• Membrane Journal
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• v.16 no.4
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• pp.303-312
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• 2006

The asymmetric hybrid membranes of polyethersulfone (PES) and $ZrO_2$ nanoparticles were prepared via new one-step procedure combining simultaneously the phase-inversion method and the sol-gel technique. The optimum contents of $Zr(PrO)_4\;and\;HNO_3$ catalyst were determined by the adsorption experiments of phosphate anion onto the resulting hybrid membranes. The maximum adsorption of phosphate anion is obtained at the conditions of 0.15 mL $Zr(PrO)_4$ addition per 1 mL PES and 30 mL $HNO_3$ addition per 1 mL $Zr(PrO)_4$. Variation of morphology, performance and incorporated $ZrO_2$ amount of the resulting hybrid membranes were discussed and determined using SEM, pure water flux, TGA, ICP, XRD and contact angle measurements. Increasing $Zr(PrO)_4$ addition into casting solution, pure water flux is increased and $ZrO_2$ amount in the hybrid membrane is maximized at the conditions 0.15 mL $Zr(PrO)_4$ addition per 1 mL PES. The prephosphatation of PES-$ZrO_2$ hybrid membrane was studied to modify the surface characteristics of membrane. Ultrafiltration of bovine serum albumin (BSA) solution was performed in a dead-end cell using both a bare (non-phosphated) and a phosphated hybrid membrane. It is revealed that both the permeate flux and BSA rejection were increased as about 40% by prephosphatation of hybrid membrane. These results may be explained on the basis of the increase of membrane hydrophilicity, which was determined from contact angle measurements.

• Membrane Journal
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• v.28 no.6
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• pp.424-431
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• 2018

The gas separation performance of a mixed membrane structure based on a mixture of polyethersulfone (PES) and cobalt tetraphenylporphyrin-benzylimidazole (CoTpp-BIm) as an oxygen carrier was investigated. The CoTpp-BIm mixed PES membrane had an asymmetric structure with a mixture of finger structure and sponge-like structure, and the upper surface was dense. The gas separation performance test was carried out using $94%\;N_2$ gas and $6%\;O_2$ mixed gas. Oxygen and nitrogen permeability coefficients were measured at ${\Delta}P$ ranging from 15 to 228 cmHg and the permeate side of the PES membrane was maintained at vacuum level. The oxygen permeability coefficient of CoTpp-BIm mixed PES membranes increased as supplied pressure was decreased. When the supply pressure was 15 cmHg, the gas permeability ($P_{O_2}$) was 6676 Barrer, the $O_2/N_2$ selectivity (${\alpha}$) was 6.1, and the promoting factor (F) was 2.39. Based on these results, it was confirmed that the addition of CoTpp-BIm to the PES film improved the oxygen separation characteristics.

• Proceedings of the Membrane Society of Korea Conference
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• 1993.10a
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• pp.13-20
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• 1993

The sorption equilibria and permeation rates for carbon dioxide in such glassy polymer membranes with high glass-transition temperature as polyimide, polyetherimide, polysulfone and polyethersulfone membranes, were measured. The sorption isotherms for these systems can be described well by the dual-mode sorption model, whereas the pressure dependences of the mean permeability coefficients are simulated better by a modified dual-mode mobility model than the conventional dual-mode mobility model in which the Henry's law and Langmuir populations execute four kinds of diffusive movement.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.59 no.1
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• pp.113-115
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• 2010

In this study, ZnO films have been grown on PES(polyethersu]fone) substrate by PLD(pulsed laser deposition) and characterized as a change of laser density and substrate temperature. Growing conditions were changed with substrate temperatures ranging from 50 to $200^{\circ}C$ and laser densities ranging from $0.2\sim0.4 J/cm^2$. Optical and structural properties were measured by XRD, SEM, AFM, PL measurement.

• Proceedings of the KIEE Conference
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• 2009.07a
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• pp.1317_1318
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• 2009

본 논문에서는 폴리머 기판에서의 레이저 조사 밀도와 기판의 온도변화에 따라 성장하는 ZnO박막의 구조적 특성을 알아보기 위해 펄스레이저 증착법으로 polyethersulfone（PES)기판상에 ZnO 박막을 형성하였다. 레이저 조사 밀도는 0.2~0.4 J/$cm^2$까지 기판온도는 $50^{\circ}C{\sim}200^{\circ}C$까지 변화시켰고, 박막의 결정 구조적 특성을 XRD, AFM, SEM을 통해서 관찰하였다.

• Proceedings of the Korean Vacuum Society Conference
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• 2009.08a
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• pp.228-228
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• 2009

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2010.06a
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• pp.211-211
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• 2010

본 논문에서는 ZnO 박막을 휘어지기 쉬운 PES(polyethersulfone) 기판위에 PLD(pusled laser deposition)법을 사용하여 다양한 조건에서 성장시켰다. 성장된 ZnO 박막의 표면 형상과 광특성을 SEM과 PL을 사용하여 측정하였고, 레이저 밀도 0.3 J/$cm^2$, 기판 온도 $200^{\circ}C$에서 가장 좋은 광특성을 보였다.

• Proceedings of the Membrane Society of Korea Conference
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• 2002.11a
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• pp.84-87
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• 2002

No Abstract, See Full Text

• Proceedings of the Membrane Society of Korea Conference
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• 1994.10a
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• pp.58-60
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• 1994

막 모듈의 종류에는 평판형(Plate and Frarne), 나권형(Spiral Wound), 중공사형(Hollow Fiber), 관형(Tubular) 등이 있다. 이 중에서 관형 모듈은 공업적 스케일의 한외여과 장치로써 그 특징은 공급액 유로가 일반적으로 커서 전처리를 행하지 않고도 막히는 것이 적으며, 또한 막 표면의 세정이 약품에 의한 것 이외에 스폰지 볼 등에 의한 물리적 세정이 가능한 것이 있으므로 공업용이나 폐액처리 등에 적용할 수 있다는 것이다.

• Proceedings of the Membrane Society of Korea Conference
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• 2005.11a
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• pp.87-91
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• 2005