镁铝水滑石阻燃剂表面改性及其机理  

Surface Modification of Mg–Al Hydrotalcite Flame-retardant

作　　者：徐圣[1] 曾虹燕[1] 赵策[1] 廖梦尘[1] 杨永杰[1] 张伟[1] 陶静[1] 肖华淼[1] 

机构地区：[1]湘潭大学化工学院,湖南湘潭411105

出　　处：《硅酸盐学报》2013年第4期527-533,共7页Journal of The Chinese Ceramic Society

基　　金：湖南省自科基金重点项目(12JJ2008);湖南省高校创新平台开放基金项目(12K048);2012年湖南省大学生创新性实验计划资助项目

摘　　要：采用三聚磷酸钠(STPP)对镁铝水滑石(MAH)进行表面改性。X射线衍射、扫描电子显微镜、能谱、热重–差热、红外光谱比表积测试和粒度分析对改性前后的镁铝水滑石进行表征,考察了改性前后镁铝水滑石的吸油性能和润湿性能。结果表明:三聚磷酸根(53 10P O)包覆于镁铝水滑石粒子表面,改性后的镁铝水滑石粒子表面疏水性增强,分散性明显提高。将改性前后镁铝水滑石样品(SMAH)与聚丙烯(PP)混合固化,测试其复合材料(MAH/PP、SMAH/PP)阻燃性和力学性能,发现相对于MAH/PP,SMAH/PP复合材料力学性能有所提高,阻燃性能也得以改善。The surface modification of Mg-Al hydrytalcite particle （MAH） by sodium tripolyphosphate （STPP） was carried out. The unmodified （MAH） and modified MAHs （SMAH） were characterized by X-ray diffraction, scanning electron microscopy, energy dispersive spectroscopy, Fourier transform infrared spectroscopy, thermogravimetric-derivative thermogravimetric analysis, specific surface area measurement and particle size analysis, respectively. The oil absorption and wettability of the particles were investigated. The results show that the surface of the MAH is coated by P3O^5-10 in the modification process. The hydrophobic property of the SMAH particles was strengthened, and the congeries dispersibility was improved. The composites （MAH/PP, SMAH/PP） were obtained by mixing MAH and SMAH into Polypropylene （PP）, respectively. The flame retardancy and mechanical properties of the composites were analyzed. Compared to the MAH/PP sample, the mechanical properties of the SMAH/PP composite was increased, and the flame retardancy was enhanced.

关 键 词：镁铝水滑石 阻燃剂 改性 三聚磷酸钠 聚丙烯 

分 类 号：TQ132.2[化学工程—无机化工] TQ326.9