Strong acoustic meta-aerogels enabled by nanoconfined directional freezing and in-situ polymerization.

Junkai Wang, Zhangyu Wu, Weichun Huang, Ao Zhou, Jingbo Zhuo, Yonghua Yu, Changwen Miao, Ming-Hui Lu, Wei She

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Article in Nature communications, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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5 · Who and what money

Authors and funding

9 authors.

Junkai Wang *State Key Laboratory of Engineering Materials for Major Infrastructure, School of Materials Science and Engineering, Southeast University, Nanjing, 211189, China.

Zhangyu Wu *State Key Laboratory of Engineering Materials for Major Infrastructure, School of Materials Science and Engineering, Southeast University, Nanjing, 211189, China. wuzy@seu.edu.cn.ORCID http://orcid.org/0000-0002-1003-4517

Weichun Huang *National Laboratory of Solid State Microstructures & School of Advanced Manufacturing Engineering, Nanjing University, Suzhou, 215163, China.ORCID http://orcid.org/0000-0002-7137-4726

Ao ZhouGuangdong Provincial Key Laboratory of Intelligent and Resilient Structures for Civil Engineering, Harbin Institute of Technology, Shenzhen, 518055, China.

Jingbo ZhuoGuangdong Provincial Key Laboratory of Intelligent and Resilient Structures for Civil Engineering, Harbin Institute of Technology, Shenzhen, 518055, China.

Yonghua YuNational Laboratory of Solid State Microstructures & School of Advanced Manufacturing Engineering, Nanjing University, Suzhou, 215163, China.

Changwen MiaoState Key Laboratory of Engineering Materials for Major Infrastructure, School of Materials Science and Engineering, Southeast University, Nanjing, 211189, China.

Ming-Hui LuNational Laboratory of Solid State Microstructures & School of Advanced Manufacturing Engineering, Nanjing University, Suzhou, 215163, China. luminghui@nju.edu.cn.ORCID http://orcid.org/0000-0003-0401-9844

Wei SheState Key Laboratory of Engineering Materials for Major Infrastructure, School of Materials Science and Engineering, Southeast University, Nanjing, 211189, China. weishe@seu.edu.cn.ORCID http://orcid.org/0000-0002-6959-1625

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Achieving low-frequency and broadband sound absorption in mechanically robust, space-efficient structures remains a central challenge in acoustic materials design. Here we report a nanoconfined freezing-assisted in situ polymerization strategy that enables the construction of acoustic meta-aerogels with hierarchical nano-micro-macro architectures. Under nanoconfinement, calcium-aluminosilicate hydrate nanoparticles nucleate and assemble along aligned microchannels, where nanoporous calcium-aluminosilicate hydrate phases anchored to the channel walls induce adsorption-desorption hysteresis, thereby generating a resonant-cavity-like acoustic response that enhances low-frequency absorption. This multiscale configuration, featuring aligned microscopic channels reinforced by strongly bonded calcium-aluminosilicate hydrate nanoparticles, facilitates efficient load transfer and structural integrity while promoting interfacial energy dissipation. The resulting aerogels exhibit low density ( ~ 50 mg cm

Identifiers

PMID42918781

DOI10.1038/s41893-022-01035-y

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