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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 21, Issue 6 - Dec 2010
Volume 21, Issue 5 - Oct 2010
Volume 21, Issue 4 - Aug 2010
Volume 21, Issue 3 - Jun 2010
Volume 21, Issue 2 - 00 2010
Volume 21, Issue 1 - 00 2010
Selecting the target year
Combinatorial Synthesis of Organic Luminescent Materials
Kim, Chul-Bae ; Jo, Hyun-Jong ; Park, Kwang-Yong ;
Applied Chemistry for Engineering, volume 21, issue 4, 2010, Pages 357~365
Combinatorial synthesis, which has been adopted as an efficient method for deriving a leading compound in pharmaceutical chemistry, is recently being applied in various fields along with the rapid development of analysis and examination technology. It is especially attracting much attention as an efficient strategy to secure various potent compounds rapidly in the areas of developing new materials where the relationship between the chemical structure and the property is not revealed. Several reports and reviews have already been published for the combinatorial chemistry and combinatorial synthesis. This report briefly introduces trends in the combinatorial development of new materials and discusses the cases of developing organic luminescent materials.
Antimicrobial Activity and Mechanism of Various Nanoparticles
Kim, Jee-Yeon ; Park, Hee-Jin ; Yoon, Je-Yong ;
Applied Chemistry for Engineering, volume 21, issue 4, 2010, Pages 366~371
Accompanying the rapid advance of nanotechnology, various nano-particles have shown promise as strong antimicrobial agents against a broad spectrum of microorganisms. These nanoparticles also have potential applications in medical devices, water treatments systems, environmental sensors and so on. However, with increasing concerns about the impact of engineered nanoparticles, many researchers are recently reporting the cytotoxicity of nanoparticles. In this review paper, we summarized the antimicrobial activities and mechanisms of various kinds of engineered nanoparticles to imprale understanding about these characteristics of nanoparticles.
Patent Analysis of SDA Technology for Heavy Oil Upgrading
Kim, Yong-Heon ; Lee, Won-Su ; Kim, Jae-Ho ; Jeon, Sang-Goo ; Na, Jeong-Geol ; Nho, Nam-Sun ; Lee, Ki-Bong ;
Applied Chemistry for Engineering, volume 21, issue 4, 2010, Pages 372~376
Non-conventional energy is considered as important future energy source, as conventional energy has limitation for its capacity. The demand on value added process in heavy oil/oil sand bitumen is increasing in particular. Solvent Deasphalting (SDA) process for Deasphalted Oil (DAO) is used as heavy oil upgrading process in existing refinery process. SDA process for heavy oil upgrading has been already commercialized by leading countries. SDA R&D projects have been carried out actively by those countries. In this study, patent analysis for SDA technology development was carried out. From 1970's, when SDA patents were applied, the patents in Korea, USA, Japan, Canada and Europe were searched and distributed to extraction, recovery, solvent and etc. 334 patents were selected relating to heavy oil upgrading SDA process. The application status of SDA process patents showed a tendency to increase slightly. The number of patent applied was USA patent 131 (39%), Canada patent 83 (25%), Japan patent 35 (11%) and Korea patent 6 (2%). It will be necessary for efficient use of energy resource to support SDA R&D by government.
Phase Behaviors of the GAP/PTMG Polyurethanes Chain Extended with 3-Azidopropane-1,2-Diol
Kim, Hyoung-Sug ; You, Jong-Sung ; Kweon, Jung-Ohk ; Kim, Jung-Su ; Lee, Tong-Sun ; Noh, Si-Tae ; Jang, Young-Ok ; Kim, Dong-Kuk ; Kwon, Sun-Kil ;
Applied Chemistry for Engineering, volume 21, issue 4, 2010, Pages 377~384
We perform a comparative study to investigate the properties of the new energetic chain extender (AzPD). A series of poly(glycidyl azide)/poly(tetramethylene oxide)-based energetic segmented polyurethane (GAP/PTMG ESPU) with different chain extender, which is 3-azidopropane-1,2-diol (AzPD), 1,4-butane diol (1,4-BD), or 1,5 pentane diol (1,5-PD), was synthesized by solution polymerization in dimethyl formamide (DMF) and their phase behaviors were investigated. The ESPUs were characterized with Fourier transform infrared-attenuated total reflection spectroscopy (ATR FT-IR), differential scanning calorimetry (DSC), and dynamic mechanical analysis (DMA). The results of the ATR FT-IR analysis of the urethane carbonyl group region showed that the 'free' C=O fraction was higher in GAP/PTMG AzESPU (0.5) than GAP/PTMG BDESPU (0.44) and GAP/PTMG PDESPU (0.41) for 7 days samples after preparation and that it was similar in the range of 0.26~0.29 for three 60 days ESPU samples. DMA curves of the GAP/PTMG AzESPU for 7 days samples showed amorphous polymers, but GAP/PTMG BDESPU and GAP/PTMG PDESPU showed viscoelastic behaviors with rubbery plateau and the flow region. However, DMA curves of the GAP/PTMG AzESPU for 60 days samples showed viscoelastic behaviors with rubbery plateau and the flow region like GAP/PTMG PDESPU, but GAP/PTMG BDESPU did not show the flow region. From phase behaviors with ATR FT-IR, DSC and DMA analysis, GAP/PTMG AzESPU showed good phase-mixing between components. However, it represented viscoelastic behavior of TPE similar to GAP/PTMG PDESPM according to phase equilibrium progress with aging time.
