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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
Editor in Chief :
Volume & Issues
Volume 23, Issue 6 - Dec 2012
Volume 23, Issue 5 - Oct 2012
Volume 23, Issue 4 - Aug 2012
Volume 23, Issue 3 - Jun 2012
Volume 23, Issue 2 - Apr 2012
Volume 23, Issue 1 - Feb 2012
Selecting the target year
Fabrication of Environmental-friendly Materials Using Atomic Layer Deposition
Kim, Young Dok ;
Applied Chemistry for Engineering, volume 23, issue 1, 2012, Pages 1~7
In this article, I will introduce recent developments of environmental-friendly materials fabricated using atomic layer deposition (ALD). Advantages of ALD include fine control of the thin film thickness and formation of a homogeneous thin fim on complex-structured three-dimensional substrates. Such advantages of ALD can be exploited for fabricating environmental-friendly materials. Porous membranes such as anodic aluminum oxide (AAO) can be used as a substrate for
coating with a thickness of about 10 nm, and the
-coated AAO can be used as filter of volatile organic compound such as toluene. The unique structural property of AAO in combination with a high adsorption capacity of amorphous
can be exploited in this case.
can be also deposited on nanodiamonds and Ni powder, which can be used as photocatalyst for degradation of toluene, and
reforming of methane catalyst, respectively. One can produce structures, in which the substrates are only partially covered by
domains, and these structures turns out to be catalytically more active than bare substrates, or complete core-shell structures. We show that the ALD can be widely used not only in the semiconductor industry, but also environmental science.
Effects of the Addition of Metallic Salts and Polyhydric Alcohols on the Formation of Zinc Complex-compound Particle
In, Se-Jin ;
Applied Chemistry for Engineering, volume 23, issue 1, 2012, Pages 8~13
The experiments have been performed to obtain zinc complex compound with smaller particle size, which is used as a charge control agent in manufacturing toner. Metallic salts and polyhydric alcohols have been studied to investigate their effects on the formation of different sizes of zinc complex-compound particle. Reactants such as zinc chloride and 3,5-di-tert-butyl salicylic acid have been used to form the complex compound. Polyethylene glycol (PEG-300), glycerin and ethylene glycol have been added into the zinc chloride solution beforehand to lower the reaction rate in the formation of zinc complex-compound. Zirconium (IV) oxychloride octahydrate has been mixed in the zinc chloride solution beforehand to restrain crystals from growing. When PEG-300 and zirconium (IV) oxychloride octahydrate are used to lower the reaction rate and to restrain the particle size from growing, the average particle size of zinc complex compound decreases from 5.28 to 1.84
, which is 34.9% of 5.28
Synthesis of Submicron Silver Particle Using Room Temperature Ionic Liquids
Yoo, Kye Sang ;
Applied Chemistry for Engineering, volume 23, issue 1, 2012, Pages 14~17
Submicron silver particles were synthesized by chemical reduction with various room temperature ionic liquids. The size and distribution of silver particles were significantly affected by the anion type of ionic liquids and this is mainly attributed to the different abilities of the anions to coordinate with the silver particle, leading to various coagulation of silver particles. Among ionic liquids, 1-butyl-3-methylimidazolium hexafluorophosphate was the most effective to synthesize submicron silver particles.
Determination of Processing Parameters Affecting the Conversion and Thermal Stability of Photocurable Acrylate-based Binder
Kim, Byungchul ; Seo, Dong Hak ; Chae, Heon-Seung ; Shin, Seunghan ;
Applied Chemistry for Engineering, volume 23, issue 1, 2012, Pages 18~22
Photocurable binder for a transparent glass fiber composite was prepared with alicyclic methacrylate and fluorene-based diacrylate. ANOVA (analysis of variance) analysis was used to know main factors affecting the conversion of photocurable binder. It showed radiation intensity and photoinitiator (PI) concentration were main factors. The conversion of photocurable binder was simply increased with radiation intensity. Its increment however was abated with increasing PI concentration. We found that average conversion of the binder measured by FTIR-ATR was 87% when it was exposed to
of UV dose with 5 wt% of PI. Oxime ester type PI was very effective to get a high degree of conversion, but it caused a yellowing problem. Owing to post-baking process, UV cured film showed an improved thermal stability by increase of conversion and removal of volatile organic compounds. TG% at
of film cured with 5 wt% of PI (TPO+MBF) and
of UV radiation increased from 95.4 to 99.0% by post-baking at
for 5 min.
