• 제목/요약/키워드: Washing Solvent

검색결과 87건 처리시간 0.031초

용매세척건조법에 의한 PZT 테입 제조 (Preparation of PZI Tapes by Solvent Washing Dry Method)

  • 신효순;윤석진;김현재
    • 한국전기전자재료학회:학술대회논문집
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    • 한국전기전자재료학회 1999년도 춘계학술대회 논문집
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    • pp.300-303
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    • 1999
  • For the fast dry of the aqueous tape, the process which water was replaced by organic solvent was proposed. So-called, it was the solvent washing dry, Three organic solvents (methanol, ethanol, and acetone) were selected for the washing solvent. The weight loss of the washed tapes was measured to evaluate the dry rate of the tapes and dried tapes were examined the generation of the cracks with the variations of the organic solvent and the washing time. Methanol, ethanol, and acetone were all available organic solvents for this method. The tapes washed in methanol, ethanol, and acetone were dried rapidly for twenty minutes. After thirty minutes, the weight losses were not any more. The solvent of the lower surface tension can decreases the crack of dried tape. If solvent substitutes water completely, though it was fast dried, crack can be eliminated. The tape casting system was designed for the solvent washing dry and prepared. An homogeneous tape was established by continuous tape casting process.

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Solvent Washing Dry Method for Aqueous Tape Casting

  • Yoon, Seok-Jin;Shin, Hyo-Soon;Park, Ji-Won;Kang, Chong-Yun;Kim, Tae-Song;Kim, Hyun-Jai
    • The Korean Journal of Ceramics
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    • 제7권2호
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    • pp.55-57
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    • 2001
  • For the fast dry of the aqueous tape, the process which water was replaced by organic solvent was proposed. Socalled, it was the solvent washing dry. Three organic solvents (methanol, ethanol and acetone) were selected for the washing solvent. The weight loss of the washed tapes was measured to evaluate the dry rate of the tapes and dried tapes were examined the generation of the cracks with the variations of the organic solvent and the washing time. Methanol, ethanol and acetone were available organic solvents for this method. The tapes washed in methanol, ethanol and acetone were dried rapidly for twenty minutes. After thirty minutes, the weight losses were not found any more. The solvent of the lower surface tension can decreases the crack of dried tape. If solvent substitutes water completely, though it was fast dried, crack can be eliminated.

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에탄올 세정에 의한 다환방향족탄화수소 오염토양의 정화 (Clean Up of Polycyclic Aromatic Hydrocarbon Contaminated Soil by Ethanol Washing)

  • 이병대;이진식;김영찬
    • 한국응용과학기술학회지
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    • 제21권4호
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    • pp.313-319
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    • 2004
  • Ethanol washing with distillation as a cleanup process of polycyclic aromatic hydrocarbon(PAH)-contaminated soil was investigated in this study. A multistage ethanol washing with distillation process was applied to three different types of soil, i.e., sandy soil, alluvial soil, and clay with the initial concentration of benzo(a)pyrene 10 mg/kg, benz(a)anthracene 250 mg/kg, and pyrene 100 mg/kg soil. Ethanol was selected as washing solvent because of its high PAH removal efficiency, low cost, and non-toxicity comparing to the other solvent such as isopropyl alcohol and sodium dodecyl sulfate. The satisfactory results (i.e. lower than benzo(a)pyrene 1 mg/kg, pyrene 10 mg/kg, benz(a)anthracene 25 mg/kg, which are the Canada or the Netherlands soil standard) for three types of soils were obtained by at most five-six times washing. It was suggested that organic content in soil decreased the removal efficiency by ethanol washing.

