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약학박사 정 시련 교수 정년퇴임 기념호 : 연구논문(재록) ; 생명과학 : 동결-해동에 의해 제조된 신디오탁틱폴플리비닐알코올 하이드로젤에서 소 혈청 알부민의 유리 특성
류원석 ( Won Seok Lyoo ),신동수 ( Dong Soo Shin ),한성수 ( Sung Soo Han ),노석균 ( Seok Kyun Noh ),김정애 ( Jung Ae Kim ),최한곤 ( Han Gon Choi ),용철순 ( Chul Soon Yong ),김재룡 ( Jae Ryong Kim ),김정희 ( Jung Hye Kim ) 영남대학교 약품개발연구소 2006 영남대학교 약품개발연구소 연구업적집 Vol.16 No.-
Performance Assessment of PVA Geotextile/HDPE Geomembrane Composites
전한용,홍상진,류원석,Jeon, Han-Yong,Hong, Sang-Jin,Lyoo, Won-Seok Korean Geosynthetics Society 2005 한국지반신소재학회 논문집 Vol.4 No.1
폐기물 매립지 관련 특성을 조사하기 위하여 PVA 지오텍스타일/HDPE 지오멤브레인 복합재료를 제조하였다. PVA 지오텍스타일의 인장특성, 인열 및 파열강도, 유효구멍크기와 투수성 등을 각각 측정하였다. 또한 침출수에 대한 화학저항성과 자외선 안정성도 측정하였으며, 하중조건에 따른 크리프 변형거동과 마찰특성도 측정하였다. 이들 결과로부터 PVA 지오텍스타일/HDPE 지오멤브레인 복합재료는 일반적으로 폐기물 매립지에 적용되는 폴리프로필렌이나 폴리에스테르 지오텍스타일에 비해 우수한 특성을 나타내었다. 끝으로, 감소인자 분석으로부터 PVA 지오텍스타일/HDPE 지오멤브레인 복합재료의 크리프 변형거동도 폴리프로필렌이나 폴리에스테르 지오텍스타일에 비해 안정함을 알 수 있었다. PVA geotextile/HDPE geomembrane composites were made to examine the waste landfill related properties. Tensile properties, tear and bursting strengths, AOS(apparent opening size) and permittivity of PVA geotextiles were evaluated, respectively. Ultraviolet stability and chemical resistance to the leachate was evaluated also. Friction property and creep deformation were tested at various loading condition. From this, it was seen that PVA geotextile/HDPE geomembrane composites have more excellent properties than the typically used polypropylene and polyester geotextiles in waste landfill. Finally, creep deformation behaviours of PVA geotextile/HDPE geomembrane composites were more stable than polypropylene and polyester geotextiles through the reduction factor analysis.
여정섭,김기정,류원석,오영세,김준호,Yeo, Jeong-Sup,Kim, Ki-Jeong,Lyoo, Won-Seok,Oh, Young-Se,Kim, Joon-Ho 한국섬유공학회 2007 한국섬유공학회지 Vol.44 No.5
The gelation behaviors of high molecular weight poly(vinyl alcohol)(PVA) solutions were investigated by the measurements of the rate of phase separation and the rate of gelation. PVA solutions were prepared with dimethyl sulfoxide(DMSO)/water mixed solvents in various compositions. Gelation time was gradually shortened with increasing DMSO content in the mixed solvent up to 60%(vol.). Also, the gelation was faster for higher molecular weight PVA due to easier network formation with higher degree of polymerization. Gels of PVA solutions formed at $0^{\circ}C$ showed high transparency with the exception of DMSO/water(v/v)=0/100, 90/10, 100/0 solutions. Particularly, the gel formed in the mixed solvent of DMSO/water(v/v)=80/20 still maintained its transparency after 20,000 min. This means that the most stable PVA gel can be made with the mixed solvent of DMSO/water(v/v)=80/20.
Swelling Behavior Evaluation of Bentonite with Additives Mixture
김초롱,김주희,류원석,주창환,전한용,Kim, Cho-Rong,Kim, Joo-Hee,Lyoo, Won-Seok,Joo, Chang-Whan,Jeon, Han-Yong The Korean Fiber Society 2009 한국섬유공학회지 Vol.46 No.6
Variation of free swell index of powder and granular bentonite in distilled water were reviewed. For this, four types of additives is used such as starch (SC), sodium carboxy-methyl cellulose (SCMC), polyvinyl alcohol (PVA-Iand PVA-II), super absorbent polymer (SAP). For PVA-I and PVA-II, free swell index increased with 0.2 g addition. However, SC showed a little increase and SCMC showed higher increase. Especially for SAP addition, powder bentonite has larger free swell index to compare with granular bentonite. The sequence of contribution to free swell index of bentonite in descending order is SAP, SCMC, PVA-II, PVA-I, and SC.
자외선 조사에 의해 표면개질된 셀룰로스 아세테이트 직물의 염색성
이해성,손원석,유재형,류원석,장진호,Lee, Hae-Sung,Son, Won-Suk,Yu, Jae-Hyun,Lyoo, Won-Seok,Jang, Jin-Ho 한국섬유공학회 2006 한국섬유공학회지 Vol.43 No.4
Hydrophobic surfaces of cellulose acetate(CA) fabrics were modified to give more hydrophilicity via $UV/O_3$ irradiation. The surface change of chemical structure and composition were investigated by ATR and ESCA analysis. The UV irradiation treatment caused ester linkage of the acetyl groups to break down and new photo-oxidated products were generated as indicated in subtracted ATR spectra and $O_{1s}/C_{1s}$. Also degree of acetylation of the irradiated CA fabrics decreased with increasing UV energy. It was found that the dyeability of the modified acetate remarkably improved particularly toward cationic and reactive dyes, while disperse dyeability of the modified fabrics decreased noticeably at the irradiated surface. Effect of change in various dyeing conditions including dye concentration, dyeing time and temperature on cationic dyeing were assessed to find optimal dyeing condition. The colorfastness of the acetate fabrics to laundering and rubbing was good enough in spite of surface coloration of the acetate fabrics inevitable in the UV treatment and subsequent dyeing.