Triple-component nanocomposites for improved sustained drug release profiles are successfully fabricated through a modified coaxial electrospinning process, in which only organic solvent N, N-dimethylacetamide was used as sheath fluid. Using polyacrylonitrile (PAN) as filament-forming matrix, ibuprofen (IBU) as functional ingredient, and polyvinylpyrrolidone (PVP) as the additional component, the IBU/PVP/PAN triple-component nanocomposites had uniform structure and an average diameter of 620 +/- 120 nm and 650 +/- 120nm when the contents of PVP in the nanofibers were 10.5% and 22.7%, respectively. The optimal sheath-to-core flow rate ratio was 0.11 under a total sheath and core fluid flow rate of 1.0 mL/h. Compared with the IBU/PAN composite nanofibers, the triple-component composites could release 92.1% and 97.8% of the contained IBU, significantly larger than a value of 73.4% from the former. The inclusion of PVP in the IBU/PAN could effectively avoid the entrapment of IBU in the insoluble PAN molecules, facilitating the in vitro release of IBU. The modified coaxial process and the resulted multiple component nanocomposites would provide new way for developing novel drug sustained materials and transdermal drug delivery systems.