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Synthesis of composite eccentric double-shelled hollow spheres

✍ Scribed by Jianjun Li; Shujiang Ding; Chengliang Zhang; Zhenzhong Yang

Publisher
Elsevier Science
Year
2009
Tongue
English
Weight
663 KB
Volume
50
Category
Article
ISSN
0032-3861

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✦ Synopsis

Eccentric double-shelled hollow polyethylacrylate (PEA)/polystyrene (PS) crosslinked composite spheres were synthesized by phase separation during swelling polymerization of their mother polymer hollow spheres. The group -NH 2 was introduced within the network by ammonization of PEA. Other materials for example silica could be favorably grown within the gel network by a sol-gel process. The polymer/ silica hollow spheres gave the corresponding derivative hollow spheres with varied composition including SiO 2 /carbon, carbon and b-SiC, with the eccentric double-shelled morphology retained.

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## Abstract Double‐shelled Mn~2~O~3~ hollow spheres have been successfully prepared on a large scale by using core‐shell‐structured MnCO~3~ microspheres as sacrificial templates. This new method is based on an inward oxidation/etching treatment and sequential heat treatment in air. The as‐prepared