改性PAN基纳米纤维膜的防水透气性能研究

Study on the waterproof and breathability of modified PAN based nanofiber membrane

用超声分散法对二氧化硅(SiO2)纳米颗粒进行分散处理,加入聚丙烯腈(PAN)进行PAN的溶解,经气流纺丝工艺制备SiO2/PAN杂化纳米纤维膜,并在空气中低温煅烧进行预氧化处理,用该方法制得的纤维膜具有良好的透气性。使用扫描电子显微镜对纤维膜表面进行观察,研究了不同SiO2掺杂量的纤维膜表面形貌与防水透气性能的变化。结果显示,SiO2的加入和预氧化大大提高了材料表面的粗糙度,减少了纤维膜内的微孔孔径,提高了PAN纳米纤维膜的拉伸强度,从而使预氧化SiO2/PAN杂化纳米纤维膜具有良好的防水透气性。

Silica (SiO 2) nanoparticles were dispersed by ultrasonic dispersion method, and were mixed with polyacrylonitrile (PAN) to prepare SiO 2/PAN hybrid nanofiber membrane by air-jet spinning process, and pre-oxidation treatment in low temperature calcination in air. The fiber membrane produced by the method has good gas permeability. The surface of these fiber membranes was observed by scanning electron microscopy. The surface morphology and waterproof and air permeability properties of fiber membranes with different SiO 2 doping amount were investigated. The results show that the addition of SiO 2 and pre-oxidation greatly improve the surface roughness of the material, and reduce the pore diameter in the fiber membrane, and increase the tensile strength of the PAN nanofiber membrane. Thereby, the pre-oxidized SiO 2/PAN hybrid nanofiber membrane has good waterproof and gas permeability.