Synthesis and surface modification of nanophosphorous-based flame retardant agent by continuous flow hydrothermal synthesis

作     者：Sherif Elbasuney Hosam E.Mostafa 

作者机构：School of Chemical EngineeringMilitary Technical College 

出 版 物：《Particuology》 (颗粒学报（英文版）)

年 卷 期：2015年第13卷第5期

页      面：82-88页

核心收录：

学科分类：07[理学] 070205[理学-凝聚态物理] 08[工学] 080501[工学-材料物理与化学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：Financial support of the research project entitled "Enhanced Flame Retardant Polymer Nanocomposites" has been provided by the Egyptian Military Technical College Cairo Egypt 

主　　题：Flame retardancy Phosphorous-based agent Nanocomposites Hydrothermal synthesis Hydroxyapatite 

摘      要：Nanoparticles can provide flame retardance to hosting polymers and act as nano fire extinguishers. Hydroxyapatite （Ca5（OH）（PO4）3） （HA） is not hygroscopic, and is thermally stable up to 800℃, with 18.5 wt% phosphorous content. It is this high phosphorous content that can provide HA with flame retardant properties. In this paper, we report on the continuous synthesis of ultrafine HA using a hydrothermal synthesis technique. The HA surface properties were changed from hydrophilic to hydrophobic by post-synthesis surface modification. The ratio of the HA nanoparticles and an intumescent agent known as Exolit AP750 was investigated to yield a self-extinguishing multi-component epoxy nanocomposite for extended application under extreme fire conditions. The HA/AP750/epoxy nanocomposite was able to resist a flame at 1700 oc and self-extinguish after the flame had been removed. The nanocomposite showed an enhanced flammability performance in standard cone calorimetry testing and formed a compact and cohesive protective char layer with a 50% decrease in peak heat released compared with virgin epoxy. Our aim was to establish the use of HA as an effective nanofiller with phosphorous-based flame retardant properties. The surface of this nano fire extinguisher was modified effectively with different surfactants for enhanced compatibility with different polymeric matrices.