静电纺丝制备定向排列聚酰亚胺基炭纳米纤维

张振兴; 杜鸿达; 李佳; 干林; 郑心纬; 李宝华; 康飞宇

静电纺丝制备定向排列聚酰亚胺基炭纳米纤维

1.
清华大学深圳研究生院, 深圳市热管理工程与材料重点实验室, 广东深圳 518055;
2.
清华大学材料学院先进材料教育部重点实验室, 北京 100084

基金项目: 973计划(2014CB932401);国家自然科学基金(51232005);深圳市基础研究项目(201105201119A,20120831165730895).

详细信息

作者简介:
张振兴,硕士研究生.E-mail:richardzhang9038@gmail.com

通讯作者:
杜鸿达,副研究员.E-mail:duhd@sz.tsinghua.edu.cn

中图分类号: TQ127.1⁺1
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- 文章访问数: 666
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- 被引次数: 0
出版历程
- 收稿日期: 2015-03-20
- 录用日期: 2015-09-07
- 修回日期: 2015-08-09
- 刊出日期: 2015-08-28

Preparation of aligned polyimide-based carbon nanofibers by electrospinning

1.
Key Lab of Thermal Management Engineering and Materials, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055;
2.
Key Lab of Advanced Materials, School of Materials Science and Engineering, Tsinghua University, Beijing 100084

Funds: 973 Program(2014CB932401); National Natural Science Foundation of China(51232005); Shenzhen Basic Research Project(201105201119A,20120831165730895).

摘要

摘要: 均苯四甲酸二酐和二氨基二苯醚溶解在N,N-二甲基乙酰胺中,室温下聚合为聚酰胺酸。以聚酰胺酸溶液作为前驱体,在20 kV电压下静电纺丝,然后进行350 ℃热亚胺化处理可得到定向排列的聚酰亚胺纳米纤维,再于900 ℃炭化、3 000 ℃石墨化,得到均匀连续、定向排列的聚酰亚胺基炭纳米纤维,纤维直径约100 nm。结果表明,聚酰胺酸质量分数为20%的溶液电纺性能最佳,3 000 ℃石墨化处理后的炭纳米纤维具有典型的石墨结构。
- 炭纳米纤维 /
- 静电纺丝 /
- 定向排列
Abstract: Polyimide (PI) is a good carbon precursor owing to its high carbon yield and easy graphitization. PI nanofibers prepared by electrospinning were carbonized and graphitized to prepare aligned carbon nanofibers. Pyromelliticdianhydride and 4,4'-diaminodiphenyl ether were dissolved in N,N-dimethylacetamide at room temperature and stirred for 2 h to obtain a polyamide acid (PAA) solution, which was electrospun into aligned PAA nanofibers at 20 kV and collected by a rolling cylinder 18 cm below the needle with a rolling speed of 2 800 r/min. The PAA nanofibers were first imidized into the PI nanofibers at 350 ℃, then carbonized at 900 ℃ at a heating rate of 5 ℃/min and finally graphitized at 3 000 ℃ to obtain continuous and aligned polyimide-based carbon nanofibers. The PAA solution with a concentration of 20% was the most suitable for electrospinning. SEM characterization shows that the average diameter of the carbon nanofibers is around 100 nm. The carbon nanofibers after graphitization at 3 000 ℃ have a typical graphite structure.
- Carbon nanofiber /
- Electrospinning /
- Alignment

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