Synthesis, Characterization, and Thermal Behavior of Nanoparticles of Mg(OH)2 to Be Used as Flame Retardants

A A Hanna,A S Abdelmoaty,M A Sherief

doi:10.1155/2019/1805280

Abstract

To study the effects of the precursor materials on the structure, the morphology, and the thermal stability of Mg(OH)2 particles, five samples were prepared by using the same method. The produced powder was characterized by using FTIR, XRD, SEM, and TEM, and the thermal stability was studied by using the thermogravimetric analysis. This study aims to use the advantage prepared material as a flame-retardant for the polymeric materials. The characterization of the obtained samples shows that Mg(OH)2 is formed in hexagonal phase and arranged in different shapes. The analysis of the data obtained from the TGA shows that Mg(OH)2 in general decomposed in three steps, the first one due to the water content and the other volatile materials, the second step represents the decomposition of Mg(OH)2 to produce MgO, and the third step represents the conversion of MgO to glassy layer. The samples prepared in presence of the surfactants gave a higher value for the formation of the glassy layer so that it is recommended to use this sample as flame retardant for the polymeric materials.

Highlights

E samples prepared in presence of the surfactants gave a higher value for the formation of the glassy layer so that it is recommended to use this sample as flame retardant for the polymeric materials
Introduction e polymer materials were used successfully in different applications because they have excellent chemical, mechanical, and electrical properties [1,2,3,4,5,6,7,8]. e polymer materials have two main drawbacks: the first one is their flammability and the thermal degradation which represent environmental pollution and the second one is smoke that consists of many toxic gases such as nitrogen oxides from polyamides and CO2, CO due to firing the organic materials, and the others due to their low melting point [9]. ese gases resist the work of the firemen because of the creation of an atmosphere loaded with smoke
Among the inorganic flame-retardant materials, Mg(OH)2 draws special attention of different authors [11,12,13,14,15] because it contains hydrated molecules when decomposed thermally at low temperature and its addition improves the mechanical properties of the polymers [16]. e effect of adding Mg(OH)2 on the flammability of polymers focused on the structure and the shape of the produced Mg(OH)2 powder

Summary

Introduction

E samples prepared in presence of the surfactants gave a higher value for the formation of the glassy layer so that it is recommended to use this sample as flame retardant for the polymeric materials. Among the inorganic flame-retardant materials, Mg(OH)2 draws special attention of different authors [11,12,13,14,15] because it contains hydrated molecules when decomposed thermally at low temperature and its addition improves the mechanical properties of the polymers [16].

Results

Conclusion