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Studies on the Surfactants of the N-Acyl Carboxylic Acid(II)
박선영(Park Seon Young),김상춘(Kim Sang Chun),정노희(Jeong No Hee),남기대(Nam Ki Dae) 한국유화학회 1995 한국응용과학기술학회지 Vol.12 No.2
N-아실 아미도에틸 N-아미도 카르복시산 유도체들의 물리적 특성과 계면성이 연구되었다. 묽은 용액의 표면장력은 22~32dyne/cm의 값을 나타냈으며 이들 cmc의 범위는 0.8~6.0mmol/L이었다. 표면장력 저하능은 소수성의 알칼사슬이 길어질수록 그리고 카르복시기와 아미드기 사이의 메틸렌기의 수가 감소할수록 증가하였다. 반응생성물의 구조와 계면성의 관계를 비교ㆍ검토한 바 온화한 Krafft point와 뛰어난 습윤성, 낮은 기포력을 나타내었다.
단백질 / 계면활성제 혼합계에서 기포안정성에 대한 계면조성과 분자확산
박선영(Seon Young Park),김명수(Myung Soo Kim),정노희(Noh Hee Jeong),남기대(Ki Dae Nam) 한국유화학회 2000 한국응용과학기술학회지 Vol.17 No.3
A conductimetric study of foam formed from mixture of the protein, β-lactoglobulin, and the nonioinc surfactant, SML, revealed that their stability was reduced at concentrations of SML in the range 3~10mM. The interaction of SML with β-lactoglobulin was investigated by fluorimetry and a dissociation constant of 0.2μM was calculated for the complex. Surface tension studies confirmed the presence of interaction between the two components and provided evidence for the progressive displacement of β-lactogloblin from the air/water interface with increasing SML concentration. Experiments using air-suspended microscopic thin liquid films revealed transitions in the chainage characteristics and thickness of the film at SML concentrations below that which resulted in destabilization of the foam. However, measurements of surface mobility of fluorescent-labeled β-lactoglobulin by a photobleaching method identified that a transition to a mobile system occurred at a SML concentration which correlated with the onset of instability in the disperse phase. The results would indicate that maintenance of the viscoelastic properties of the surface is paramount importance in determining the stability of interfaces comprising mixtures of protein and surfactant.
박선영(Seon Young Park),김명수,정환경(Hwan Kyeong Jeong),남기대(Ki Dae Nam) 한국유화학회 2000 한국응용과학기술학회지 Vol.17 No.3
The synthesis of N-methyl glucamine was performed in two step reaction. The first step involves the amination between methylamine and glucose in methane. The N-methyl glucamine was obtained by the reduction of using Ni catalyst under the high pressure. The second step was glucamide anionic derivatives synthesis from N-methyl glucamine, maleic anhydride, lauryl alcohol and laurylamine by Schotten Banmann reaction respectively. Their molecular structures of N-methyl glucamine and glucamide (EG-MAS and AC-MAS) were investigated by IR and H-NMR. Basic physical properties and biodegradability of there glucamide anionic surfactant was investigated. The range of cmc values determined by measurements of surface tention was 10^-5~10^-4mol/l and the surface tension of the aqueous solution revealed in the range 28~30 dyne/cm and their biodegradability was very good in the pH 5~10.
Studies on the Surfactants of the N-Acyl Carboxylic Acid
박선영(Park Seon Young),김상춘(Kim Sang Chun),정노희(Jeong No Hee),남기대(Nam Ki Dae) 한국유화학회 1995 한국응용과학기술학회지 Vol.12 No.2
2염기성 산의 모노메틸에스테르류와 에틸렌디아민을 반응시켜 얻은 아미도아민 유도체류를 고급지방산 염화물로 아실화하여 N-아실 아미도에틸 N-아미도카르복시산 유도체 9종을 합성하였다. 카르복시기와 디아미드기 그리고 소수성의 긴 알킬사슬을 갖는 모든 반응생성물들은 얇은 막 크로마토그래피와 컬럼크로마토그래피로 분리ㆍ정제하였다. 합성 수율은 74~87%였으며 그들의 구조를 FT-IR, ¹H-NMR, 그리고 원소 분석으로 확인하였다.
형광구조를 갖는 올리고머형 음이온성 계면활성제의 합성 및 계면성
박선영(Seon Young Park),김상춘(Sang Chun Kim),정환경(Hwan Kyeong Jeong),남기대(Ki Dae Nam) 한국유화학회 2002 한국응용과학기술학회지 Vol.19 No.2
N/A Oligomer type anionic surfactants(RmM-Na or RmD-Na) were synthesized from C_8∼C_16 long chain alkylvinylether and maleic anhydride (or maleic diethylether). And also their fluorescent anionic surfactants (RmF-Na) were obtained from alkali neutralization which opens the lactone ring of the condensing materials produced by maleic anhydride alkylvinylether copolymer and 3-aminophenol. The measurement results for the surface active properties of water soluble oligomer type anionic surfactants with fluorescent structure (RmF-Na) exhibited a remarkable surface tension lowing property, foam breaking property, and a emulsing power.
