炭纤维表面聚酰亚胺涂层的制备及表征

原浩杰; 吕春祥; 张寿春; 吴刚平

doi:10.1016/S1872-5805(15)60179-2

炭纤维表面聚酰亚胺涂层的制备及表征

doi: 10.1016/S1872-5805(15)60179-2

1.
中国科学院山西煤炭化学研究所碳纤维制备技术国家工程实验室, 山西太原030001;
2.
中国科学院大学, 北京100049

基金项目: 国家自然科学基金(50602045).

详细信息

作者简介:
原浩杰,博士研究生. E-mail: yuanhaojie251@126.com

通讯作者:
张寿春,研究员. E-mail: zschun@sxicc.ac.cn

中图分类号: TQ342⁺.76
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- 文章访问数: 1065
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- 被引次数: 0
出版历程
- 收稿日期: 2015-02-16
- 录用日期: 2015-05-04
- 修回日期: 2015-04-01
- 刊出日期: 2015-04-28

Preparation and characterization of a polyimide coating on the surface of carbon fibers

1.
National Engineering Laboratory for Carbon Fiber Technology, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China;
2.
University of Chinese Academy of Sciences, Beijing 100049, China

Funds: National Natural Science Foundation of China (50602045).

摘要

摘要: 采用一种不含有机溶剂的聚酰胺酸上浆剂实施上浆处理,为在T300级炭纤维(3 k)表面制备聚酰亚胺(PI)涂层提供一种绿色途径。通过傅里叶变换红外光谱和扫描电子显微镜对PI涂覆炭纤维的表面进行分析,结果表明,在炭纤维表面形成一层连续且均一的PI涂层。通过热重分析和单丝拉伸测试,考察炭纤维的热稳定性。与包含环氧上浆剂的炭纤维相比,在耐高温树脂的加工温度范围(300~400 ℃)内PI涂覆炭纤维表现出优异的热稳定性,起始分解温度与5%热失重温度分别高达567 ℃及619 ℃。此外,在空气中、400 ℃条件下氧化1 h后,PI涂覆炭纤维的拉伸强度仅下降6%,明显低于包含环氧上浆剂炭纤维(拉伸强度下降22%)。
- 炭纤维 /
- 表面改性 /
- 热稳定性 /
- 聚酰亚胺涂层
Abstract: Organic, solvent-free polyamic acid sizing was coated onto T300 grade carbon fibers (3k) to prepare a polyimide (PI) coating having a high thermal stability and oxidative resistance. The surface of PI-coated carbon fibers was characterized by FTIR and SEM. The mechanical strength of the carbon fibers, thermal stability and oxidative resistance of the coating were also investigated. Results indicate that a continuous and uniform PI coating is formed on the surface of the carbon fibers. Compared to a carbon fiber coating with epoxy, the PI coating produces excellent thermal stability with onset decomposition and a 5% weight-loss temperatures of 567 and 619 ℃, respectively. The tensile strength of PI-coated carbon fibers after thermal oxidation in air at 400 ℃ for 1 h has only a slight decrease of 6%, which is significantly lower than the decrease of 22% for epoxy-coated fibers.
- Carbon fiber /
- Surface modification /
- Thermal stability /
- Polyimide coating

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