• Title/Summary/Keyword: emulsion-diffusion method

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Morphological Properties of Poly(ε-caprolactone) Nano/Microcapsules Prepared by Emulsion-diffusion Method (유화-확산법에 의해 제조된 폴리(ε-카프로락톤) 나노/마이크로캡슐의 형태적 특성)

  • Kim, Hea-In;Jeong, Cheon-Hee;Park, Soo-Min
    • Textile Coloration and Finishing
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    • v.22 no.3
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    • pp.229-238
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    • 2010
  • Poly($\varepsilon$-caprolactone) nano/microcapsules(nmcPCL) containing phytoncide oil were synthesized by emulsion diffusion method using ethyl acetate and poly(vinyl alcohol) (PVA) as an organic solvent and an emulsion stabilizer respectively. The influence of the degree of saponofication of the PVA and the weight ratio of core to wall materials was investigated to design nanocapsules in terms of particle size, morphology, and emulsion stability. The encapsulated nmcPCL were characterized by FT-IR spectrometry, particle size analyzer and scanning electron microscope. Mean size of nanocapsules prepared with PVA with a degree of saponofication of 87% was smaller than those of PVA with a degree of saponofication of 98.5% and the mean particle size of the capsules decreased with increasing core/shell ratio.

Preparation and Properties of Poly($\varepsilon$-caprolactone) Nanocapsules Containing Phytoncide Oil by Emulsion-diffusion Method(1) (유화확산법을 이용한 피톤치드오일 함유 폴리입실론카프로락톤 나노캡슐의 제조와 성질(1))

  • Jeong, Cheon-Hee;Kim, Hea-In;Park, Soo-Min
    • Proceedings of the Korean Society of Dyers and Finishers Conference
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    • 2008.04a
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    • pp.114-116
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    • 2008
  • Poly(${\varepsilon}$-caprolactone) nanocapsules(nanoPCL) containing phytoncide oil were synthesized by emulsion diffusion method using ethyl acetate as organic solvent. The influence of the degree of hydrolyzation of poly(vinyl acohol) used as an emulsion stabilizer, and the different weight ratio of core material to wall material on the particle size, morphology, and emulsion stability was investigated to design nanocapsules. The encapsulated nanoPCL were characterized by FT-IR spetrometry, Scanning electron microscope, Differential scanning calorimetry, and Thermogravimetry analysis, respectively.

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Preparation and Properties of Poly($\varepsilon$-caprolactone) Nanocapsules Containing Tricrecyl phosphate by Emulsion-diffusion Method (유화확산법을 이용한 트리크리실 포스페이트 폴리입실론카프로락톤 나노캡슐의 제조와 성질)

  • Jeong, Cheon-Hui;Park, Yun-Jeong;Kim, Hye-In;Park, Su-Min
    • Proceedings of the Korean Society of Dyers and Finishers Conference
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    • 2008.10a
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    • pp.69-70
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    • 2008
  • The study has attempted to prepare nanocapsules containing Tricrecyl phosphate by Emulsion-diffusion method. The study has focused on finding a optimum condition for preparering nano capsules and effect on size distribution and surface morphology.

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A Foundamental Study on the Solvent Dyeing Part 2. Dyeing Properties of PET Treated with Water, TCE and water/TCE Emulsion (용제염색에 관한 기초적 연구 제2보 물, TCE 및 물/TCE 처리를 한 PET의 염색성)

  • Chung Doo Jin
    • Journal of the Korean Society of Clothing and Textiles
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    • v.3 no.2
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    • pp.37-41
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    • 1979
  • In order to obtain tasic information for solvent dyeing, polyethylene terephthalate (PET) films was pretreated with water, tetrachloroethylene (TCE) and water/TCE emulsion for three hours at $140^{\circ}C$ for stabilizing the substrate. By film roll cyliderical method, Disperse Red 60, Disperse Yellow 42, and Disperse Blue 27 were diffused in the films and examined dyeing properties. The results are summarized as follows; 1) Diffusion coefficient increases in the order, waterTCE>water/TCE 2) A linear relationship between diffusion coefficient and shrinkage was Observed 3) The temperature dependence of the diffusion coefficient can't be expressed by WLF equation.