형광성 구조를 갖는 올리고머형 음이온성 계면활성제 수용액에서 친수성 안료의 분산 안정성
박선영(Seon Young Park),정환경(Hwan Kyeng Jeong),김명수(Myung Soo Kim),김상춘(Sang Chun Kim),남기대(Ki Dae Nam) 한국공업화학회 2002 공업화학 Vol.13 No.4
올리고머형 음이온성 계면활성제(RmM-Na)를 탄화수소의 탄소수가 8∼16 범위인 장쇄 알킬비닐에테르와 무수말레인산의 공중합반응으로 합성하였고, 그의 형광성 음이온성 계면활성제(RmF-Na)는 공중합물인 maleic anhydride polyalkyl vinyl ether과 3-aminophenol를 알카리 매질하에 축합으로 락톤고리가 개열되면서 얻어졌다. 친수성 안료인 산화철(a-Fe_2O_3-A이나 a-Fe_2O_3-B)과 산화티탄(rutile이나 anatase) 등에 대한 분산성을 비교검토한 결과 알킬탄화수소의 탄소수가 12∼16 범위인 형광성 구조를 갖는 올리고모형 음이온성 계면활성제과 친수성 안료인 산화철인 경우 0.01∼0.1 wt% 농도범위에서 그리고 산화티탄인 경우는 0.05∼0.5 wt% 농도범위에서 우수한 분산성을 나타내었다. Oligomer type anionic surfactant (RmM-Na) was synthesized from C_8∼C_16 long chain of alkylvinylether and maleic anhydride (maleic diethylether). The fluorescent anionic surfactant (RmF-Na) was obtained from alkali neutralization, which opens the lactone ring of the condensing materials produced by maleic anhydride alkyl vinyl ether copolymer and 3-aminophenol. The dispersion characteristics were studied on hydrophilic pigments: ferric oxide (a-Fe_2O_3-A or a-Fe_2O_3-B) and titanium dioxide (rutile or anatase). The oligomer type surfactant that has a fluorescent structure with long alkyl chain length, C_12∼C_16, exerted large dispersing action for the hydrophilic pigments. The dispersion stability for ferric oxid was shown to be good in the range of 0.01∼0.1 wt%. It was shown that R_12F-Na was an excellent dispersion stabilizer for titanium dioxide in the concentration range of 0.05∼0.5 wt%.
형광성 구조를 갖는 올리고머형 음이온성 계면활성제 수용액에서 소수성 안료의 분산 안정성
정환경(Hwan Kyeng Jeong),박선영(Seon Young Park),김명수(Myung Soo Kim),남기대(Ki Dae Nam) 한국공업화학회 2002 공업화학 Vol.13 No.6
탄소수가 8∼16 범위인 장쇄 알킬비닐에테르와 무수 말레인산의 공중합반응으로 올리고머형 음이온성 계면활성제(RmF-Na)를 합성하고, 이의 형광성 음이온성 계면활성제(RmF-Na)를 공중합물인 maleic anhydride vinyl ether와 3-aminophenol를 알카리 매질하에 축합반응으로 락톤고리를 개열하면서 얻어졌다. 소수성 안료인 α-copper phthalocyanine, copper phthalocyanine green 및 carbon black 등에 대한 분산성을 비교 검토한 결과 탄소수가 8∼10범위의 장쇄 알킬기를 갖는 형광성 구조를 갖는 올리고머형 음이온성 계면활성제가 0.1∼1.0 wt% 농도 범위에서 phthalocyanine과 carbon black의 분산성을 가져왔다. Anhydride and its fluorescent anionic surfactants(RmF-Na) were obtained from alkali neutralization which opens the lactone ring of the condensing materials produced by maleic anhydride alkylvinylether copolymer and 3-aminophenol. Their dispersion abilities were studied on hydrophobic pigments such as α-copper phthalocyanine, copper phthalocyanine green, and carbon black. Moderate oligomer type anionic surfactants(RmM-Na) were synthesized from C_8∼C_16 long chain alkylvinylether and maleic a lengths C_8∼C_10 of long chain alkyl group in the structure of oligomer type anionic surfactant having fluorescent structure played an important role in the dispersion stability of the phthalocyanine and carbon black pigments within the concentration range of about 0.1∼1.0 wt%.