http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : 노윤찬 (검색결과 29 건)
- 무료
- 기관 내 무료
- 유료
-
양쪽성 계면활성제의 유도체 합성 및 계면성에 관한 연구 ( 제6보 ) - 양쪽성 계면활성제의 미셀 형성에 대한 열역학적 고찰
노윤찬,이선주,남기대 ( Y . C . Ro,S . J . Lee,K . D . Nam ) 한국공업화학회 1995 공업화학 Vol.6 No.4
The critical micelle concentrations(cmc) was studied on nine kinds of amphoteric surfactants; three kinds of carboxylated amides, three kinds of sulfated or sulfonated imidazoline and three kinds of sulfonated amides at 15 to 45℃ range. The change of free energy about micelle formation can be converted into the change of enthalpy and entropy. The standard free energy change ΔG˚m of micellization was estimated from the cmc, by treating the formation of micelles as thermodynamics; the determination of the variation of cmc the enables ΔG˚m to be split into the correspondingΔH˚m and ΔS˚m. These results were examined by making a comparison between this results and the previously known values. The process of micelle formation obtained the result that perfactly was attributed to interface effect and the exothermic reaction which ΔH˚m values were -1.2∼-2.3Kcal/㏖ was not related with temperature at 15 to 45℃ range. The interface effect was decresed with the hydrophilic increase of the amphoteric surfatants. The process of micelle formation was proceeded spontaneously at 15 to 45℃ range and entrophy increased with consisting of micelle formation to control entrophy process.
-
-
노윤찬,이승렬,윤영균,남기대 ( Y . C . Ro,S . Y . Lee,Y . K . Yun,K . D . Nam ) 한국공업화학회 1994 공업화학 Vol.5 No.5
The detergencies of these new functional anionic surfactants, sodium monoglycerol α-sulfonated alkanoates, were investigated and compared with those of two commercial surfactants, that is, sodium α-sulfonated alkanoic acid methyl ester and sodium alkyl benzene sulfonate. According to the variation of the hydrophobic alkyl chain length, the order of detergency was shown to be C_(16)>C_(18)>C_(14)>C_(12). From the comparision experiment for the detergency and the various fundamental properties of two other surfactants, it was found that sodium monoglycerol α-sulfonated hexadecanonate has the most outstanding characteristics of detergency. Possibly this result shows light on its industrial application as a nonpolluting detergent.
-
-
-
양쪽성 계면활성제의 유도체합성 및 계면성에 관한 연구 ( 제5보 ) - 이미다졸린으로부터 유도된 유도체의 기초적 물성 -
노윤찬,김태영,정진기,남기대 ( Y . C . Ro,T . Y . Kim,J . K . Jeong,K . D . Nam ) 한국공업화학회 1996 공업화학 Vol.7 No.2
Nine kinds of amphoteric surfactants were derived from 1-(2-hydroxyethyl)-2-undecyl-2-imidazoline. Their surface activities including surface tension and isoelectric points were measured in aqueous solution and critical micelle concentration(cmc) was also evaluated by the measurement of surface tension. From the measurement of surface tension, carboxylated amides revealed to be 26∼40dyne/㎝ at 4.0×10^(-4)∼1.0×10^(-3)㏖/ℓ, sulfonated or sulfated imidazolines, 30∼35 dyne/㎝ at 1.5×10^(-3)∼2.5×10^(-3)㏖/ℓ and sulfonated amides, 25∼33 dyne/㎝ at 5.8×10^(-4)∼8.0×10^(-4)㏖/ℓ concentration range. It was found that isoelectric points of carboxylated amides were pH 7.2∼7.9 and those of sulfonated or sulfated imidazolines and sulfonated amides were pH 4.5∼5.5.
-
ABS - PC 블렌드의 엔지니어링 플라스틱상의 니켈 도금 기술
노윤찬,최성옥,이진희,남기대 ( Yun Chan Ro,Sung Ok Choi,Jin Hee Lee,Kie Dae Nam ) 한국화학공학회 1996 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.34 No.6
This paper aims to study and analyze the subject of optimal pretreatment processes for metal plating on engineering plastics, especially on ABS-PC blend resin. For ABS-PC blend resin, preetching process is employed to swell and soften the surface of plastics by immersing in the organic solvent mixtures, just before etching process. Sensitizing process is also employed to increase wettability and adsorption of catalyst, just before activating process. If sensitizing treatment process is not carried out, adhesion strength is very poor. In the result of SEM and surface roughness measurement preetching treatment enable the surface condition to be very rough and adhesion strength to be good. It shows that the relation between surface condition of plated article and adhesion strength depends markedly upon molding condition of ABS-PC blend resin. It, by means of ESCA, aims to what kinds of and how much quantity of the metal elements remain on the resin surface after pretreatment processes. Cr residue does not affect adsorption of Sn and Pd remarkably but adhesion strength is reduced, owing to obstruction between resin surface and Pd.
-
노윤찬,남기대 ( Y . C . Ro,K . D . Nam ) 한국공업화학회 1994 공업화학 Vol.5 No.5
Imidazoline compounds have been developed in many industrial fields(eg. cosmetic, etc.). These materials can be used in almost all pH ranges and recently its use is successively increased because of nonirritative property. Since the concern of safety has enlarged at industrial application, naturaly the use of amphoteric surfactants with new special properties has more. We report general properties of chemical structures of imidazoline surfactants effect.
-
마이크로에멀젼에서 리파아제 촉매에 의한 고급지방산 모노글리세리드의 생성에 있어 최적효과
노윤찬,남기대,김진탁,조경행 ( Yoon Chan Ro,Ki Dae Nam,Jin Tak Kim,Kyung Haeng Jo ) 한국공업화학회 1994 공업화학 Vol.5 No.2
Mono alkyl glycerides have bean obtained in good yield by enzyme catalyst from soybean oil. The reaction was carried out in an oil rich microemulsion formula. Best results were obtained with sodium bis(2-ethyl hexyl) sulfo succinate(AOT), isooctane as hydrocarbon component and buffer of pH 7. The enzyme used was a 1, 3-specific lipase which leaves the 2-position intact. However, the 2-monoglyceride formed slowly undergoes long chain acyl migration to 1-mono-glyceride. Optimal reaction time at 35℃ reaction temperature was found to be three hour.
-
노윤찬 ( Yun-chan Roh ) 한국고등직업교육학회 2000 한국고등직업교육학회논문집 Vol.1 No.2
This study is concerned with the treatment of landfill leachate by carrier meditated emulsion. Using batch operation, the optimal conditions for the removal of anionic and cationic materials were obtained. The landfill leachate from the plant was experimented under these conditions. The experimental variables were the concentration of surfactant(Arlacel80) and the concentration of carrier (Aliquat336, DEHPA) in emulsion phase and counter ion concentration in internal phase. More than 80%(COD) of landfill leachate component could be removed within 12 minutes. The most crucial experimental variable for the removal efficiency was carrier concentration in emulsion. Among other variables, reaction time was more important than removal efficiency.
ScienceON연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
