"Innovative Core–Sheath Yarns: Enhancing Electrothermal Performance with Lignin-Derived CNTs and UHMWPE"
Introduction
Carbon nanotubes are renowned for their exceptional electrical conductivity and mechanical strength. However, their practical application in electrothermal systems has been limited by challenges such as energy loss and uneven heat distribution. To address these issues, the study focused on creating a core–sheath structure where the CNT core provides electrical pathways, and the UHMWPE sheath offers insulation, thereby improving overall performance.
Materials and Methods
The researchers utilized lignin, a natural polymer, as a precursor to synthesize carbon nanotubes. Lignin-derived CNTs were chosen due to their sustainability and cost-effectiveness. These CNTs were then encapsulated within a UHMWPE sheath to form the core–sheath yarns. The fabrication process involved spinning techniques that ensured a uniform coating of the CNT core with the polymer sheath.
Results and Discussion
The electrothermal performance of the fabricated yarns was evaluated by applying electrical voltage and measuring the resultant temperature changes. The core–sheath structure demonstrated rapid heating capabilities, achieving desired temperatures swiftly and maintaining uniform heat distribution along the length of the yarn. This uniformity is crucial for applications like wearable heaters and thermal therapy devices, where consistent temperature is essential.
Additionally, the UHMWPE sheath served as an effective electrical insulator, minimizing energy losses and enhancing the safety of the material in practical applications. The mechanical properties of the yarns were also tested, revealing that the incorporation of UHMWPE improved flexibility and durability without compromising the conductive properties of the CNT core.
Conclusion
This study presents a significant advancement in the development of electrothermal materials by combining lignin-derived carbon nanotubes with UHMWPE insulation in a core–sheath configuration. The resulting yarns exhibit superior heating performance, energy efficiency, and mechanical robustness, making them promising candidates for a range of applications, including wearable technology, flexible electronics, and efficient heating systems.
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