一种热绝缘三氧化钼-二氧化钼异质结 / 聚酰亚胺复合气凝胶及其制备方法
By constructing a multi-scale structural design of molybdenum trioxide-molybdenum dioxide heterojunction and polyimide aerogel, and combining hydrothermal method and cryogenic assembly technology, the problem of high thermal conductivity of polymer aerogel was solved, and a composite material with ultra-low thermal conductivity and excellent thermal insulation performance was realized.
CN121571066BActive Publication Date: 2026-07-17JIANGNAN UNIV
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Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- JIANGNAN UNIV
- Filing Date
- 2025-12-17
- Publication Date
- 2026-07-17
AI Technical Summary
Technical Problem
The high thermal conductivity of existing polymer aerogels limits their application in the field of thermal insulation materials.
Method used
By constructing a multi-scale structure of molybdenum trioxide-molybdenum dioxide heterojunction and polyimide aerogel, and combining hydrothermal synthesis, interface engineering and strong temperature gradient driven freeze assembly technology, a composite material with a layered microstructure and multiple phonon scattering interfaces is formed.
Benefits of technology
It achieves ultra-low thermal conductivity, with an axial thermal conductivity of 9.05 mW/(m K) and a radial thermal conductivity of 104.1 mW/(m K) at room temperature, and an anisotropy ratio of approximately 12, significantly improving thermal insulation performance.
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Abstract
本发明公开了一种热绝缘三氧化钼‑二氧化钼异质结 / 聚酰亚胺气凝胶复合材料及其制备方法。利用水热反应精准合成具有特定长宽比的三氧化钼纳米带；通过界面工程实现三氧化钼‑二氧化钼异质结的可控生长，形成具有能带匹配特性的异质界面；随后将三氧化钼‑二氧化钼异质结与聚酰胺酸复合，通过强温度梯度驱动冷冻组装法、冷冻干燥技术制备具有层状结构的复合气凝胶。通过构筑三氧化钼‑二氧化钼异质结界面、有机‑无机杂化界面以及气‑固多孔界面的三重协同声子散射网络，有效提高声子散射，降低热导率。此发明不仅突破了传统隔热材料的性能瓶颈，更为极端环境下的高效热管理提供了全新的解决方案。
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