Ma Minglin, Hill Randal M, Lowery Joseph L, Fridrikh Sergey V, Rutledge Gregory C
Department of Chemical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 01239, USA.
Langmuir. 2005 Jun 7;21(12):5549-54. doi: 10.1021/la047064y.
Block copolymer poly(styrene-b-dimethylsiloxane) fibers with submicrometer diameters in the range 150-400 nm were produced by electrospinning from solution in tetrahydrofuran and dimethylformamide. Contact angle measurements indicate that the nonwoven fibrous mats are superhydrophobic, with a contact angle of 163 degrees and contact angle hysteresis of 15 degrees . The superhydrophobicity is attributed to the combined effects of surface enrichment in siloxane as revealed by X-ray photoelectron spectroscopy and surface roughness of the electrospun mat itself. Additionally, the fibers are shown by transmission electron microscopy to exhibit microphase-separated internal structures. Calorimetric studies confirm the strong segregation between the polystyrene and poly(dimethylsiloxane) blocks.
通过在四氢呋喃和二甲基甲酰胺的溶液中进行静电纺丝，制备出了直径在150 - 400纳米范围内的亚微米级嵌段共聚物聚（苯乙烯 - b - 二甲基硅氧烷）纤维。接触角测量表明，该非织造纤维毡具有超疏水性，接触角为163度，接触角滞后为15度。这种超疏水性归因于X射线光电子能谱所揭示的硅氧烷在表面的富集以及静电纺丝毡本身的表面粗糙度的综合作用。此外，透射电子显微镜显示这些纤维呈现出微相分离的内部结构。量热研究证实了聚苯乙烯和聚（二甲基硅氧烷）嵌段之间的强烈分离。