Rheology of Slurries and Effects of Polymer Volume Ratio in Aqueous PZT Tape Casting

  • Yoon, Seok-Jin;Shin, Hyo-Soon;Lee, Dong-Kyun;Kang, Chong-Yun;Park, Ji-Won;Kim, Hyun-Jai
    • The Korean Journal of Ceramics
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    • 제7권1호
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    • pp.16-19
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    • 2001
  • For the fast dry of the aqueous tape, the process which water was reaplaced by organic solvent was proposed. Socalled, it was the solvent washing dry. Three organic solvents (methanol, ethanol and acetone) were selected for the washing solvent. The weight loss of the washed tapes was measured to evaluate the dry rate of the tapes and dried tapes were examined the generation of the cracks with the variations of the organic solvent and the washing time. Methanol, ethanol and acetone were available organic solvents for this method. The tapes washed in methanol, ethanol and acetone were dried rapidly for twenty minutes. After thirty minutes, the weight losses were not found any more, The solvent of the lower surface tension can decreases the crack of dried tape. If solvent substitutes water completely, though it was fast dried, crack can be eliminated.

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세척 용액 및 세척 방법이 3D 프린팅 임시수복용 레진의 굴곡강도에 미치는 영향 (Effect of Washing Solvent and Washing Method on Flexural Strength of 3D-Printed Temporary Resin Material)

  • 김해봄;최재원
    • 한국산업융합학회 논문집
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    • 제27권2_2호
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    • pp.389-395
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    • 2024
  • The purpose of this study was to evaluate the effect of different washing solvents and washing methods on the flexural strength of 3D printed temporary resin. A bar(25 × 2 × 2 mm) was produced with a layer thickness of 50 ㎛ using an LCD-type 3D printer and divided into 15 groups(n = 10, each) according to washing solution(IPA; 99% isopropyl alcohol, TPM; 93% Tripropylene glycol monomethylether, ETL; Ethanol, TWC; Twin 3D Cleaner, and DNC; DIO navi Cleaner) and washing method(Dip; Dip washing, Ultra; Ultrasonic washing, and Auto; Automated washing). All groups were washed for 5 minutes, and post-cured for 5 minutes using a UV LED light curing machine. The Flexural strength was measured using a three-point bending test using a universal testing machine. For statistical analysis, one-way ANOVA, Tukey HSD post hoc test, Kruskal-Wallis test and post-hoc by Bonferroni-Dunn test(𝛼=.05) were performed depending on whether the normality test was satisfied. In all washing solvents except TPM and DNC, the Dip group showed the lowest flexural strength values, while the Auto group showed the highest flexural strength values except for DNC. Additionally, the washing solution showed completely different flexural strength values depending on the washing method.

견직물에 부착한 지용성 오구 및 고형 오구의 제거 (Removal of Oily and Particulate Soils from Silk Fabrics)

  • 이정숙
    • 한국의류산업학회지
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    • 제7권6호
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    • pp.680-688
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    • 2005
  • This study was carried out to investigate on the removal of oily and particulate soils from silk fabrics. Various kinds of solvents were used on the removal of two kinds of soils treated into the silk fabrics. The removal of oily soil was analyzed by liquid scintillation counting method, and the removal of oil and carbon particulate mixed soils was evaluated by measuring of reflectance on the surface of soiled fabrics with/without drysoap in solvent washing by Terg-o-tometer. The surfaces of fabrics were also observed by SEM before and after washing. The results obtained were as follows : oily soils were removed efficiently by various kinds of solvents regardless of kinds of silk fabrics in short washing time. The removal effect of solvents from the soiled silk fabrics were high in the order of isopropyl alcohol>trichloroethane>monochlorobenzene>ethylether>perchloroethylene. Oil and carbon particulate mixed soils could be efficiently removed by adding of drysoap in solvent washing. The removal of mixed soils were increased drastically with rinsing and increased drysoap. The removal of soils was more efficiently removed from degummed silk fabrics than from the raw silk fabrics.

습식아민 CO2 포집설비의 물 세정 단 설계에 따른 흡수제 손실 영향 평가 (The Effect of Designing Washing Column in Post Combustion CO2 Capture Plant on the Losses of Amine Solvent)

  • 한선구;고현신;김성규;최시묵
    • 플랜트 저널
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    • 제13권2호
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    • pp.34-38
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    • 2017
  • 상업규모의 온실가스 저감 기술 중 대표적인 기술 중 하나인 연소 후 습식아민 $CO_2$포집 기술에서 기술의 개발에 중점을 두고 있는 부분이 운영비의 개선 부분이다. 습식아민 $CO_2$ 포집기술에서 사용되는 아민은 대체로 고가의 아민을 사용한다. 고가의 아민을 사용하기 때문에 설비 운영 중 발생하는 흡수제의 손실이 운영비에 영향을 미칠 수 있고 설비의 용량이 커질 수록 운영비는 더욱 커지게 된다. 본 연구에서는 150MW급 석탄화력발전소 배기가스에 아민흡수법 CCS기술을 적용 할 경우 흡수제의 손실이 설비 운영비에 미치는 영향과 물 세정 타워의 설계가 흡수제 손실 절감에 어떠한 영향을 미치는지 살펴 보았다.

