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    題名: Preparation of Clay/PMMA Nanocomposites with Intercalated or Exfoliated Structure for Bone Cement Synthesis
    作者: Hwang, Kuo-jen;Lin, Dar-jong;Cheng, Liao-ping
    貢獻者: 淡江大學化學工程與材料工程學系
    關鍵詞: bone cement;cell culture;clay;intercalation;nanocomposites
    日期: 2006-06-07
    上傳時間: 2011-10-24 00:57:02 (UTC+8)
    摘要: Clay/PMMA nanocomposites were prepared by melt blending of an organically modified MMT with PMMA under various process conditions. The MMT clay was initially cation exchanged with octadecylammonium to enhance its hydrophobicity and to expand the interlamellar space of the silicate plates. PMMA was then inserted into the inter-lamellar space of the modified clay by melt blending at an elevated temperature. The effects of blending temperature, blending time, and clay/PMMA compositions on the level of expansion and homogenization were investigated. Composites with intercalated and/or exfoliated clay structure were obtained depending upon the process conditions, as confirmed by XRD diffractometry. The thermal decomposition temperature (Td) and glass transition temperature (Tg) of the composites were determined, respectively, by TGA and DSC analyses. Marked improvements, up to 35 °C, of the thermal stability (Td) with respect to pure PMMA were achieved for many of the composite samples. The Tg of the composites, however, does not increase accordingly. Furthermore, a novel type of bone cement was synthesized by applying the clay/PMMA nanocomposites as a substitute for PMMA in a typical formulation. These bone cements demonstrated much higher impact strength and better cell compatibility than the surgical Simplex P cement. Therefore, the bone cements with clay/PMMA nanocomposites meet the requirement for the architectural design of orthopedic surgery.
    關聯: Macromolecular Materials Engineering 291, p.661-669
    DOI: 10.1002/mame.200500389
    顯示於類別:[化學工程與材料工程學系暨研究所] 期刊論文

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