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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 27, Issue 4 - Aug 2016
Volume 27, Issue 3 - Jun 2016
Volume 27, Issue 2 - Apr 2016
Volume 27, Issue 1 - Feb 2016
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Supported Metal Nanoparticles: Their Catalytic Applications to Selective Alcohol Oxidation
Hussain, Muhammad Asif ; Joseph, Nyanzi ; Kang, Onyu ; Cho, Young-Hun ; Um, Byung-Hun ; Kim, Jung Won ;
Applied Chemistry for Engineering, volume 27, issue 3, 2016, Pages 227~238
DOI : 10.14478/ace.2016.1047
This review article highlights different types of nano-sized catalysts for the selective alcohol oxidation to form aldehydes (or ketones) with supported or immobilized metal nanoparticles. Metal nanoparticle catalysts are obtained through dispersing metal nanoparticles over a solid support with a large surface area. The nanocatalysts have wide technological applications to industrial and academic fields such as organic synthesis, fuel cells, biodiesel production, oil cracking, energy conversion and storage, medicine, water treatment, solid rocket propellants, chemicals and dyes. One of main reactions for the nanocatalyst is an aerobic oxidation of alcohols to produce important intermediates for various applications. The oxidation of alcohols by supported nanocatalysts including gold, palladium, ruthenium, and vanadium is very economical, green and environmentally benign reaction leading to decrease byproducts and reduce the cost of reagents as opposed to stoichiometric reactions. In addition, the room temperature alcohol oxidation using nanocatalysts is introduced.
Application of Silica-supported Ionic Liquid Catalysts to Cycloaddition of CO
Kim, Dong-Woo ; Kim, Hyeon-Gook ; Cho, Deug-Hee ;
Applied Chemistry for Engineering, volume 27, issue 3, 2016, Pages 239~244
DOI : 10.14478/ace.2016.1031
The catalytic applicability of various ionic liquids immobilized on different silica-supports such as amorphous, SBA, MCM and commercial silica for the cycloaddition of
and epoxides is reviewed in this work. The effects of different structures of supported ionic liquids and silica supports in the synthesis cyclic carbonate by the cycloaddition of
have been remarked. The studies revealed that ionic liquids possessing functional groups or metals exhibited increased catalytic performance towards cyclic carbonate synthesis. Moreover, the reusability of SSIL catalyst and mechanism for the cycloaddition of
Trends of Environment-friendly Bioplastics
Lee, Jaechoon ; Pai, Chaulmin ;
Applied Chemistry for Engineering, volume 27, issue 3, 2016, Pages 245~251
DOI : 10.14478/ace.2016.1034
Trends of bioplastics, especially biomass-based bioplastics which is one of the most promising ways to solve the depletion of fossil fuels and global warming problems, were investigated. Emerged bioplastic polymers such as polylacticacid (PLA), polyglycolicacid (PGA) for cosmetic additive, polyhydroxyalkanoate (PHA) produced by bacterial fermentation, and cost effective starch-based polymer were discussed with their general studies. Also recent technologies of environment-friendly bioplastics for packaging and construction materials as well as disposable hygienic goods were briefly reviewed.
Recent Trends in Composite Materials for Aircrafts
Kim, Deuk Ju ; Oh, Dae Youn ; Jeong, Moon Ki ; Nam, Sang Yong ;
Applied Chemistry for Engineering, volume 27, issue 3, 2016, Pages 252~258
DOI : 10.14478/ace.2016.1043
The weight reduction and improved mechanical property are one of the prime factors to develop new materials for the aerospace industry. Composite materials have thus become the most attractive candidate for aircraft and other means of transportations due to their excellent property and light weight. In particular, fiber reinforced polymer (FRP) composite materials have been used as an alternative to metals in the aircraft. The composite materials have shown improved properties compared to those of metal and polymeric materials, which made the composites being used as the skin structure of the airplane. This review introduces different types of materials which have been developed from the FRP composite material and also one of the most advantageous ways to employ the composites in aircraft.
