YANG, Guang-zhi and XU, Ri-sheng and CHEN, Min and WANG, Xia and LING, Li-cheng and ZHANG, Rui and YANG, Jun-he (2008) Hollow carbon nanospheres prepared by carbonizing polymethylmethacrylate/polyacrylonitrile core/shell polymer particles. New Carbon Materials, 23 (3). 205 - 208.
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Official URL: http://www.sciencedirect.com/science/article/B8H10...
Hollow carbon nanospheres (HCNs) were synthesized by carbonizing fine core/shell particles of polymethylmethacrylate (PMMA)/polyacrylonitrile (PAN). The PMMA/PAN core/shell particles were prepared using two-stage soapless emulsion polymerization. PMMA spheres with a diameter of approximately 200 nm were first synthesised by batch mode polymerization and then a PAN shell with a thickness of approximately 30 nm was polymerized on the surface of PMMA spheres by drop-wise addition of acrylonitrile monomer. After freeze drying, PMMA/PAN composite particles were stabilized in air at 250 °C and then carbonized in nitrogen at 1000 °C. Transmission electron microscopy of the final sample showed that all PMMA cores turned into pores and all PAN shells developed into carbon shells. The PMMA/PAN composite particles were converted to HCNs with some adhering with each other and some breaking of the carbon shells.
|Uncontrolled Keywords:||Hollow carbon nanospheres; Core/shell; Heat treatment|
|Subjects:||Material Science > Nanofabrication processes and tools|
Material Science > Nanostructured materials
|Deposited On:||22 Apr 2010 11:12|
|Last Modified:||22 Apr 2010 11:12|
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