高岭石基固体酸材料制备及其对聚丙烯复合材料阻燃性能影响  

Preparation of Solid Acid Materials from Kaolinite and Its Effect on Flame-Retardancy of Polypropylene Composite

作　　者：唐武飞 谷晓昱[2] 张胜[2] TANG Wufei;GU Xiaoyu;ZHANG Sheng(College of Chemistry and Bioengineering,Hunan University of Science and Engineering,Yongzhou 425199,Hunan,China;College of Materials Science and Engineering,Beijing University of Chemical Technology,Beijing 100029,China)

机构地区：[1]湖南科技学院化学与生物工程学院,湖南永州425199 [2]北京化工大学材料科学与工程学院,北京100029

出　　处：《硅酸盐学报》2020年第10期1552-1558,共7页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金(51873005)。

摘　　要：通过高温煅烧和酸反应等方法处理高岭石(K),制备高岭石基固体酸材料(A–K),并通过X射线衍射仪(XRD)和扫描电子显微镜(SEM)对其进行表征和分析。然后通过熔融挤出共混,将A–K添加到聚丙烯(PP)复合材料中,改善其阻燃性能。利用极限氧指数仪、水平垂直燃烧仪、锥型量热仪和万能试验机分别测试材料阻燃性能和力学性能。结果表明:少量A–K[(0.5%~3.0%(质量分数)]可明显改善PP复合材料阻燃性能,PP复合材料的最大热释放速率从纯PP的1 474 kW/m^2大幅下降至177 kW/m^2。Solid acid materials(A–K) were prepared via calcination of kaolinite(K) and successive acid treatment. The structure of products was characterized by X-ray diffraction(XRD) and scanning electronic microscopy(SEM). A–K was then introduced into polypropylene(PP) composites to further enhance the flame retardancy. The flammability and mechanical properties were evaluated by limiting oxygen index, vertical burning test, cone calorimetry and universal test. The results show that the peak heat release rate for PP composite with a loading A–K(0.5%–3.0%, in mass fraction] can reduce from 1 474 kW/m^2 of neat PP to 177 kW/m^2.

关 键 词：高岭石 固体酸 聚丙烯 阻燃 

分 类 号：TQ322.2[化学工程—合成树脂塑料工业]