{"title":"Eco-Friendly Skin-Wrinkle-Inspired Micro-Nano Structured Cellulose Composite Fibers for Highly Efficient Daytime Radiative Cooling.","authors":"Qihua Li,Jianfeng Li,Chen Zeng,Jingya Song,Yuchen Jiang,Haining Yu,Yu Fang,Shufeng Hu,Youwei Zhang,Weiqing Kong,Meifang Zhu","doi":"10.1021/acsnano.5c06103","DOIUrl":null,"url":null,"abstract":"Passive radiative cooling fabrics offer a sustainable pathway to reduce energy consumption in thermal management, yet their reliance on petroleum-derived materials and complex coating processes compromises both environmental compatibility and wearability. To address these challenges, we propose a bioinspired, coating-free strategy by designing regenerated cellulose/SiO2 nanoparticle fibers (RCSF) via wet-spinning. Mimicking the micro-nano structure of the human skin surface (protrusion height ≈ 2 μm), the RCSF achieves simultaneous high solar reflectivity (93.7% at 0.4-1 μm) and infrared emissivity (0.98 at 8-13 μm) through intrinsic material properties rather than external coatings. The hierarchical porous structure enhances the specific surface area while maintaining air permeability (75% improvement vs pristine cellulose fabrics) and moisture-wicking performance. Under 800 W m-2 solar irradiation, RCSF exhibits a net cooling power of 100.1 W m-2, translating to a 5 °C temperature reduction in summer environments compared with regenerated cellulose fibers (RCF). Crucially, this one-step fabrication method eliminates toxic paints and energy-intensive post-treatments, offering a cost-effective alternative to conventional coated fabrics. By integrating renewable cellulose with skin-wrinkle-inspired structural design, our work establishes a paradigm for eco-efficient radiative cooling materials that balance optical performance, wearer comfort, and scalable manufacturing.","PeriodicalId":21,"journal":{"name":"ACS Nano","volume":"64 1","pages":""},"PeriodicalIF":16.0000,"publicationDate":"2025-09-25","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.5c06103","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
Passive radiative cooling fabrics offer a sustainable pathway to reduce energy consumption in thermal management, yet their reliance on petroleum-derived materials and complex coating processes compromises both environmental compatibility and wearability. To address these challenges, we propose a bioinspired, coating-free strategy by designing regenerated cellulose/SiO2 nanoparticle fibers (RCSF) via wet-spinning. Mimicking the micro-nano structure of the human skin surface (protrusion height ≈ 2 μm), the RCSF achieves simultaneous high solar reflectivity (93.7% at 0.4-1 μm) and infrared emissivity (0.98 at 8-13 μm) through intrinsic material properties rather than external coatings. The hierarchical porous structure enhances the specific surface area while maintaining air permeability (75% improvement vs pristine cellulose fabrics) and moisture-wicking performance. Under 800 W m-2 solar irradiation, RCSF exhibits a net cooling power of 100.1 W m-2, translating to a 5 °C temperature reduction in summer environments compared with regenerated cellulose fibers (RCF). Crucially, this one-step fabrication method eliminates toxic paints and energy-intensive post-treatments, offering a cost-effective alternative to conventional coated fabrics. By integrating renewable cellulose with skin-wrinkle-inspired structural design, our work establishes a paradigm for eco-efficient radiative cooling materials that balance optical performance, wearer comfort, and scalable manufacturing.
被动式辐射冷却织物为减少热管理中的能源消耗提供了可持续的途径,但它们对石油衍生材料的依赖和复杂的涂层工艺损害了环境兼容性和耐磨性。为了解决这些挑战,我们提出了一种受生物启发的无涂层策略,即通过湿纺丝设计再生纤维素/SiO2纳米颗粒纤维(RCSF)。RCSF模拟人体皮肤表面的微纳结构(突出高度≈2 μm),通过材料本身的特性,而不是外部涂层,实现了较高的太阳反射率(0.4-1 μm)和红外发射率(8-13 μm)。分层多孔结构增强了比表面积,同时保持了透气性(与原始纤维素织物相比提高了75%)和排湿性能。在800 W m-2的太阳辐照下,RCSF的净冷却能力为100.1 W m-2,与再生纤维素纤维(RCF)相比,在夏季环境中可降低5°C的温度。至关重要的是,这种一步制造方法消除了有毒油漆和能源密集型的后处理,为传统涂层织物提供了一种具有成本效益的替代品。通过将可再生纤维素与皮肤皱纹启发的结构设计相结合,我们的工作建立了生态高效辐射冷却材料的典范,平衡了光学性能、佩戴者舒适度和可扩展的制造。
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.