通过多键协同作用引入“刚柔”结构的3D打印CF/PLA复合材料界面增强

IF 7.1 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composite Structures Pub Date : 2025-08-23 DOI:10.1016/j.compstruct.2025.119613

He Ou-Yang , Xuanyu Zhou , Yulong Zhang , Yan Wang , Ziqiang Zhu , Jianan Bai , Wei jiang , Yanan Zhang , Yubing Hu

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引用次数: 0

摘要

复合材料各组分之间的界面性能影响材料的整体性能。在此，我们提出了一种“刚柔”方法来改善3D打印CF/PLA复合材料相对较弱的层间特性。氧化石墨烯（GO）和聚乙烯亚胺（PEI）分别被选为“刚性”相和“柔性”相。采用逐步化学接枝技术在连续碳纤维（CCF）表面引入“刚柔”结构。随后，用改性CF和聚乳酸（PLA）制备长丝，并用FDM法得到样品。与纯CF/PLA相比，CF- pei - go /PLA复合材料的力学性能得到了显著提高。其中，界面抗剪强度（IFSS）提高了一倍（101.64%），抗冲击性能提高了74.50%。抗拉强度和抗折强度分别提高了31.17%和24.86%。通过SEM、AFM、XPS和拉曼等多种表征技术分析了界面增强机理。这项研究为高性能3d打印工程材料的开发提供了新的见解和方法。

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Interface enhancement of 3D printed CF/PLA composites by introducing “rigid-flexible” structures through multi-bond synergies

The interfacial properties between the components of a composite material influence the overall material properties. Herein, we proposed a “rigid-flexible” approach to improve the relatively weak interlaminar characteristic of 3D printed CF/PLA composite. Graphene oxide (GO) and polyethyleneimine (PEI) were chosen as the “rigid” and “flexible” phases, respectively. A stepwise chemical grafting technique was used to introduce “rigid-flexible” structures to the continuous carbon fiber (CCF) surface. Subsequently, filaments were prepared using modified CF and polylactic acid (PLA) and samples were obtained by FDM process. The CF-PEI-GO/PLA composites exhibited remarkable enhancements in mechanical performance relative to neat CF/PLA. Specifically, their interfacial shear strength (IFSS) doubled (101.64% increase), while impact resistance surged by 74.50%. Additionally, tensile strength and flexural strength showed substantial improvements of 31.17% and 24.86%, respectively. The interfacial enhancement mechanism was analyzed through a variety of characterization techniques such as SEM, AFM, XPS and Raman. This research offered new insights and methods towards the development of engineering materials for high performance 3d printing.

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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.