材料科学
复合材料
膜
纺纱
保温
同轴
热导率
极限抗拉强度
静电纺丝
热的
芯(光纤)
聚合物
机械工程
遗传学
物理
图层(电子)
气象学
工程类
生物
作者
Lin Wang,Dehua Ma,Chonghe Xu,Xinzhu Gan,Pinghui Ge,Luyi Zhu,Xinqiang Wang,Yadong Lv
标识
DOI:10.1016/j.ceramint.2023.04.111
摘要
With the increasingly serious issues of energy conservation and emission reduction, hollow fibers have attracted wide attention as materials that have structural advantages in terms of thermal insulation. Herein, we report the preparation of flexible hollow TiO2 fibrous membranes via coaxial electrospinning. To optimize the thermal-insulation performance of the fibers, hollow fibers with different diameters and pore sizes were prepared by adjusting the feeding rate of the core spinning solution. Optimum conditions were achieved at a feeding rate of 2 mL/h for the shell solution and 0.4 mL/h for the core solution. The hollow fibers had a compact tube wall structure and good mechanical properties, and the tensile strength of the fibrous membranes reached 0.652 ± 0.119 MPa. In addition, the hollow fibrous membranes have excellent thermal insulation properties with an average reflectance of more than 89% and a room temperature thermal conductivity of less than 0.0294 ± 0.00015 W m−1K−1. In practical experiments, the temperature can be reduced from 1174.6 to below 273.6 °C using 15-mm-thick fibrous membranes, which confirms its excellent thermal insulation. Flexible hollow TiO2 fibrous membranes have a wide range of insulation applications.
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