具有交替硬核和柔性链的分层构建块用于超高强度气凝胶

IF 9.6 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Nano Letters Pub Date : 2025-06-17 DOI:10.1021/acs.nanolett.5c01080

Xin Long, Jubo Tang, Congli Luo, Jianan Qin, Yu Wang, Lichun Zhou, Xiongbang Wei, Ying Lin, Shaolong Shi, Jiaxuan Liao

{"title":"具有交替硬核和柔性链的分层构建块用于超高强度气凝胶","authors":"Xin Long, Jubo Tang, Congli Luo, Jianan Qin, Yu Wang, Lichun Zhou, Xiongbang Wei, Ying Lin, Shaolong Shi, Jiaxuan Liao","doi":"10.1021/acs.nanolett.5c01080","DOIUrl":null,"url":null,"abstract":"Low strength is a critical issue hindering the development and application of SiO2 aerogels. Although some progress has been made in optimizing mechanical flexibility, there is still a gap from practical application standards. Regarding this, we implemented a molecular-level design featuring an alternating hard-core and soft-chain structure to sacrificially enhance compressive strength and significantly improve deformability, and engineered hierarchical building blocks to bolster structural stability at the nanoscale. The resulting SiO2-based aerogel demonstrated a strong combination of singular performance advantages and multifunctionality, including ultrahigh compressive strength, exceptional deformability and structural stability, thermal superinsulation capabilities, superhydrophobicity, and notable hydrophobic stability. Particularly, the compressive strength not only surpassed previously reported aerogel materials (65.6 MPa at 0.245 g/cm3), but its lightweight high-strength characteristics also outperformed various ultralight 1D nanofiber aerogels (ln(E) ≈ ln(ρ)1.65256). This combination offers an attractive material system for robust thermal superinsulation in mechanically complex and highly humid environments.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"36 1","pages":""},"PeriodicalIF":9.6000,"publicationDate":"2025-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Hierarchical Building Blocks with Alternating Hard Cores and Flexible Chains for Ultrahigh Strength Aerogel\",\"authors\":\"Xin Long, Jubo Tang, Congli Luo, Jianan Qin, Yu Wang, Lichun Zhou, Xiongbang Wei, Ying Lin, Shaolong Shi, Jiaxuan Liao\",\"doi\":\"10.1021/acs.nanolett.5c01080\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Low strength is a critical issue hindering the development and application of SiO2 aerogels. Although some progress has been made in optimizing mechanical flexibility, there is still a gap from practical application standards. Regarding this, we implemented a molecular-level design featuring an alternating hard-core and soft-chain structure to sacrificially enhance compressive strength and significantly improve deformability, and engineered hierarchical building blocks to bolster structural stability at the nanoscale. The resulting SiO2-based aerogel demonstrated a strong combination of singular performance advantages and multifunctionality, including ultrahigh compressive strength, exceptional deformability and structural stability, thermal superinsulation capabilities, superhydrophobicity, and notable hydrophobic stability. Particularly, the compressive strength not only surpassed previously reported aerogel materials (65.6 MPa at 0.245 g/cm3), but its lightweight high-strength characteristics also outperformed various ultralight 1D nanofiber aerogels (ln(E) ≈ ln(ρ)1.65256). This combination offers an attractive material system for robust thermal superinsulation in mechanically complex and highly humid environments.\",\"PeriodicalId\":53,\"journal\":{\"name\":\"Nano Letters\",\"volume\":\"36 1\",\"pages\":\"\"},\"PeriodicalIF\":9.6000,\"publicationDate\":\"2025-06-17\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Nano Letters\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://doi.org/10.1021/acs.nanolett.5c01080\",\"RegionNum\":1,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"CHEMISTRY, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Nano Letters","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1021/acs.nanolett.5c01080","RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}

引用次数: 0

摘要

低强度是阻碍SiO2气凝胶发展和应用的关键问题。虽然在优化机械柔性方面取得了一些进展，但与实际应用标准仍有差距。为此，我们实施了一种分子水平的设计，采用硬核和软链交替结构，以牺牲提高抗压强度并显着提高变形能力，并设计了分层构建块，以增强纳米级结构的稳定性。由此产生的二氧化硅气凝胶具有强大的单一性能优势和多功能性，包括超高的抗压强度、卓越的变形能力和结构稳定性、超保温能力、超疏水性和显著的疏水稳定性。特别是，其抗压强度不仅超过了先前报道的气凝胶材料（0.245 g/cm3时为65.6 MPa），而且其轻质高强特性也优于各种超轻1D纳米纤维气凝胶(ln（E)≈ln(ρ)1.65256）。这种组合提供了一个有吸引力的材料系统，在机械复杂和高度潮湿的环境中具有强大的超保温性能。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Hierarchical Building Blocks with Alternating Hard Cores and Flexible Chains for Ultrahigh Strength Aerogel

查看原文本刊更多论文

Hierarchical Building Blocks with Alternating Hard Cores and Flexible Chains for Ultrahigh Strength Aerogel

Low strength is a critical issue hindering the development and application of SiO₂ aerogels. Although some progress has been made in optimizing mechanical flexibility, there is still a gap from practical application standards. Regarding this, we implemented a molecular-level design featuring an alternating hard-core and soft-chain structure to sacrificially enhance compressive strength and significantly improve deformability, and engineered hierarchical building blocks to bolster structural stability at the nanoscale. The resulting SiO₂-based aerogel demonstrated a strong combination of singular performance advantages and multifunctionality, including ultrahigh compressive strength, exceptional deformability and structural stability, thermal superinsulation capabilities, superhydrophobicity, and notable hydrophobic stability. Particularly, the compressive strength not only surpassed previously reported aerogel materials (65.6 MPa at 0.245 g/cm³), but its lightweight high-strength characteristics also outperformed various ultralight 1D nanofiber aerogels (ln(E) ≈ ln(ρ)^1.65256). This combination offers an attractive material system for robust thermal superinsulation in mechanically complex and highly humid environments.

求助全文

通过发布文献求助，成功后即可免费获取论文全文。去求助

来源期刊

Nano Letters 工程技术-材料科学：综合

CiteScore

16.80

自引率

2.80%

发文量

1182

审稿时长

1.4 months

期刊介绍： Nano Letters serves as a dynamic platform for promptly disseminating original results in fundamental, applied, and emerging research across all facets of nanoscience and nanotechnology. A pivotal criterion for inclusion within Nano Letters is the convergence of at least two different areas or disciplines, ensuring a rich interdisciplinary scope. The journal is dedicated to fostering exploration in diverse areas, including: - Experimental and theoretical findings on physical, chemical, and biological phenomena at the nanoscale - Synthesis, characterization, and processing of organic, inorganic, polymer, and hybrid nanomaterials through physical, chemical, and biological methodologies - Modeling and simulation of synthetic, assembly, and interaction processes - Realization of integrated nanostructures and nano-engineered devices exhibiting advanced performance - Applications of nanoscale materials in living and environmental systems Nano Letters is committed to advancing and showcasing groundbreaking research that intersects various domains, fostering innovation and collaboration in the ever-evolving field of nanoscience and nanotechnology.