聚鄰-胺基苯乙基醚∕黏土之奈米複合材料 之製備與性質研究

Preparation and Properties of Poly(o-ethoxyaniline)/Clay Nanocomposite Materials

陳啟倫(Chi-Lun Chen)

指導教授 ： 葉瑞銘

中原大學/理學院/化學研究所/碩士(2001年)

https://doi.org/10.6840/cycu200100357

摘要

Poly(o-ethoxyaniline) (PEA)∕黏土（Clay）的有機∕無機奈米複合材料的合成是由有機鄰-胺基苯乙基醚（o-Phenetidine）單體和無機層狀之蒙脫土（MMT），以化學氧化法藉由過硫酸銨（Ammonium Peroxodisulfate）當氧化劑，來行氧化聚合。 我們用的蒙脫土是屬於鈉型蒙脫土，為了讓蒙脫土能與我們的有機PEA混成，必須先用Tetradecyltrimethyl ammonium當改質劑，將鈉型蒙脫土改質為親油性蒙脫土。 在本研究中，將探討添加不同比例的PEA和親油性蒙脫土的奈米複合材料其熱性質與化學結構，並利用不同比例的PEA/Clay奈米複合材料塗佈在金屬上，研究其防腐蝕效果，並同時觀察其物性、化性的變化。 研究結果顯示，當增加親油性蒙脫土添加的比例時，此奈米複合材的耐熱性有明顯的提升，且抗腐蝕性、阻氣性也相對地提升。

關鍵字

聚鄰胺基苯乙基醚 ； 黏土 ； 奈米複合材料

並列摘要

A series of nanocomposite materials that consisted of emeraldine base of poly(o-ethoxyaniline) (PEA) and layered montmorillonite (MMT) clay were prepared by effectively dispersing the inorganic nanolayers of MMT clay in organic poly(o-ethoxyaniline) matrix via in-situ polymerization. Organic o-Phenetidine monomers were first intercalated into the interlayer regions of organophilic clay hosts and followed by an one-step oxidative polymerization. The as-synthesized poly(o-ethoxyaniline)-clay lamellar nanocomposite materials were characterized by infrared spectroscopy, wide-angle power X-ray diffraction, and transmission electron microscopy. Poly(o-ethoxyaniline)/clay nanocomposites (PCN) in the form of coating with low clay loading (e.g., 0.5 wt-%) on cold-rolled steel (CRS) were found much superior in corrosion protection over those of conventional Poly(o-ethoxyaniline) based on a series of electrochemical measurements of corrosion potential, polarization resistance, and corrosion current in 5 wt-% aqueous NaCl electrolyte. The molecular weights of poly(o-ethoxyaniline) extracted from PCN materials and bulk poly(o-ethoxyaniline) were determined by gel permeation chromatography (GPC). Effects of the material composition on the gas barrier property, thermal stability, and mechanical strength of poly(o-ethoxyaniline) along with PCN materials, in the form of both fine power and free-standing film, were also studied by gas permeability measurements, differential scanning calorimetry , thermogravimetric analysis, and dynamic mechanical analysis.

並列關鍵字

Nanocomposite ； Poly(o-ethoxyaniline) ； Clay

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