Interlaminar shear properties of carbon fiber/nylon 6 composites reinforced with GO-modified waterborne polyurethane sizing agent prepared by in situ polymerization

IF 6.5 2区材料科学 Q1 CHEMISTRY, APPLIED

Progress in Organic Coatings Pub Date : 2024-11-04 DOI:10.1016/j.porgcoat.2024.108900

Mengxiang Liu , Mingke Xu , Jiaqi Zhou , Guodong Zhang , Jianan Ding , Pingxin Liu , Junwei Yu , Chengrui Di , Kun Qiao

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Abstract

To enhance the interfacial bonding of carbon fiber/nylon 6 thermoplastic composites, this study successfully grafted isophorone diisocyanate onto the surface of graphene oxide by leveraging the reactivity of isocyanate and hydroxyl groups. This modified graphene oxide was then grafted onto the waterborne polyurethane molecular chain via in-situ polymerization, resulting in a graphene oxide-modified waterborne polyurethane sizing agent. The study investigated the effect of graphene oxide content on the thermal properties and water resistance of the waterborne polyurethane materials, as well as the effect of graphene oxide content on the interlayer shear properties of carbon fiber nylon 6 composites prepared by graphene oxide modified waterborne polyurethane as sizing agent was also studied. Results showed that the thermal stability and water resistance of the waterborne polyurethane material were progressively enhanced with increasing graphene oxide content. Furthermore, at a graphene oxide content of 0.7 %, the interlaminar shear strength of carbon fiber/nylon 6 composites reached 65.0 MPa, which is 92.8 % higher than that of composites using commercial epoxy resin sizing agents. The enhancement mechanism of interlaminar shear strength was further analyzed, providing important theoretical guidance and a feasible strategy for developing high-performance sizing agents.

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用原位聚合法制备的 GO 改性水性聚氨酯施胶剂增强的碳纤维/尼龙 6 复合材料的层间剪切性能

为了增强碳纤维/尼龙 6 热塑性复合材料的界面粘合力，本研究利用异氰酸酯和羟基的反应活性，成功地将异佛尔酮二异氰酸酯接枝到氧化石墨烯表面。然后通过原位聚合将这种改性氧化石墨烯接枝到水性聚氨酯分子链上，从而得到了氧化石墨烯改性水性聚氨酯施胶剂。该研究考察了氧化石墨烯含量对水性聚氨酯材料热稳定性和耐水性的影响，还研究了氧化石墨烯含量对以氧化石墨烯改性水性聚氨酯为施胶剂制备的碳纤维尼龙 6 复合材料层间剪切性能的影响。结果表明，随着氧化石墨烯含量的增加，水性聚氨酯材料的热稳定性和耐水性逐渐增强。此外，当氧化石墨烯含量为 0.7 % 时，碳纤维/尼龙 6 复合材料的层间剪切强度达到 65.0 MPa，比使用商用环氧树脂施胶剂的复合材料高 92.8 %。进一步分析了层间剪切强度的增强机理，为开发高性能施胶剂提供了重要的理论指导和可行的策略。

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来源期刊

Progress in Organic Coatings 工程技术-材料科学：膜

CiteScore

11.40

自引率

15.20%

发文量

577

审稿时长

48 days

期刊介绍： The aim of this international journal is to analyse and publicise the progress and current state of knowledge in the field of organic coatings and related materials. The Editors and the Editorial Board members will solicit both review and research papers from academic and industrial scientists who are actively engaged in research and development or, in the case of review papers, have extensive experience in the subject to be reviewed. Unsolicited manuscripts will be accepted if they meet the journal''s requirements. The journal publishes papers dealing with such subjects as: • Chemical, physical and technological properties of organic coatings and related materials • Problems and methods of preparation, manufacture and application of these materials • Performance, testing and analysis.