Preparation of silica/perfluoroalkyl methacrylate polymer inorganic/organic particles in supercritical carbon dioxide

Silica/perfluoroalkyl methacrylate polymer (PHDFDMA) particles were prepared using various types of silica by polymerization in supercritical carbon dioxide. There are three steps in the fabrication of inorganic/organic hybrid composites: silane treatment, polymerization, and soxhlet extraction. Aft...

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Bibliographic Details
Published in:Colloid and polymer science 2010-01, Vol.288 (1), p.63-72
Main Authors: Shin, Jungin, Cho, Dong Woo, Bae, Won, Kim, Hwayong
Format: Article
Language:English
Subjects:
Applied sciences
Characterization and Evaluation of Materials
Chemistry
Chemistry and Materials Science
Complex Fluids and Microfluidics
Composites
Exact sciences and technology
Food Science
Forms of application and semi-finished materials
Fused silica
Nanotechnology and Microengineering
Original Contribution
Particulate composites
Perfluoroalkyls
Physical Chemistry
Polymer industry, paints, wood
Polymer Sciences
Polymerization
Scanning electron microscopy
Shells
Silica gel
Silicon dioxide
Soft and Granular Matter
Technology of polymers
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Summary:Silica/perfluoroalkyl methacrylate polymer (PHDFDMA) particles were prepared using various types of silica by polymerization in supercritical carbon dioxide. There are three steps in the fabrication of inorganic/organic hybrid composites: silane treatment, polymerization, and soxhlet extraction. After these steps, we observed the morphology of silica/PHDFDMA particles using field emission scanning electron microscope and transmission electron microscope. From these analyses, we can confirm that the silica/PHDFDMA core/shell particles were obtained when we used Ludox and silica gel as a silica template. On the other hand, core/shell particles were not formed when using fused silica and precipitated silica. In addition, to confirm the amount of polymer on silica, we performed an analysis using thermogravimetric analysis and electron probe micro-analyzer. In this case, PHDFDMA was approximately 20 wt.% on the silica gel and 40 wt.% on the Ludox, respectively. When using fused silica and precipitated silica as a template, amount of PHDFDMA on silica was maximum 5 wt.% and over 40 wt.%, respectively. From these results, to obtain enough PHDFDMA encapsulated silica particle, colloidal silica, Ludox is the best template in four different types of silica.
ISSN:0303-402X
1435-1536
DOI:10.1007/s00396-009-2129-6