用于高温热管理的氟化PI-SiO2气凝胶：来自微纳分层孔隙的持续两疏性

IF 2.7 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Letters Pub Date : 2025-05-12 DOI:10.1016/j.matlet.2025.138732

Jiancheng Sun , Chi Zhang , Rubing Zhang

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引用次数: 0

摘要

尽管PI气凝胶的多孔结构具有高温热管理潜力，但由于其固有的水/油吸收性，它在实际应用中受到限制。制备了含氟烷基硅烷（FAS）和SiO2纳米颗粒的双层层状涂层，用于制备双疏相PI-SiO2气凝胶。优化后的材料具有优异的双拒水性(水接触角（WCA）： 157.4°，油接触角（OCA）： 110.3°，水滚角（WRA） <；3°)，耐油性高达150°C，具有优异的热弹性。通过协同微米/纳米SiO2组件，分层设计平衡了结构坚固性和低表面能，为航空燃料系统等极端环境提供变革性隔热。

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Fluorinated PI-SiO2 aerogels for high-temperature thermal management: Sustained amphiphobicity from micro-nano hierarchical porosity

Despite their porous structure enabling high temperature thermal management potential, PI aerogels face practical limitations due to inherent water/oil absorption. A dual-scale hierarchical coating integrating fluorinated alkyl silane (FAS) and SiO₂ nanoparticles is developed to engineer amphiphobic hybrid PI-SiO₂ aerogels. The optimized material achieves exceptional dual repellency (water contact angle (WCA): 157.4°, oil contact angle (OCA): 110.3°, water roll angle (WRA) < 3°) and maintains oil resistance up to 150 °C, demonstrating superior thermal resilience. By synergizing micron/nano SiO₂ components, the hierarchical design balances structural robustness and low surface energy, offering transformative thermal insulation for extreme environments like aerospace fuel systems.

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来源期刊

Materials Letters 工程技术-材料科学：综合

CiteScore

5.60

自引率

3.30%

发文量

1948

审稿时长

50 days

期刊介绍： Materials Letters has an open access mirror journal Materials Letters: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. Materials Letters is dedicated to publishing novel, cutting edge reports of broad interest to the materials community. The journal provides a forum for materials scientists and engineers, physicists, and chemists to rapidly communicate on the most important topics in the field of materials. Contributions include, but are not limited to, a variety of topics such as: • Materials - Metals and alloys, amorphous solids, ceramics, composites, polymers, semiconductors • Applications - Structural, opto-electronic, magnetic, medical, MEMS, sensors, smart • Characterization - Analytical, microscopy, scanning probes, nanoscopic, optical, electrical, magnetic, acoustic, spectroscopic, diffraction • Novel Materials - Micro and nanostructures (nanowires, nanotubes, nanoparticles), nanocomposites, thin films, superlattices, quantum dots. • Processing - Crystal growth, thin film processing, sol-gel processing, mechanical processing, assembly, nanocrystalline processing. • Properties - Mechanical, magnetic, optical, electrical, ferroelectric, thermal, interfacial, transport, thermodynamic • Synthesis - Quenching, solid state, solidification, solution synthesis, vapor deposition, high pressure, explosive