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RISS 인기검색어
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- 저자 : 윤연흠 ( Yeon-hum Yoon ) (검색결과 4 건)
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키토산 기반 분자 각인 고분자 필름의 슐린닥 흡착 및 방출 특성
윤연흠 ( Yeon-hum Yoon ),윤순도 ( Soon-do Yoon ),나재운 ( Jae Woon Nah ),심왕근 ( Wang Geun Shim ) 한국공업화학회 2019 공업화학 Vol.30 No.2
분자인식기술은 특정 분자를 고분자 매트릭스에 각인시켜 특정 분자의 선택성을 높이는 기술로 관심을 받아왔다. 이 연구에서는 Sulindac (SLD)을 각인시킨 키토산 기반 약물 전달용 필름의 흡착 및 방출 특성을 가소제, 온도, pH를 변화시켜 실험하고 그 결과를 관련 모델식으로 해석하였다. SLD 각인 고분자 필름의 약물 흡착은 Freundlich와 Sips식이 Langmuir식보다 더 잘 설명되었고 binding site 에너지 분포 함수는 SLD와 고분자 필름 간의 흡착 특성관계를 이해하는데 유용하였다. 그리고 SLD 각인 고분자 필름의 약물 방출은 Fickian 확산 거동을 보인 반면, 인공피부조건에서는 non-Fickian 확산 거동을 따랐다. Molecular recognition technology has attracted considerable attention for improving the selectivity of a specific molecule by imprinting it on a polymer matrix. In this study, adsorption and release characteristics of chitosan based drug delivery films imprinted with sulindac (SLD) were investigated in terms of the plasticizer, temperature and pH and the results were also interpreted by the related mathematical models. The adsorption characteristics of target molecules on SLD-imprinted polymer films were better explained by the Freundlich and Sips equation than that of the Langmuir equation. The binding site energy distribution function was also useful for understanding the adsorption relationship between target molecules and polymer films. The drug release of SLD-imprinted polymer films followed the Fickian diffusion mechanism, whereas the drug release using artificial skin followed the non-Fickian diffusion behavior.
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Starch와 PVA를 이용한 생분해성 필름의 제조와 물리적 특성
윤연흠 ( Yeon Hum Yun ),윤순도 ( Soon Do Yoon ) 조선대학교 공학기술연구원 2008 공학기술논문지 Vol.1 No.1
We report on the preparation and physical properties of films using corn starch and poly(vinyl alcohol) (PVA). Starch/PVA biodegradable films were synthesized with a mixing process and casting method. Glycerol (GL), sorbitol (SO), malic acid (MA), tartaric acid (TA) and citric acid (CA) were used as additives. Gelatin (GE) was used as filler for increasing of physical properties of starch/PVA biodegradable films. The additives and the influence of filler in films on the physical properties of the films were investigated. The mechanical properties, tensile strength (TS), elongation al break (% E), degree of swelling (DS), and solubility (S) of starch/PVA blend film were examined adding GL, SO, MA, TA and CA as additives and GE as filler. The results of the measurements indicated that the GE-added films were better than the other films.
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PMMA 나노 입자를 이용한 생분해성 필름 제조 및 물리적 특성
윤순도 ( Soon Do Yoon ),강웅일 ( Ung Il Kang ),윤연흠 ( Yeon Hum Yun ) 조선대학교 공학기술연구원 2009 공학기술논문지 Vol.2 No.4
In this study, biodegradable films are prepared by using com starch, polyvinyl alcohol (PVA), nanosized polymer particles (polymethyl methacrylate (PMMA)), and additives. Glycerol (GL), xylitol (XL) tartaric acid (TA), and citric acid (CA) were used as additives. Nano-sized PMMA particles synthesized by the method of emulsion polymerization. The morphology and the physical properties such as tensile strength (TS), elongation (%E), degree of swelling (DS), and solubility (S) of biodegradable films were investigated. The results verified that with the increase in PMMA contents, the TS and DS values of films were increased, whereas %E and S values were decreased. Also, the biodegradation of films was carried out using the soil burial test.
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친환경 생분해성 PLA/PBAT/HCO 블랜드 필름 제조 및 물리적 특성
이승민 ( Seung-min Lee ),김한성 ( Han-seong Kim ),윤연흠 ( Yeon-hum Yun ),형태경 ( Tae-gyung Hyung ),윤순도 ( Soon-do Yoon ) 한국공업화학회 2020 공업화학 Vol.31 No.4
본 연구에서는 생분해성 고분자인 poly(latic acid) (PLA), poly(butylene adipate-co-terephthalate) (PBAT)와 첨가제로 hydrogenated castor oil (HCO) powder를 이용하여 친환경 생분해성 소재를 제조하였다. 제조한 PLA/PBAT/HCO 블렌드 필름의 특성은 scanning electron microscope (SEM)와 fourier-transform infrared spectroscopy (FT-IR)를 이용하여 분석하였다. SEM 분석 결과 HCO가 첨가된 PLA/PBAT (8 : 2) 블렌드 필름은 12-hydroxy stearic acid (12HSA)와 cellulose가 첨가된 필름과 비교했을 때, 안정적인 표면을 나타내었다. FT-IR 결과는 PLA/PBAT 블렌드 필름에서 HCO의 특성 피크의 나타냈으며, HCO 함량이 0에서 0.2 wt%까지 증가함에 따라 intensity가 증가함을 알 수 있었다. 또한, 제조한 PLA/PBAT/HCO 블렌드 필름의 물리적 특성, 열 분석을 수행하였다. 그 결과 HCO 첨가에 의해 물리적 특성과 열 안정성이 3배 이상 향상되었음을 확인하였다. 제조한 생분해성 소재의 토양에서 생분해 정도는 90 days 동안 6~20% 분해됨을 확인하였다. In this study, eco-friendly biodegradable materials were prepared using poly(lactic acid) (PLA), poly(butylene adipate-co-terephthalate) (PBAT), and hydrogenated castor oil power (HCO) as an additive. The prepared PLA/PBAT/HCO blended films were characterized by the scanning electron microscope (SEM) and fourier-transform infrared spectroscopy (FT-IR). The results of SEM analysis indicated that PLA/PBAT (8 : 2) blended films added HCO showed no rough area, crack, or large agglomeration when compared with those adding various additives (12-hydroxy stearic acid (12HSA) and cellulose). The FT-IR results indicated the presence of specific peak of HCO in the PLA/PBAT blended films, and its peak intensity increased with increasing HCO content (0~5.0 wt%). Tensile strength, elongation at break, and water barrier and thermal properties of the prepared PLA/PBAT/HCO blended films were also investigated, indicating that the physical and thermal properties was improved more than three times by the addition of HCO. The biodegradability test in soil revealed that the prepared biodegradable materials were degraded by about 6.0~20% after 90 days.
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