中文摘要 本研究是以溶液分散法 (Solution Dispersion) 直接將商業用PMMA與經過改質的層狀材料進行混摻,製備成聚甲基丙烯酸甲酯/雲母/黏土奈米複合材料。在天然層狀材料改質的部分,使用Diallyl Dimethyl Ammonium Chloride(四級銨鹽)作為改質劑進行親油性改質,以改善雲母(Mica)/黏土(Clay)與高分子之間的相容性。 在本研究中,將探討不同視徑比(Aspect ratio)之雲母(Mica)與黏土(Clay)製備之奈米複合材料其化學結構與阻隔特性上的表現,並探討其對於水氣、氣體阻隔性質與材料熱穩定性之影響,並利用不同比例之聚甲基丙烯酸甲酯/雲母或聚甲基丙烯酸甲酯/黏土奈米複合材料塗佈於金屬鐵片上,研究其防腐蝕效應之變化。利用廣角X-ray繞射儀與穿透式電子顯微鏡(TEM)觀察層狀材料層間距離的變化及高分子基材中之分散情形。 研究結果顯示,親油化處理之雲母奈米複合材料在各方面特性上明顯優於未改質之天然雲母,且具高視徑比之改質型親油性雲母奈米複合材料(PMMA/Mica)之抗腐蝕性、阻隔特性、熱性質與機械性質等均有較優異的表現。
abstract A series of polymer/mica nanocomposite material consisted of polymethyl methacrylate (PMMA), and improved layered material (Mica/Clay) was prepared with Solution Dispersion. The Diallyl Dimethyl Ammoniun Chloride was used to modify the organophilic of natural layered materials for improving the compatibility between mica/clay and PMMA. The variation in layered material and dispersion in PMMA matrix would be observed with wide-angle X-ray diffraction(WAXRD) and transmission electron microscopy (TEM). The effects of material composition with different Aspect ratio of mica and clay on O2 / N2 gas molecular permeability(GPA), H2O molecular permeability(VPA) and thermal stability. The corrosion protection would be studied according to coating on cold-rolled steel (CRS) with different ratios of PMMA/mica and PMMA/clay. The PMMA/mica nanocomposite was excelled the natural layered materials in generality characteristics. There were also excellent performance in anticorrosive and resistance of PMMA/Mica nanocomposite material with high aspect ratio.