Biodiesel Production from Vegetable Oils by Transesterification Using Ultrasonic Irradiation
Chung, Kyong-Hwan ; Park, Byung-Geon ;
Applied Chemistry for Engineering, volume 21, issue 4, 2010, Pages 385~390
Transesterifications of vegetable oils (soybean oil, grapeseed oil, corn oil, canola oil) by ultrasonic energy were examined on various catalysts for biodiesel production. Reaction activities of the transesterifications were evaluated to the ultrasonic energy and thermal energy. The physicochemical properties and product distribution were also investigated to the biodiesels produced from the oils in the reaction using ultrasonic energy. The yields of fatty acid methyl ester (FAME) on the alkali catalysts were higher than those on the acid catalysts. The highest FAME yield was obtained as 83% on potassium hydroxide catalyst in the transesterification. The effective reaction conditions by ultrasonic energy were 1 wt% catalyst loading and 6:1 molar ratio of methanol to vegetable oils. The reaction rate of the transesterification by ultrasonic energy was faster than that by thermal energy. The acid values of the biodiesel products were improved above 30% compared to those of the feedstocks.
The Effect of CO in the Flue Gas on
Kim, Sung-Su ; Hong, Sung-Chang ;
Applied Chemistry for Engineering, volume 21, issue 4, 2010, Pages 391~395
This study presents the effect of CO in flue gas on the
SCR by Pt/
catalyst. Coexisting CO which has characteristics of competitive adsorption with
as a reductant on the active sites showed the decrease of catalytic activity. Competitive adsorption with NO, CO and
also caused the reduction of activity and
, CO slip simultaneously. With increasing the inlet CO concentration, such phenomenon became more pronounced. Adding
on the catalyst to avoid the inhibition by coexisting CO,
added catalyst exhibited the durability against CO which fed 100 ppm under.
Adsorption Behaviors of Activated Carbons Modified by Chelating Groups
Jang, Dong-Il ; Park, Soo-Jin ;
Applied Chemistry for Engineering, volume 21, issue 4, 2010, Pages 396~400
In this work, the adsorption behaviors of activated carbons (ACs) containing chelating functional groups were studied in
removal. The ACs were modified by pyrolysis of peroxide and glycidyl methacrylate graft polymerization in order to induce chelating functional groups, such as diethylenetriamine groups on the AC surfaces. The surface functional groups of the ACs were characterized by scanning electron microscope (SEM) and X-ray photoelectron spectroscopy (XPS). The textural properties of the ACs were analyzed by
/77 K isotherms. Adsorption behaviors of the ACs were observed in the amounts of
adsorption. From the results, we found that the chelating functional groups on the AC surfaces led to enhance selectivity and chemisorption on
adsorption in spite of decreasing the physical adsorption properties.
Ion-Beam Induced Changes in the Characteristics of Gd Doped Ceria
Kim, Tae-Hyung ; Ryu, Boo-Hyung ; Lee, In-Ja ;
Applied Chemistry for Engineering, volume 21, issue 4, 2010, Pages 401~404
The ion-beam induced changes in the characteristics of gadolinium doped ceria (GDC) pellets have been studied by UV-visible spectroscopy (UV-vis), SEM, and XRD. Implanted ions were protons or Xe ions with the energy of 120 keV or 5 MeV. Densely sintered pristine GDC pellets have cubic fluorite structure and are brown in color. As the ion irradiation proceeded, its color gradually turned into light black and finally into dark black. XRD patterns of GDC pellets were closely related with ion energy and the penetration depth of X-ray. It showed that upon the ion irradiation (120 keV) the lattice parameter of the cubic fluorite phase just beneath the surface is increased.
