凝固浴组成对聚丙烯腈基中空中孔纤维结构和性能的影响

张兵; 吕春祥; 刘耀东; 周普查; 袁淑霞; 尉壮

凝固浴组成对聚丙烯腈基中空中孔纤维结构和性能的影响

张兵^1,2,
吕春祥^1,3,,
刘耀东^1,3,
周普查^1,3,
袁淑霞^1,3,
尉壮^1,2

1.
中国科学院山西煤炭化学研究所, 中国科学院炭材料重点实验室, 山西太原 030001;
2.
中国科学院大学, 北京 100049;
3.
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

基金项目: 国家自然科学基金（51303199）.

详细信息

作者简介:
张兵,博士研究生.E-mail:zhangbing15@mails.ucas.ac.cn

通讯作者:
吕春祥,研究员.E-mail:lucx@sxicc.ac.cn;刘耀东,研究员.E-mail:liuyd@sxicc.ac.cn

中图分类号: TQ342⁺.74
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- 文章访问数: 313
- HTML全文浏览量: 97
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- 被引次数: 0
出版历程
- 收稿日期: 2018-12-25
- 录用日期: 2019-02-20
- 修回日期: 2019-02-02
- 刊出日期: 2019-02-28

The effect of the composition of the solution in the coagulation bath on the microstructures of hollow mesoporous polyacrylonitrile fibers

1.
CAS Key Laboratory of Carbon Materials, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China;
2.
University of Chinese Academy of Sciences, Beijing 100049, China;
3.
National Engineering Laboratory for Carbon Fiber Technology, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China

Funds: National Natural Science Foundation of China (51303199).

摘要

摘要: 中空中孔纤维作为一种新型材料，兼具中空和介孔的特性，对拓展中空纤维中大分子发挥作用的应用领域具有重要的影响。本文采用湿法纺丝相分离的方法成功制备了中空中孔纤维，并且采用扫描电镜、氮气物理吸附仪、热重分析仪等仪器对纤维结构和性能进行了表征。通过控制凝固浴组成，实现了对纤维直径和孔隙结构的调控，凝固浴中二甲基亚砜浓度的增加，纤维直径和孔隙率先减小后增加，壁上的介孔向小尺寸方向移动。600℃炭化时纤维的炭收率均大于40%，有望将其加工成为炭纤维，为中空中孔炭纤维的制备提供实验支撑。
- 聚丙烯腈 /
- 中空中孔纤维 /
- 凝固浴组成
Abstract: Combining the advantages of hollow and mesoporous structures, hollow mesoporous fibers have great potential in the adsorption of macromolecules. Such fibers were fabricated by a wet-spinning method from a polymer mixture of polyacrylonitrile and alkali lignin. The effect of the composition of the solution in the coagulation bath on the microstructures of the hollow mesoporous fibers produced was investigated by SEM, TGA and nitrogen adsorption. Results indicate that the diameter and pore structure of the fibers were changed by the composition of the solution in the coagulation bath. By increasing the concentration of dimethyl sulfoxide, the average pore size of the fibers decreased from 45.3 to 24.4 nm while the outer diameter and porosity reached minima of 137.5 μm and 88.7%, respectively while the wall thickness reached a maximum of 20.3 μm. The fibers can be processed into hollow mesoporous carbon fibers because of their high carbon yield of 40%.
- Polyacrylonitrile /
- Hollow-mesoporous fibers /
- Composition of coagulation bath

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参考文献(22)

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