Degradation of Carbon Fiber-reinforced Polymer Using Supercritical Fluids
Degradation of Carbon Fiber-reinforced Polymer Using Supercritical Fluids
复制标题
使用超临界流体降解碳纤维增强聚合物
DOI：
10.1007/s12221-017-1151-4
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发表时间：
2017-04-01
影响因子：
2.5
通讯作者：
Jing, Deqi
中科院分区：
文献类型：
--
作者：
Cheng, Huanbo;Huang, Haihong;Jing, Deqi
从反应温度和反应时间对降解速率的影响出发，分析了不同超临界流体对碳纤维增强聚合物(CFRP)的降解能力；基于液相产物分析，考察了超临界流体中CFRP中交联网络发生的断链反应；并对超临界正丁醇和正丙醇作用下的再生碳纤维进行了表征。结果表明，超临界正丁醇对CFRP的降解能力最好，其次是超临界丙酮。在280~340℃的温度范围内，超临界乙醇和正丙醇对CFRP的降解能力相差不大，而在340~360℃的温度范围内，超临界正丙醇的降解能力优于乙醇，超临界甲醇和异丙醇不利于CFRP的降解。在环氧树脂固化体系中，线性链段的C-C、C-O和-O-键断裂，以及交联段的C-N键断裂，生成的液相产物主要是苯衍生物和苯酚衍生物。与原碳纤维相比，再生碳纤维表面氮、氧、硅含量降低，碳含量增加，拉伸强度保持在原碳纤维的98%以上。
The degradation capability of the different supercritical fluids on carbon fiber-reinforced polymer (CFRP) was analyzed based on the impact of reaction temperature and time on degradation rate; the chain scission reaction of cross-linked network in CFRP occurred in supercritical fluid was investigated based on the analysis of liquid phase products; and the recycled carbon fiber under supercritical n-butanol and n-propanol were characterized. The results indicated that supercritical n-butanol had the excellent degradation capability on CFRP, followed by supercritical acetone. The degradation capability of supercritical ethanol and n-propanol on CFRP had little difference in temperature ranged from 280 °C to 340 °C, while supercritical n-propanol was superior to ethanol under the temperature ranged from 340 °C to 360 °C. The supercritical methanol and isopropanol were disadvantageous to CFRP degradation. The liquid phase products were main the benzene derivatives and phenol derivatives by the scission of C-C, C-O and -O- bond in linear chain segment, as well as that of C-N bond in cross-linked segment of epoxy resin cure system. In comparison with the original carbon fiber, the content of N, O and Si from the recycled carbon fiber surface decreased, while the content of C increased, and the tension strength can retain above 98 % of that of the original carbon fiber.