• 한국초전도저온공학회:학술대회논문집
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• 한국초전도저온공학회 2003년도 학술대회 논문집
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• pp.146-148
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• 2003

SrZrO$_3$ resistive oxide barriers on Ag sheathed Bi2223 monocore tapes were prepared by the sol-gel and dip coating method to reduce AC coupling loss. The performance of the dip-coated SrZrO$_3$ thin films was evaluated in terms of bond strength and surface microstructure by varying the amount of PVP (polyvinylpyrrolidone) binder. Although bond strength and coating thickness increased as the PVP content rose, surface microcracking was more severe for the specimen containing higher content of PVP binder. It suggests that coating thickness and microcracking of the SrZrO$_3$ films on Bi2223 tapes was governed primarily by the amount of PVP binder.

• 한국식품저장유통학회지
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• 제19권6호
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• pp.813-817
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• 2012

신선절단 '후지' 사과의 갈변도에 화학물질(ascorbic acid, cystein, sodium chloride, magnesium chloride, calcium chloride, histidine: 1% 용액), 한약재(갈근, 당귀, 산약, 오약, 천궁, 황기: 1% 추출액), 가열(절단과실과 원형과실, $40-60^{\circ}C$ 증류수) 및 코팅(albumin, dextrin, sucrose poly ester, whole soy flour: 0.5-4% 용액) 처리가 미치는 영향을 조사하였다. 각 처리방법별 신선절단 사과의 갈변도는 1% calcium chloride 용액 처리, 황기 추출물 처리, 3% dextrin과 1% whole soy flour 코팅 처리에 의해 가장 낮은 수준을 보였다. 가열처리의 갈변도는 절단과실 처리시에는 $50^{\circ}C$에서, 원형과실 처리시에는 $45^{\circ}C$에서 각각 처리한 시료에서 가장 낮은 수준을 보였다. 이로써 신선절단 사과의 갈변에 대한 한약재 추출물, 가열 및 코팅 처리의 억제 효과와 조건이 확인되었고, 이러한 방법은 화학물질을 부분적으로 대체할 수 있을 것으로 판단된다.

• 전기화학회지
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• 제8권4호
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• pp.162-167
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• 2005

본 연구는 Pechini법을 이용하여 Ca과 Sr이 도핑된 $LaCrO_3$계의 $La_{0.6}Ca_{0.41}CrO_3$ (LCC41), $La_{0.8}Sr_{0.05}Ca_{0.15}CrO_3$, (LSCC), $La_{0.75}Ca_{0.27}CrO_3$ (LCC27) 분말들을 제조하여, 분말의 소결 특성 및 코팅층의 특성을 조사하였다. 제조된 LCC41, LSCC, LCC27 분말은 각각 0.6, 0.9, $1.5{\mu}m$의 평균 입자크기를 가졌으며, LCC41의 경우 $1400^{\circ}C$에서 98% 이상의 소결 밀도를 나타내었다. 연료극 지지체상의 LSCC 코팅은 LCC41층에 있는 Ca의 이동을 어느 정도 억제하는 역할을 하는 것으로 나타났다. 대기 용사 코팅된 LCC27은 치밀한 코팅막을 형성하였으며, 이 코팅층 위에 LCC41을 습식 코팅할 경우 더욱 치밀하고 높은 전기전도도를 갖는 코팅막을 얻을 수 있었다. 용사코팅된 LCC27, 습식 코팅된 LCC41는 높은 전기전도도를 나타내었으나, LSCC의 경우 낮은 소결성으로 인해 전기전도도가 작게 나타났다.

• 한국세라믹학회지
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• 제49권1호
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• pp.95-99
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• 2012

Silicon carbide ceramics are used for oxidation resistive coating films due to their excellent properties like high strength, good oxidation resistance, and good abrasion resistance, but they have poor formability and are prepared by vapor process which is complicated, costly, and sometimes hazardous. In this study, preparation of silicon carbide coating film by liquid process using polymer precursor was attempted. Coating film was prepared by dip coating on substrate followed by heat treatment in argon at $1200^{\circ}C$. By changing the dipping speed, the thickness was controlled. The effects of plasticizer, binder, or fiber addition on suppression of crack generation in the polymer and ceramic films were examined. It was found that fiber additives was effective for suppressing crack generation.

