Department of Chemistry, Jilin University, Changchun 130021, PR China.
J Colloid Interface Sci. 2010 May 15;345(2):491-5. doi: 10.1016/j.jcis.2010.01.051. Epub 2010 Jan 25.
Superhydrophobic polystyrene (PS) surfaces with mechanical integrity were manufactured by electrospinning in this work. We first report a novel strategy here to combine bead-on-string fibers from 4% PS solution and micro-sized fibers from 20% PS solution homogeneously in one electrospinning step by multinozzle electrospinning. The superhydrophobicity of electrospun sheet can be achieved by the presence of bead-on-string fibers, while micro-sized PS fibers are responsible for the improvement of mechanical property of electrospun mat due to their elastic and flexible behavior. The distinctive design of our multinozzle electrospinning setup places two nozzles in separate electrical fields which guarantee that fibers with different structures are mixed homogeneously. We investigate the relationship between the mass ratio of fibers from two types of solutions and the CA of electrospun mat, the effect of mass ratio to the mechanical property of electrospun mat can also be observed. The result shows that CA value of PS surface merely comprised of bead-on-string fibers could reach up to 154.65°. As the content of microfibers increased, the value of CA decreased, ranging from 153.66° to 145.94°, but the tensile strength of composite mat was enhanced from 0.50 MPa to 1.22 MPa correspondingly which is beneficial to put the mats into practice.
这项工作通过静电纺丝制造出具有机械完整性的超疏水聚苯乙烯（PS）表面。我们首次在此报告了一种新策略，通过多喷嘴静电纺丝在一个静电纺丝步骤中将 4% PS 溶液的串珠纤维和 20% PS 溶液的微纤维均匀地结合在一起。由于串珠纤维的存在，电纺片可以实现超疏水性，而微 PS 纤维由于其弹性和柔韧性，负责提高电纺毡的机械性能。我们的多喷嘴静电纺丝装置的独特设计将两个喷嘴放置在单独的电场中，这保证了具有不同结构的纤维均匀混合。我们研究了两种溶液的纤维质量比与电纺毡的 CA 之间的关系，还可以观察到质量比对电纺毡机械性能的影响。结果表明，仅由串珠纤维组成的 PS 表面的 CA 值可高达 154.65°。随着微纤维含量的增加，CA 值降低，范围从 153.66°至 145.94°，但复合毡的拉伸强度相应地从 0.50 MPa 提高到 1.22 MPa，这有利于将毡投入实际应用。