DSSC Efficiency Characteristics by Annealing Temperature and Thickness of Electrodes
Hwang, Ki-Seob ; Ha, Ki-Ryong ;
Applied Chemistry for Engineering, volume 21, issue 4, 2010, Pages 405~410
The photovoltaic performance of DSSCs fabricated with different electrode thickness and different annealing temperature with the P25
and the Dyesol
was measured. Thickness change of
electrodes was measured using cross-sectional FE-SEM before and after annealing. Photovoltaic efficiencies of DSSCs were also measured by changing annealing temperature of platinum (Pt) paste on the counter electrode. Photovoltaic performances of DSSCs made with one layer of P25 (
) and one layer of Dyesol
) annealed at
for 30 min. showed highest efficiencies of 3.8% and 5.8%, respectively.
Thick Film Resistors with Low Tolerance Using Photosensitive Polymer Resistor Paste
Kim, Dong-Kook ; Park, Seong-Dae ; Lee, Kyu-Bok ; Kyoung, Jin-Bum ;
Applied Chemistry for Engineering, volume 21, issue 4, 2010, Pages 411~416
In this research, we intended to improve the tolerance of thick film resistor using photosensitive polymer resistor paste which was fabricated with alkali-solution developable photosensitive resin and conductive carbon black. At first, we investigated the effect of the selection of carbon black and photosensitive resin on the resistance range and tolerance level of polymer thick film resistor (PTFR). And then, a difference in resistance tolerance was evaluated according to the coating methods of photosensitive resistor paste on test board. In case that the photosensitive resistor paste was coated on whole surface of test board using screen printing, large positional tolerance was obtained because the formation of the thick film with uniform thickness was difficult. On the other hand, when the paste was coated with roller, the resistive thick film with uniform thickness was formed on the whole board area and the result of resistance evaluation showed low tolerance in
range. The tolerance of PTFR could be improved by combination of the precise patterning using photo-process and the coating process for the resistive thick film with uniform thickness.
Study on Characteristics and Preparation of Binderless ZSM-5 Granules for Adsorption of Xylene Isomers
Yun, Hyo-Sang ; Hong, Ji-Sook ; Suh, Jeong-Kwon ; Shin, Chae-Ho ;
Applied Chemistry for Engineering, volume 21, issue 4, 2010, Pages 417~423
In this study, an effective method to prepare granular binderless ZSM-5 which is as efficient p-xylene separatory adsorbent was explored. Colloidal silica sol 30 wt% solution as an inorganic binder and microcrystalline cellulose as an organic additive were added to ZSM-5 powder (
= 50). Adsorbent with enough strength (0.721 kgf), high crystallinity (94.6%) and high BET specific surface area (
/g) was obtained by calcination, binderless treatment,
ion exchange, and activation after spherical granulation process. A batch type adsorption experiment was proceeded with solutions comprising 3 xylene isomers by 1 : 1 : 1 weight ratio to evaluate adsorption characteristics of prepared absorbent. As a result, the obtained binderless ZSM-5 granule showed a higher selective adsorption performance for para-xylene than that of commercial adsorbent.
Synthesis of 6-Alkyl-3-Chromonealdehyde(2,2-dialkyl)hydrazone Derivatives for Green Light Emitting Materials
Chung, Pyung-Jin ; Chang, Hong-Joon ;
Applied Chemistry for Engineering, volume 21, issue 4, 2010, Pages 424~429
6-Alkyl-3-chromonealdehyde (2,2-dialkyl)hydrazone derivatives were synthesized by dehydration condensation. They are green-emitting materials for organic light emitting device (OLED) composed of electron acceptor of 6-alkyl-3-chromonealdehydes and electron donor of 2,2-dialkylhydrazones in a conjugated structure. The structural properties of reaction products were analyzed by FT-IR and
-NMR spectroscopy. The thermal stabilities and reactivities were measured by melting points and yields. The UV-visibles and PL properties were also determined by excitation spectra and emission spectra, respectively.
