Journal
HIGH PERFORMANCE POLYMERS
Volume 24, Issue 3, Pages 229-236Publisher
SAGE PUBLICATIONS LTD
DOI: 10.1177/0954008311436221
Keywords
polyphosphazene; micro-nano spheres; hydrophobicity
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Funding
- National Natural Science Foundation of China [51003037]
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Novel fluorinated cross-linked polyphosphazene micro-nano spheres with controllable particle size ranging from 0.57 to 4.33 mu m were prepared by precipitation polymerization of hexachlorocyclotriphosphazene (HCCP) monomer. The formation of the non-porous micro-nano spheres was found to obey an oligomeric species-absorbing mechanism. The micro-nano spheres were characterized by scanning electron microscopy, Fourier transform infrared spectrometry, energy-dispersive X-ray spectroscopy, nuclear magnetic resonance imaging and X-ray diffraction. No glass-transition temperature of the spheres was observed and the onset of the thermal-degradation temperature was found to be 366 degrees C. It was found that a silicon wafer dip-coated with thus prepared micro-nano spheres had a water contact angle as high as 137 +/- 1.5 degrees. By changing such experimental conditions, as concentration of HCCP, temperature and ultrasonic power, the particle size of the polymeric micro-nano spheres can be controlled.
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