Fabrication and Characterization of Electrospun Poly(acrylonitrile- co -vinylidene Chloride) Copolymer/Poly( n -tetradecyl acrylate- co -n-hexadecyl Acrylate) Sheath/Core Nanofiber-wrapped Thermo-regulated Filaments

作者：Sai Chen, Lijuan Tao, Wenhua Cai, Haihui Liu, Xuechen Wang, Xingxiang Zhang · 发表于：ACS Applied Energy Materials · 年份：2021 · DOI：10.1021/acsaem.1c01038 · 被引用次数：9 · 研究领域：Advanced Sensor and Energy Harvesting Materials、Electrospun Nanofibers in Biomedical Applications、Phase Change Materials Research

Thermo-regulated fibers, which contain phase change materials with a melting temperature close to human body temperature, have attracted great scientific attention. Nanofibers with poly( n -tetradecyl acrylate- co - n -hexadecyl acrylate) (poly(TDA- co -HDA)) as the core material and poly(acrylonitrile- co -vinylidene chloride) (P(AN- co -VDC) as the sheath were successfully fabricated by coaxial electrostatic spinning technology. The synthesized fibers possessed a sheath/core structure with a melting temperature of approximately 28 °C and an enthalpy of 28 J/g. Coaxial electrostatic spinning was further used to fabricate core-spun yarns using graphene-added PHDA, P(TDA- co -HDA), and P(TDA- co -HDA) as core materials and P(AN- co -VDC) as the sheath to wrap modified poly(ethylene terephthalate) (PET)/poly( n -hexadecyl acrylate) (PHDA) thermo-regulated filaments. The resultant core yarns were completely wrapped by nanofibers, and the enthalpy was about 25 J/g. The fabricated yarns significantly increased the static air adsorption capacity. Infrared photos proved that these yarns improved the thermal insulation performance and prolonged the temperature-regulating period. Therefore, fabrics made of these yarns can act as novel smart materials for temperature-control applications.