• Journal of Pharmaceutical Investigation
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• 제28권3호
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• pp.159-164
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• 1998

The O/W and W/O emulsions containing Scutellariae Radix extract(SRE) which is very slightly soluble in oil phases and sparingly soluble in water phases, were prepared by homogenizing water and oil phases with emulsifier. The diameters of emulsion were ranged from 100 to $300\;{\mu}m$. The viscosity of W/O emulsion was higher than that of O/W emulsion. W/O emulsion was more stable than O/W emulsion which was gradually degraded when tested by centrifuge method and temperature tolerance method at $50^{\circ}C$. The antibacterial activity of two emulsions was not significantly different from that of aqueous solution of SRE, and showed similar MIC and bacterial growth inhibition rate.

• 한국응용과학기술학회지
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• 제24권2호
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• pp.190-195
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• 2007

The transesterifications of beef tallow and the mixture of beef tallow and rapeseed oil were conducted at $65^{\circ}C$ respectively using TMAH, NaOH and their mixed catalysts. The reactants were emulsified with 1vol% emulsifier and propylene glycol. The overall conversion of beef tallow was 95% at such optimum conditions as the 1:8 of molar ratio and 0.8 wt% TMAH. The overall conversion of mixed fat at the 1:8 of molar ratio and mixed catalyst of 70 wt% TMAH 30 wt% NaOH was close to 97% which appeared at 0.8 wt% TMAH in 80min. And the kinematic viscosity of biodiesel mixture using the mixed catalyst was $6.5mm^2/s$ at $40^{\circ}C$.

• 한국막학회:학술대회논문집
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• 한국막학회 1995년도 제3회 심포지움 (분리막 연구의 최신동향)
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• pp.39-55
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• 1995

Modified polycrylonitrile(PAN) membranes were prepared by emulsion or emulsifier-free emulsion polymerization technique. Separation capacity was determined at several operating temperatures(25, 40, 55 and 70 $^{\circ}$C) to dehydrate 56wt% pyridine aqueous solution through modified PAN membranes having different functional groups. All these PAN-based membranes were selective toward water to different degrees depending on the nature of functional groups present in the membranes. Pervaporation characteristics of PAN-based membranes are so different and classified into three categories depending on the type of the functional groups in PAN copolymers. Among PAN-based membranes, the in-situ complex membranes show the best separation capacity over the operating temperatures.

• 식품산업과 영양
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• 제8권2호
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• pp.51-55
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• 2003

송이 향을 오랫동안 유지하기 위한 기초자료를 얻을 목적으로 일반적으로 많이 이용되는 감자전분을 matrix로 사용하여 송이 향의 주성분인 1-octen-3-ol을 미세캡슐화 하는 조건을 조사한 결과는 다음과 같다. 전분농도5.5% 이하 용액의 점도는 $60^{\circ}C$에서 420 cP이하를 나타내었고 6.0% 이상의 용액은 820cP 이상을 나타내어 이 농도를 경계하여 점도의 변화가 뚜렷하게 구별되었다. 균질화하기 전과 후의 감자전분용액의 점도변화에서는 감자전분에 emulsifier와 1-octen-3ol을 첨가하여 균질화한 에멀젼 용액의 점도가 균질화하기 전 용액의 점도보다1/2 이하 값을 나타내어 균질화 공정이 용액의 점도를 낮추었다. 감자전분용액의 농도가 높을수록 1-octen-3-ol의 잔존량이 많았다.

• 한국식품조리과학회지
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• 제18권3호
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• pp.333-339
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• 2002

This study was conducted to examine the effect of emulsifiers on the quality characteristics of Yackwa. Lecithin and various sucrose fatty acid esters (S-570, S-970, S-1570) were used as emulsifiers. The addition of emulsifiers to Yackwa decreased the hardness, cohesiveness, springiness and gumminess, but increased the brittleness. This tendency was most distinct by the addition of S-970. All sensory characteristics of Yackwa such as color, smooth surface, smell, internal layer formation, softness and overall quality, were improved greatly by the addition of emulsifiers. As a result, the mechanical and sensory characteristics of Yackwa were improved by the addition of the emulsifiers, and sucrose fatty acid esters showed better results than lecithin.

