通过调节聚芳醚酮界面粘合剂的分子量来增强CF/PEEK复合材料的浸渍行为和界面键合

IF 6.3 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composite Structures Pub Date : 2025-03-22 DOI:10.1016/j.compstruct.2025.119107

Jinze Cui , Xiyan Li , Yutai Luo, Simin Zhang, Feng Bao, Jiali Yu, Huichao Liu, Caizhen Zhu, Jian Xu

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引用次数: 0

摘要

提高CF/PEEK复合材料力学性能的主要障碍是界面结合强度不足和浸渍性能差。本研究通过开发一种高度耐热和易溶的聚芳醚酮（PFEEK）界面粘合剂以及一种切碎超薄CF带的加工技术来解决这一问题。结果表明，CF/PEEK-2复合材料（Mw: 12000 g/mol）的力学性能最佳，层间剪切强度（ILSS）、抗拉强度、抗拉模量、抗拉韧性、抗弯强度和抗弯模量分别为86.0 MPa、772.9 MPa、50.2 GPa、13.5 MJ/m3、878.5 MPa和47.8 GPa，这主要归功于CF束和PEEK基体优异的浸渍性能和润湿性。因此，耐热(Tg >；250°C;Td5%祝辞485°C)和分流式PFEEK粘结剂将为高端CF/PEEK复合材料的进一步大规模应用提供重要指导。

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Enhanced impregnation behavior and interfacial bonding of CF/PEEK composites by regulating molecular weight of poly (aryl ether ketone) interfacial binder

The primary obstacle to enhancing the mechanical performance of CF/PEEK composites is the insufficient interfacial bonding strength and poor impregnation properties. The present study addresses this issue by focusing on the development of a highly heat-resistant and easily soluble poly (aryl ether ketone) (PFEEK) interfacial binder as well as a processing technology for chopped ultra-thin CF tapes. As a result, the CF/PEEK-2 composites (Mw: 12000 g/mol) exhibited optimal mechanical performance with interlaminar shear strength (ILSS), tensile strength, tensile modulus, tensile toughness, flexural strength, and flexural modulus of 86.0 MPa, 772.9 MPa, 50.2 GPa, 13.5 MJ/m³, 878.5 MPa, and 47.8 GPa, respectively, which can be attributed to the excellent impregnation properties and wettability of the CF bundles and PEEK matrix. Therefore, a heat-resistant (T_g > 250°C; T_d5% > 485°C) and diffluent PFEEK binder will provide crucial guidance for further large-scale applications of high-end CF/PEEK composites.

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来源期刊

Composite Structures 工程技术-材料科学：复合

CiteScore

12.00

自引率

12.70%

发文量

1246

审稿时长

78 days

期刊介绍： The past few decades have seen outstanding advances in the use of composite materials in structural applications. There can be little doubt that, within engineering circles, composites have revolutionised traditional design concepts and made possible an unparalleled range of new and exciting possibilities as viable materials for construction. Composite Structures, an International Journal, disseminates knowledge between users, manufacturers, designers and researchers involved in structures or structural components manufactured using composite materials. The journal publishes papers which contribute to knowledge in the use of composite materials in engineering structures. Papers deal with design, research and development studies, experimental investigations, theoretical analysis and fabrication techniques relevant to the application of composites in load-bearing components for assemblies, ranging from individual components such as plates and shells to complete composite structures.