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首页> 外文期刊>Journal of Applied Polymer Science >Improvement in the properties of PAN-based carbon films by modification with cobaltous chloride
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Improvement in the properties of PAN-based carbon films by modification with cobaltous chloride

机译：通过氯化钴改性改善PAN基碳膜的性能

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摘要

Carbon films were developed from polyacrylonitrile (PAN) modified with cobalt chloride. The modification was carried out by immersing PAN in a 5% cobaltous chloride (CoCl_2) solution at 90°C for 5 min, oven-dried, and then manufactured into films. The original and modified PAN films were oxidized at 220°C for 2 and 6 h in air, respectively, and finally carbonized at 1300°C. The density, microstructure, elemental analyzer, electrical conductivity, and morphology were all studied. According to the results, it was found that films modified with cobalt chloride have a greater stacking height of carbon-layer planes (L_c), density, electrical conductivity, and nitrogen content after carbonization. Moreover, during the carbonization stage, the cobalt ions promote a catalytic action. The carbon films developed from the modified film not only improved electrical conductivity by 12-38%, but also increased tensile strength by 29-36% and the tensile modulus by 69-110%. Therefore, carbon films having better mechanical properties can be obtained after such modification.
机译：碳膜由用氯化钴改性的聚丙烯腈（PAN）制成。通过将PAN在90°C下浸入5％氯化钴（CoCl_2）溶液中5分钟，进行烘箱干燥，然后制成薄膜，进行改性。原始和改性的PAN膜分别在空气中于220°C氧化2小时和6 h，最后在1300°C碳化。研究了密度，微观结构，元素分析仪，电导率和形态。根据结果​​，发现用氯化钴改性的膜在碳化后具有更大的碳层平面堆积高度（L_c），密度，电导率和氮含量。此外，在碳化阶段，钴离子促进催化作用。由改性膜形成的碳膜不仅使导电率提高了12-38％，而且使拉伸强度提高了29-36％，并且拉伸模量提高了69-110％。因此，在这样的改性之后可以获得具有更好的机械性能的碳膜。

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