A Study on Processing and Physical Properties of Isoprene Rubber Involving Norbornene Dialkyl Ester
Jeong, Hye-in ; Jo, Nam-chol ; Woo, Je-Wan ;
Applied Chemistry for Engineering, volume 27, issue 3, 2016, Pages 259~264
DOI : 10.14478/ace.2016.1022
In this study, we applied six different norbornene dialkyl esters as a plasticizer to an isoprene rubber (IR) and evaluated replaceability of DEHP which is an endocrine disruptor. IR test sheets were prepared by blending IR, norbornene dialkyl ester, vulcanizing agent, etc. and processing properties of the IR were evaluated by measuring Toque, scorch time, cure time and mooney viscosity. Mechanical properties of IR test sheet including hardness, tensile strength, 100% modulus and elongation were also measured and the physical properties of norbornene dialkyl ester applied as a plasticizer were compared to those using DEHN. Both the maximum and minimum toque for the norbornene dialkyl ester as a plasticizer were similar to those of using DEHP. In addition, the scorch and cure time of the former were slightly longer than those of the latter. The mooney viscosity for the case of DEHN was slightly lower than that of the latter. DEHN was also superior to DEHP in terms of processing. The hardness and thermal properties of all IR test sheets were measured to be similar to each other. The linear alkyl chain of norbornene compounds also exhibited good tensile characteristics.
Studies on Adsorption and Desorption of Ammonia Using Covalent Organic Framework COF-10
Yang, Heena ; Kim, Iktae ; Ko, Youngdon ; Kim, Shindong ; Kim, Whajung ;
Applied Chemistry for Engineering, volume 27, issue 3, 2016, Pages 265~269
DOI : 10.14478/ace.2016.1025
Ammonia gas as a hydrogen source has received great attention since the importance of hydrogen gas as a clean energy source increased. However, ammonia is toxic and corrosive to metal such that the absorbent that can store and transport ammonia became an important issue. As an effort to solve this, a large pored covalent organic framework, COF-10 was proposed as an adsorbent for storage and safe transportation of ammonia. During the ammonia adsorption process, boron in COF-10 structure can act as a Lewis acid site and bind with ammonia. In this study, COF was synthesized and its structure was identified by BET, XRD and FT-IR. The adsorption characteristics of COF were investigated by TPD and adsorption isotherm. The COF-10 showed an excellent adsorption capacity for ammonia (9.79 mmol/g) which could be utilized as an ammonia adsorbent.
Effect of the Chemical Treatment and Fiber Length of Kenaf on Physical Properties of HDPE/Kenaf/Expandable Microcapsule
Ku, Sun Gyo ; Lee, Jong Won ; Kim, Youn Cheol ;
Applied Chemistry for Engineering, volume 27, issue 3, 2016, Pages 270~275
DOI : 10.14478/ace.2016.1026
High density polyethylene (HDPE)/kenaf fiber (KF) composites included two types of KF with different lengths were fabricated by using a twin screw extruder. A thermally expandable microcapsule (EMC) was used to form HDPE/KF. The KF lengths were 0.3 mm and 3 mm. The contents of KF and EMC were fixed at 20 wt% and 5 wt%, respectively. From FT-IR data of KF, which underwent chemical treatment, peaks around 1700 and
decreased. This might be caused by the reduction of lignin and hemicellulose due to the chemical treatment of KF. Based on the specific gravity, thermal stability and tensile property, physical properties of the composites with a 3 mm fiber were good. However, if the fiber is longer, poor appearance might be caused due to the thermal degradation during processing. Thus, the adequate length of KF should be chosen to maintain the appearance and physical properties for industrial applications of HDPE/KF/EMC composites. The tensile strength for 0.3 mm fiber treated with chemicals increased slightly.
Extraction of Flavonoid Components from Persimmon Leaf, Thistle and New Green
Hong, In Kwon ; Park, Bo Ra ; Jeon, Gil Song ; Lee, Seung Bum ;
Applied Chemistry for Engineering, volume 27, issue 3, 2016, Pages 276~279
DOI : 10.14478/ace.2016.1027
In this study, we extracted active components from thistle, persimmon leaf, and new green which are known to have a high content of antioxidants and also analyzed the 1,1-Diphenyl-2-picrylhydrazyl (DPPH) radical scavening activity and flavonoid content. Both ultrapure water and alcohol were used as extraction solvents and the ratio of both solvents, sample, amunts extraction time, and extraction temperature were varied. The optimal extraction condition of each natural compounds were 2.5~3.5 h of the extraction time and 50 g/L of the sample amount. The optimal ratio of ultrapure water and alcohol and extraction temperature were as follows; persimmon leaf (55~65 vol%,
), thistle (40~50 vol%,
) and new green (55~65 vol%,
). In addition, the antioxidant capacity and flavonoid content of the extract increased in the order of persimmon leaf, thistle, and new green.
