Effect of carbon black on improving thermal stability, flame retardancy and electrical conductivity of polypropylene/carbon fiber composites
Effect of carbon black on improving thermal stability, flame retardancy and electrical conductivity of polypropylene/carbon fiber composites
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DOI：
10.1016/j.compscitech.2015.03.013
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发表时间：
2015-06
影响因子：
9.1
通讯作者：
Hongfan Yang;J. Gong;Xin Wen;Xue Jian;Qing Chen;Zhiwei Jiang;Nana Tian;T. Tang
中科院分区：
文献类型：
--
作者：
Hongfan Yang;J. Gong;Xin Wen;Xue Jian;Qing Chen;Zhiwei Jiang;Nana Tian;T. Tang
本文将炭黑（CB）引入到聚丙烯/碳纤维（PP/CF）复合材料中，制备了热稳定性、阻燃性和导电性均得到改善的多功能复合材料。形态研究表明，一维和零维碳纤维在PP基体中分散良好，形成了多级结构。与原始PP相比，在空气气氛下的最大失重温度提高了79 °C。锥形量热计测得的放热速率峰值显著降低了70%，总放热量从198 MJ/m2降低到166 MJ/m2。PP复合材料阻燃性能的显著提高归因于在PP基体中形成了一个强大的三维（3D）网络结构，其中一维CF作为桥梁连接各个零维CB，CB和CF加速了PP自由基的氧化交联反应。此外，PP复合材料的电导率显着提高到7.8 S/m，由于从CB和CF在基体内形成的三维导电通路。
In this work, carbon black (CB) was introduced into polypropylene/carbon fiber (PP/CF) composite to fabricate multifunctional composites with the improved thermal stability, flame retardancy and electrical conductivity. The morphology investigation showed that one-dimensional CF and zero-dimensional were well dispersed in the PP matrix, and the multistage structure was formed in PP matrix. Compared to pristine PP, the maximum weight loss temperature under air atmosphere was enhanced by 79 °C. The peak value of the heat release rate measured by a cone calorimeter was significantly reduced by 70%, and the total heat release decreased from 198 to 166 MJ/m2. The dramatically enhanced flame retardancy of PP composites was attributed to the formation of a strong three-dimensional (3D) network structure in PP matrix where one-dimensional CF acted as bridges connecting individual zero-dimensional CB, and the accelerated oxidation crosslinking reaction of PP radicals by CB and CF. Furthermore, the electrical conductivity of PP composites was significantly enhanced to 7.8 S/m due to the formation of 3D conductive pathways from CB and CF within the matrix.