Rheological and Optical Investigation of the Gelation and Phase Separation Behavior for PAN/DMSO/H<sub>2</sub>O System

Gao-ming MO; Yan-fei WANG; Ruo-yu ZHANG; Jian-xing YANG; Liu HE

doi:10.14028/j.cnki.1003-3726.2016.09.015

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Rheological and Optical Investigation of the Gelation and Phase Separation Behavior for PAN/DMSO/H₂O System

Special Issue for Celebrating 60th Anniversary of ICCAS | 更新时间：2022-09-12

- Rheological and Optical Investigation of the Gelation and Phase Separation Behavior for PAN/DMSO/H₂O System
- Polymer Bulletin Vol. 29, Issue 9, Pages: 162-170(2016)
- 作者机构：
  
  中国科学院宁波材料技术与工程研究所，宁波 315201
- 作者简介：
- 基金信息：
- DOI：10.14028/j.cnki.1003-3726.2016.09.015
  CLC：
- Published：20 September 2016，
  
  Received：15 July 2016，
  
  Revised：22 July 2016，
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Gao-ming MO, Yan-fei WANG, Ruo-yu ZHANG, Jian-xing YANG, Liu HE. Rheological and Optical Investigation of the Gelation and Phase Separation Behavior for PAN/DMSO/H₂O System. [J]. Polymer Bulletin 29(9):162-170(2016)
DOI：

Gao-ming MO, Yan-fei WANG, Ruo-yu ZHANG, Jian-xing YANG, Liu HE. Rheological and Optical Investigation of the Gelation and Phase Separation Behavior for PAN/DMSO/H₂O System. [J]. Polymer Bulletin 29(9):162-170(2016) DOI： 10.14028/j.cnki.1003-3726.2016.09.015.

摘要

碳纤维是非常重要的增强材料，在军工以及高档民用产品中用途广泛。因为聚丙烯腈原丝的结构会“遗传”到最终的碳纤维结构中，因此原丝结构对碳纤维的性能影响很大。原丝的结构是纺丝液在凝固浴中的相分离和凝胶化两个过程决定的，因此研究这两个过程的规律并进一步控制它们的进程，达到调控原丝结构的目的是非常重要的。本文介绍了本课题组利用流变学及光学的方法研究PAN/DMSO/H

O体系凝胶化及相分离行为的最新研究成果，主要探索了PAN/DMSO/H

O浓溶液中凝胶化行为，发现了二次自相似结构的形成并对其机理进行了分析，并对PAN/DMSO/H

O亚浓溶液中凝胶化与相分离的耦合过程进行了研究，分析了最终凝胶的结构特性及Winter-Chambon模型在此过程中的适用性。最后，对PAN/DMSO/H

O体系凝胶化及相分离行为的下一步研究进行了展望。

Abstract

Carbon fiber is a very important material that can reinforce other materials like polymers

and it is widely used in military weapons and high-end products. Since the structure of the original PAN fiber will propagate to that of final carbon fiber

the quality and performance of carbon fibers are largely depended on the preparation of PAN fiber. The phase separation and gelation processes during the solidification of PAN fiber decide its ultimate structure. Therefore

clarification of the mechanism of these two processes would benefit the control of the PAN fiber structure. In this feature article

we report the newly discovered results in PAN/DMSO/ H

O blends by using rheology and optical method. We find the second self-similar structure in PAN concentrated system and the underlying mechanism is also discussed. We also analyze the coupling of the phase separation and gelation in semi-dilute PAN concentration system

besides we also predict and explain the non-uniform structure of the resulted gel. Validity of the Chambon-Winter model is also confirmed in such phase separated system. At last

we forecast the future work on the PAN/DMSO/H

O blends.

关键词

聚丙烯腈凝胶化相分离流变光学显微镜

Keywords

PolyacrylonitrileGelationPhase separationRheologyOptical microscopy

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Related Institution

College of Materials Science and Engineering, Beijing University of Chemical Technology

Department of Material Science and Engineering, Luoyang Institute of Science and Technology

Key Laboratory of Functional Materials and Application of Fujian Province, Xiamen Engineering and Technology Research Center of High Efficiency and Precision Intelligent Manufacturing, Xiamen University of Technology

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Key Laboratory of Optoelectronic Chemical Materials and Devices (Ministry of Education), School of Optoelec-tronic Materials & Technology, Jianghan University

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Rheological and Optical Investigation of the Gelation and Phase Separation Behavior for PAN/DMSO/H2O System

DOI：10.14028/j.cnki.1003-3726.2016.09.015

摘要

Abstract

关键词

Keywords

references

Rheological and Optical Investigation of the Gelation and Phase Separation Behavior for PAN/DMSO/H₂O System