Preparation of Sheet with CNT for EMI Shielding and Its EMI Shielding Property
Chae, Seong-Jeong ; Cho, Bum-Rae ; Hong, Byung-Pyo ; Lee, Byoung-Soo ; Byun, Hong-Sik ;
Applied Chemistry for Engineering, volume 21, issue 4, 2010, Pages 430~434
The sheet for electromagenetic interference (EMI) shielding was prepared with slurry made by the mixture of binder, methyl ethyl ketone, cyclohexanone and metal powder. We tried to enhance the shielding efficiency by adding carbon nanotube (CNT), which has known as highly conducting material. Surface and component analyses were carried out with SEM and EDS, respectively. The electric characteristics and EMI shielding efficiencies were measured with 4-point probe measurement and EMI efficiency measurement equipment. The sheet with 2% CNT addition showed the lowest electrical resistance,
. It also showed the highest EMI shielding efficiency of 63 dB.
Synthesis of Pt-
Electrode by Electrodeposition Method for Direct Methanol Fuel Cell
Shin, Ju-Kyung ; Jung, So-Mi ; Baeck, Sung-Hyeon ; Tak, Yong-Suk ;
Applied Chemistry for Engineering, volume 21, issue 4, 2010, Pages 435~439
electrodes were fabricated on ITO-coated glass by electrodeposition method using 20 mM hydrogen hexachloroplatinate (
) and 10 mM Mo-peroxo electrolyte. Deposition order was varied, and catalytic activities of synthesized electrodes were compared with that of pure Pt electrode. Scanning Electron Microscopy (SEM) was utilized to examine surface morphology. The crystallinity of synthesized films was analyzed by X-ray Diffraction (XRD), and the oxidation state of both the platinum and molybdenum were determined by X-ray Photoelectron Spectroscopy (XPS) analyses. The catalytic activity and stability for methanol oxidation were measured using cyclic voltammetry (CV) and chronoamperometry (CA) in a mixture of 0.5 M
and 0.5 M
electrodeposited on the surface of Pt showed much higher catalytic acitivity and stability than pure Pt electrode due to the good contact between Pt and
Prepared by Preparation Method with Ammonium Nitrate
Son, Hyang-Ho ; Lee, Won-Gyu ;
Applied Chemistry for Engineering, volume 21, issue 4, 2010, Pages 440~444
powders were prepared from the calcination of stannic acids precipitated from the aqueous solution of
with ammonium nitrate as a precipitator at
. For the comparison of properties, the stannic acids were prepared from the homogeneous precipitation method using urea as a precipitator at the same temperature. The stannic acid from ammonium nitrate at a thermal gravity analysis showed the weight loss until
and the percentage of total weight loss was 16.5%. The crystallization of stannic acid into
finished in the calcination at
for 2 h. The crystallite size of
increased with the increase of calcination temperature and initial concentration of
solution. In case of the same calcination condition,
prepared from homogeneous precipitation using urea had a relatively smaller crystallite size rather than
prepared from ammonium nitrate.
Preparation and Characterization of the Photocatalysts Transition Metal-Doped Ti-SCM
Jung, Won-Chae ; Hong, Ji-Sook ; Suh, Jeong-Kwon ; Suh, Dong-Hack ;
Applied Chemistry for Engineering, volume 21, issue 4, 2010, Pages 445~451
shows considerably efficient photoreaction activity under the ultraviolet range but it has disadvantage that there is no activity in the visible light range. In this study, it was tried to find a solution for the problem of this kind of photocatalyst by utilizing transition metal, which can show electronic transition with
in the visible light area. Photocatalyst was prepared, which can have photocatalytic activity in the wide wavelength range, not only ultraviolet region but also visible light area and prevent the combination of electron and hole hindering the photoreaction. For this purpose, by using the ion exchange method,
precursor and transition metal precursor were dipped into H typed strong acid ion-exchange resin. And two kind photocatalysts (Ti-M-SCM) in which transition metal and titanium dioxide coexist through the carbonization/activation process was prepared. Moreover, photolytic reaction under the wavelength 254 nm and 365 nm was performed for humic acid (HA) in the continuous reactor in order to estimate the efficiency of produced Ti-M-SCM.
