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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/24037

Title: Wear Resistance of Porous High Pressure Crystallized UHMWPEs as Artificial Cartilage Biomaterials
Authors: Chou C. C.;Wang Y. C.
Contributors: NTOU:Department of Mechanical and Mechatronic Engineering
Keywords: biotribology;biomimetics;cartilage;UHMWPE;wear
Date: 2010-12
Issue Date: 2011-10-20T08:09:38Z
Publisher: the International Tribology ASIATRIB Congress (ASIATRIB 2010)
Abstract: Porous ultra high molecular weight polyethylenes (UHMWPEs) were prepared by molding a UHMWPE-based powder, which was mixed with NaCl particles, through a high pressure crystallization (HPC) process. Vitamin E (-tocopherol) was further incorporated into the porous material before the HPC process to obtain a higher degree of crystallinity. A solid UHMWPE without blending Vitamin E during HPC was also made as a benchmark. Differential scanning calorimetry was used to detect samples’ crystallinity and oxidative stability. Infrared Spectra of the original and aged specimens were studied to compare their long-term oxidation behaviors. The surface morphology and the porosity of the freeze-fractured cross section were observed by a scanning electron microscope. The tribological properties, including wear rate and friction coefficient, of the UHMWPEs were investigated by implementing a pin-on-disk tester under the lubrication of a normal saline. The wear debris were collected and their dimensions were statistically analyzed to survey the possibility of biological response (osteolysis). The material properties of the porous UHMWPE containing vitamin E as a plasticizing agent and an antioxidant as well were discussed. The synergetic tribological performance of the mentioned material properties and the biomimetic porous structure under lubrication was addressed and concluded.
Relation: ID1286
URI: http://ntour.ntou.edu.tw/handle/987654321/24037
Appears in Collections:[機械與機電工程學系] 期刊論文

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