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A Thermoregulatory Flexible Phase Change Nonwoven for All-Season High-Efficiency Wearable Thermal Management
Nano-Micro Letters ( IF 26.6 ) Pub Date : 2023-01-04 , DOI: 10.1007/s40820-022-00991-6
Hanqing Liu 1, 2, 3 , Feng Zhou 2 , Xiaoyu Shi 2 , Keyan Sun 1 , Yan Kou 1 , Pratteek Das 2, 3 , Yangeng Li 1, 3 , Xinyu Zhang 1, 3 , Srikanth Mateti 4 , Ying Chen 4 , Zhong-Shuai Wu 2 , Quan Shi 1
Affiliation  

Phase change materials have a key role for wearable thermal management, but suffer from poor water vapor permeability, low enthalpy value and weak shape stability caused by liquid phase leakage and intrinsic rigidity of solid–liquid phase change materials. Herein, we report for the first time a versatile strategy for designed assembly of high-enthalpy flexible phase change nonwovens (GB-PCN) by wet-spinning hybrid graphene-boron nitride (GB) fiber and subsequent impregnating paraffins (e.g., eicosane, octadecane). As a result, our GB-PCN exhibited an unprecedented enthalpy value of 206.0 J g−1, excellent thermal reliability and anti-leakage capacity, superb thermal cycling ability of 97.6% after 1000 cycles, and ultrahigh water vapor permeability (close to the cotton), outperforming the reported PCM films and fibers to date. Notably, the wearable thermal management systems based on GB-PCN for both clothing and face mask were demonstrated, which can maintain the human body at a comfortable temperature range for a significantly long time. Therefore, our results demonstrate huge potential of GB-PCN for human-wearable passive thermal management in real scenarios.



中文翻译:

用于全季节高效可穿戴热管理的温度调节柔性相变非织造布

相变材料在可穿戴热管理中发挥着关键作用,但由于液相泄漏和固液相变材料固有的刚性而导致水蒸气渗透性差、焓值低和形状稳定性差。在此,我们首次报告了一种通过湿纺混合石墨烯-氮化硼(GB)纤维和随后浸渍石蜡(例如二十烷、十八烷)设计组装高焓柔性相变非织造布(GB-PCN)的通用策略。 )。结果,我们的GB-PCN表现出了前所未有的206.0 J g -1的焓值、优异的热可靠性和抗泄漏能力、1000次循环后97.6%的优异热循环能力以及超高的水蒸气渗透性(接近棉) ),优于迄今为止报道的 PCM 薄膜和纤维。值得注意的是,展示了基于GB-PCN的可穿戴热管理系统,适用于衣服和口罩,可以使人体长时间保持在舒适的温度范围内。因此,我们的结果证明了 GB-PCN 在实际场景中用于人类可穿戴被动热管理的巨大潜力。

更新日期:2023-01-04
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