• 청정기술
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• 제3권2호
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• pp.57-73
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• 1997

금속세정은 제품의 품질향상은 물론 후속공정에도 지대한 영향을 미친다. 그러나 이러한 세정공정은 환경적으로 많은 유해성을 내포하고 있기 때문에 개선해야될 여러 문제점들을 가지고 있고 게다가 전지구적으로 세정제로 인한 규제가 강화되고 있으므로 기존의 염소계세정제를 대체할 수 있는 대체세정제의 개발과 이와 연관된 세정공정의 개발이 필수적이라고 할 수 있다. 그러므로 본 연구에서는 최적의 대체세정제를 선정하기 위하여 고려해야되는 인자들을 분류하였고 세정공정에 적용된 개선사례들을 통하여 결과를 분석하고 개선점을 모색함으로써 세정공정에서의 청정기술적 접근방법을 제시하였다.

• 전자공학회논문지 IE
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• 제48권2호
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• pp.47-51
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• 2011

본 논문은 LCD등에 사용되는 유리기판 가공 과정에서 표면에 발생하는 이물질을 제거하기 위한 세정 시스템을 제안한다. 이 세정 공정 시스템은 알카리 전해수의 화학적 세정과 과열 수증기 시스템의 물리적 세정방법을 사용한 세정, 린스, 건조 공정으로 구성된다. 또한 세정 시스템에서 사용되는 알카리 전해수의 화학적 세정효과를 실험을 통해, 알카리 전해수의 세정 효과와 과열 수증기 시스템의 제거효과를 보인다.

• 보존과학회지
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• 제11권1호
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• pp.28-37
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• 2002

문화재 보존을 위한 처리 과정에는 반드시 세척이 행하여지며, 이 때 세척은 완벽한 세정뿐만 아니라 2차 오염 발생이나 훼손 등에 각별히 조심하여야 한다. 따라서 본 연구에서는 보다 과학적인 방법으로 석조문화재 보존 처리용 세정제를 개발하기 위하여, 국내 석조물에 기생하는 미생물과 오물을 시료로 채취하여 FT-IR분석을 통하여 석재 오물의 화학적인 관능기를 파악하고, 각종 용매를 처리하여 그 용출 특성을 파악하였으며, 세정제에 의한 세정 효과와 풍화율에 대하여 연구하였다. 실험 결과로부터 석재 문화재 세정용 계면활성제로는 산성용액에서도 안정하며, 석재 구성물질과의 반응성이 적고, 각종 2차 오염 발생 가능성이 적으며, 산화제와 산의 활성을 증가시킬 수 있는 비이온 계면활성제가 적당한 것으로 판단되었다. 본 연구에서 개발한 $H_2O_2/HF/NP-10$ 복합형 세정제는 적용실험 결과, 석조 문화재 처리용 세정제로서 좋은 세정력을 가지고있는 것으로 판단된다.

• 대한가정학회지
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• 제20권3호
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• pp.55-63
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• 1982

We are studying on the home economics, particularly tools and machines used in household affairs. The object of this paper is to rationalize house cleaning method and to improve the used cleaning tools. We have made a social survey in Korea about the real situation of house cleaning as the first phase of this research. The contents are as follows: 1) The consciousness of housemakers for house cleaning. 2) The methods of house cleaning. 3) The used type of vacuum cleaner. 4) Merits and demerits of vacuum cleaner. 5) Troubles of vacuum cleaner etc. The results has been made in comparison with the same social survey in japan and a small scale different survey in The United States of America by auther in 1979. The results are as follow (in Korea). 1. The almost of housemakers are affirmative in charge of household affairs(95%). 2. In household affairs, only 9% of housemakers dislike cleaning work, but 40% of housemakers do not a cleaning work as a daily periodically. 3. In general household, they do a cleaning work with broom, duster and dust cloth, and then the cleaning work is faily backward in mechanization(The possession of vacuum is 19%). 4. The main dissatisfaction of vacuum cleaner is a noise, and also the difficulty of the cleaning in a corner of the room is shown in high percentage too.

• 청정기술
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• 제7권1호
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• pp.13-25
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• 2001

정밀 기계산업과 반도체 산업의 진보와 더불어 대상물의 초순도 세정이 하이테크 산업발전에 가장 중요한 핵심기술로 부각되고 있다. 현재 초순수 세정은 크게 습식세정과 건식세정으로 분류하고 있다. 습식세정의 경우 오랜 경험과 높은 세정효율을 보이고 있지만, 다량의 탈이온수에 과산화수소, 황산, 불산 또는 수산화 암모늄 등의 독성첨가제를 반복적으로 사용하고 있어 독성 폐수발생등 심각한 환경오염을 유발하고 있다. 따라서, 최근에는 습식 세정에 따른 환경오염의 문제를 개선하기 위한 노력으로 몇 가지 건식 세정기술이 개발되고 있다. 최근 들어 건식세정 방법 중에 소위 초임계상태의 환경 용매를 사용하는 기술이 개발되고 있으며, 높은 세정효율과 더불어 환경친화성이 높은 유망한 기술로 받아들여지고 있어 국제적인 관심이 집중되고 있다. 이 논문에서는 초임계 이산화탄소 세정에 관심을 두어, 초임계 용매의 물리화학적 특성과 환경친화측면, 세정공정의 엔지니어링, 그리고 국내외 기술 현황을 종합적으로 분석 평가하였다.

