Electrospun poly(ε-caprolactone) (PCL)/polypyrrole (PPy) membranes were prepared by in situ polymerization of pyrrole (Py) via oxidization with ferric chloride from PCL/chloroform solutions containing Py.Sodium dodecyl sulfate was also added in the electrospinning solution for doping PPy.The composition of the obtained PCL/PPy membranes was verified by Fourier transform infrared spectroscopy

and the fiber morphology was observed under a scanning electron microscope and a transmission electron microscope.Tensile mechanical properties and the volume resistivity of the PCL/PPy membranes were also tested.Results exhibited that the prepared PPy nanoparticles were attached on the electrospun fiber surface.The fiber diameter decreased gradually from (730±341) nm to (325±84) nm and showed narrower distribution with increasing the Py amount (mass percentage with respect to PCL) from 0 to 20%.The tensile modulus and tensile strength gave rise to an increase tendency

and their values increased from (25.7±0.8) MPa and (2.48±0.14) MPa of the PCL membrane to (48.4±7.6) MPa and (5.05±0.59) MPa of the PCL/PPy membrane with 20% Py

respectively.The elongation at break declined from (129±27)% to (86.2±9.1)% and the volume resistivity reduced by 2~3 orders.The electrospun PCL/PPy fibrous membranes would be possibly applied as electroactive materials in biomedical or functional area.