Xiao Yuanxiang, Zheng Weishi, Guan Jibiao, Chen Yingyao, Chen Runxin, Zhao Yini, Xiang Shuangfei
Hangzhou Vocational and Technical College, Hangzhou 310018, China.
Zhejiang University School of Medicine, Hangzhou 310018, China.
Nanoscale. 2025 Jul 16;17(28):16767-16774. doi: 10.1039/d5nr01671a.
Radiative cooling offers a sustainable thermal management strategy for personal cooling under extreme solar exposure. Herein, a surface-engineered radiative cooling fabric (PHB-4%) was developed utilizing a simple electrospinning technique. PHB-4% strategically integrates two-dimensional boron nitride nanosheets (BNNSs) with a high refractive index as photon scattering centers within polyvinylidene fluoride--hexafluoropropylene (PVDF-HFP) nanofibers. Through synergistic optimization of hierarchical micro-nano porous architectures and BNNS-enhanced photon scattering, the engineered PHB-4% achieves 94% solar reflectivity and 91.5% mid-infrared (MIR) emissivity, enabling a sub-ambient cooling effect of 5 °C under 824.4 W m solar irradiation. Remarkably, the PHB fabric maintains 92% reflectivity after extended ultraviolet exposure (60 days) and repeated laundering (100 cycles), outperforming conventional cooling textiles. The inherent hydrophobicity of PVDF-HFP further endows PHB-4% with antifouling capabilities and contamination resistance. Besides, the evaluation of basic properties confirms preserved flexibility, adequate breathability, and sufficient mechanical durability for wearable applications. This multifunctional cooling textile platform establishes new possibilities for sustainable personal thermal regulation and energy-efficient outdoor thermal management systems.
辐射冷却为在极端阳光照射下的个人降温提供了一种可持续的热管理策略。在此，利用简单的静电纺丝技术开发了一种表面工程化的辐射冷却织物（PHB-4%）。PHB-4%策略性地将具有高折射率的二维氮化硼纳米片（BNNSs）作为光子散射中心整合到聚偏二氟乙烯-六氟丙烯（PVDF-HFP）纳米纤维中。通过对分级微纳多孔结构和BNNS增强的光子散射进行协同优化，工程化的PHB-4%实现了94%的太阳反射率和91.5%的中红外（MIR）发射率，在824.4 W m的太阳辐照下实现了5°C的亚环境冷却效果。值得注意的是，PHB织物在长时间紫外线暴露（60天）和反复洗涤（100次循环）后仍保持92%的反射率，优于传统的冷却纺织品。PVDF-HFP固有的疏水性进一步赋予PHB-4%防污能力和抗污染性。此外，对基本性能的评估证实了其在可穿戴应用中保留的柔韧性、足够的透气性和足够的机械耐久性。这个多功能冷却纺织品平台为可持续的个人热调节和节能户外热管理系统开辟了新的可能性。