Development of a Methanol Absorption System for the Removal of
in Syngas from Biomass Gasifier
Eom, Won Hyun ; Kim, Jae Ho ; Lee, See Hoon ;
Applied Chemistry for Engineering, volume 23, issue 1, 2012, Pages 23~27
To make synthetic liquid fuel from biomass such as wood pellet, energy crop and so on, a biomass to liquid (BTL) process by using a biomass gasifier with Fisher-Tropsch (FT) reaction was developed. However
, COS and
in syngas from biomass gasifiers resulted in a decrease of the conversion efficiency and the deactivation of the catalyst. To remove acid gases in syngas, a lab-scale methanol absorption tower was developed and the removal characteristics of acid gases were investigated. The methanol absorption tower efficiently removed
and COS with a removal of
, so it could be useful process for the BTL process.
Biogas Resource from Foodwaste Leachate Using UASB(Upflow Anaerobic Sludge Blanket)
Min, Boo-Ki ; Lee, Chang-Hyun ; Kim, Jae-Yong ;
Applied Chemistry for Engineering, volume 23, issue 1, 2012, Pages 28~34
In this study, we operated a UASB (upflow anaerobic sludge blanket) reactor by using foodwaste leachate as a raw material with the method of Mesophilic Digestion (
) and Thermophilic Digestion (
). During 20 days of operating time with the Mesophilic Digestion, the recirculation ratio of effluent was stepwisely changed in every five days. Thermophilic Digestion was carried out at the same condition for Mesophilic Digestion. Results showed that the organic removal efficiency of Mesophilic Digestion was over 90% and the yield of methane production was from 66 up to 70%. The organic removal efficiency of Thermophilic Digestion was over 80% and the yield of methane production was between 62 to 68%. Also, when UASB reactor was operating to over the 3Q effluent recirculation, the experiment could be carried out economically and stably.
Development of On-line Quantitative Analysis for Bioethanol Using Infrared Spectroscopy
Kim, Hyeonguk ; Ryu, Jun-Hyung ; Liu, J. Jay ;
Applied Chemistry for Engineering, volume 23, issue 1, 2012, Pages 35~41
This paper proposes a new methodology for the real-time on-line quality monitoring of biofuel processes through the integration of infrared spectroscopy and chemometrics. A method of Partial Least Squares (PLS) in Chemometrics is employed for quantitative analysis of key components in bioethanol products. After a number of preprocessing methods and variable importance in projection (VIP) are used, Savitzky-Golay method showed the best performance in terms of spectrum correction, noise reduction, and model maintenance. The proposed method allows us to economically forecast the concentration of multiple impurities encountered with the production of bioethanol. The proposed system is also accurate enough (
> 0.99) to replace the laboratory analysis.
Removal of Indoor Formaldehyde Using Mesoporous Carbon Activated with KOH
Yu, Mi Jin ; Park, Sung Hoon ; Jeon, Jong-Ki ; Park, Young-Kwon ;
Applied Chemistry for Engineering, volume 23, issue 1, 2012, Pages 42~46
In this study, a mesoporous carbon (CMK-3) activated using KOH was applied to the adsorption of formaldehyde, a representative indoor air pollutant. Activation process was carried out by putting KOH-treated CMK-3 in a reactor maintained at
atmosphere. The activated sample was characterized using BET, XRD, XPS and FT-IR analysis. The formaldehyde adsorption performance of the mesoporous carbon was improved, which is attributed to the formation of oxygen and nitrogen functional groups on the mesoporous carbon surface by the activation process.
Sensing Characteristics of Carbon-nanofibers Based on Effects of Porosity and Amine Functional Group
Kim, Jong Gu ; Kang, Seok Chang ; Shin, Eunjeong ; Kim, Da Young ; Lee, Jin Hee ; Lee, Young-Seak ;
Applied Chemistry for Engineering, volume 23, issue 1, 2012, Pages 47~52
Porous carbon nanofibers were prepared as a gas sensor electrode to study the
sensing property based on effects of porosity and introduced amine functional groups. Electrospun fibers were obtained by using electrospinning method with polyacrylonitrile precursor and they were treated by the thermal treatment and chemical activation. Amine functional groups were introduced by the liquid state treatment using diethylenetriamine. The specific surface area increased up to
by the chemical activation. The Introduced amine functional group was identified using FT-IR spectroscopy.
gas sensing property was improved as four folds via introduced amine functional groups on the activated carbon nanofiber. In conclusion, the gas sensing property was improved based on the developed porosity by the chemical activation and the chemical attraction of
gas by introduced functional groups.
