Articles & Issues
- Conflict of Interest
- In relation to this article, we declare that there is no conflict of interest.
-
This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits
unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Copyright © KIChE. All rights reserved.
All issues
메조페이스 핏치계 탄소섬유의 안정화
The Stabilization of Mesophase Pitch Based Carbon Fiber
HWAHAK KONGHAK, February 1991, 29(1), 89-96(8), NONE
Download PDF
Abstract
본 연구는 산화안정화가 메조페이스 핏치계 탄소섬유의 물성에 미치는 영향을 파악하기 위하여 수행되었다. 실험은 방사섬유를 230℃, 280℃, 320℃의 산화온도에서 0-3시간 동안 공기 분위기에서 안정화시켜 화학적, 광학적 관찰을 통해 산화제의 섬유 내부로의 침투 과정을 관찰하고, 탄화섬유의 기계적 물성값을 측정하여 산화안정화 조건을 도출코져 하였다. 메조페이스 핏치섬유가 산화안정화되는 과정은 섬유속으로 산소가 침투되고 탄소 및 수소가 탈리되면서 랜덤한 모자이크 조직이 섬유 표층으로부터 중심부 쪽으로 발달되는 skin-core구조를 가지면서 진행됨을 알 수 있었다. 안정화시 형성된 조직 특성은 탄화섬유의 단면조직을 제어하는 역할을 하며, 이는 섬유의 기계적 물성값에 큰 영향을 미친다는 것을 알 수 있었다. 안정화 시간, 온도, 도입된 산소량은 탄화섬유의 기계적 물성치를 변화시킴을 알 수 있었으며, 320℃에서 1시간 산화안정화하여 산소의 도입량이 8.9wt%인 안정화섬유를 탄화하였을 때가 인장강도 및 탄서율이 가장 우수한 탄소섬유를 제조할 수 있는 안정화 조건임을 알 수 있었다.
This study was performed to investigate the properties of mesophase pitch based carbon fibers during stabilization. The stabilization of those was carried out in the range of 230, 280, 320℃ under atmospheric condition for 0-3 hours. The characteristics of the reactions were observed by chemical and optical analysis. The condition of stabilization was determined by testing the mechanical properties of carbonized fibers. The stabilization of mesophase pitch based carbon fibers was progressed with permeating oxygens to fibers, escaping hydrogens and carbons from those. The skin-core structure, a random and mosaic structure is propgressed by oxidant from the surface of stabilized fibers to the center of those, was confirmed by using the polarized micrograph. The cross-sectional structure of carbonized fibers was controlled by the structure of stabilized fibers. The mechanical properties of carbonized fibers were determined using the stabilization time tempera-ture and the introduced oxygen contents. The tensile strength and Young’s modulus of carbonized fibers stabilized at 320℃ for 1 hour with 8.9wt% of oxygen contents were founded to be superier to others.
References
White JL, Sheaffer PM, 17th Biennial Conf. on Carbon, 161 (1987)
Steavens WC, Diefendrof RJ, Carbon, 86, 37 (1986)
Yokono T, Tanso, 125, 53 (1986)
Kowbel W, Don J, 18th Biennial Conf. on Carbon, 409 (1987)
Mochida I, J. Mater. Sci., 24, 389 (1989)
Park YD, Mochida I, Carbon, 26, 375 (1988)
Rhee B, 19th Biennial Conf. on Carbon, 212 (1989)
Yen IF, Edran JG, ACS Div. Petro. Chem., 262 (1962)
Mochida I, Korai Y, 高分子, 35, 456 (1986)
Ma AC, 19th Biennial Conf. on Carbon, 128 (1989)
Mochida I, 19th Biennial Conf. on Carbon, 126 (1989)
Mochida I, 18th Biennial Conf. on Carbon, 13 (1988)
Steavens WC, Diefendrof RJ, Carbon, 86, 37 (1986)
Yokono T, Tanso, 125, 53 (1986)
Kowbel W, Don J, 18th Biennial Conf. on Carbon, 409 (1987)
Mochida I, J. Mater. Sci., 24, 389 (1989)
Park YD, Mochida I, Carbon, 26, 375 (1988)
Rhee B, 19th Biennial Conf. on Carbon, 212 (1989)
Yen IF, Edran JG, ACS Div. Petro. Chem., 262 (1962)
Mochida I, Korai Y, 高分子, 35, 456 (1986)
Ma AC, 19th Biennial Conf. on Carbon, 128 (1989)
Mochida I, 19th Biennial Conf. on Carbon, 126 (1989)
Mochida I, 18th Biennial Conf. on Carbon, 13 (1988)
