Study on Thermally Conductive Carbon Fiber/Phthalonitrile Composites

Yan-min Pei; Yan Zhao; Jiang-nan Ding; Chao Zhou; Kun Zheng; Heng Zhou

doi:10.11777/j.issn1000-3304.2026.26038

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Study on Thermally Conductive Carbon Fiber/Phthalonitrile Composites

更新时间：2026-04-15

- Study on Thermally Conductive Carbon Fiber/Phthalonitrile Composites
- Acta Polymerica Sinica Pages: 1-10(2026)
- 作者机构：
  
  1.北京航空航天大学材料科学与工程学院北京 100191
  2.中国科学院化学研究所北京 100190
- 作者简介：
  
  Yan Zhao, E-mail: jennyzhaoyan@buaa.edu.cn
  Heng Zhou, E-mail: zhouheng@iccas.ac.cn
- 基金信息：
- DOI：10.11777/j.issn1000-3304.2026.26038
  CLC：
- CSTR：32057.14.GFZXB.2026.7593
- Received：04 February 2026，
  
  Accepted：25 March 2026，
  
  Online First：15 April 2026，
- 稿件说明：
移动端阅览
裴艳敏, 肇研, 丁江楠, 周超, 郑鲲, 周恒. 导热碳纤维/邻苯二甲腈复合材料研究. 高分子学报, doi: 10.11777/j.issn1000-3304.2026.26038.

Pei Y. M.; Zhao Y.; Ding J. N.; Zhou C.; Zheng K.; Zhou H. Study on thermally conductive carbon fiber/phthalonitrile composites. Acta Polymerica Sinica (in Chinese), doi: 10.11777/j.issn1000-3304.2026.26038.
裴艳敏, 肇研, 丁江楠, 周超, 郑鲲, 周恒. 导热碳纤维/邻苯二甲腈复合材料研究. 高分子学报, doi: 10.11777/j.issn1000-3304.2026.26038. DOI： CSTR： 32057.14.GFZXB.2026.7593.

Pei Y. M.; Zhao Y.; Ding J. N.; Zhou C.; Zheng K.; Zhou H. Study on thermally conductive carbon fiber/phthalonitrile composites. Acta Polymerica Sinica (in Chinese), doi: 10.11777/j.issn1000-3304.2026.26038. DOI： CSTR： 32057.14.GFZXB.2026.7593.

摘要

碳纤维增强邻苯二甲腈(CF/APN)复合材料厚度方向热导率较低，限制了其在高导热领域的应用. 为解决该问题，本研究首先采用反应诱导相分离法制备了平均粒径分别为25和200 μm的2种邻苯二甲腈树脂(APN)微球，然后在微球表面包覆少层石墨烯(FLG)制得APN25@FLG和APN200@FLG 2种粒子，将APN@FLG粒子作为导热增强相引入CF/APN复合材料体系中，并与直接添加FLG的改性方法进行对比，探究APN@FLG粒子对复合材料导热性能的调控作用及其对复合材料力学性能的影响. 结果表明，引入APN@FLG粒子的改性方案导热增强效果显著优于直接添加FLG的改性策略，APN@FLG粒子中的APN树脂微球可有效抑制FLG在成型压力作用下的面内取向行为，从而显著提升复合材料厚度方向的热导率. 当FLG的添加量为3.6 wt%时，APN200@FLG/CF/APN复合材料的厚度方向热导率达到1.62 W/(m·K)，相较于未改性的CF/APN复合材料提升了189%. 同时，引入APN@FLG粒子后复合材料层间剪切性能基本保持不变，仅当粒子添加量较大时，弯曲强度有所下降. 本研究为高性能导热复合材料设计与制备提供了高效可行的新策略.

Abstract

Carbon fiber-reinforced phthalonitrile (CF/APN) composites suffer from low through-thickness thermal conductivity

which limits their application in high thermal conductivity fields. To address this issue

in this work

two types of phthalonitrile resin (APN) microspheres with average particle sizes of 25 μm and 200 μm were first prepared via reaction-induced phase separation. Subsequently

few-layer graphene (FLG) was coated on the surface of the microspheres to obtain APN25@FLG and APN200@FLG core-shell particles. These APN@FLG particles were introduced into the CF/APN composite system as thermally conductive fillers

and their effects were compared with the direct addition of FLG. The regulation of core-shell particles on the thermal conductivity of composites and their influence on mechanical properties were systematically investigated. The results demonstrated that the modification strategy incorporating APN@FLG particles exhibited a significantly superior thermal conductivity enhancement effect over the direct addition of FLG. The APN resin microspheres in APN@FLG could effectively impede the in-plane orientation of FLG under molding pressure

thereby remarkably improving the through-thickness thermal conductivity of the composites. At an FLG loading of 3.6 wt%

the through-thickness thermal conductivity of the APN200@FLG/CF/APN composite reached 1.62 W/(m·K)

representing a 189% increase compared to the unmodified CF/APN composite. Meanwhile

the interlaminar shear properties of the composites remained largely unchanged after the introduction of APN@FLG particles

while the flexural strength decreased slightly only at relatively high particle loadings. This study provides an efficient and feasible novel strategy for the design and preparation of high-performance thermally conductive composites.

关键词

Keywords

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