Studies on the Synthesis and Characteristic of Silica-PMMA Nano Hybrid Material
Son, Dae Hee ; Kim, Dae-Sung ; Lee, Seung-Ho ; Kim, Song Hyuk ; Lee, Gun-Dae ; Park, Seong Soo ;
Applied Chemistry for Engineering, volume 23, issue 1, 2012, Pages 53~58
In order to improve the surface hardness of transparent plastic films, an organic-inorganic hybrid coating solution was sunthesized by the sol-gel method. Coating solutions that were prepared colloidal silica (CS), poly methyl methacrylate (PMMA), vinyltrimethoxysilane (VTMS), and [3-(methacryloyloxy)]propyltrimethoxy silane (MAPTMS) was varied with synthesizing parameters such as kinds of organic silane and weight ratio of CS to PMMA. Such coating solution was bar coated on the PET film, cured, and investigated on the chemical and physical properties of coating film. The organic-inorganic hybrid coating solutions have better properties at the pencil hardness and adhesion of coating film than those of an organic material such as PMMA.
Preparation of Monodispersed Polystyrene Latex Spheres (PLS) as Artificial Dusts
Kim, Ok Hee ; Ryu, Dong Wan ; Sung, Dong Chan ; Moon, Hee ;
Applied Chemistry for Engineering, volume 23, issue 1, 2012, Pages 59~64
Polystyrene latex spheres (PLS) were prepared as artificial dusts by the emulsion polymerization with potassium persulfate (KPS) and sodium dodecyl sulfonate (SDS) as an initiator and a stabilizer, respectively. The reaction temperature and the concentration of the initiator and stabilizer were chosen as variables to control the PLS particle size. As temperature increased, the particle size decreased considerably. Furthermore, the PLS particle size and their size distributions can be controlled minutely by adjusting the concentrations of KPS and SDS. It is confirmed that the PLS prepared in this work is monodispersed with the coefficient of variance less than 7% and are in the range of 0.1~0.5
, which are good for using as artificial dusts.
Effect of the Position of Azobenzene Moiety on the Light-Driven Anisotropic Actuating Behavior of Polyvinylalcohol Polymer Blend Films
Kim, Hyong-Jun ;
Applied Chemistry for Engineering, volume 23, issue 1, 2012, Pages 65~70
Structural changing materials which can induce the physical deformation of materials are interesting research topics with various potential applications. Particularly, light among many driving mechanisms is a non-contact energy source, hence the light-responsive system can be used where non-destructive, local irradiation, and remote control is needed. Here, a mainchain azobenzene polymer is synthesized and its physical and optical properties are observed and compared to that of a polymer having a light-responsive azobenzene moiety on its side chain. Further dispersion onto polyvinylalcohol hydrogel is made and its dual stability and actuation are observed upon UV-visible light irradiation. Extended azobenzene polymer blend films show an anisotropic light-actuation with non-polarized UV light at room temperature. This physical shape change is quite reversible and occurs at lower temperature than that of any other reported systems including liquid crystalline elastomers. It is successfully demonstrated that the simple physical azobenzene/polymer blending has a very good actuation compared to that of LCEs which need an elaborate chemical design and it can be further used in the areas requiring a dimensional shape change.
Study on Anti-biofouling Properties of the Surfaces Treated with Perfluoropolyether (PFPE)
Park, Sooin ; Kwon, Sunil ; Lee, Yeongmin ; Koh, Won-Gun ; Ha, Jong Wook ; Lee, Sang-Yup ;
Applied Chemistry for Engineering, volume 23, issue 1, 2012, Pages 71~76
Biofouling by marine organisms such as algae and barnacles causes lots of significant problems in marine systems such as a rise of the maintenance-repair cost for the ship and the marine structures. In this work, a fluoropolymer, perfluoropolyether (PFPE), was applied as an anti-biofouling coating material that prevents the adhesion of marine organisms and facilitates the removal of them. Water contact angles of various surfaces were tested to examine the hydrophobicity of the PFPE-modified surface. The PFPE-modified surface showed the water contact angle of
which is a remarkable rise from
of amine-treated surface. When the substrate was treated with PFPE, the adhesion on the of the barnacle and other marine organisms were repressed around 15% by the enhanced hydrophobicity. In addition, the removal the of the adhered marine organisms were better comparing to that of the surface prepared by PDMS. Surfaces of the substrate treated by PFPE were characterized through physical and chemical methods to analyze the biofouling results. Degree of biomolecular adhesion to the substrate was quantified by the measurement the fluorescence intensity of marine organisms dyed with green fluorescence. PFPE is expected to be applicable not only to anti-biofouling systems but also to medical devices where the prevention of protein adhesion is required.
