Journal
ADVANCED MATERIALS
Volume 34, Issue 2, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.202105299
Keywords
atomic oxygen resistance; double-layer nacre-inspired structures; mechanical stability; mica nanosheets; polyimide films
Categories
Funding
- National Natural Science Foundation of China [21975241, 51732011, 11525211, 11872063, 22005290]
- Foundation for Innovative Research Groups of the National Natural Science Foundation of China [21521001]
- Key Research Program of Frontier Sciences, CAS [QYZDJ-SSW-SLH036]
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDB22040402]
- University Synergy Innovation Program of Anhui Province [GXXT-2019-028]
- Science and Technology Major Project of Anhui Province [201903a05020003]
- Users with Excellence and Scientific Research Grant of Hefei Science Center of CAS [2015HSC-UE007]
- Anhui Provincial Natural Science Foundation [1808085ME115]
- Fundamental Research Funds for the Central Universities [WK2480000005, YD2070002007]
- Hefei Municipal Natural Science Foundation [2021024]
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This study has successfully developed a new PI-based nanocomposite film with excellent mechanical properties, AO resistance, ultraviolet, and high-temperature resistance. The double-layer nanocomposite film shows great potential in LEO and may serve as a crucial material in the aerospace field.
Owing to their outstanding comprehensive performance, polyimide (PI) composite films are widely used on the external surfaces of spacecraft to protect them from the adverse conditions of low Earth orbit (LEO). However, current PI composite films have inadequate mechanical properties and atomic oxygen (AO) resistance. Herein, this work fabricates a new PI-based nanocomposite film with greatly enhanced mechanical properties and AO resistance by integrating mica nanosheets with PI into a unique double-layer nacre-inspired structure with a much higher density of mica nanosheets in the top layer. In addition, the unique microstructure and the intrinsic properties of mica also impart the nanocomposite film with favorable ultraviolet and high-temperature resistance. The comprehensive performance of this material is superior to those of pure PI, single-layer PI-mica, and previously reported PI-based composite films. Thus, the double-layer nanocomposite film displays great potential as an aerospace material for use in LEO.
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