Journal
JOURNAL OF PHYSICAL CHEMISTRY C
Volume 114, Issue 19, Pages 8844-8850Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jp1020033
Keywords
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Funding
- Lamar University
- NSF [DMR 04-49022]
- Dan F. Smith Department of Chemical Engineering at Lamar University
- College of Engineering at Lamar University
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Both pure polyimide (PI) and Fe-FeO nanoparticles reinforced PI nanocomposite fibers with a particle loading of 5, 10, 20, and 30 wt % are produced by electrospinning with optimized operational parameters such as polymer concentration, applied electrical voltage, and tip-to-collector distance. The morphology of the resulting products is correlated to the corresponding rheological behaviors of the pure PI and Fe-FeO/PI nanocomposite solutions. Thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC) reveal an enhanced thermal stability of the nanocomposite fibers after introducing the Fe-FeO nanoparticles. The glass transition temperature (T-g) and melting temperature (T-m) of the nanocomposite fibers increase by 10-12 and 15-17 degrees C, respectively, as compared to those of the pure PI fibers. The magnetic properties of the Fe-FeO nanoparticles in the polymer nanocomposite fibers are different from those of the as-received nanoparticles. An increased shell thickness by 7.4% is deduced after the nanoparticles experiencing the high-voltage electrospinning.
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