• Membrane and Water Treatment
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• 제13권4호
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• pp.191-199
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• 2022

In industrial production, the development of traditional polyamide nanofiltration (NF) membrane was limited due to its poor oxidation resistance, complex preparation process and high cost. In this study, a composite NF membrane with high flux, high separation performance, high oxidation resistance and simple process preparation was prepared by the method of dilute solution dip coating. And the sulfonated polysulfone was used for dip coating. The results indicated that the concentration of glycerin, the pore size of the based membrane, the composition of the coating solution, and the post-treatment process had important effects on the structure and performance of the composite NF membrane. The composite NF membrane prepared without glycerol protecting based membrane had a low flux, when the concentration of glycerin increased from 5% to 15%, the pure water flux of the composite NF membrane increased from 46.4 LMH to 108.2 LMH, and the salt rejection rate did not change much. By optimizing the coating system, the rejection rate of Na₂SO₄ and PEG1000 was higher than 90%, the pure water flux was higher than 40 LMH (60psi), and it can withstand 20,000 ppm.h NaClO solution cleaning. When the post treatment processes was adjusted, the salt rejection rate of NaCl solution (250 ppm) reached 45.5%, and the flux reached 62.2 LMH.

• 전자진흥
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• 제3권9호
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• pp.79-83
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• 1983

• 한국표면공학회:학술대회논문집
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• 한국표면공학회 1998년도 춘계학술발표회 초록집
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• pp.80-81
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• 1998

• 한국표면공학회:학술대회논문집
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• 한국표면공학회 2003년도 추계학술발표회초록집
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• pp.38-39
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• 2003

• Korean Chemical Engineering Research
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• 제40권6호
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• pp.725-728
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• 2002

NOx와 먼지 동시 제거용 기능성 여과포 개발의 일환으로 $V_2O_5/TiO_2$ 계열의 상용촉매를 사용하여 P-84, Nomex, PTFE 여과포에 코팅하였다. 사용된 코팅 방법은 Sol-gel법, Spray 법 그리고 Dip 코팅 방법이었으며 코팅방법이 여과포의 NOx 제거 반응에 미치는 영향을 조사하였다. NOx 제거반응실험은 여과포의 작동온도에 맞는 $100-250^{\circ}C$의 반응온도범위에서, 공간속도 $5,000hr^{-1}$, 산소농도 6%, $NH_3/NO$ 몰비는 1.0의 조건하에서 수행되었다. 본 연구에서 시도된 세 가지 코팅 방법 중 촉매량의 조절 및 균일한 코팅이 용이한 Sol-gel법에 의해 제조된 기능성여과포가 가장 좋은 NOx 전환율을 나타냈다.

• 한국전기전자재료학회논문지
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• 제25권7호
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• pp.531-536
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• 2012

We herein present results of flat and uniform polymer-blended small molecular semiconductor thin films. Which were produced for organic thin film transistors (OTFTs), using a simple pre-metered horizontal dipping process. The organic semiconducting thin films were composed of 6,13-bis(triisopropylsilylethynyl)-pentacene (TIPS-PEN) composite blended with a polymer binder of poly(${\alpha}$-methylstyrene) (PaMS). We show that the pre-metered horizontal-dip-coating(H-dip-coating) process allowed the critical control of the thickness of the blended TIPS-PEN:PaMs thin film. The fabricated OTFTs using the TIPS-PEN:PaMs films exhibited maximum field-effect mobility of $0.22\;cm^2\;V^{-1}\;s^{-1}$. These results demonstrated that H-dip-coated TIPS-PEN:PaMS films show considerable promise for the production of reliable, reproducible, and high-performance OTFTs.