超支化聚酰亚胺上浆剂对碳纤维增强聚醚醚酮复合材料力学性能的影响

doi:10.19936/j.cnki.2096-8000.20241128.012

复合材料科学与工程 ›› 2024, Vol. 0 ›› Issue (11): 88-91.DOI: 10.19936/j.cnki.2096-8000.20241128.012

超支化聚酰亚胺上浆剂对碳纤维增强聚醚醚酮复合材料力学性能的影响

朱敏杰¹, 魏陇沙², 孔文锋¹, 晏义伍^1*

1.深圳航天科技创新研究院广东省先进聚合物复合材料工程技术研究中心,深圳 518101;
2.深圳航天科技创新研究院深圳市复合材料重点实验室,深圳 518101

收稿日期:2023-07-27 出版日期:2024-11-28 发布日期:2025-01-14
通讯作者: 晏义伍(1980—),男,博士,研究员,主要从事复合材料方面的研究,yanyiwuhit@126.com。
作者简介:朱敏杰(1993—),男,硕士研究生,主要从事复合材料方面的研究。
基金资助:
中央引导地方科技发展资金项目(2021Szvup086)

Effect of hyperbranched polyimide sizing agent on mechanical properties of carbon fiber reinforced poly(ether-ether-ketone)

ZHU Minjie¹, WEI Longsha², KONG Wenfeng², YAN Yiwu^1*

1. Guangdong Advanced Polymer Composite Engineering Technology Research Center, Shenzhen Academy of Aerospace Technology, Shenzhen 518101, China;
2. Shenzhen Key Laboratory of Composite Materials, Shenzhen Academy of Aerospace Technology, Shenzhen 518101, China

Received:2023-07-27 Online:2024-11-28 Published:2025-01-14

摘要/Abstract

摘要： 聚醚醚酮(PEEK)性能优异,但是由于其分子链段呈惰性,在与碳纤维复合时无法形成化学键相互作用,导致界面强度较低。针对该问题,首先通过两步法制备得到超支化聚酰亚胺,随后利用化学接枝方法对碳纤维表面进行超支化聚酰亚胺的上浆改性处理,再将其与PEEK制备得到碳纤维增强PEEK复合材料,采用表面形貌、表面能、层间剪切强度、断面形貌等方法研究了上浆改性对复合材料性能的影响。结果表明:在超支化聚酰亚胺上浆后,碳纤维表面粗糙度提高,表面能提升至48.0 mN/m,并且表面能中的极性分量下降,表示其与非极性树脂的浸润性提升;与未改性前相比,改性后碳纤维增强PEEK复合材料的层间剪切强度和拉伸强度分别提高了52.4%、39.8%。

关键词: 碳纤维, 复合材料, 聚醚醚酮, 聚酰胺, 上浆, 改性

Abstract: Poly(ether-ether-ketone) (PEEK) has excellent properties, but there is a low interface strength between carbon fiber (CF) and PEEK due to the inert PEEK chains and the difficulty of forming the chemical bond with CF. To solve this problem, hyperbranched polyimide sizing agent was used to improve the interfacial properties of the composite. Firstly, hyperbranched polyimide was prepared by two-step method, and then the surface of carbon fiber was modified by sizing with hyperbranched polyimide by chemical grafting. The experimental results show that after sizing with hyperbranched polyimide, the surface roughness of carbon fiber increases. And the surface energy is increased to 48.0 mN/m, while the polar component of surface energy is decreased, indicating that its wettability with non-polar resin is improved. Moreover, the interlaminar shear strength and tensile strength of the modified carbon fiber reinforced PEEK composites have been increased by 52.4% and 39.8%, respectively, compared to the unmodified ones.

Key words: carbon fiber, composite, PEEK, PI, sizing, modification

中图分类号:

TB332

朱敏杰, 魏陇沙, 孔文锋, 晏义伍. 超支化聚酰亚胺上浆剂对碳纤维增强聚醚醚酮复合材料力学性能的影响[J]. 复合材料科学与工程, 2024, 0(11): 88-91.

ZHU Minjie, WEI Longsha, KONG Wenfeng, YAN Yiwu. Effect of hyperbranched polyimide sizing agent on mechanical properties of carbon fiber reinforced poly(ether-ether-ketone)[J]. COMPOSITES SCIENCE AND ENGINEERING, 2024, 0(11): 88-91.

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超支化聚酰亚胺上浆剂对碳纤维增强聚醚醚酮复合材料力学性能的影响

Effect of hyperbranched polyimide sizing agent on mechanical properties of carbon fiber reinforced poly(ether-ether-ketone)

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