Rapid stabilization of pitch fiber precursor by multi-step thermal oxidation

碳化 纤维 材料科学 差示扫描量热法 复合材料 极限抗拉强度 等温过程 吸热过程 微观结构 两步走 扫描电子显微镜 吸附 化学 有机化学 物理 热力学 组合化学
作者
Jun Ichiro Hayashi,Makoto Nakashima,Katsuki Kusakabe,Shigeharu Morooka,Susumu Mitsuda
出处
期刊:Carbon [Elsevier BV]
卷期号:33 (11): 1567-1571 被引量:20
标识
DOI:10.1016/0008-6223(95)00118-w
摘要

A multi-step oxidation procedure was developed to stabilize an isotropic pitch fiber prior to carbonization. In the first step, the temperature was raised to 170–220 °C in 1 minute and kept isothermally for 4 minutes. The temperature was then increased in the same manner to 250, 300 and 350 °C. Stabilized fiber precursors were finally carbonized at 1000 °C. The three-step oxidation of 220–250–300 °C required only 15 minutes and stabilized the pitch fiber without fusion. However, the tensile strength of the resultant carbon fiber was 70% of that of the carbon fiber stabilized by a conventional slow heating method (2.5 °C/min to 360 °C). The four-step oxidation, taking 20 minutes in total, was more effective. The tensile strength of the carbon fiber was 82 and 88% by procedures of 220–250–300–300 °C and 220–250–300–350 °C, respectively. Oxidized fibers were characterized by differential scanning calorimetry (DSC) in a nitrogen atmosphere. The three-step oxidation of 220–250–300 °C decreased the heat capacity of the fiber but did not completely stabilize the microstructure of the fiber. The four-step oxidation up to 350 °C, however, diminished the endothermic peak in the DSC profile seen with fibers oxidized by the three-step procedure. The DSC profile of the fiber prepared by the four-step oxidation was very close to that prepared by the slow heating method.

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
PDF的下载单位、IP信息已删除 (2025-6-4)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
NIKI完成签到 ,获得积分10
刚刚
叽歪提发布了新的文献求助10
刚刚
独指蜗牛完成签到 ,获得积分10
刚刚
菜菜求带完成签到 ,获得积分10
1秒前
小满吖关注了科研通微信公众号
3秒前
量子星尘发布了新的文献求助10
3秒前
3秒前
阳枝甘禄完成签到,获得积分10
5秒前
mellow发布了新的文献求助10
5秒前
凤梨发布了新的文献求助10
6秒前
6秒前
wuyu完成签到 ,获得积分10
6秒前
小蘑菇应助光亮的天真采纳,获得10
9秒前
迷途羔羊完成签到 ,获得积分10
10秒前
李振博发布了新的文献求助10
12秒前
FF完成签到 ,获得积分10
13秒前
14秒前
15秒前
15秒前
17秒前
19秒前
20秒前
万能图书馆应助lch采纳,获得30
21秒前
追寻的语雪完成签到,获得积分10
22秒前
多喝水发布了新的文献求助20
22秒前
巧稚一生完成签到 ,获得积分10
22秒前
ABCDE完成签到,获得积分10
23秒前
叫我魔王大人完成签到,获得积分10
23秒前
在水一方应助腼腆的猎豹采纳,获得30
25秒前
和花花发布了新的文献求助10
27秒前
猪猪hero应助卜婉君采纳,获得10
27秒前
小满吖发布了新的文献求助10
28秒前
29秒前
29秒前
科研通AI2S应助SteveRogers采纳,获得10
29秒前
kingcoming发布了新的文献求助10
30秒前
hzwdm1完成签到,获得积分10
31秒前
Akim应助Aurora采纳,获得10
32秒前
chensongyu发布了新的文献求助10
32秒前
听听发布了新的文献求助10
34秒前
高分求助中
The Mother of All Tableaux Order, Equivalence, and Geometry in the Large-scale Structure of Optimality Theory 2400
Ophthalmic Equipment Market by Devices(surgical: vitreorentinal,IOLs,OVDs,contact lens,RGP lens,backflush,diagnostic&monitoring:OCT,actorefractor,keratometer,tonometer,ophthalmoscpe,OVD), End User,Buying Criteria-Global Forecast to2029 2000
A new approach to the extrapolation of accelerated life test data 1000
Cognitive Neuroscience: The Biology of the Mind 1000
Cognitive Neuroscience: The Biology of the Mind (Sixth Edition) 1000
Optimal Transport: A Comprehensive Introduction to Modeling, Analysis, Simulation, Applications 800
Official Methods of Analysis of AOAC INTERNATIONAL 600
热门求助领域 (近24小时)
化学 材料科学 医学 生物 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 遗传学 基因 物理化学 催化作用 冶金 细胞生物学 免疫学
热门帖子
关注 科研通微信公众号,转发送积分 3959759
求助须知:如何正确求助?哪些是违规求助? 3506016
关于积分的说明 11127457
捐赠科研通 3237969
什么是DOI,文献DOI怎么找? 1789411
邀请新用户注册赠送积分活动 871741
科研通“疑难数据库(出版商)”最低求助积分说明 803019