A Comparative Study on the Effect of Commercialized Immobilized Lipases on the Selective Synthesis of 1,3-Diglyceride
Chung, Dae-Won ; Cho, Mi-Hye ;
Applied Chemistry for Engineering, volume 21, issue 4, 2010, Pages 452~456
It is known that 1,3-diglyceride (1,3-DG) hardly accumulates inside human body because the metabolism of 1,3-DG is entirely different from that of general fats such as triglycerides (TG). This research focuses on the selective synthesis of 1,3-DG by the esterification reaction using an immobilized lipase. For a reaction between glycerin and oleic acid (OA) with a mole ratio of 1 : 2 under vacuum, changes in the compositions of monoglyceride (MG), TG and DG and the contents of 1,3-isomers in DG were investigated, as a function of reaction temperature and the amount of lipase. The reactivities determined by the rate of the consumption of OA became higher with the increase in temperature and the amount of lipase. When the results were compared with those obtained in the earlier study where Novozym was applied as an immobilized lipase, the reactivity was higher for Novozym, on the other hand, selectivity to 1,3-DG was much higher for Lipozyme. Especially, it is remarkable that 1,3-DG content in total DG reached to 98% in the reaction carried out at
Effects of Concrete Superplastizers on the Cement Wettability and the Strength Properties of Cocreate Mortar
Kim, Young-Ho ;
Applied Chemistry for Engineering, volume 21, issue 4, 2010, Pages 457~462
In this research, the effects of the concrete superplastizers on the wettability of cement particle and concrete strength were studied. The wettability of the cement particles strongly depended on the type of the superplastizer. When the superplastizer had a higher wettability with the cement particles, it revealed a good fluidity of the concrete mortar and a higher concrete strength. Non-ionic superplastizers (polycarboxylic type) had a relatively good performance on the mortar fluidity and concrete strength properties compared to anionic superplastizers (lignosulfate, sulfonated naphthalene formaldehyde, sulfonated melamin formaldehyde). It was observed that the blending of the polycarboxylic and the lignosulfate type concrete superplastizers resulted in synergistic effects on the concrete mortar fluidity and concrete strength properties.
The Effects of the Coplymerization Conditions in Synthesis of Polycarboxylic Type Superplasticizer on Interfacial Properties and on Cement Mortar Fluidity
Kim, Young-Ho ;
Applied Chemistry for Engineering, volume 21, issue 4, 2010, Pages 463~468
The polycarboxylic (PC) type concrete superplasticizer was synthesized. The effects of ethylene oxide group number and its molecular weight on the properties of the polycarboxylic type concrete superplasticizer and the concrete motar properties were studied. To investigated of the interfacial properties of the premixed-concrete with the superplasticizer, the type and the amount of polyethylene glycol, meta acrylate added, and type of the initialization agent were studied. Also the interfacial properties of the superplasticizer aqueous phase, the wettability on the cement particle, the fluidity of the cement mortar, and the strength properties of the concrete were measured. For a high fluidity of the cement mortar and a high strength of concrete, a low value of the surface tension and contact angle were required for PC. To have a good performance for PC, the reaction condition of 1.3 mol ratio of MA against to MPEG was suitable with KSP initiator.
Combustion Properties of the Quercus variabilis and Zelkova serrata Dried at Room Temperature (II)
Chung, Yeong-Jin ; Jin, Eui ;
Applied Chemistry for Engineering, volume 21, issue 4, 2010, Pages 469~474
Wood has an essential drawback such as high combustion ability. The purpose of this paper is to examine the combustion properties of the quercus variabilis and zelkova serrata dried at room temperature. The cone calorimeter (ISO 5660-1) was used to determine the heat release rate (HRR) and fire smoke index, as well as CO/
production and smoke obscuration. The total heat release (THR),
of the quercus variabilis under an external
was high in comparison with THR
for the zelkova serrata. Furthermore, the quercus variabilis has high total smoke production (TSP),
compared with TSP
of zelkova serrata. Thease results depend on the bulk density of tested wood species. In addition, the CO/
production ratio of zelkova serrata and quercus variabilis was measured as 0.053, 0.043, respectively. Also, zelkova serrata showed an increase of fire-resistance attributed to char formation compared with that of quercus variabilis.
Fabrication of Fluorinated Polymeric Membranes and Their Noble Gas Separation Properties
Kim, Gi-Bum ; Yoon, Kuk-Ro ;
Applied Chemistry for Engineering, volume 21, issue 4, 2010, Pages 475~478
Fluorinated polymeric membranes were prepared by direct surface modification of PDMS with fluorine gas (
in nitrogen). The formed fluorinated polymeric membranes were characterized by FT-IR spectroscopy, GC (Gas chromatography), atomic force microscopy, and scanning electron microscopy. Direct fluorination resulted in the change of permeability and selectivity of various gases (pure gases such as
, mixture of He, Ne, Kr, Xe) through PDMS membranes. Fluorination resulted in the maximum 50% increase of selectivity through PDMS membrane.