Highly Tear-Resistant Recyclable Carbon Fiber Reinforced Composites Relying on Woven Cross-Linked Polyurethanes

IF 9.1 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Nano Letters Pub Date : 2025-04-08 DOI:10.1021/acs.nanolett.5c0060610.1021/acs.nanolett.5c00606

Shunli Wang, Yinsheng Li and Limei Tian*,

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Abstract

The poor ductility and irreversible properties of covalently cross-linked polymers result in carbon fiber-reinforced polymer composites (CFRPs) with low tear resistance and nonrecyclability. In this work, a flexible woven polyurethane (WPPN_n) prepared via a woven cross-linker was used for the first time as a binder for CFRPs. WPPN₂₀₀₀ exhibited an ultrahigh strength of 50.4 MPa, a toughness of 267.2 MJ m^–3, and an excellent fracture energy (211.6 kJ m^–2). Simulation results and characterization tests confirmed the high energy dissipation of the woven network. The WPPN₂₀₀₀-CF composites achieved a tear resistance of 1004.5 kJ m^–2, which is 16.4 times higher than that of the epoxy-CF composites (61.2 kJ m^–2). In addition, due to the dynamic nature of the woven cross-linking, the carbon fiber can be recovered nondestructively using solvent. The woven cross-linking strategy provided new ideas for the design of carbon fiber adhesives.

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高抗撕裂可回收碳纤维增强复合材料依靠编织交联聚氨酯

共价交联聚合物的延展性和不可逆性能导致碳纤维增强聚合物复合材料（CFRPs）具有较低的抗撕裂性和不可回收性。本文首次将经机织交联剂制备的柔性机织聚氨酯（WPPNn）作为cfrp的粘结剂。WPPN2000的超高强度为50.4 MPa，韧性为267.2 MJ - m-3，断裂能为211.6 kJ - m-2。仿真结果和表征试验证实了编织网的高能量耗散。WPPN2000-CF复合材料的抗撕裂性能为1004.5 kJ - m-2，是环氧树脂- cf复合材料（61.2 kJ - m-2）的16.4倍。此外，由于编织交联的动态性质，可以使用溶剂对碳纤维进行无损回收。编织交联策略为碳纤维胶粘剂的设计提供了新的思路。

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来源期刊

Nano Letters 工程技术-材料科学：综合

CiteScore

16.80

自引率

2.80%

发文量

1182

审稿时长

1.4 months

期刊介绍： Nano Letters serves as a dynamic platform for promptly disseminating original results in fundamental, applied, and emerging research across all facets of nanoscience and nanotechnology. A pivotal criterion for inclusion within Nano Letters is the convergence of at least two different areas or disciplines, ensuring a rich interdisciplinary scope. The journal is dedicated to fostering exploration in diverse areas, including: - Experimental and theoretical findings on physical, chemical, and biological phenomena at the nanoscale - Synthesis, characterization, and processing of organic, inorganic, polymer, and hybrid nanomaterials through physical, chemical, and biological methodologies - Modeling and simulation of synthetic, assembly, and interaction processes - Realization of integrated nanostructures and nano-engineered devices exhibiting advanced performance - Applications of nanoscale materials in living and environmental systems Nano Letters is committed to advancing and showcasing groundbreaking research that intersects various domains, fostering innovation and collaboration in the ever-evolving field of nanoscience and nanotechnology.