Layer-by-layer self-assembled tubular films containing polyoxometalate on electrospun nanotibers

被引：58

作者：

Ding, Bin ^{[1
]}

Li, Chunrong

Fujita, Shiro

Shiratori, Seirnei

机构：

[1] Keio Univ, Fac Sci & Technol, Yokohama, Kanagawa 2238522, Japan

[2] SNT Co Ltd, Kawasaki, Kanagawa 2120054, Japan

来源：

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 2006年 / 284卷

关键词：

polyoxometalate; H3PMo12O40; electrospun nanofibers; layer-by-layer (LBL) self-assembly; morphology;

D O I：

10.1016/j.colsurfa.2005.10.085

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Self-assembled polyoxometalate (H3PMo12O40) ultrathin tubular films were fabricated on electrospun cellulose acetate (CA) nanofibers via the electrostatic layer-by-layer (LBL) adsorption of oppositely charged polyethylenimine (PEI) and H3PMo12O40. The films coated fibers were characterized by field emission scanning electron microscopy (FE-SEM), Fourier transform infrared (FT-IR) spectroscopy, X-ray photoelectron spectroscopy (XPS), and wide-angle X-ray diffraction (WAXD). The morphology of LBL films coated CA nanofibers was studied by regulating the pH value and ionic strength of PEI solutions, the number of PEI/H3PMo12O40 bilayers, and the concentration of H3PMo12O40. The results indicated that the growth of LBL films fabricated at a PEI pH of 2.5 and a H3PMo12O40 pH of 2.5 (PEI2.5/H(3)PMo(12)O(40)2.5) was much quicker than that of films of PEI and H3PMo12O40 adsorbed at pH 9 and 2.5 (PEI9/H(3)PMo(12)O(40)2.5), respectively. Moreover, the concentration of H3PMo12O40, the number of coating bilayers, and the ionic strength of PEI solutions also showed strong influence to the growth of LBL films on nanofibers. Additionally, the high porous LBL films coated fibers were found after the deposition of PEI/H3PMo12O40 films from a high ionic strength of PEI solutions. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：257 / 262

页数：6

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