Water-based PES-NaPSS sizing agent without surfactant for interface enhancement of CF/PEEK composites

IF 8.3 1区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Science and Technology Pub Date : 2024-10-01 DOI:10.1016/j.compscitech.2024.110892

Kaixuan Lei , Wenzhen Qin , Shulin Bai , Jianfan Cao , Liang Chen

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Abstract

Improving the weak interfacial bonding of carbon fiber (CF)/polyetheretherketone (PEEK) composites is an extremely urgent need. Addressing this issue, sizing modification on CF surfaces is a conventional and effective method. In this work, polyethersulfone-polystyrene sulfonate sodium (PES-NaPSS) was successfully synthesized by UV illumination. A novel surfactant-free aqueous PES-NaPSS sizing agent was prepared by emulsion/solvent evaporation method to regulate the interface of CF/PEEK composites. From the XPS and SEM results, it can be seen that PES-NaPSS was uniformly coated on the CF surfaces, which introduced the reactive groups on the CF surfaces. The PES-NaPSS sizing agent exhibits good thermal performance and storage stability, meeting the needs for high temperature processing of CF/PEEK composites. Compared with the unsized CF/PEEK composites, the ILSS, flexural strength and modulus of the 0.9 wt% PES-NaPSS modified CF/PEEK composite are improved by 32.8 %, 40.3 % and 37.4 %, respectively. Accordingly, the mechanisms of the interface improvement are physical riveting, chain entanglement, chemical and physical interactions between the PES-NaPSS and PEEK matrix. This green and effective method of interface improvement will supply a prerequisite for the extensive application of CF/PEEK composites.

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用于增强 CF/PEEK 复合材料界面的不含表面活性剂的水基 PES-NaPSS 施胶剂

改善碳纤维（CF）/聚醚醚酮（PEEK）复合材料的弱界面结合是一项极为迫切的需求。为解决这一问题，对 CF 表面进行施胶改性是一种传统而有效的方法。在这项工作中，通过紫外线照射成功合成了聚醚砜-聚苯乙烯磺酸钠（PES-NaPSS）。利用乳液/溶剂蒸发法制备了一种新型的无表面活性剂水性 PES-NaPSS 施胶剂，用于调节 CF/PEEK 复合材料的界面。从 XPS 和 SEM 结果可以看出，PES-NaPSS 均匀地涂覆在 CF 表面，在 CF 表面引入了活性基团。PES-NaPSS 施胶剂具有良好的热性能和储存稳定性，可满足 CF/PEEK 复合材料高温加工的需要。与未施胶的 CF/PEEK 复合材料相比，0.9 wt% PES-NaPSS 改性 CF/PEEK 复合材料的 ILSS、弯曲强度和模量分别提高了 32.8%、40.3% 和 37.4%。因此，界面改善的机理是 PES-NaPSS 与 PEEK 基体之间的物理铆接、链缠结、化学和物理相互作用。这种绿色、有效的界面改善方法将为 CF/PEEK 复合材料的广泛应用提供先决条件。

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来源期刊

Composites Science and Technology 工程技术-材料科学：复合

CiteScore

16.20

自引率

9.90%

发文量

611

审稿时长

33 days

期刊介绍： Composites Science and Technology publishes refereed original articles on the fundamental and applied science of engineering composites. The focus of this journal is on polymeric matrix composites with reinforcements/fillers ranging from nano- to macro-scale. CSTE encourages manuscripts reporting unique, innovative contributions to the physics, chemistry, materials science and applied mechanics aspects of advanced composites. Besides traditional fiber reinforced composites, novel composites with significant potential for engineering applications are encouraged.