Extraction of Active Ingredient from Angelica Using Microwave Energy
Lee, Seung Bum ; Kim, Hoon Gi ; Jeon, Gil Song ; Hong, In Kwon ;
Applied Chemistry for Engineering, volume 27, issue 3, 2016, Pages 280~284
DOI : 10.14478/ace.2016.1032
In this study, the extractable content of each parameters from angelica was confirmed using conventional solvent extraction and microwave extraction in order to extract the functional active ingredient. In addition, the functionality of active ingredients was evaluated by measuring the antioxidant activity and the flavonoids and total polyphenols of the active ingredient extracted from angelica, For the conventional solvent extraction at optimal conditions of the extraction time (2 h), ethanol/pure water volume ratio (60%), the extraction temperature (
), 20.6 wt% of the active ingredient were extracted. Also, when using microwave extraction at optimal conditions of the microwave irradiation time (6 min), microwave intensity (600 W) and ethanol/pure water volume ratio (60 vol%) 22.8 wt% of the active ingredient were extracted. The microwave method required shorter time to complete extraction compared to that of using the conventional solvent extraction method. The antioxidant activity of active ingredients extracted from angelica was 31.46% of DPPH radical scavening activity. The flavonoid content was 14.20 mg QE/mg dw, and total polyphenol content was 11.70 mg GAE/g when using the microwave extraction process.
Mechanical and Thermal Properties of Epoxy Composites Reinforced Fluorinated Illite and Carbon Nanotube
Lee, Kyeong Min ; Lee, Si-Eun ; Kim, Min Il ; Kim, Hyeong Gi ; Lee, Young-Seak ;
Applied Chemistry for Engineering, volume 27, issue 3, 2016, Pages 285~290
DOI : 10.14478/ace.2016.1033
To improve properties of epoxy composites, surfaces of the illite and carbon nanotube (CNT) were treated by fluorine gas. The fluorinated illite and CNT were then characterized by X-ray photoelectron microscopy (XPS) and the mechanical and thermal properties of their composites were evaluated. The tensile and impact strengths and thermal stability of the composites increased upto about 59%, 18% and 124%, respectively compared to those of the neat epoxy. Improvements of mechanical and thermal properties in the composites were attributed that the fluorination of illite and carbon nanotube helps to enhance the dispersion in epoxy resin and interfacial interaction between them.
Effect of Amine Oxide Zwitterionic Surfactant on Characteristics of Liposome
Mo, DaHee ; Lee, SuMin ; Lee, JuYeon ; Han, DongSung ; Lim, JongChoo ;
Applied Chemistry for Engineering, volume 27, issue 3, 2016, Pages 291~298
DOI : 10.14478/ace.2016.1035
In this study, zwitterionic surfactants were added to liposome systems at different pH conditions to understand the effect of surfactants on liposome characteristics. For this purpose, amine oxide surfactants having different hydrocarbon chain lengths were synthesized and the structure of the resulting product was elucidated by using
NMR, and FT-IR. In addition, the physical properties of newly synthesized surfactants such as critical micelle concentration (CMC), surface tension and isoelectric point were measured. The stability characteristics of liposome systems including average particle sizes and zeta potentials were measured by varying pH and hydrocarbon chain lengths of an amine oxide surfactant. Effects of the pH and hydrocarbon chain length of an amine oxide surfactant on fluidity of a liposome membrane were also examined by measuring the deformability and the binding degree between the surfactant and liposome.