A Foamed Body through the Complexation with the Sepiolite and Expanded Pearlite
Lee, Chul-Tae ; Jang, Moonho ; Park, Tae-Moon ;
Applied Chemistry for Engineering, volume 23, issue 1, 2012, Pages 77~85
Production process of the flexible ceramic foamed body through the complexation with the fiberous sepiolite and expanded pearlite was researched. The processing of fibrillation of the inorganic mineral fiber sepiolite is the most important whole processing for manufacturing of the ceramic foamed body consisting of the expanded perlite and sepiolite. The fibrous sepiolite and expanded pearlite are blended and becomes the slurry phase. And this slurry phase is converted to a massive foamed body through the low temperature heat treatment process less than
. The heat-treatment process of the slurry phase composite has to be designed to include the evaporation step of the moisture remaining among the slurry composition, foaming step by the decomposition of the foaming agent, and resolution removal step of the organic material which was added in the composite remained after the foaming step. The heat treatment process should be considered as significant factors in design of total process. As to the condition of heat treatment process and foaming agent, there was the a correlation. An organic type foaming agent like DSS (dioctyl sodium sulfosuccinte) was effective in foaming of the slurry compound consisting of the expanded perlite and sepiolite fiber.
Electrochemical Generation of Chlorine Dioxide Using Polymer Ion Exchange Resin
Rho, Seung Baik ; Kim, Sang Seob ;
Applied Chemistry for Engineering, volume 23, issue 1, 2012, Pages 86~92
A characteristic study of chlorine dioxide generation by the electrolysis system was performed after chlorite (
) is adsorbed from sodium chlorite by a polymer ion exchange resin. A strongly basic anion exchange resin was used and a Ti plate coated with Ru and Ir was used as an electrode. Various parameters such as reaction stirring velocity, reaction temperature, chlorine dioxide product concentration, ion exchange resin content and product maker type for the adsorption quantity in the chlorite adsorption of ion exchange resin were investigated and found the ion exchange resin with the maximum adsorption quantity. A generation trend of chlorine dioxide was observed by the electrolysis system and optimum conditions on the desired value were found using response surface design of DOE (Design of Experiments). The strongly basic anion exchange resin with the maximum adsorption quantity was SAR-20 (TRILITE Gel type II) and the adsorption quantity was around 110 mg/IER (g). Observed generation optimum conditions of chlorine dioxide were constant-current (electrode area base;
) and flow rate of
gas (4.7 L/min) at the desired value of sterilization (900~1000 ppm, 1 h).
Antioxidative Activity and Componential Analysis of Chamaecyparis obtusa Leaf Extract
Lee, Dong Sook ; Lim, Myoung Sun ; Kwan, Soon Sik ; Kim, Sun Young ; Park, Soo Nam ;
Applied Chemistry for Engineering, volume 23, issue 1, 2012, Pages 93~99
In this study, the evaluation of antioxidative activity and componential analysis of C. obtusa leaf extracts was carried out. Reactive oxygen species (ROS) scavenging activities (
) of C. obtusa leaf extracts on ROS generated in
system were investigated using the luminol-dependent chemiluminescence assay. The ethyl acetate fraction (
) and aglycone fraction of C. obtusa leaf extracts (0.20
) showed about 7 times more prominent ROS scavenging activity than L-ascorbic acid (1.50
). The cellular protective effects of fractions obtained from C. obtusa leaf extracts on the rose-bengal sensitized photohemolysis of human erythrocytes were investigated. The ethyl acetate fraction and aglycone fraction of C. obtusa leaf extracts showed the cellular protective effects in a concentration dependent manner (5~25
). The inhibitory effect (
) of ethyl acetate fraction and aglycone fraction on tyrosinase exhibited 74.43 and 53.80
, repectively. The aglycone fraction showed four times higher tyrosinase inhibitory effect than arbutin (226.88
), known as a whitening agent. The aglycone fraction of C. obtusa leaf extracts showed three bands in TLC chromatogram and three peaks in HPLC chromatogram (360 nm). Three compounds were identified as taxifolin, quercetin and kaempferol. These results indicate that the fractions of C. obtusa leaf extracts can function as antioxidants in biological systems, particularly skin exposed to UV radiation by scavenging
and other ROS, and protect cellular membranes against reactive oxygen species. The fractions of C. obtusa leaf extracts can be applicable to new functional cosmetics for antioxidan and whitening effects.
