http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
이산화규소/아크릴계 유기물의 코어-셀 합성에서 음이온 계면활성제의 영향
김덕술(Duck Sool Kim),박근호(Keun Ho Park) 한국유화학회 2008 한국응용과학기술학회지 Vol.26 No.2
Silicone dioxide absorbed polyoxyethylene alkylether sulfate (EU-S133D) surfactant was prepared. Core-shell polymers of inorganic/organic pair, which have both core and shell component, were synthesized by sequential emulsion polymerization using Acrylate as a shell monomer and potassium persulfate (KPS) as an initiator. We found that when Acrylate core prepared by adding 2.0 wt% EU-S133D, silicone dioxide/Acrylate core-shell polymerization was carried out on the surface of silicone dioxide particle without forming the new silicone dioxide particle during acrylate shell polymerization in the inorganic/organic core-shell polymer preparation. The structure of core-shell polymer were investigated by measuring to the thermal decomposition of polymer composite using thermogravimetric analyzer and morphology of latex by scanning electron microscope(SEM).
Electrochemical Properties of Silicon Dioxide Particles synthesized by Using Sol-gel Method
Hien Ngoc Thi Le,정혜경 한국물리학회 2013 새물리 Vol.63 No.2
A novel way to synthesize silicon-dioxide particles by using silicon tetrachloride and 2- methoxyethanol and a sol-gel method has been developed. Different sizes and densities of the silicon-dioxide (SiO2) particles were formed on Ni foils at different spin-coating speeds of 2000, 3000, and 4000 rpm for 20 seconds. Scanning electron microscopy results showed that SiO2 particles had been at all speeds and that the distribution of particles at 4000 rpm was the best. Cyclic voltammetry and electrochemical impedance spectroscopy were also used to characterize the electrochemical properties of the obtained samples for energy-storage-device applications
계면활성제 Sodium Dioctyl Sulfosuccinate (EU-DO133L)을 사용한 이산화규소/ 스티렌의 코어-셀 고분자의 합성
김덕술(Duck Sool Kim),박근호(Keun Ho Park) 한국유화학회 2009 한국응용과학기술학회지 Vol.27 No.2
Core-Shell polymers of silicone dioxide-styrene system were prepared by sequential emulsion polymerization. In inorganic/organic Core-Shell composite particle polymerization, silicone dioxide adsorbed by surfactant sodium dioctyl sulfosuccinate (EU-DO133L) was prepared initially and then core silicone dioxide was encapsulated emulsion by sequential emulsion polymerization using styrene at the addition of potassium persulfate (KPS) as an initiator. We found that SiO2 core shell of SiO2/styrene structure was formed when polymerization of styrene was conducted on the surface of SiO2 particles, and the concentration sodium dioctyl sulfosuccinate (EU-DO133L) was 0.5∼2.0g. The structure of core-shell polymer were investigated by measuring to the thermal decomposition of polymer composite using thermogravimetric analyzer and morphology of latex by scanning electron microscope(SEM).
K 및 Al 이중이온주입된 SiO$_2$ 박막의 pH, pNa 및 pK 농도 감지특성에 관한 연구
김병수,신백균,이붕주,이덕출 대한전기학회 2003 전기학회논문지C Vol.53 No.10
Silicon dioxide (SiO$_2$) layers were fabricated on Si$_3$N$_4$/SiO$_2$/Si layer structures by low pressure chemical vapor deposition (LPCVD). Potassium and aluminum were then coimplanted by implanting potassium ions with the energy of 100 [keY] and dose of 5x10$^{16}$ [cm ̄$^2$] and 1x10$^{17}$ [cm ̄$^2$] into an aluminum buffer layer on the SiO$_2$Si$_3$N4/SiO$_2$/Si structure. The pH, pNa, and pK ion sensitivities of the resulting layers were investigated and compared to those of as-deposited silicon dioxide layer. The pK-sensitivity of the silicon dioxide was enhanced by the K and Al coimplantation. On the contrary, the pH and pNa-sensitivities of the coimplanted silicon dioxides were quite lower than that of the as-deposited silicon dioxide.