• 한국염색가공학회:학술대회논문집
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• 한국염색가공학회 2008년도 제39차 학술발표회
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• pp.41-42
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• 2008

Chitosan microcapsules were prepared by microreactor method and conventional batch method using glutaraldehyde as a cross-linking agent and L-a-phosphatidylcholine as an emulsifier. The mean particle sizes of microcapsules prepared by microreactor and batch method were 1.10 and 1.96 mm, respectively. The former microcapsules showed narrower size distribution than those of the latter one.

• 한국환경과학회지
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• 제23권1호
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• pp.105-112
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• 2014

With the incorporation of hydrogen peroxide($H_2O_2$) and NaLS as an initiator and emulsifier, acrylic acid monomer was graft copolymerized with sodium alginate prepared from alginic acid, and then the grafted copolymer was confirmed through IR spectrometer. When the amounts of acrylic acid increased the grafting also showed increasing trend. While the contents of hydrogen peroxide was varied in the aqueous sodium alginate solution, the grafting efficiency decreased gradually as the amounts of initiator increased.

• 한국응용과학기술학회지
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• 제20권1호
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• pp.27-32
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• 2003

The core-shell latex particles were prepared by sequential emulsion polymerization of alkyl methacrylate and styrene(ST) by using an water-soluble initiator(APS) after preparing monomer pre-emulsion in the presence of an anionic surfactant(SDBS). In organic/organic core-shell polymerization, the pre-emulsion method, which minimized required quantity of sulfactant, has been used to increase the conversion rate and the stability of core-shell latex particles as well as to reduce the formation of secondary particle that cause problems of soap-free emulsion during shell polymerization. We used several methods to observe the core-shell structure. The core-shell structure was studied by measuring pH change during hydrolysis by NaOH, glass transition temperature($T_g$) by differential scanning calorimeter(DSC), morphology of latex by transmission electron microscope(TEM) and change of particle size and distribution by a particle analyzer.

• 한국응용과학기술학회지
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• 제25권3호
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• pp.275-281
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• 2008

The esterification of free fatty acid in Jatropha oil added by propylene glycol using p-TSA catalyst was done, and then the transesterification of Jatropha oil added by 1.0vol% GMS as an emulsifier using TMAH, and mixed catalyst(60wt%-TMAH+ 40wt%-KOH) respectively was followed at $60^{\circ}C$. The esterification conversion at the 1:8 molar ratio of free fatty acid to methanol using 8.0wt% p-TSA was 94.7% within 60min. The overall conversion at the 1:8 molar ratio of Jatropha oil to methanol and $60^{\circ}C$ using mixed catalyst was 95.4%. The kinematic viscosity of Biodiesel using TMAH and mixed catalyst in 24h met the ASTM D-6751 above $30^{\circ}C$, and showed a little more than its criterion.

• 공업화학
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• 제3권4호
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• pp.670-677
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• 1992

2, 3-Dibromopropyl alcohol과 chlorophenyl phosphate로 부터 (2, 3-dibromopropyl)phenyl phosphate[DPP]를 합성하고, 또한 DPP에 n-octadecyl chloride를 가하여 (2,3-dibromopropyl)phenyl octadecyl phosphate[DPOP]를 합성하였다. DPP와 DPOP에 각각 유화제를 블렌딩시켜 난연제 DPPF와 DPOPF를 제조하였는데, 모두 o/w(oil in water)유화형 난연제였다. 이 2종류의 난연제를 각종 합성직물에 처리하여 난연성과 인열강도를 측정한 결과 DPPF는 난연성만이, 그리고 DPOPF는 난연성과 유연성 모두 양호하였다.