超疏水PS/PAN复合纳米纤维的制备及性能研究

Preparation and property of superhydrophobic PS/PAN composite nanofiber

采用静电纺丝法,以聚苯乙烯(PS)和聚丙烯腈(PAN)为溶质,N,N-二甲基甲酰胺(DMF)为溶剂,制备了水接触角为152.5°的具有肩并肩结构的超疏水PS/PAN复合纳米纤维。通过扫描电子显微镜和光学接触角测量仪研究了PS/PAN质量配比、注射速度对复合纳米纤维直径、形貌特征、疏水性及疏水稳定性的影响。结果表明:当PS质量分数占PS/PAN质量分数70%、注射速度为1mL/h时,复合纳米纤维具有较好的疏水稳定性和超疏水性,纤维直径最小,具有明显的肩并肩结构;纤维直径、表面粗糙度和PS含量是影响疏水性的关键因素;PS含量的增加有助于提高复合纳米纤维的疏水稳定性。

The side-by-side superhydrophobic PS/PAN nanofibers with water contact angle of 152.5° were prepared using polystyrene(PS)and polyacrylonitrile(PAN)as solute and N,N-dimethyl formamide(DMF)as solvent by electrostatic spinning.The fiber diameter,morphology characteristics,hydrophobicity and hydrophobic stability were researched by scanning electron microscope(SEM)and optical contact angle measurement under different content ratios and injection speeds.The results showed that the fiber had good hydrophobic stability and hydrophobicity when the mass fraction of PS in PS/PAN was 70% and the injection rate was 1 mL/h,the fiber diameter was the smallest,and the fiber had obvious side-by-side structure.It was found that the fiber diameter,surface roughness and PS content were the key factors of hydrophobicity.The increase of PS content was helpful to improve the hydrophobic stability of the composite fiber.