羟基磷灰石包覆羟基锡酸钙复合微纳米阻燃剂的制备及其阻燃性能  

Preparation of calcium hydroxystannate coated by hydroxyapatite hybrid micro-nano flame retardant and its flame retardant properties

作　　者：王增豪 马益恒 娄元猛 董璐铭 马海云[1,2,3] WANG Zenghao;MA Yiheng;LOU Yuanmeng;DONG Luming;MA Haiyun(College of Chemistry and Environmental Science,Hebei University,Baoding 071002,China;Key Laboratory of Analytical Science and Technology of Hebei Province,Hebei University,Baoding 071002,China;The Flame Retardant Material and Processing Technology Engineering Research Center of Hebei Province,Baoding 071002,China)

机构地区：[1]河北大学化学与环境科学学院,保定071002 [2]河北大学河北省分析科学技术重点实验室,保定071002 [3]河北省阻燃材料与加工技术工程技术研究中心,保定071002

出　　处：《复合材料学报》2023年第5期2699-2708,共10页Acta Materiae Compositae Sinica

基　　金：国家自然科学基金(52173073)。

摘　　要：羟基锡酸盐是近些年来人们日益关注的新型阻燃剂。本文从阻燃设计入手,通过化学共沉淀法合成了亚微米级羟基锡酸钙(CSH)立方体,并通过高倍模拟体液法原位快速包覆羟基磷灰石(HA),得到羟基磷灰石包覆的羟基锡酸钙(CSH@HA)复合微纳米阻燃剂,并应用于软质聚氯乙烯(PVC)的阻燃研究。研究结果表明:CSH@HA对PVC展现出优异的阻燃效果。极少量的CSH@HA即能显著提高PVC的极限氧指数(LOI),降低PVC燃烧时的热释放速率、热释放量、烟释放量和CO排放量。CSH@HA在PVC降解过程中通过与HCl反应,保护内层CSH,将PVC转化为更稳定的炭层结构。低填充量CSH@HA还在保持PVC的力学性能的同时提升材料的韧性。本文得到的CSH@HA复合阻燃剂为高效环保阻燃剂的开发提供了思路。Hydroxystannate is a novel flame retardant aroused in recent years.In this study,starting from the flame retardant design,submicron calcium hydroxystannate(CSH)cubes were synthesized by chemical co-precipitation method,and then were rapidly in-situ coated by hydroxyapatite(HA)in simulated body fluid with high concentrations.Finally,the hybrid CSH@HA micro-nano particles were prepared and applied to the flame retardant flexible polyvinyl chloride(PVC).The results show that CSH@HA exhibits excellent flame retardancy on PVC.A very small amount of CSH@HA can significantly increase the limit oxygen index(LOI)value,and reduce the heat release rate,total heat release,total smoke release and CO production during combustion of PVC.By reacting with HCl generated during the degradation of PVC,CSH@HA protects the inner CSH and promotes more PVC into stable chars.The low loading of CSH@HA also improves the toughness of PVC while maintaining the mechanical properties.The CSH@HA hybrid flame retardant obtained in this paper pave a new way to the development of novel flame retardants.

关 键 词：羟基锡酸钙 羟基磷灰石 阻燃机制 复合材料 成炭 

分 类 号：O631[理学—高分子化学] TB332[理学—化学]