Morphology and Mechanical Properties through Hydroxyapatite Powder Surface Composite
Kye, Sung Bong ; Park, Soo Nam ;
Applied Chemistry for Engineering, volume 27, issue 3, 2016, Pages 299~306
DOI : 10.14478/ace.2016.1036
In this study, new hydroxyapatite powder surface composites were investigated for protective effects against ultraviolet rays. Hydroxyapatite (HAp) is biocompatible and does not cause nebula phenomenon on skin. We investigated the surface modification of hydroxyapatite to improve UV block and skin usage. Dimethicone, lauroyl lysine, triethoxycaprylylsilane and silica were used as coating agents for the surface modification of HAp. To prepare the composite complex of the modified surface, the dimethicone, lauroyl lysine and triethoxycaprylylsilane were prepared by a dry process, and silica by a hydrothermal synthesis method. The HAp-silica was chosen as the best composite powder when measuring its sun protection levels. We investigated the characteristics of the surface of HAp-silica by SEM, particle size analyzer and energy dispersive spectrometry (EDS). Additionally, the stability in the formulation, UV block effect, and safety in BB creams were investigated. In conclusion, HAp-silica prepared by the modification of HAp complex surface improved the skin usage and UV block effect by enhancing the white cloudy phenomenon. These results indicate that HAp-silica may be used for UV block cosmetics.
Synthesis of PbMoO
Using a Facile Surfactant-assisted Hydrothermal Method and Their Photocatalytic Activity
Hong, Seong-Soo ;
Applied Chemistry for Engineering, volume 27, issue 3, 2016, Pages 307~312
DOI : 10.14478/ace.2016.1037
Lead molybdate (
) was successfully synthesized using a facile surfactant-assisted hydrothermal process and characterized by XRD, Raman, TEM, PL, BET and DRS. We also investigated the photocatalytic activity of these materials for the decomposition of Rhodamine B under UV-light irradiation. From XRD and Raman results, well-crystallized
crystals were successfully synthesized with the particle size of 52-69 nm.
catalysts prepared in the presence of cetyltrimethyl ammonium bromide (CTAB) enhanced the photocatalytic activity compared to that of using P-25 and pure
catalysts. The maximum photocatalytic activity of
catalyst were observed when preparing it in pH 9 solution. The The PL peak at about 540 nm were observed for all catalysts and the excitonic PL signal increased proportionally with respect to the photocatalytic activity of Rhodamine B.
Immobilization of Late Transition Metal Catalyst on the Amino-functionalized Silica and Its Norbornene Polymerization
Pacia, Rose Mardie P. ; Kim, So Hui ; Lee, Jeong Suk ; Ko, Young Soo ;
Applied Chemistry for Engineering, volume 27, issue 3, 2016, Pages 313~318
DOI : 10.14478/ace.2016.1041
In this study, an amorphous silica was functionalized with aminosilane, N-[(3-trimethoxysilyl)propyl]ethylenediamine (2NS) and the late transition metal catalysts including (
(COD)) were subsequently immobilized on the functionalized amorphous silica for norbornene polymerization. Effects of the polymerization temperature, polymerization time, Al/Ni molar ratio, and type of co-catalyst on norbornene polymerization were investigated. Unsupported late transition metal catalysts did not show any activities for norbornene polymerization. However, the
/2NS/Ni catayst with MAO system, with increasing polymerization temperature, increased the polymerization activity and decreased the molecular weight of the polynorbornene (PNB). Furthermore, the catalyst when increasing polymerization temperature caused the decrease in both the polymerization activity and molecular weight of PNB. This confirmed that the stability of
/2NS/Ni at a high temperature was greater than that of
/2NS/Pd. Also the longer polymerization time resulted in the higher conversion of norbornene for both catalysts. When the Al : Ni molar ratio was 1000 : 1, the highest activity (15.3 kg-PNB/(
)) but lowest molecular weight (
= 124,000 g/mol) of PNB were achieved. Also
/2NS/Ni catalyst with borate/TEAL resulted in diminishing the polymerization activity and molecular weight of PNB with increasing the polymerization temperature.
