Nb2CTx MXene/starch hybrid aerogels supported flame-retardant phase change composites with superior solar-thermal conversion efficiency and outstanding electromagnetic interference shielding

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing Pub Date : 2025-03-07 DOI:10.1016/j.compositesa.2025.108854

Yuwei Liu , Jiayi Tang , Jiuao Wang , Hao Yue , Zongliang Du , Xu Cheng , Haibo Wang , Xiaosheng Du

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Abstract

The development of form-stable phase change materials (PCMs) that combine solar-thermal storage capacity, electromagnetic interference (EMI) shielding performance, and flame-retardancy is crucial for effective building energy management and conservation. Herein, innovative Nb₂CT_x MXene/starch hybrid aerogels supported phase change composites (MSPCMs) with superior solar-thermal conversion efficiency, EMI shielding and flame-retardancy were fabricated by selectively etching of Nb₂AlC MAX, modifying starch with sodium phytate, constructing MXene/starch hybrid aerogels (MSPAs), and impregnating aerogels with molten n-eicosane. Differential scanning calorimetry (DSC) analyses revealed that MSPCMs exhibited high PCM loading yield (up to 498.9 %) and heat storage density (up to 232.1 J/g). Nb₂CT_x MXene nanosheets significantly enhanced the solar-thermal storage efficiency (up to 87.9 %) and EMI shielding performance of MSPCMs. Additionally, increasing the content of sodium phytate in MSPAs noticeably reduced the peak heat release rate (pHRR) and the total heat release (THR) of MSPCMs, thereby improving the flame-retardant properties of the synthesized PCM composites.

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Nb2CTx MXene/淀粉杂化气凝胶支撑的阻燃相变复合材料具有优异的光热转换效率和出色的电磁干扰屏蔽性能

结合太阳能储热能力、电磁干扰（EMI）屏蔽性能和阻燃性的形式稳定相变材料（PCMs）的发展对于有效的建筑能源管理和节约至关重要。本文通过选择性蚀刻nb2alcmax、植酸钠改性淀粉、构建MXene/淀粉混合气凝胶（MSPAs）、熔融正二十烷浸渍气凝胶，制备了具有优异光热转换效率、屏蔽电磁干扰和阻燃性能的新型Nb2CTx MXene/淀粉复合气凝胶负载相变复合材料（MSPCMs）。差示扫描量热法（DSC）分析表明，MSPCMs具有较高的PCM加载率（高达498.9%）和储热密度（高达232.1 J/g）。Nb2CTx MXene纳米片显著提高了MSPCMs的太阳能蓄热效率（高达87.9%）和电磁干扰屏蔽性能。此外，增加植酸钠在mspms中的含量可显著降低mspms的峰值放热率（pHRR）和总放热率（THR），从而提高合成的PCM复合材料的阻燃性能。

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来源期刊

Composites Part A: Applied Science and Manufacturing 工程技术-材料科学：复合

CiteScore

15.20

自引率

5.70%

发文量

492

审稿时长

30 days

期刊介绍： Composites Part A: Applied Science and Manufacturing is a comprehensive journal that publishes original research papers, review articles, case studies, short communications, and letters covering various aspects of composite materials science and technology. This includes fibrous and particulate reinforcements in polymeric, metallic, and ceramic matrices, as well as 'natural' composites like wood and biological materials. The journal addresses topics such as properties, design, and manufacture of reinforcing fibers and particles, novel architectures and concepts, multifunctional composites, advancements in fabrication and processing, manufacturing science, process modeling, experimental mechanics, microstructural characterization, interfaces, prediction and measurement of mechanical, physical, and chemical behavior, and performance in service. Additionally, articles on economic and commercial aspects, design, and case studies are welcomed. All submissions undergo rigorous peer review to ensure they contribute significantly and innovatively, maintaining high standards for content and presentation. The editorial team aims to expedite the review process for prompt publication.