Synthesis of ultrafine polymer nanofibers

The preparation of nanofibers with finer diameters is of great importance to meet the needs of nanomaterials in fabricating nano-devices. The diameter of polydivinylbenzene nanofibers can be reduced from 200 nm to 20-50 nm by adding a very small amount of oleic acid-capped Fe3O4 nanoparticles during the polymerization of divinylbenzene. Through ultrasonic disruption and magnetic separation of the nanofiber composites, we can obtain purified ultrafine nanofibers without Fe3O4 nanoparticles. The ultrafine nanofibers have widespread potential applications in nanomaterials and nano-devices with smaller requirements.