Super-elasticity at 4 K of covalently crosslinked polyimide aerogels with negative Poisson’s ratio

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dc.citation.articleNumber4092
dc.citation.journalTitleNature Communications
dc.citation.volumeNumber12
dc.contributor.authorCheng, Yang
dc.contributor.authorZhang, Xiang
dc.contributor.authorQin, Yixiu
dc.contributor.authorDong, Pei
dc.contributor.authorYao, Wei
dc.contributor.authorMatz, John
dc.contributor.authorAjayan, Pulickel M.
dc.contributor.authorShen, Jianfeng
dc.contributor.authorYe, Mingxin
dc.date.accessioned2021-07-15T21:23:52Z
dc.date.available2021-07-15T21:23:52Z
dc.date.issued2021
dc.description.abstractThe deep cryogenic temperatures encountered in aerospace present significant challenges for the performance of elastic materials in spacecraft and related apparatus. Reported elastic carbon or ceramic aerogels overcome the low-temperature brittleness in conventional elastic polymers. However, complicated fabrication process and high costs greatly limited their applications. In this work, super-elasticity at a deep cryogenic temperature of covalently crosslinked polyimide (PI) aerogels is achieved based on scalable and low-cost directional dimethyl sulfoxide crystals assisted freeze gelation and freeze-drying strategy. The covalently crosslinked chemical structure, cellular architecture, negative Poisson’s ratio (−0.2), low volume shrinkage (3.1%), and ultralow density (6.1 mg/cm3) endow the PI aerogels with an elastic compressive strain up to 99% even in liquid helium (4 K), almost zero loss of resilience after dramatic thermal shocks (∆T = 569 K), and fatigue resistance over 5000 times compressive cycles. This work provides a new pathway for constructing polymer-based materials with super-elasticity at deep cryogenic temperature, demonstrating much promise for extensive applications in ongoing and near-future aerospace exploration.
dc.identifier.citationCheng, Yang, Zhang, Xiang, Qin, Yixiu, et al.. "Super-elasticity at 4 K of covalently crosslinked polyimide aerogels with negative Poisson’s ratio." <i>Nature Communications,</i> 12, (2021) Springer Nature: https://doi.org/10.1038/s41467-021-24388-y.
dc.identifier.digitals41467-021-24388-y
dc.identifier.doihttps://doi.org/10.1038/s41467-021-24388-y
dc.identifier.urihttps://hdl.handle.net/1911/111027
dc.language.isoeng
dc.publisherSpringer Nature
dc.rightsThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder.
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.titleSuper-elasticity at 4 K of covalently crosslinked polyimide aerogels with negative Poisson’s ratio
dc.typeJournal article
dc.type.dcmiText
dc.type.publicationpublisher version
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