Heterogeneous Ultrathin Films of Poly(vinyl alcohol)/Layered Double Hydroxide and Montmorillonite Nanosheets via Layer-by-Layer Assembly

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• 作者：Shu Huang ; Xi Cen ; Hongdan Peng ; Shuzhong Guo ; Weizhi Wang ; Tianxi Liu
• 刊名：Journal of Physical Chemistry B
• 出版年：2009
• 出版时间：November 19, 2009
• 年：2009
• 卷：113
• 期：46
• 页码：15225-15230
• 全文大小：277K
• 年卷期：v.113,no.46(November 19, 2009)
• ISSN：1520-5207

文摘

In this paper, Co−Al layered double hydroxide (LDH) and montmorillonite (MMT) have been exfoliated into charged single layers in the solvent of formamide and water, respectively. The structures of individual layers of LDH and MMT were characterized by X-ray diffraction (XRD) and atomic force microscopy (AFM). The delamination mechanisms of LDH and MMT were also discussed. Furthermore, heterogeneous ultrathin films of poly(vinyl alcohol) (PVA)/charged inorganic nanosheets, (PVA/MMT/PVA/LDH)_n, were fabricated by layer-by-layer (LBL) assembly via hydrogen bonding. The LBL assembly process was monitored by UV−vis spectroscopy, and the structures of the heterogeneous ultrathin films were analyzed by XRD.