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Preparation of Nano-emulsion Containing Polygonum aviculare Extract for Enhanced Transdermal Delivery (피부 흡수 증진을 위한 마디풀 추출물 함유 나노에멀젼 제조에 관한 연구)

  • Lim, Myoung Sun;Park, Min A;Park, Soo Nam
    • Applied Chemistry for Engineering
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    • v.23 no.2
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    • pp.222-227
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    • 2012
  • In this study, nano-emulsion containing ethyl acetate fraction of Polygonum aviculare (P. aviculare) extract was prepared and skin permeability of the nano-emulsion was evaluated. Nano-emulsion was prepared using homogenizer and microfluidizer by the high-energy method. The droplet size and loading efficiency of nano-emulsion containing ethyl acetate fraction of P. aviculare extract were determined. The mean droplet size was 238 nm and the loading efficiency was more than 98%. The size distribution of nano-emulsion was a monodispersed form and nano-emulsion was more stable than that of using typical emulsion without using the microfluidizer. The in vitro skin permeation study of nano-emulsion containing ethyl acetate fraction of P. aviculare extract was carried out using Franz diffusion cells. Compared to 1,3-butylene glycol, nano-emulsion showed greater values of cumulative permeation of ethyl acetate fraction from P. aviculare extract. These results indicate that the stability and skin permeability of nano-emulsion containing ethyl acetate fraction of P. aviculare exerting anti-oxidative and anti-aging activities were enhanced.

A Foundamental Study on the Solvent Dyeing Part 1. Change of PET Substrate Treated with Water, TCE and Water/TCE Emulsion. (용제염색에 관한 기초적 연구 제일보 물, TCE 및 물/TCE 처리에 의한 PET 기질의 변화)

  • Chung Doo Jin
    • Journal of the Korean Society of Clothing and Textiles
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    • v.2 no.2
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    • pp.245-252
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    • 1978
  • In order to obtain some information for solvent dyeing, polyethylene terephthalate (PET) was treated with water, tetrachloroethylene yarn (TCE), and water/TCE emulsion for three hours at the temperatures from $40^{\circ}$ to $140^{\circ}C$. The change of fine structure of substratum by measuring the shrinkage, the degree of crystallinity, the stress relacxation modulus and Young's modulus. The P.E.T. film was also treated in water (at $140^{\circ}C$) for 4 hours to stabilize the substratum. By means of film roll cyliderical method, the Disperse Blue 27 was diffused. Then, calculated the diffusion coefficient and examined the application of WLF equation. However, the temperature dependence of the shrinkage could be explain with WLF equation, the diffusion coefficient couldn't be applied the WLF equation when the substratum was stabilized. From the result, the effects on shrinkage were in the order of water

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Influence of Coating Materials and Emulsifiers on Nanoparticles in Manufacturing Process (코팅물질과 유화제가 나노입자 제조 및 안정성에 미치는 영향)

  • Kim, Byeong-Cheol;Chun, Ji-Yeon;Park, Young-Mi;Hong, Geun-Pyo;Lee, Si-Kyong;Choi, Mi-Jung
    • Food Science of Animal Resources
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    • v.32 no.2
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    • pp.220-227
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    • 2012
  • The objective of this study was to investigate the influence of emulsion processing with various homogenization treatments on the physical properties of nanoparticles. For the manufacturing of nanoparticles, by taking the emulsion-diffusion method, various coating materials, such as gum arabic, hydroxyethyl starch, polycarprolactone, paraffin wax, ${\kappa}$-carrageenan and emulsifiers like Tween$^{(R)}$60, Tween$^{(R)}$80, monoglyceride and Pluronic$^{(R)}$F68, were added into the emulsion system. Furthermore, the various speeds (7,000 rpm to 10,000 rpm), and times (15 s to 60 s) of homogenization were treated during the emulsion- diffusion process. NEO II homomixer was the most effective homogenizer for making nanoparticles as 51 nm ($D_{10}$) and 26 nm ($D_{50}$). To manufacture smaller nanoparticles, by using NEO II homomixer, 10,000 rpm of agitation speed, polycaprolactone as coating material, and Pluronic$^{(R)}$F68 as an emulsifier were the optimum operating conditions and components. For the stability of nanoparticles for 7 days, $20^{\circ}C$ of storage temperature was appropriate to maintain the particle size. From these results, the type of homogenizer, homogenization speed, homogenization time and storage temperature could affect the particle size. Moreover, type of coating materials and emulsifier also influenced the size and stability of the nanoparticles.

