Li Shuqin, Wang Haixia, Mao Huiqin, Li Jing, Shi Haifeng
State Key Lab of Separation Membranes and Membrane Processes, School of Material Science and Engineering , Tianjin Polytechnic University , Tianjin 300387 , China.
ACS Appl Mater Interfaces. 2019 Apr 17;11(15):14150-14158. doi: 10.1021/acsami.9b02387. Epub 2019 Apr 2.
A series of coaxial fibers with poly(ethylene terephthalate) (PET) as sheath and poly(tetradecyl acrylate) (PTA) comb-like polymeric phase change material as core have been prepared via an electrospinning technology with carbon nanotube (CNT) dispersed into a core component, denoted as PET/PTA- x CNT, where x is the mass fraction of CNT. The morphology, structure, and thermal performance of coaxial fibers are characterized. Good thermal stability below 300 °C is shown due to the sheath-core structure for PET/PTA- x CNT coaxial fibers. Light-to-thermal conversion effect is contributed from the wide UV-vis light absorbance of CNT and phase change of PTA, and PET/PTA-2% CNT reaches 60 °C after 600 s illumination under 100 mW/cm. Furthermore, a comparable temperature variation is proved for the covered bottle with PET composite membrane containing PET/PTA-2% CNT coaxial fibers, and after 900 s illumination, the inner temperature of the bottle gets to 38 °C, which is 3 °C higher than that of the PET-covered one. The investigations of light-to-thermal conversion and thermoregulated ability of fibers guide an approach to thermal management material and greenhouse film application.
通过静电纺丝技术制备了一系列以聚对苯二甲酸乙二酯（PET）为鞘层、聚（丙烯酸十四酯）（PTA）梳状聚合物相变材料为芯层的同轴纤维，其中碳纳米管（CNT）分散在芯层组分中，记为PET/PTA - x CNT，x为CNT的质量分数。对同轴纤维的形貌、结构和热性能进行了表征。由于PET/PTA - x CNT同轴纤维的鞘芯结构，在300℃以下表现出良好的热稳定性。光热转换效应源于CNT的宽紫外 - 可见光吸收和PTA的相变，在100 mW/cm光照下照射600 s后，PET/PTA - 2% CNT达到60℃。此外，对于含有PET/PTA - 2% CNT同轴纤维的PET复合膜覆盖的瓶子，证明了类似的温度变化，照射900 s后，瓶子内部温度达到38℃，比PET覆盖的瓶子高3℃。对纤维光热转换和温度调节能力的研究为热管理材料和温室薄膜应用提供了一种途径。
