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- W2334504001 abstract "졸-젤법을 이용한 전기방사법과 캐스팅법으로 폴리(<TEX>${varepsilon}$</TEX>-카프로락톤)(PCL) 나노섬유와 PCL/실리카 막을 각각 제조하였다. 용매에 N,N-dimethylformamide(DMF)를 혼합한 경우 부드럽고 연속적인 PCL 나노섬유가 제조되었다. PCL 기지상에 tetraethyl orthosilicate(TEOS) 농도가 0에서 40 vol%로 증가함에 따라 PCL/silica의 강도는 12에서 8MPa로 감소하였지만, 7주까지 phosphate buffered saline solution(PBS) 침지에 따른 강도값의 변화는 없었다. 실리카 첨가에 따른 인장강도의 감소는 기공도의 증가에 기인하였다. PCL/실리카 막의 결정구조는 사방정계로 실리카 농도가 0에서 40 vol%로 증가함에 따라 crystallite 크기는 57에서 18 nm로 감소하였다. 세포독성 실험결과, PCL/실리카는 시편의 수축 및 변형이 없고, 검체 주위에서 변색이나 L-929 세포의 이상이 관찰되지 않는 무독성이었다. Poly(<TEX>${varepsilon}$</TEX>-caprolactone) (PCL) nanofibers and PCL/silica membranes were synthesized by sol-gel derived electrospinning and casting, respectively. Smooth PCL nanofibers were obtained from the precursor containing N,N-dimethylformamide (DMF). PCL/silica membranes were prepared by varying the tetraethyl orthosilicate (TEOS) contents from 0 to 40 vol% to investigate the effect of silica addition on mechanical properties and cytotoxicity of the membranes. Although the strength of the membranes decreased from 12 to 8 MPa with increasing the silica content, the strength remained almost constant 7 weeks after dipping in phosphate buffered saline solution (PBS). The strength reduction was attributed to the presence of a patterned surface pores and micro-pores present in the walls between pores. The crystal structure of the membranes was orthorhombic and the crystallite size decreased from 57 to 18 nm with increasing the silica content. From the agar overlay test, the PCL/silica membranes exhibited neither deformation and discoloration nor lysis of L-929 fibroblast cells." @default.
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- W2334504001 date "2015-03-25" @default.
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- W2334504001 title "Synthesis and Characterization of Porous Poly(ε-caprolactone)/Silica Nanocomposites" @default.
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