Characterization of Erwinia tasmaniensis Isolated from Nuruk Producing Alginate Lyase
Kim, Hyun Ji ; Lee, Sung-Mok ; Kim, Sung-Koo ; Lee, Jae-Hwa ;
Applied Chemistry for Engineering, volume 23, issue 1, 2012, Pages 100~104
Oligosaccharides production showed various biological activities in vivo like functional foods and industrial materials utilized available within many practical applications which have obtained from the degradation of alginate. Alginate is rich in the main component of seaweeds especially the brown algae. We investigated what degrading alginate from seaweeds to make alginate oligosaccharides can utilize in various fields using enzyme secreting Erwinia tasmaniensis. In this study, we observed an optimal culture condition of E. tasmaniensis, and characteristics of alginate lyase secreting E. tasmaniensis. These bacteria, E. tasmaniensis, were isolated from Nuruk. In this case, a suitable growth factor for E. tasmaniensis was culture it for 36 h in broth media on concentration of 1.0% (w/v) alginate. The enzyme showed the highest level of alginate lyase activity when cultured on broth media containing 1.0% (w/v) sodium alginate for 72 h. Optimal condition of pH, temperature and duration time for alginate lyase activity were found to be pH 6.0,
and 60 min, respectively.
Low Temperature Selective Catalytic Reduction of NO with
Ko, Jeong Huy ; Park, Sung Hoon ; Jeon, Jong-Ki ; Sohn, Jung Min ; Lee, See-Hoon ; Park, Young-Kwon ;
Applied Chemistry for Engineering, volume 23, issue 1, 2012, Pages 105~111
Manganese (Mn) catalysts were generated using
supports synthesized by the supercritical hydrothermal method and two different Mn precursors, aimed at an application for a low-temperature selective catalytic reduction process. Manganese acetate (MA) and manganese nitrate (MA) were used as Mn precursors. Effects of the kind and the concentration of the Mn precursor used for catalyst generation on the NOx removal efficiency were investigated. The characteristics of the generated catalysts were analyzed using
adsorption-desorption, thermo-gravimetric analysis, X-ray diffraction, and X-ray photoelectron spectroscopy. De-NOx experiments were carried out to measure NOx removal efficiencies of the catalysts. NOx removal efficiencies of the catalysts generated using MA were superior to those of the catalysts generated using MN at every temperature tested. Analyses of the catalyst characteristics indicated that the higher NOx removal efficiencies of the MA-derived catalysts stemmed from the higher oxygen mobility and the stronger interaction with support material of
produced from MA than those of
produced from MN.
Measurement of an Isoelectric Point and Softness of a Zwitterionic Surfactant
Lim, Jongchoo ; Kim, Jisung ; Mo, Dahee ; Lee, Jinsun ;
Applied Chemistry for Engineering, volume 23, issue 1, 2012, Pages 112~118
In this study, physical properties of synthesized DE7-OSA82-AO and DEP52-OSA82-AOQ82 zwitterionic surfactants were measured such as critical micelle concentration, surface tension, interfacial tension, contact angle and viscosity. Phase behavior study was also performed. The dual function characteristics of a zwitterionic surfactant were investigated by determining an isoelectric point, which was attained using zeta potential measurements and QCM (quartz crystal microbalance) experiments. The isoelectric point of DE7-OSA82-AO surfactant determined by the zeta potential measurement and QCM experiment was about 7.2 and 7.4, respectively. On the other hand, the isoelectric point of DEP52-OSA82-AOQ82 surfactant determined by the zeta potential measurement and QCM experiment was about 10.9 and 11.0, respectively. The frictional property measured using an automated mildness tester showed that DE7-OSA82-AO surfactant can provide a good softening effect at an acidic or neutral condition. On the other hand, DEP52-OSA82-AOQ82 was found to provide a good softening effect to a fabric surface at a pH below its isoelectric point of 11.
The Effect of Oxygen in Low Temperature SCR over Mn/
Lee, Sang Moon ; Choi, Hyun Jin ; Hong, Sung Chang ;
Applied Chemistry for Engineering, volume 23, issue 1, 2012, Pages 119~123
This study presents the effect of oxygen on the
selective catalytic reduction (SCR) by Mn/
catalyst. The lattice oxygen of catalysts is participate in the low temperature SCR, and the gaseous oxygen directly takes part in the rexoidtion of reduced catalyst. These redox properties of oxygen an play important role in SCR activity and the available capability of lattice oxygen depends on the manganese oxidation state of the catalyst surface.
species has a higher redox property than that of
species on deposited
surface and these manganese oxide states strongly depend on the