{"title":"Confined Gelation Synthesis of Flexible Barium Aluminate Nanofibers as a High-Performance Refractory Material","authors":"Hualei Liu, Xiaodan Huo, Peili Zhao, Ruixiang Xu, Xinxin Zhang, Jianyong Yu, Yi-Tao Liu, Bin Ding","doi":"10.1021/acsnano.4c11854","DOIUrl":null,"url":null,"abstract":"Barium aluminate (BAO) ceramics are highly sought after as a kind of high-temperature refractory material due to their exceptional thermal stability in both vacuum and oxygen atmospheres, but their inherent brittleness results in rapid hardening, imposing a negative impact on the overall construction performance. Here, we report a strategy to synthesize flexible BAO nanofibers with a needle-like structure through confined-gelation electrospinning followed by in situ mineralization. The confined gelation among the colloidal particles promotes the formation of precursor nanofibers with high continuity and a large aspect ratio. The resulting flexible BAO nanofiber membranes are bendable, stretchable, and can even be woven, exhibiting a softness (12 mN) that is lower than that of tissue paper (27 mN). Additionally, they are capable of withstanding hundreds to thousands of continuous buckling and bending at 50% deformation without tearing. More importantly, the low emissivity of the flexible BAO nanofiber membranes ensures excellent thermal insulation at 1300 °C while preserving structural integrity and performance stability. In this sense, our strategy can be easily scaled up to produce flexible yet tough oxide ceramic membranes for a wider range of applications.","PeriodicalId":21,"journal":{"name":"ACS Nano","volume":null,"pages":null},"PeriodicalIF":15.8000,"publicationDate":"2024-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"ACS Nano","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1021/acsnano.4c11854","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
Abstract
Barium aluminate (BAO) ceramics are highly sought after as a kind of high-temperature refractory material due to their exceptional thermal stability in both vacuum and oxygen atmospheres, but their inherent brittleness results in rapid hardening, imposing a negative impact on the overall construction performance. Here, we report a strategy to synthesize flexible BAO nanofibers with a needle-like structure through confined-gelation electrospinning followed by in situ mineralization. The confined gelation among the colloidal particles promotes the formation of precursor nanofibers with high continuity and a large aspect ratio. The resulting flexible BAO nanofiber membranes are bendable, stretchable, and can even be woven, exhibiting a softness (12 mN) that is lower than that of tissue paper (27 mN). Additionally, they are capable of withstanding hundreds to thousands of continuous buckling and bending at 50% deformation without tearing. More importantly, the low emissivity of the flexible BAO nanofiber membranes ensures excellent thermal insulation at 1300 °C while preserving structural integrity and performance stability. In this sense, our strategy can be easily scaled up to produce flexible yet tough oxide ceramic membranes for a wider range of applications.
铝酸钡(BAO)陶瓷因其在真空和氧气环境中都具有优异的热稳定性而作为一种高温耐火材料备受青睐,但其固有的脆性会导致快速硬化,从而对整体建筑性能造成负面影响。在此,我们报告了一种通过封闭凝胶电纺丝然后原位矿化合成具有针状结构的柔性 BAO 纳米纤维的策略。胶体颗粒之间的封闭凝胶化促进了具有高连续性和大纵横比的前体纳米纤维的形成。由此产生的柔性 BAO 纳米纤维膜可弯曲、拉伸,甚至可以编织,其柔软度(12 mN)低于纸巾的柔软度(27 mN)。此外,纳米纤维膜还能承受数百至数千次的连续屈曲,并在 50%变形时不会撕裂。更重要的是,柔性 BAO 纳米纤维膜的低发射率确保了其在 1300 °C 下的绝佳隔热性,同时保持了结构的完整性和性能的稳定性。从这个意义上讲,我们的策略可以很容易地扩大规模,生产出柔韧而坚固的氧化物陶瓷膜,应用于更广泛的领域。
期刊介绍:
ACS Nano, published monthly, serves as an international forum for comprehensive articles on nanoscience and nanotechnology research at the intersections of chemistry, biology, materials science, physics, and engineering. The journal fosters communication among scientists in these communities, facilitating collaboration, new research opportunities, and advancements through discoveries. ACS Nano covers synthesis, assembly, characterization, theory, and simulation of nanostructures, nanobiotechnology, nanofabrication, methods and tools for nanoscience and nanotechnology, and self- and directed-assembly. Alongside original research articles, it offers thorough reviews, perspectives on cutting-edge research, and discussions envisioning the future of nanoscience and nanotechnology.