热的
热能储存
材料科学
纺纱
热稳定性
工艺工程
灵活性(工程)
相变材料
石墨烯
纳米技术
储能
温度循环
化学工程
复合材料
工程类
生物
统计
物理
气象学
量子力学
功率(物理)
数学
生态学
作者
Hanqing Liu,Haocheng Fu,Shihui Zhang,Xinyu Zhang,Huimin Yan,Yawei Xu,Yuang Zhang,Yan Kou,Quan Shi
标识
DOI:10.1021/acssuschemeng.4c06960
摘要
The development of high-performance phase change fibers (PCFs) represents a significant advance toward achieving intelligent wearable thermal management for humans. However, existing PCFs are limited by a lot of drawbacks, such as low energy storage capacity, poor flexibility, and complex preparation processes. Here, we developed an efficient and simple methodology for the preparation of PCFs utilizing a green wet-spinning technique. The PCFs are composed of discontinuous octadecane microcapsules (M18) and a polymer matrix (sodium alginate), endowing the PCFs with excellent flexibility. Additionally, the fibers exhibit a high energy storage capacity of up to 113.2 J/g, demonstrating a marked improvement over the thermal energy storage capacities of currently available commercial thermoregulating fibers. The PCFs also present excellent shape stability above their melting temperature, confirming their potential for practical applications. Remarkably, colored PCFs could be obtained by incorporating minor quantities of dyes into the spinning solution, thereby improving their practical value. The outstanding thermal cycling stability of the PCFs was confirmed by their maintained enthalpy after they underwent 100 thermal cycling tests. In a subsequent investigation, graphene composite PCFs were prepared and evaluated for their thermal management efficacy, revealing their superior thermal management capabilities. Our findings contribute valuable insights for the research community and manufacturers toward a simplified and efficient production of flexible, high-performance PCFs with broad application potential.
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