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제114회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Organic monolith frits encased in PEEK tubing with improved durability in HPLC

2014년 8월 28일 15시 43분 33초
ANAL.P-564 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
10월 15일 (수요일) 16:00~19:00
저자 및
박신영, 정원조*
인하대학교 화학과, Korea
Polymer-encased organic monolith frits were prepared as cheap frits before in our laboratory by forming organic monolith in common polymer tubing followed by cutting into slices. But previous tubing frits had critical weak point in that the monolith core was too easily detached from tubing. This study introduces a new technique which provides strong attachment of monolith to tubing inner surface. Inner surface of PEEK (Poly-ether-ether-ketone) tubing is pretreated with sulfuric acid in the presence of catalysts (vanadium oxide and sodium sulfate). After washing with water and acetone, the PEEK tubing was treated with glycidyl methacrylate (GMA). After washing, the reaction mixture of monolith (lauryl methacryltate (LMA), ethylene glycol dimethacrylate(EDMA), initiator, and porogenic solvent) was filled in the tubing and subjected to in-situ polymerization. The catalysts assisted pretreatment procedure was better in terms of monolith-tubing attachment in comparison to the pretreatment without catalysts. After slicing the tubing into many slices of frits, vortex test was carried out in order to check the durability of the frits. The frit slices were placed in a vial and an extreme shock was applied on the vial by vortex for various times. The frits made in presence of catalysts were found to be more durable. Furthermore, when the monolith-tubing was used as a chromatography column, the column prepared in the presence of catalysts resulted in better separation efficiency. In summary, catalyst-assisted sulfonation and introduction of double bonds there-on have been found useful for preparation of cheap PEEK encased monolith frits.