聚亚苯基砜/聚氨酯微纳米纤维絮片测试数据集

在冰冻天气中，非常需要用于个人防寒的保暖设备；然而，目前的保暖材料大多导热系数高、机械性能差、易燃性强，存在严重的安全隐患。在此，我们报告了一种通过直接静电纺丝制备具有超弹性、有效保暖性能的纳米/微纤维海绵的简单策略。通过精确调节相对湿度，构建低体积密度、高孔隙率的三维蓬松海绵；同时，创新性地引入机械坚固的聚酰胺-酰亚胺纳米纤维，以改善纳米/微米纤维海绵的结构稳定性。引人注目的是，所开发的纳米/微纤维海绵表现出超轻的特性(6.9mg/cm3)、超弹性(100次压缩测试后塑性变形为0%)和良好的保温能力(热导率为24.6mW/(m·K)。这项工作可能有助于设计各种应用的超弹性和保暖材料。In freezing weather, personal thermal insulation equipment for cold protection is in high demand. However, most existing thermal insulation materials feature high thermal conductivity, poor mechanical properties, and high flammability, posing severe safety hazards. Herein, we report a facile strategy for fabricating superelastic, highly effective thermal insulation nano/microfiber sponges via direct electrospinning. By precisely adjusting the relative humidity, we construct three-dimensional (3D) fluffy sponges with low bulk density and high porosity; meanwhile, we innovatively introduce mechanically robust polyamide-imide nanofibers to improve the structural stability of the nano/microfiber sponges. Notably, the as-developed nano/microfiber sponges exhibit ultra-lightweight properties (6.9 mg/cm³), superelasticity (0% plastic deformation after 100 compression tests), and excellent thermal insulation performance with a thermal conductivity of 24.6 mW/(m·K). This work may facilitate the design of superelastic and thermal insulation materials for various applications.