{"title":"Dimensional upgrading of 0D silica nanospheres to 3D networking toward robust aerogels for fire resistance and low-carbon applications","authors":"","doi":"10.1016/j.mser.2024.100842","DOIUrl":null,"url":null,"abstract":"<div><p>Over 40 % of global energy consumption is attributed to thermal regulation in buildings, highlighting the imperative for low-carbon structures. Aerogel insulation materials with low thermal conductivity show promise for energy-saving buildings. However, their widespread adoption is hindered by inadequate mechanical robustness, stability, and fire resistance. Herein, inspired by plant root-soil structures, mechanically robust Poly-p-phenylene benzoxazole (PBO) nanofiber-reinforced silica aerogels (BNFSi) are designed and synthesized <em>via</em> a dimension-upgrading strategy. The optimized BNFSi are characterized by Compressive strength (3.2 MPa). Additionally, the aerogel demonstrates several outstanding properties, such as low thermal conductivity (27.3 mW m<sup>−1</sup> K<sup>−1</sup>), superior flame retardancy, high mass retention rate (79.7 %), high reflectivity in the visible to near-infrared spectrum (∼ 92 %), and inherent super-hydrophobic surface with a 150.3° water contact angle, indicating self-cleaning potential. The biomimetic-designed structure resolved the inherent brittleness of the silica network while inducing fire-resistant and ideal insulating performance, thus offering a promising avenue for advancing energy-conserving buildings, aligning with the objectives of next-generation eco-conscious construction.</p></div>","PeriodicalId":386,"journal":{"name":"Materials Science and Engineering: R: Reports","volume":null,"pages":null},"PeriodicalIF":31.6000,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Materials Science and Engineering: R: Reports","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0927796X2400072X","RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
Over 40 % of global energy consumption is attributed to thermal regulation in buildings, highlighting the imperative for low-carbon structures. Aerogel insulation materials with low thermal conductivity show promise for energy-saving buildings. However, their widespread adoption is hindered by inadequate mechanical robustness, stability, and fire resistance. Herein, inspired by plant root-soil structures, mechanically robust Poly-p-phenylene benzoxazole (PBO) nanofiber-reinforced silica aerogels (BNFSi) are designed and synthesized via a dimension-upgrading strategy. The optimized BNFSi are characterized by Compressive strength (3.2 MPa). Additionally, the aerogel demonstrates several outstanding properties, such as low thermal conductivity (27.3 mW m−1 K−1), superior flame retardancy, high mass retention rate (79.7 %), high reflectivity in the visible to near-infrared spectrum (∼ 92 %), and inherent super-hydrophobic surface with a 150.3° water contact angle, indicating self-cleaning potential. The biomimetic-designed structure resolved the inherent brittleness of the silica network while inducing fire-resistant and ideal insulating performance, thus offering a promising avenue for advancing energy-conserving buildings, aligning with the objectives of next-generation eco-conscious construction.
期刊介绍:
Materials Science & Engineering R: Reports is a journal that covers a wide range of topics in the field of materials science and engineering. It publishes both experimental and theoretical research papers, providing background information and critical assessments on various topics. The journal aims to publish high-quality and novel research papers and reviews.
The subject areas covered by the journal include Materials Science (General), Electronic Materials, Optical Materials, and Magnetic Materials. In addition to regular issues, the journal also publishes special issues on key themes in the field of materials science, including Energy Materials, Materials for Health, Materials Discovery, Innovation for High Value Manufacturing, and Sustainable Materials development.