진의,정영진 한국공업화학회 2019 한국공업화학회 연구논문 초록집 Vol.2019 No.1
In this study, titanium dioxide/silicone sol was applied to the cypress wood which is the building interior material to reduce the damage caused by the smoke in the fire and smoke density was investigated in flaming mode using smoke density chamber. The titanium dioxide/silicone sol was measured for smoke density according to the ASTM E 662 test method based on performance standard of flame retardancy. The maximum smoke density of wood coated with flame retardants increased in the order of TiO<sub>2(A)</sub>TSS<TiO<sub>2</sub>(A)SS<TiO<sub>2</sub>(R)SS<TiO<sub>2</sub>(R) TSS, which was less than 400, which is the fire safety standard for wood. The smoke density at the beginning of the fire (VOF4) increased in the order of TiO<sub>2</sub>(A)SS<TiO<sub>2</sub>(R)TSS<TiO<sub>2</sub>(A)TSS<TiO<sub>2</sub>(R)SS, and TiO<sub>2</sub>(R)SS was the most dangerous materials due to the highest smoke density at the beginning of the fire.
생약 추출물 함유 정제 제조를 위한 이산화규소 함유 분말의 제조 및 평가
박진우,진성규,Park, Jinwoo,Jin, Sung Giu 한국분말재료학회 (*구 분말야금학회) 2021 한국분말재료학회지 (KPMI) Vol.28 No.3
The purpose of this study is to optimize the powder formulation and manufacturing conditions for the solidification of an extract of the herb Bangpungtongseong-san (BPTS). To develop BPTS-loaded particles for the tablet dosage form, various BPTS-loaded particles composed of BPTS, dextrin, microcrystalline cellulose (MCC), silicon dioxide, ethanol, and water are prepared using spray-drying and high shear granulation (high-speed mixing). Their physical properties are evaluated using scanning electron microscopy and measurements of the angle of repose, Hausner ratio, Carr's index, hardness, and disintegration time. The optimal BPTS-loaded particles exhibit improved flowability and compressibility. In particular, the BPTS-loaded particles containing silicon dioxide show significantly improved flowability and compressibility (the angle of repose, Hausner ratio, and Carr's index are 35.27 ± 0.58°, 1.18 ± 0.06, and 15.67 ± 1.68%, respectively), hardness (18.97 ± 1.00 KP), and disintegration time (17.60 ± 1.50 min) compared to those without silicon dioxide. Therefore, this study suggests that particles prepared by high-speed mixing can be used to greatly improve the flowability and compressibility of BPTS using MCC and silicon dioxide.
비정질 SiO₂의 리튬 충/방전 과정 시 비선형 거동 멀티스케일 해석
문장혁(Janghyuk Moon),곽윤기(Yunki Gwak),이상관(Sangkoan Yi),조맹효(Maenghyo Cho) 대한기계학회 2015 대한기계학회 춘추학술대회 Vol.2015 No.11
Silicon dioxide material is considered as the next promising anode material due to high theoretical capacity and mechanical stability compared to silicon. Since the chemical interaction between lithium and active material is local, first-principles mechanical calculation is performed to understand the macroscopic mechanical behavior, such as inelastic deformation. In this study, we simulate the stress evolution in a-SiO2 thin film electrode subject to a lithiation and delithiation cycle by employing density function theory calculation. We compare the results with the a-Si thin film anode. The a-SiO2 as anode material shows the brittle behavior compared to silicon during lithiation. The maximum stress of SiO2 in the thin film shows a value of 4 ㎬ (1.5 ㎬ in Si).
Malakkal Linu,Prasad Anil,Ranasinghe Jayangani,Jossou Ericmoore,Bichler Lukas,Szpunar Jerzy 한국원자력학회 2023 Nuclear Engineering and Technology Vol.55 No.10
Thorium dioxide (ThO2)-silicon carbide (SiC) composite fuel pellets were fabricated via the spark plasmasintering (SPS) method to investigate the role of the addition of SiC in enhancing the thermal conductivity of ThO2 fuel. SiC particles with an average size of 1mm in 10 and 15 vol% were used to manufacture the composite pellets. The changes in the composites' densification, microstructure and thermal conductivity were explored by comparing them with pure ThO2 pellets. The structural and microstructural characterization of the composite pellets has revealed that SPS could manufacture high-quality composite pellets without having any reaction products or intermetallic. The density measurement by the Archimedes principles and the grain size from the electron back-scattered diffraction (EBSD) analysis has indicated that the composites have higher densities and smaller grain sizes than the pellets without SiC addition. Finally, thermal conductivity as a function of temperature has revealed that sintered ThO2eSiC composites showed an increase of up to 56% in thermal conductivity compared to pristine ThO2 pellets