Phase-change textiles can achieve temperature regulation in variable ambient environments, however, augmenting the amounts of phase-change materials (PCMs) in textiles remains a significant challenge due to the occurrence of leakage with higher amounts. Herein, a novel approach is proposed for the fabrication of a hierarchical nanofiber textile embedded with a substantial quantity of phase-change microcapsules (PCMC) using electrospinning. Such nanofiber textile is composed of a polyvinylidene fluoride-hexafluoropropylene fibers (PVDF-HFP) layer and a polyvinyl butyral fibers doped with 60 wt% of PCMC (PVB/PCMC-60) layer. Gratifyingly, doped PCMC shows no signs of rupture and exhibits excellent cycling stability. Furthermore, the incorporation of the PCMC does not affect the spectral characteristics of the PVDF-HFP layer while providing a substantial enthalpy of fusion (92.6 J g⁻¹) to the PVB/PCMC-60 layer. This serves to compensate for the deficiency in radiative cooling capacity and effectively mitigates temperature fluctuations and overheating of the textile. Outdoor test results indicate that the nanofiber textile can achieve temperature drops of 3.7 and 14.8 °C compared to textile without the PCMC (namely PVDF-HFP/PVB) and cotton, and attains a subambient temperature drop of 6.5 °C. Additionally, the nanofiber textile exhibits desirable mechanical strength, flexibility, washability, breathability, moisture permeability, and sun protection.

中文翻译：

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一种通过静电纺丝增加纳米纤维纺织品中相变微胶囊的新方法


相变纺织品可以在可变的周围环境中实现温度调节，然而，由于发生大量泄漏，增加纺织品中相变材料 （PCM） 的数量仍然是一个重大挑战。在此，提出了一种使用静电纺丝制备嵌入大量相变微胶囊 （PCMC） 的分层纳米纤维纺织品的新方法。这种纳米纤维纺织品由聚偏二氟乙烯-六氟丙烯纤维 （PVDF-HFP） 层和掺杂 60 wt% 的 PCMC （PVB/PCMC-60） 层的聚乙烯醇缩丁醛纤维组成。令人欣慰的是，掺杂的 PCMC 没有破裂的迹象，并且表现出优异的循环稳定性。此外，PCMC 的掺入不会影响 PVDF-HFP 层的光谱特性，同时为 PVB/PCMC-60 层提供相当大的熔融焓 （92.6 J g⁻¹）。这有助于弥补辐射冷却能力的不足，并有效缓解温度波动和纺织品过热。室外测试结果表明，与没有 PCMC（即 PVDF-HFP/PVB）和棉花的纺织品相比，纳米纤维纺织品可以实现 3.7 和 14.8 °C 的温降，并达到 6.5 °C 的低于环境温度下降。 此外，纳米纤维纺织品表现出理想的机械强度、柔韧性、耐洗性、透气性、透湿性和防晒性。