Hybrid Organo鈥揑norganic Clay with Nonionic Interlayers. Mid- and Near-IR Spectroscopic Studies

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• 作者：Elisabetta Finocchio ; Irene Baccini ; Cinzia Cristiani ; Giovanni Dotelli ; Paola Gallo Stampino ; Luca Zampori
• 刊名：Journal of Physical Chemistry A
• 出版年：2011
• 出版时间：July 7, 2011
• 年：2011
• 卷：115
• 期：26
• 页码：7484-7493
• 全文大小：1153K
• 年卷期：v.115,no.26(July 7, 2011)
• ISSN：1520-5215

文摘

The intercalation of organic polymers molecules (i.e., PEGs and BRIJ) into a standard Ca-montmorillonite has been studied by XRD, TG, and IR spectroscopy. The polymer intercalation is confirmed by the increasing of the d₀₀₁ in XRD spectra as well as by the complex multisteps thermal decomposition behavior of the organo-clay materials. Mid-IR and diffuse reflectance near-IR spectra of the intercalated materials show the polymer diagnostic bands (CH stretching and deformation mode), shifted or changed in shape by the interaction with the clay matrix. Both PEG 1500 and PEG 4000 based materials are likely intercalated in an extended configuration, similar to the amorphous polymer form. BRIJ intercalated polymer spectra suggest the disordered conformation of the alkilic chain in a prevailing 鈥済auche鈥? poorly packed, conformation. Host montmorillonite IR bands, mainly OH and water stretching and deformation fundamentals, combination, and overtone bands, are reduced in intensity by polymer intercalation, pointing out an interaction, likely through H-bonding and/or a possible substitution of cations hydration water molecules.