层层自组装改性剑麻纤维填充聚丙烯复合材料性能研究  

Properties of Polypropylene Composites Filled with Layer-by-layer Assembly Modified Sisal Fiber

作　　者：冯伟丽 康兴隆 柳妍 鲁哲宏 刘保英[1] 房晓敏[2] 丁涛[2] FENG Weili;KANG Xinglong;LIU Yan;LU Zhehong;LIU Baoying;FANG Xiaomin;DING Tao(Institute of Functional Polymer Composites,College of Chemistry and Chemical Engineering,Henan University,Kaifeng 475004,China;Henan Engineering Laboratory of Flame-Retardant and Functional Materials,Henan University,Kaifeng 475004,China)

机构地区：[1]河南大学化学化工学院功能聚合物复合材料研究所,开封475004 [2]河南大学阻燃与功能材料河南省工程实验室,开封475004

出　　处：《材料导报》2021年第10期10211-10215,共5页Materials Reports

基　　金：国家自然科学基金资助项目(51703051)。

摘　　要：采用氨基功能化纳米二氧化硅(RNS-A)和聚磷酸铵(APP),利用层层自组装(LBL)法对剑麻纤维(SF)进行表面改性(mSF),并通过熔融共混法制备了剑麻纤维填充的聚丙烯(PP)复合材料。利用锥形量热仪(Cone)研究了复合材料的燃烧行为,通过热分析(TG/DTG)研究了复合材料的热稳定性,通过扫描电镜(SEM)观察了复合材料残炭的形貌,利用万能力学测试仪考察了复合材料的力学性能,采用旋转流变仪考察了改性前后剑麻纤维对复合材料流变行为的影响。研究结果表明:与PP/SF体系相比,PP/mSF复合材料的热释放速率峰值(PHRR)降低至324.9 MJ/m^(2),下降了28.4%;残炭率提高至7.1%,增加了54.3%,并且燃烧后形成的炭层结构较为完整,但体系的拉伸强度有一定程度的下降。与纯PP相比,PP/SF和PP/mSF复合材料均表现出较高的动态模量和复数黏度。Sisal fibers(SF)were coated by amino functionalized nano-silica(RNS-A)and ammonium polyphosphate(APP)through layer-by-layer(LBL)assembly method,and polypropylene(PP)composites filled with sisal fiber were prepared by melt blending.The combustion behavior of composites was studied by cone calorimeter test(Cone),the thermal stability of composites was studied by thermogravimetric analysis(TG/DTG),the morphology of carbon residue was observed by scanning electron microscopy(SEM),the mechanical properties of composites were investigated by universal mechanical tester,and the effect of modified fiber on the rheological behavior of composite materials was investigated with a rotating rheometer.The results showed that compared with the PP/SF system,the peak heat release rate(PHRR)of PP/mSF composite was reduced to 324.9 MJ/m^(2),a decrease of 28.4%;the final amount of carbon residue was increased to 7.1%,increased by 54.3%,the structure of the carbon layer after combustion was relatively complete,but the tensile strength of the system decreased to some extent.Compared with pure PP,both PP/SF and PP/mSF composites showed high dynamic modulus and complex viscosity.

关 键 词：聚丙烯 剑麻纤维 层层自组装 阻燃性能 

分 类 号：TB332[一般工业技术—材料科学与工程]