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Polycaprolactone 파우더를 이용한 새로운 salt leaching 세포 지지체의 세포배양 특성평가
송영국(Young-Gook Song),김범수(Beom-Su Kim),유형근(Hyung-Keun You),조영삼(Young-Sam Cho) 대한기계학회 2010 대한기계학회 춘추학술대회 Vol.2010 No.11
In this study, we characterized the cell-culturing ability of salt-leached scaffolds using thermoplastic polymer powder. This method does not need immense pressure to make a certain porous structure using salt leaching technique. For the fabrication, we prepared thermoplastic PCL powder with size of several hundred micrometers. After that, we mixed polymer powder and salt with 10, 20, 30 wt%, respectively. Subsequently we put together on hotplate to melt thermoplastic polymer. We cool down melting specimen and soaking it into D. I. water to leach salt powder. We measured the porosity of fabricated structures and measured the compressive effective stiffness using UTM. Moreover, we tested the compressive characteristics via UTM test machine. Moreover, we assessed the cell-culturing characteristics with MG63 cell line.
기공률 경사 구조를 갖는 세포지지체 제작을 위한 와이어 네트워크 몰딩 기법
허창민(Chang Min Heo),송영국(Young Koog Song),이세환(Se Hwan Lee),김태영(Tae Young Kim),이승재(Seung-Jae Lee),조영삼(Young-Sam Cho) 대한기계학회 2009 대한기계학회 춘추학술대회 Vol.2009 No.11
We modified “wire-network molding” technique to fabricate a scaffold with porosity-gradient structure for potential application in bone tissue engineering. Wire-network molding technique uses a mold coupled with several wires having network. Grinded PCL (polycaprolactone) could be filled in the mold and heated to melt down for reconfiguration. After that, we should separate wires from the mold and remove the mold from PCL. Afterward, the remained PCL has an interconnected porosity with a configuration of wire-network, that is, the required design for cell-culturing scaffold. In this study, we modified the position of wire coupled with the mold to get the scaffold with porosity-gradient structure.
이세환(Se Hwan Lee),김태영(Tae Young Kim),허창민(Chang Min Heo),송영국(Young Koog Song),이승재(Seung-Jae Lee),조영삼(Young-Sam Cho) 대한기계학회 2009 대한기계학회 춘추학술대회 Vol.2009 No.11
In this study, we developed a novel technique to fabricate cell-culturing scaffold, that is, the wire-network molding. Several wires having network configuration are coupled with a mold and grinded PCL (Polycaprolactone) could be filled in the mold. Subsequently, we put the mold filled with grinded PCL in vacuum oven to melt down PCL. After that, we should separate wires from the mold and remove the mold from PCL. Afterward, the remained PCL has an interconnected porosity with a configuration of wire-network, that is, the required design for cell-culturing scaffold. The final configuration of manufactured scaffold is almost same as that using SFF (Sold Freeform Fabrication) technique. However, the novel technique called as “wire-network molding” could be more effective in mass production than SFF technique, because the process time of novel technique does not depend on the size of scaffold in contrast to SFF technique