysts. Among the Pd/Charcoal with various Pd concentrations, 7.5 wt% catalyst showed the higher catalytic activity and stability. Moreover, Ag was used as a promoter with various ratios in catalyst preparation. Under identical reaction conditions, the catalyst with 9 : 1 of Pd and Ag weight ratios was most active due to higher metal dispersion.
Equilibrium, Kinetic and Thermodynamic Parameter Studies on Adsorption of Allura Red from Aqueous Solution by Granular Activated Carbon
Lee, Jong-Jib ;
Applied Chemistry for Engineering, volume 25, issue 4, 2014, Pages 430~436
DOI : 10.14478/ace.2014.1065
Allura Red (AR) is a water-soluble harmful tar-based food colorant (FD & C Red 40). Batch adsorption studies were performed for the removal of AR using bituminous coal based granular activated carbon as adsorbent by varying the operation parameters such as adsorbent dosage, initial concentration, contact time and temperature. Experimental equilibrium adsorption data were analyzed by Langmuir, Freundlich and Temkin isotherms. The equilibrium process was described well by Freundlich isotherm. From determined separation factor (
), adsorption of AR by granular activated carbon could be employed as effective treatment method. Temkin parameter, B was determined to 1.62~3.288 J/mol indicating a physical adsorption process. By estimation of adsorption rate experimental data, the value of intraparticle diffusion rate constant (
) increased with the increasing adsorption temperature. The adsorption process were found to confirm to the pseudo second order model with good correlation. Thermodynamic parameters like change of free energy, enthalpy, and entropy were also calculated to predict the nature adsorption in the temperature range of 298~318 K. The negative Gibbs free energy change (
= -2.16~-6.55 kJ/mol) and the positive enthalpy change (
= + 23.29 kJ/mol) indicated the spontaneous and endothermic nature of the adsorption process, respectively.