Preparation and Characteristics of Poly(ε-caprolactone) Microcapsules Containing Pseudomonas by W/O/W Emulsion (다중에멀젼법을 통한 슈도모나스를 함유하는 PCL 마이크로캡슐의 제조 및 특성 연구)

  • Kim, Ki-Seok;Lee, Seung-Yeop;Lee, Gun-Woong;Kim, Hyung-Gon;Park, Soo-Jin
    • Polymer(Korea)
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    • v.36 no.2
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    • pp.202-207
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    • 2012
  • Biodegradable poly(${\varepsilon}$-caprolactone)(PCL) microcapsules containing pseudomonas were prepared by W/O/W emulsion system. The characteristics and release behaviors of the microcapsules were investigated as a function of manufacturing conditions. The morphology and particle distribution of the microcapsules were observed by a scanning electron microscope and a particle size analyzer. The release behaviors of the pseudomonas were determined using a cell culture method. It was found that smooth and spherical microcapsules were formed by W/O/W emulsion system and particle size was in the range of 10 to 60 ${\mu}m$. The release behaviors of the pseudomonas were influenced by the manufacturing conditions. It was indicated that the increase of the surfactant content and stirring rate led to an increased release rate, resulting from the high specific surface area of the smaller particle size, and the increase of the PCL content provided the sustained release behaviors by the delay effect of diffusion in the release medium.

Sorption and Leaching Characteristics of Diesel-Contaminated Soils Treated by Cold Mix Asphalt (Cold Mix Asphalt로 처리한 디젤 오염 토양의 흡착 및 용출특성)

  • Seo Jin-Kwon;Hwang Inseong;Park Joo-Yang
    • Journal of Soil and Groundwater Environment
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    • v.9 no.4
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    • pp.24-31
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    • 2004
  • A cold mix asphalt (CMA) treatment process was proposed as a tool to recycle soils contaminated with petroleum hydrocarbons. Experimental studies were conducted to characterize performances of the CMA process in treating soils contaminated with diesel or diesel compounds. From the screening experiments, it was found that performances of five types of asphalt emulsions that contained a cationic or an anionic or a nonionic surfactant were not substantially different. In consideration of higher affinity for soils and higher sorption coefficients obtained, an emulsion containing Lauryl Dimethyl Benzyl Ammonium Chloride (LDBAC) was selected as a promising asphalt emulsion for treating diesel-contaminated soils. When the asphalt emulsion LDBAC was applied to treat three compounds that originated from diesel, the removal efficiencies obtained in the order of decreasing efficiencies were as follows: docosane > pentadecane > undecane. Leaching experiments on the specimen formulated by the emulsion LDBAC found that the selected treatment method could treat soils with diesel concentrations as high as 10,000 mg/kg. Leaching of the diesel from the specimen was controlled by diffusion for the first four days and then leaching rate diminished substantially. The latter behavior was characterized as depletion, which represents that the contaminant released amounts to more than $50\%$ of the total amount of the contaminant that can be leached. The amounts of three diesel compounds leached from the specimen in the order of decreasing amount were undecane, pentadecane, and docosane. The curing of the soil contaminated with pentadecane was relatively slow.

Chitosan-Coated Fe3O4 Magnetic Nanoparticles as Carrier of Cisplatin for Drug Delivery

  • Arum, Yosefine;Oh, Yun-Ok;Kang, Hyun Wook;Ahn, Seok-Hwan;Oh, Junghwan
    • Fisheries and Aquatic Sciences
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    • v.18 no.1
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    • pp.89-98
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    • 2015
  • A synthesis method for a chitosan-coated magnetic drug-delivery system of cisplatin is proposed. Here, cisplatin was conjugated to the surface of Magnetite ($Fe_3O_4$) nanoparticles via a (3-Aminopropyl)-trimethoxysilane (APTS) coupling agent. To reduce the cytotoxic effect of cisplatin, the magnetic drug was then encapsulated in chitosan (CS-cisplatin-$Fe_3O_4$) through the water/oil (W/O) emulsion method. The CS-cisplatin-$Fe_3O_4$ nanoparticles were synthesized in a spherical shape with a diameter of 190 nm. The cytotoxicity assay was performed using HeLa cells. The cisplatin uptake of the cells was determined using High Performance Liquid Chromatography (HPLC) to calculate the drug content. The controlled release of cisplatin was demonstrated by regulating the dissolution and diffusion of the drug through the chitosan matrix.