Characterization of Strong and Crystalline Polyvinyl Alcohol/Montmorillonite Films Prepared by Layer-by-Layer Deposition Method

S. Gaidukov,I. Danilenko,G. Gaidukova

doi:10.1155/2015/123469

S. Gaidukov, I. Danilenko + Show 1 more

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https://doi.org/10.1155/2015/123469

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Abstract

The preparation of a high-strength and highly crystalline nanocomposite with a layered structure by the use of layer-by-layer deposition (LbL) method from polyvinyl alcohol (PVOH) and montmorillonite (MMT) platelets is reported. The crystallinity and interactions between the components were studied by the use of Fourier transform infrared spectroscopy (FT-IR), wide angle X-ray diffraction (WAXD), differential scanning calorimetry (DSC), and thermogravimetric analysis (TGA). The nanocomposite film structure was investigated by the use of scanning electron microscope (SEM) and atomic force microscopy (AFM). The stiffness of the LbL PVOH/MMT film was significantly higher compared to pure PVOH and conventional PVOH/MMT nanocomposite. The structural and thermal studies on thin PVOH/MMT films indicated the enhanced crystallinity of the polymer.

Highlights

The layer-by-layer (LbL) assembly is a simple method of thin film deposition [1]
The surface and the cross section of the polyvinyl alcohol (PVOH)/MMT film were examined with a scanning electron microscope (SEM) Tescan, Mira//LMU Schottky, at different magnifications and a voltage of 25 kV
It weight loss curves that heating was established from thermogravimetric analysis (TGA) the PVOH/MMT to 600∘C

Summary

Introduction

It was successfully applied to the preparation of thin composite films combining nanoparticles and polymer. It is simple method to produce from diverseby-nature raw materials high quality coatings and films of highly layered structure with regular coplanar orientation of the components [2]. Other deposition techniques that can be used for preparation of layered films are spin coating, Langmuir-Blodgett deposition, and others [3,4,5]. Nanocomposites are of scientific interest because of their improved properties due to the nanoparticle application and nanoscale interactions [6]. It has been reported that the thermal stability and permeability properties of composites could be greatly improved by the addition of nanoparticles [9, 10]

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Conclusion