Effect of E-beam Radiation with Acid Drenching on Surface Properties of Pitch-based Carbon Fibers
Jung, Min-Jung ; Park, Mi-Seon ; Lee, Sangmin ; Lee, Young-Seak ;
Applied Chemistry for Engineering, volume 27, issue 3, 2016, Pages 319~324
DOI : 10.14478/ace.2016.1042
In this study, pitch-based carbon fibers in the acid were radiated with an electron beam to modify their surface, and surface changes were investigated according to each treatment conditions. Nitric acid and hydrogen peroxide were used as a drenched acidic solution and an electron beam dose was set to 200 and 400 kGy. The use of nitric acid introduced more oxygen functional groups on carbon fiber surfaces than that of using hydrogen peroxide, and also introduced nitrogen functional groups into the carbon fiber surface. In addition, oxygen functional groups introduced on carbon fiber surface increased as the electron beam dose increased due to the fact that the oxidizing material can be easily formed by e-beam radiation in nitric acid than the hydrogen peroxide, and also the higher energy electron beam dose can help forming more oxidizing materials. Moreover, the generation of C=O functional groups was favorable when using nitric acid because oxidizing C-OH functional groups to the C=O functional groups mainly occurred by
radicals generated by the electron beam radiation in a nitric acid solution.
Chromaticity Analysis of Natural Dyes Extracted from Sappan Wood, Gardenia, and Mugwort
Lee, Seung Bum ; Kang, Hye Jin ; Park, Myung Sun ;
Applied Chemistry for Engineering, volume 27, issue 3, 2016, Pages 325~329
DOI : 10.14478/ace.2016.1044
Extracting natural dyes have been widely studied since the needs of eco-friendly and non-toxic natural dyes increased. In this paper, the natural dyes were extracted from sappan wood, gardenia, and mugwort containing brazilein, crocin, and chlorophyll process. After the extraction with variables of pH of solvent and reaction time, the chromaticity of extracted natural dyes was analyzed using quantitative values from brightness and color coordinate (L, a, b) based on the target colors of red, yellow and green. For the case of brazilein and crocin, the cadmium red and cadmium yellow, respectively were extracted. In the case of sappan wood and gardenia, the red pigment under pH 12 (
= 18.2) and the yellow pigment at pH 9 (
= 18.4) were extracted respectively. However, the color of extracted chlorophyll from mugwort was different from the target chrome green.
Removal of Cadmium Ions Using Robina pseudoacacie Bark
Choi, Suk Soon ; Kim, Min-Ji ; Cha, Hyung Joon ;
Applied Chemistry for Engineering, volume 27, issue 3, 2016, Pages 330~334
DOI : 10.14478/ace.2016.1045
Because several wood barks are massively produced in the forest area of Chungbuk province, it is required to develop technologies for their effective utilization. In this study, three kinds of barks from Robina pseudoacacie, Pinus densiflora, and Castanea crenata were used to remove water-soluble cadmium ions having 10, 20, 50, and 100 mg/L concentrations in each batch experiments, and R. pseudoacacie bark was selected as the most excellent biosorbent. Also, treatments with various acids and bases were performed to increase the removal efficiency of 100 mg/L cadmium ions using R. pseudoacacie bark as a biosorbent. When R. pseudoacacie bark was modified with 0.5 M KOH, the relatively high removal efficiency and adsorption amount of cadmium ions were obtained. In addition, when 9 M KOH-treated R. pseudoacacie bark was used for 30 min, the highest removal efficiency of 100 mg/L cadmium ions was 84.3%. Therefore, this experimental result can be effectively used as an environmental-friendly bioremediation technology to remove cadmium ions existed with various concentrations in water bodies and soils.
Numerical Analysis for Impurity Effects on Diffusive-convection Flow Fields by Physical Vapor Transport under Terrestrial and Microgravity Conditions: Applications to Mercurous Chloride
Kim, Geug Tae ; Kwon, Moo Hyun ;
Applied Chemistry for Engineering, volume 27, issue 3, 2016, Pages 335~341
DOI : 10.14478/ace.2016.1028
In this study, impurity effects on diffusive-convection flow fields by physical vapor transport under terrestrial and microgravity conditions were numerically analyzed for the mixture of
system. The numerical analysis provides the essence of diffusive-convection flow as well as heat and mass transfer in the vapor phase during the physical vapor transport through velocity vector flow fields, streamlines, temperature, and concentration profiles. The total molar fluxes at the crystal regions were found to be much more sensitive to both the gravitational acceleration and the partial pressure of component
as an impurity. Our results showed that the solutal effect tended to stabilize the diffusive-convection flow with increasing the partial pressure of component
. Under microgravity conditions below
, the flow fields showed a one-dimensional parabolic flow structure indicating a diffusion-dominant mode. In other words, at the gravitational levels less than
, the effects of convection would be negligible.