PDA-rGO modified epoxy/hydrogel microsphere composite coatings for fast ablation and surface temperature control via triple locking water strategy

IF 7.3 2区材料科学 Q1 CHEMISTRY, APPLIED

Progress in Organic Coatings Pub Date : 2025-09-05 DOI:10.1016/j.porgcoat.2025.109636

Zibo Xu, Tianwen Dai, Xiang Wang, Yang Chen, Pengbo Liu, Huawei Zou

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引用次数: 0

Abstract

Owing to its superior mechanical and process performance, epoxy is widely used as coating material. However, its high surface temperature during ablation limits its potential for infrared stealth application. This study aims to achieve rapid ablation and effective surface temperature regulation under high-temperature conditions. Here, we introduced polydopamine (PDA)-modified graphene oxide (PDA-rGO) and GO coated hydrogel microspheres (GO@HMPs) into epoxy (TETGE) matrix to prepare TETGE/PDA-rGO/GO@HMPs (TPG/GO@HMPs) composites, which were proved to have excellent anti-dehydration performance, fast ablation ability and surface temperature regulation. The anti-dehydration performances of the composites were enhanced through triple locking water strategy. For the TPG/GO@HMPs (30/70) system, after an 80-hour dehydration test, the water loss rate decreased to 25.6 %, and further to 10.3 % with 6 M LiCl doping. Subsequent oxygen-acetylene ablation tests demonstrated that the introduction of GO@HMPs significantly accelerated the ablation process of the material: compared to the TPG system, the mass ablation rate of the TPG/GO@HMPs (30/70) system increased from 0.08 g/s to 0.14 g/s, and the linear ablation rate improved from 0.17 mm/s to 0.25 mm/s. Moreover, for the TPG/GO@HMPs (30/70) system, its final surface temperature after 30 s ablation decreased from 1068 °C to 564 °C, and the infrared radiant energy was reduced to 3 × 10⁴ W/m², which was about 80 % lower than that of pure epoxy resin. These results indicated that the TETGE/PDA-rGO/GO@HMPs composites would have promising applications in the fields of surface temperature control and infrared stealth of high-speed aircrafts.

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PDA-rGO改性环氧/水凝胶微球复合涂层，用于快速烧蚀和通过三重锁水策略控制表面温度

环氧树脂由于其优异的机械性能和工艺性能，被广泛用作涂料。然而，其烧蚀时的高表面温度限制了其红外隐身应用的潜力。本研究旨在实现高温条件下的快速烧蚀和有效的表面温度调节。本研究将聚多巴胺（PDA）修饰的氧化石墨烯（PDA- rgo）和氧化石墨烯包覆的水凝胶微球（GO@HMPs）引入到环氧树脂（TETGE）基体中，制备了TETGE/PDA- rgo /GO@HMPs （TPG/GO@HMPs）复合材料，该复合材料具有优异的抗脱水性能、快速烧蚀能力和表面温度调节能力。通过三锁水策略提高了复合材料的抗脱水性能。对于TPG/GO@HMPs（30/70）体系，经过80小时的脱水试验，失水率降至25.6%，掺杂6 M LiCl后，失水率降至10.3%。随后的氧-乙炔烧蚀试验表明，GO@HMPs的引入显著加快了材料的烧蚀过程：与TPG体系相比，TPG/GO@HMPs（30/70）体系的质量烧蚀速率从0.08 g/s提高到0.14 g/s，线性烧蚀速率从0.17 mm/s提高到0.25 mm/s。此外，对于TPG/GO@HMPs（30/70）体系，经过30 s烧蚀后，其最终表面温度从1068℃降至564℃，红外辐射能量降至3 × 104 W/m2，比纯环氧树脂低约80%。这些结果表明，TETGE/PDA-rGO/GO@HMPs复合材料在高速飞机表面温度控制和红外隐身等领域具有广阔的应用前景。

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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.