碳纤维表面元素在高温下的演变规律

doi:10.16085/j.issn.1000-6613.2017-0900

化工进展 ›› 2017, Vol. 36 ›› Issue (S1): 332-338.DOI: 10.16085/j.issn.1000-6613.2017-0900

碳纤维表面元素在高温下的演变规律

郝伟哲¹, 王壮志², 张学军¹, 田艳红¹

1. 北京化工大学碳纤维及功能高分子教育部重点实验室, 北京 100029;
2. 威海拓展纤维有限公司, 山东威海 264200

收稿日期:2017-05-15 修回日期:2017-07-13 出版日期:2017-12-31 发布日期:2017-12-13
通讯作者: 张学军,副研究员,研究方向为高模量碳纤维及其复合材料。
作者简介:郝伟哲(1994-),男,硕士研究生。
基金资助:
国家高科技研究发展计划项目（2015AA03A202）。

Evolution of element on the surface of carbon fiber during heat treatment

HAO Weizhe¹, WANG Zhuangzhi², ZHANG Xuejun¹, TIAN Yanhong¹

1. Key Laboratory of Carbon Fiber and Functional Polymers of Ministry of Education, Beijing University of Chemical Technology, Beijing 100029, China;
2. Weihai Tuozhan Fiber Co., Ltd., Weihai 264200, Shandong, China

Received:2017-05-15 Revised:2017-07-13 Online:2017-12-31 Published:2017-12-13

摘要/Abstract

摘要： 碳纤维表面元素含量与热处理温度密切相关。本文采用X射线光电子能谱（XPS）分析了经过2000℃以上的高温热处理过程后的碳纤维样品的元素含量和化学状态，研究了碳纤维所含元素种类及其含量随着热处理温度变化的演变规律。实验结果显示，随着热处理温度的提高，碳纤维中碳元素相对含量不断提高。同时，sp²杂化成键的碳元素含量提高，sp³杂化成键的碳元素含量降低；氧元素含量随着热处理温度的提高而下降，主要由O—C键的断裂所致；硅元素含量基本不随热处理温度的变化而变化。其在碳纤维的主要存在形式为SiO₂与Si₃N₄，SiO₂的相对含量随着热处理温度的提高而提高，这与Si—N键的断裂并向Si—O键转化有关。

关键词: 碳纤维, 表面, 热处理, 反应, 化学过程, 元素含量, X光电子能谱

Abstract: The content of element on the surface of carbon fiber is strongly correlated to the temperature during heat treatment. This paper mainly discusses the evolution of type and content of different elements due to the change of heat treatment temperature (HTT). X-ray photoelectron spectroscopy (XPS) is used to analyze the content and chemical state of elements of different carbon fibers undergone heat treatment with HTTs above 2000℃. The result shows that relative content of carbon increases with the increase of HTT, with the content of sp²-hybridized carbon increasing and the content of sp³-hybridized carbon decreasing at the same time. Oxygen content decreases at higher HTT, due to the breaking of O-C bonds. Silicon content remains almost constant with the variation of HTT. Silicon is mainly in the form of SiO₂ and Si₃N₄. The relative content of SiO₂ increases at the elevated HTT, which is attributed to the breaking of Si-N bonds and their converting to Si-O bonds.

Key words: carbon fiber, surface, heat treatment, reaction, chemical processes, element content, X-ray photoelectron spectroscopy

中图分类号:

TQ342.74

郝伟哲, 王壮志, 张学军, 田艳红. 碳纤维表面元素在高温下的演变规律[J]. 化工进展, 2017, 36(S1): 332-338.

HAO Weizhe, WANG Zhuangzhi, ZHANG Xuejun, TIAN Yanhong. Evolution of element on the surface of carbon fiber during heat treatment[J]. Chemical Industry and Engineering Progress, 2017, 36(S1): 332-338.

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碳纤维表面元素在高温下的演变规律

Evolution of element on the surface of carbon fiber during heat treatment

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