• Journal of Korean Dental Science
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• 제3권2호
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• pp.26-33
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• 2010

We searched at the "PubMed.gov" and "jendodon.com" sites to conduct a literature review on dental instruments that are reused in clinical settings and on infection control involving pre-disinfection or sterilization cleaning/rinsing. The keyword "dental clean" was used for the Web search. We found the present official definition of instrument cleaning performed prior to disinfection or sterilization rather limiting ("removal of foreign matter (soil, organism, etc.) from the instruments"). Thus, we proposed to expand the definition to include the removal of oils applied to protect the metallic instruments and from corrosion, stains, and rust resulting from the frequent reuse of the instruments. Clinicians are found to clean their dental instruments (a) immediately after treating their patients or (b) following their treatment but not immediately afterward. In the latter case, we recommend presoaking to be added. Ultrasonic sterilization of 5~15 minutes is found to be more effective in terms of eliminating residual matter from the instruments compared to other methods. To check on the cleaning results, we recommend visual inspection, which can be quick and practical in clinical settings. The latest products being developed and marketed on the market address the related problems. Nonetheless, research must be continued on the effects of presoak, cleaning/rinsing, disinfection, and high-temperature or heating-based sterilization on the dental instruments and on dental clinicians' practices in cleaning, disinfection, and sterilization. We advise dental clinicians to select the proper cleaning methods and detergents for their instruments to help eliminate or prevent corrosion, staining, and rusting, to reduce the maintenance costs, and to ensure user-friendly instruments/apparatuses.

• 한국재료학회:학술대회논문집
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• 한국재료학회 2010년도 춘계학술발표대회
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• pp.24.1-24.1
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• 2010

In practical operation, the exposed surfaces may get dirty thus degrade the performance of devices. So the combination of self cleaning and antireflection is very desirable for use in outdoor photovoltaic and displaying devices, self cleaning windows and car windshields. For the purpose of self cleaning, the surface needs to be either superhydrophobic or superhydrophilic. However, in practice AR in the visible region and self cleaning are a pair of competitive properties. To satisfy the requirements for superhydrophobic or superhydrophilic surfaces, high surface roughness is required. But it usually cause severely light scattering. Photo-responsive coatings (TiO2, ZnO etc.) can lead to superhydrophilic. However, the refractive indices are high. Thus for porous structure, controlling pore size in the underwavelength scale to reduce the light scattering is very crucial for highly transparent and self cleaning antireflection coating. Herein, we demonstrate a simple method to make high performance broadband antireflection layer on the glass surface, by "carving" the surface by hot alkali solution. Etched glass has superhydrophilic surface. By chemical modification, it turns to superhydrophobic. Enhanced transparency (up to 97%) in a broad wavelength range was obtained by short time etching. Also antifogging effect has been demonstrated, which may offer advantage for devices working at high humidity environment or underwater. Compositional dependence of the properties was observed by comparing three different commercially available glasses.

• 한국응용과학기술학회지
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• 제27권2호
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• pp.107-113
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• 2010

The object of this research is to conform of practicable possibility and recycling of producing junk after citrus fruits is processed. With extracting d-limonene oil that have 70~90% a component of oil out of junk citrus peel, making certain the about 12000ppm concentration of it. Limonene derived from citrus in jeju using conventional synthetic detergents can be replaced with the development of environmentally friendly natural detergent investigated the possibility. Mostly due to ocean dumping, disposal and cause environmental problems by recycling natural citrus cleaner alternative to the research conducted on the possibility. Cleaning efficiency with temperature did not affect the largest concentrations were able to identify the difference between cleaning efficiency. At least 10% of the d-limonene oil could be from the cleaning performance, increasing the concentration of the cleaning efficiency was increased in size. Ultrasonic is very high removal efficiency under the conditions shown in the cause of pure self-generated ultrasonic cleaning power as co-effects of d-limonene oil appears to chemical cleaning effect of ultrasonic cavitation occurs in the physical cleaning effect due to a combination of synergistic stability is maximized by low concentrations of d-limonene oil in a short time showed an excellent cleaning ability. Having the ability of cleaning at the same time, considering the side recycling in the junk citrus peels reflects possibility of basic materials utility eco-friendly in the skin soap, bath soap, cosmetics etc, through ability of exclusion a contaminant in based cleaning effect(EC) it can prospect substitution effect environmentally in the pre existence synthetic detergents.

• 한국염색가공학회:학술대회논문집
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• 한국염색가공학회 2008년도 제38차 학술발표대회
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• pp.181-183
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• 2008

Four different subtilisins of protease were investigated to see their effects on the cleaning activity. The cleaning solution was formulated with various non-ionic surfactants and other additives such as propylene glycol, triethanolamine, pH balancer etc. to evaluate their effect on enzyme activity as well. Evaluation of formulated cleaning solution was carried under K0120 using pre-soiled textiles from EMPA. The results showed that the cleaning activity on soil removal was not severly influenced by surfactant but the enzyme mostly. In addition, the activity of enzymes was not much affected by the type of surfactants as long as the surfactants were non-ionic. Liquinase among the four enzymes used in this study showed the best performance on soil removal, especially blood stain.

• 박물관보존과학
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• 제6권
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• pp.73-83
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• 2005

지류문화재의 보존처리과정에서 실시되는 습식크리닝의 영향을 알아보기 위해 습식크리닝 전과 후의 물성변화를 관찰하였다. 조사방법으로 고지와 현대지 7종을 각각 습식크리닝 전과 후의 구조적, 광학적, 강도적 성질의 변화를 측정하였다. 그 결과 습식크리닝은 지류문화재의 물성변화를 일으키고 특히 안료, 먹, 염료 등의 구성성분을 약화시킬 수 있음을 확인할 수 있었다.