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출토 직물의 세탁 방법에 따른 물성 변화 (Physical Property Change of Old Fabrics Depending on Cleaning Method)

  • 배순화;이미식
    • 복식
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    • 제54권1호
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    • pp.1-10
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    • 2004
  • The purpose of this study was to compare the efficiency of four different cleaning method of silk and to fabrics, which were excavated from the sixteenth century tombs. The four cleaning methods were hand washing in water and hand washing in solvent, washing in ultrasonic cleaner, and using of ultrasonic gun after washing in ultrasonic cleaner. The following is the result of the experiment: ㆍBoth silk and jute fabrics shrank the most after hand-wash in water. This cleaning method decreased their thickness the most but changed their strength the least. However, the color of the fabric changed the most after had-wash in water. This washing method might discolor the dyed fabric, so one must check the condition of the fabric thoroughly before washing it. ㆍThe weight and the thickness of the fabric changed little after ultrasonic cleaning. This cleaning method, therefore. is less efficient than hand-water-wash. The use of ultrasonic gun after ultrasonic wash for partial cleansing enhanced the efficiency a little. Nevertheless, this method left stain around the area where the gun was used, and the injected water could damage the fabric. ㆍThe excavated fabric became softer in the cleaning process as the dirt was washed away. In both cases of silk and jute fabrics cleaning, solvent made the fabric softer than water. Washed in solvent, the fabric did not swell. But water penetrated to the fiber during the cleaning process and made the fabric swell. When the water evaporates, the swollen fiber structure collapses and the fabric become stiff. Ultrasonic wash did not cause much change in the flexibility of the fabric, for this method does not remove the dirt as effectively as the other method.

용매 포집장치가 연기 중 Carbonyl 화합물의 분석에 미치는 영향 (The Effect of Solvent Trap Apparatus on the Analysis of Carbonyl Compounds in Cigarette Smoke)

  • 김효근;이존태;윤오섭;이문수
    • 한국연초학회지
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    • 제25권2호
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    • pp.137-143
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    • 2003
  • Among the most popular means of mainstream smoke collection for specific analysis are solvent traps. Determination of the carbonyl compounds as their 2,4-dinitrophenylhydrazones(DNPHs) by HPLC offers increased sensitivity and reproducibility in the analysis of mainstream cigarette smoke. In this work, the mainstream smoke of a reference cigarette(lR4F) was collected in four kinds of gas washing bottles and their effects on the analysis of carbonyl compounds were investigated. The results show that the porosity of fritted glass filter in gas washing bottles exerted profound effect on the composition of the carbonyl compounds in mainstream smoke.

자동차 도장 작업장에서의 유기용제 폭로에 관한 연구 (A Study on Organic Solvent Exposure in Painting Operation of Automobile Manufacturing Industry)

  • 김영식
    • 한국환경보건학회지
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    • 제20권4호
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    • pp.10-16
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    • 1994
  • A Study was performed in order to measure mixed organic solvent concentrations in air of painting operations during January 5-28, 1991. The mixed organic solvent concentrations were analyzed by the gas chromatography. The results were as follows: 1. The detection of organic solvent was highest in aromatic hydrocarbon(68%), and followed by aliphatic hydrocarbon (18%), and ketone (14%). 2. The detection of organic solvent by component category was highest in the grid class solvent (79.4%), and followed by the 3rd class solvent (20.6%). 3. Number of cases exceeding TLVS of mixed solvent level in air was highest on dipping operation (44%), and followed by spray operation (40%), dry and washing operation (33%), and adhensive operation (12%).

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