| 低剪切混合方法制备炭黑/聚丙烯纳米复合材料及其电性能研究 |
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| 引用本文： | 李尉,刘正英,冯建民,杨鸣波.低剪切混合方法制备炭黑/聚丙烯纳米复合材料及其电性能研究[J].高分子学报,2009,0(1):40-44. |
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| 作者姓名： | 李尉 刘正英 冯建民 杨鸣波 |
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| 作者单位： | 四川大学高分子科学与工程学院高分子材料工程国家重点实验室,成都,610065 |
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| 摘 要： | 采用一种在低剪切应力场下纳米复合材料的加工方法,制备得到纳米炭黑(CB)粒子在聚丙烯(PP)中以纳米尺度分散的聚合物导电复合材料.扫描电镜观察表明CB粒子在纳米复合材料中以纳米尺度存在,并均匀的分布在PP基体中.电性能测试发现,通过这种低剪切混合方法得到的纳米复合材料具有非常低的导电逾渗阈值(vc=2.49vol%)和较高的临界电阻指数(t=5.82),很大的偏离了普适逾渗理论.基于隧道逾渗模型对体系的电导率进行了模拟,并对CB的分散状态与导电网络的关系进行了分析.发现当纳米CB粒子以纳米尺度分散于基体中时,并不遵从接触导电机理,而是隧道逾渗机理在CB/PP纳米复合材料中起主导作用.
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| 关 键 词： | 炭黑 纳米复合材料 导电 隧道逾渗模型 |
| 收稿时间： | 2008-04-02 |
PROPERTIES OF CARBON BLACK/POLYPROPYLENE NANOCOMPOSITES WITH LOW PERCOLATION THRESHOLD PREPARED BY MILD BLENDING METHOD |
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| LI Wei,LIU Zheng-ying,FENG Jian-min,YANG Ming-bo.PROPERTIES OF CARBON BLACK/POLYPROPYLENE NANOCOMPOSITES WITH LOW PERCOLATION THRESHOLD PREPARED BY MILD BLENDING METHOD[J].Acta Polymerica Sinica,2009,0(1):40-44. |
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| Authors: | LI Wei LIU Zheng-ying FENG Jian-min YANG Ming-bo |
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| Institution: | College of Polymer Science and Engineering;State Key Laboratory of Polymer Materials Engineering;Sichuan University;Chengdu 610065 |
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| Abstract: | Carbon black(CB)-filled polypropylene(PP)nanocomposites were prepared by using a mild blending method in the present study.In this compounding process,the CB particles were first dispersed at the nanoscale in aqueous suspension by ultrasonic irradiation.Subsequently,the CB suspension was blended with melting PP using a twin-screw extruder with low shear stress screw configuration,followed by removing the vapor from the vent by vacuum,and the CB particles were located in the PP matrix almost as they were in ... |
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| Keywords: | Carbon black Nanocomposite Conductivity Percolation-tunneling model |
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