Electrospinning pH-Responsive Block Copolymer Nanofibers


  • This work was supported by Industrial Chemicals Industry (ICI) and the Engineering and Physical Science Research Council (EPSRC), grant numbers GR/R77544 (P.D.T.), GR/S47496 (J.R.H.) and GR/T11852/01 (O.O.M.). L.W. thanks Dr. D. Norton for the valuable help of building the electrospinning apparatus and acknowledges the China Scholarship Council (CSC). Supporting Information is available online from Wiley InterScience or from the author.


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Ultrafine fibers of a pH-responsive triblock copolymer with different diameters, alignment, and microdomain order are prepared via electrospinning and solvent-vapor annealing. Fibrous samples display much quicker response times than the corresponding films owing to the increase in external surface area. The fibrils of annealed, aligned, electrospun fibers show a dramatic apparent “1D” pH-induced size-change during the experiment.