Layered compounds iron-based oxides

The layered compound iron(lll) chloride oxide FeOCl absorbs pyridine derivative molecules into its van der Waals gap forming the intercalation compounds FeOCl (pyridine derivative), . Iron(III) chloride oxide and the pyridine derivatives act, respectively, as a Lewis acid and base in the reaction with a partial transfer of the pyridine derivative electrons to the host FeOCl layer. Electrical resistivity of the host FeOCl decreases from 107 2-cm to 103 J2-cm with intercalation, and the interlayer distance expands to almost twice the original value. 

Generally, the inorganic materials used to prepare the nanocomposites mainly include layered silicate clay, layered compounds, metal powder, and a variety of inorganic oxides. In our research works, nanosized zinc oxide, iron oxide, silica, and YIG particles were synthesized and used to prepare a variety of polymer nanocomposites, giving the composite materials many new features. This chapter based on our research discusses the methods of preparation and characterization of the polymer-inorganic nanocomposites. 

Two types of paint systems were used for experiments. First system used was zinc phosphate primer (50 % Zn as compound) with micaceous iron oxide (MIO) as intermediate coat followed by polyurethane (PU) as top coat denoted as ZP. Other system used was zinc rich primer (80 % Zn as dust) with MIO as intermediate coat and PU as top coat denoted as ZR. This system is costlier with respect to ZP and considered for laboratory evaluations purpose only. ZP is designed with respect to places where test panels are deployed for exposure based on manufacturers catalogues and standards [4]. These systems possess good resistance from water permeability, weathering, abrasion and good adhesion to maintain a proper barrier to the environment. The drying mechanism of the systems is the reaction between epoxy resin and polyamide. The details of each paint system used comprising primer, intermediate and top coats with the respective layer of film thickness are shown in Table 2.2. 

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