Multifunctional Composite Nanoflbers
Recent advances in nanotechnology have greatly expedited the development of the new generation of multifunctional nanomaterials. The physical and chemical properties of these nanomaterials,which usually exist in particle form,are extremely sensitive to the change in the environment such as temperature,pressure,electric field,magnetic field,optical wavelength,and adsorbed gas molecules. To facilitate the translation of these functions to higher order structures the nanoparticles are mixed with a polymer solution and converted to composite nanoflbers. In this presentation the approach of translating functions from nanoparticles to advanced fibrous structures by the co-electrospinning process will be presented. As an example of multifunctional material the electrical conductivity and magnetic properties of Fe3O4/C electrospun composite nanofiber will be demonstrated. Specifically polyacrylonitrile (PAN) solutions containing (10 wt％ Fe3O4) magnetite nanoparticles were electrospun and pyrolized at two different temperatures. The electrical conductivity of the composite nanofibrous structures were measured using four-point probe method and the magnetic properties were also obtained using Superconducting Quantum Interference Devices (SQUID). Electromagnetic composite nanofiber with the electrical conductivity of 9.2S/cm and saturation magnetization equal to 16emu/g was acquired. Raman,XRD,SEM and TEM were used for investigating the morphological characteristic of these electrospun composite nanoflbers.
Multifunction Composite nanoflbers Fe3O4 PAN Carbonization Superparamagnetic SQUID Electrical conductivity Raman XRD SEM TEM
Frank Ko Masoumeh Bayat Heejae Yang
Advanced Fibrous Materials Laboratory,University of British Columbia,Canada
国际会议
杭州
英文
5-10
2010-10-20（万方平台首次上网日期，不代表论文的发表时间）