| 炭黑表面含氧量对HDPE-CB复合物导电性能的影响 |
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| 引用本文： | 潘镱,吴国章.炭黑表面含氧量对HDPE-CB复合物导电性能的影响[J].医学教育探索,2012,25(2). |
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| 作者姓名： | 潘镱 吴国章 |
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| 作者单位： | 华东理工大学材料科学与工程学院，上海市先进聚合物材料重点实验室，上海 200237;华东理工大学材料科学与工程学院，上海市先进聚合物材料重点实验室，上海 200238 |
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| 基金项目： | 国家自然科学基金(20974033) |
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| 摘 要： | 通过硝酸氧化处理炭黑(CB)，使其表面含氧量(氧元素与碳元素的摩尔百分比)由1.0%(CB1)提高到7.0%(CB2)。分别以CB1和CB2为填料，以高密度聚乙烯(HDPE)为基体，制备了两种导电复合材料。与碳粒子填充极性聚合物相反，表面含氧量高的CB2填充HDPE复合物的渗流阈值低。采用SEM、动态电渗流效应和Payne效应分析了两种炭黑在HDPE中的分散和凝聚特征。结果表明：CB2在HDPE中分散更不均匀，更容易凝聚形成网络。炭黑在非极性HDPE中凝聚形成导电网络的能力随炭黑表面含氧量的增加而提高。
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| 关 键 词： | 炭黑 表面含氧量 导电复合材料 渗流 凝聚 |
Effect of Surface Oxygen Content of Carbon Black on Electrical Properties of HDPE Carbon Black Composites |
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| PAN Yi and WU Guo zhang.Effect of Surface Oxygen Content of Carbon Black on Electrical Properties of HDPE Carbon Black Composites[J].Researches in Medical Education,2012,25(2). |
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| Authors: | PAN Yi and WU Guo zhang |
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| Institution: | Shanghai Key Laboratory of Advanced Polymeric Materials, School of Materials Science and
Engineering, East China University of Science and Technology, Shanghai 200237, China;Shanghai Key Laboratory of Advanced Polymeric Materials, School of Materials Science and
Engineering, East China University of Science and Technology, Shanghai 200238, China |
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| Abstract: | Carbon black (CB) was oxidized by HNO3 and the surface oxygen content (molar ratio of oxygen to carbon) of CB
increased from 1.0%(CB1) to 7.0%(CB2). Using CB1 and CB2 as fillers, high density polyethylene(HDPE) as matrix, two
conductive composites were prepared. With higher surface oxygen content of CB, the percolation threshold of filled HDPE
composites was lower, which was on contrary to that of carbon particles filled polar polymer composites of CB2. The
dispersion and agglomeration beha viors of CB1 and CB2 in HDPE were analyzed by scanning electron micrography, dynamic
percolation effect and Payne effect. Results showed that CB2 particles dispersed more unevenly and agglomerated to form
conductive networks more easily in HDPE matrix. The ability of CB agglomerate to form conductive networks in HDPE melt
increased with the increasing of the surface oxygen content of CB particles. |
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| Keywords: | carbon black surface oxygen content conductive composites percolation agglomeration |
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