采用热重-差热分析仪研究了T700碳纤维/环氧树脂复合材料在氮气氛围、升温速率不同条件下的热解特性规律。结果表明:T700碳纤维/环氧树脂复合材料的热解反应只有一个阶段,且不同升温速率条件下复合材料热解的初始温度比较接近,终止温度随着升温速率的增加向高温方向移动;热解速率、质量变化速率随着升温速率的提高而增大。热解动力学分析表明,热解反应开始阶段复合材料的活化能相对较小,热解速度相对较快;随着转化率升高,表观活化能变大,材料热解速度降低。转化率为20%～60%时,表观活化能增值相差不大,材料的稳定性变化不大,随后复合材料表观活化能大幅增加,材料中的环氧树脂热解即将完成。采用Kissinger法、Flynn-Wall-Ozawa法计算T700碳纤维/环氧树脂复合材料的表观活化能,表观活化能平均值分别为134.64kJ/mol,150.47kJ/mol。
The pyrolysis characteristics of T700 carbon fiber/epoxy resin composites under nitrogen atmosphere and different heating rates were studied by TGA.The results showed that the pyrolysis reaction of T700 carbon fiber/epoxy resin composite had only one stage,the initial pyrolysis temperature of the composite was similar under different heating rates,and the termination temperature moved to high temperature with the increase of heating rate.The pyrolysis rate and mass change rate increased with the increase of heating rate.The pyrolysis kinetics analysis indicated that the activation energy of the composites was relatively small and the pyrolysis rate was relatively fast at the initial stage of the pyrolysis reaction.With the increase of conversion rate,the apparent activation energy increased and the pyrolysis rate decreased.When the conversion rate was 20% to 60%,there was little difference in the increase of apparent activation energy and little change in the stability of the material.Subsequently,the apparent activation energy of the composite material increased significantly,and the pyrolysis of the epoxy resin in the material was about to be completed.The apparent activation energies of carbon fiber/epoxy resin composites were calculated by Kissinger method and Flynn-Wall-Ozawa method,and the average values of apparent activation energy were 134.64kJ/mol and 150.47kJ/mol,respectively.
[1] 刘永强.解析航空航天领域碳纤维复合材料的实践应用[J].粘接,2019,40(7):69-71.
[2] 林德春,潘鼎,高健,等.碳纤维复合材料在航空航天领域的应用[J].玻璃钢,2007(1):18-27.
[3] 张登科,王光辉,方登科,等.碳纤维增强树脂基复合材料的应用研究进展[J].化工新型材料,2022,50(1):1-5.
[4] 张海燕,李根臣,刘震宇,等.国产T700级碳纤维及复合材料性能表征[J].化工新型材料,2020,48(4):238-240.
[5] 吴鹏.大型客机碳纤维环氧复合材料防火特性研究[D].沈阳:沈阳航空航天大学,2019.
[6] 张颖.碳纤维/环氧树脂复合材料热解动力学研究[D].沈阳:沈阳航空航天大学,2017.
[7] 李威,郭权锋.碳纤维复合材料在航天领域的应用[J].中国光学,2011,4(3):202-212.
[8] 王淑娟.碳纤维/环氧树脂复合材料的制备及性能研究[D].长春:吉林大学,2013.
[9] 崔兴志.碳纤维增强环氧树脂复合材料的制备及性能研究[D].青岛:中国海洋大学,2014.
[10] Maria W,DorotaO W,Weronika G,et al.Function alization effect on physico-mechanical properties of multiwalled carbon nanotubes/epoxy composites[J].Polymers for Advanced Technologies,2011,22:48-59.
[11] Kim M,Sung D H,Kong K H,et al.Characterization of resistive heating and themoelectric behavior of discontinuous carbon fiber-epoxy composites[J].Composites:Part B,2016,90:37-44.
[12] Saba N,Ahmad Safwan,Sanyang M L,et al.Thermal and dynamic mechanical properties of cellulose nanofibers reinforced epoxy composites[J].International Journal of Biological Macromolecules,2017,102:822-826.
[13] 陈新文,李晓骏,许凤和.碳纤维增强树脂基复合材料的热失重特性研究[J].航空材料学报,2000,20(3):125-133.
[14] 冯雅静.典型碳纤维环氧复合材料抗火焰烧穿特性研究[D].沈阳:沈阳航空航天大学,2018.
[15] 闵静雯.碳纤维/环氧树脂复合材料导热与隔声性能研究[D].哈尔滨:哈尔滨工程大学,2019.
[16] 刘振海.热分析与量热仪及其应用[M].第2版.北京:化学工业出版社,2011.
[17] 胡荣祖,史启祯.热分析动力学[M].第2版.北京:科学出版社,2008.
[18] 任宁,张建军.热分析动力学数据处理方法的研究进展[J].化学进展,2006,18(4):410-416.
[19] 计智,徐艳英,李金都,等.碳纤维/环氧复合材料的热解特性及动力学研究[J].消防科学与技术,2020,39(7):994-997.
[20] 黄川,杨洪涛,李翔宇,等.基辛格方程的研究与发展[J].火炸药学报,2014,37(1):26-30.
[21] 任宁,张建军.热分析动力学数据处理方法的研究进展[J].化学进展,2006,18(4):410-416.
PDF
