Preparation of porous thin-film polymethylsiloxane microparticles in a W/O emulsion system
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Abstract
Porous thin-film polymethylsiloxane microparticles have been prepared successfully from octyltrichlorosilane and methyltrichlorosilane in (water/oil) W/O emulsion systems by using several oil phases and changing the amount of the silanes or of the surfactant Span 60. Hollow microspheres of various shell thicknesses (120-180 nm) and high surface area were prepared by using four types of nonpolar solvents as the oil phase of the W/O emulsion system. The diameter of the spheres can also be controlled (1-1.6 mu m) by using different oil phases. The results of thermal analysis, nitrogen adsorption isotherm, infrared spectra and X-ray diffraction data showed that hollow microspheres of amorphous polymethylsiloxane with high surface area (360-385 m(2)g(-1)) can be obtained by heating the spheres in air at 673 K; the polymethylsiloxane microspheres become nonporous silica particles after calcination at 873 K for 3 h. Cup-shape microparticles of polymethylsiloxane with nano-order thickness (20-120 nm) were prepared by reducing the amount of silanes in the mixture. Small hollow particles were prepared by replacing a portion of the octyltrichlorosilane with Span 60.
Article
POLYMER JOURNAL. 47(6): 449-455 (2015)
Journal
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- POLYMER JOURNAL
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POLYMER JOURNAL 47 (6), 449-455, 2015
NATURE PUBLISHING GROUP
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Details 詳細情報について
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- CRID
- 1050001338927185152
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- NII Article ID
- 120007100495
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- NII Book ID
- AA00777013
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- ISSN
- 00323896
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- HANDLE
- 10091/00020341
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- NDL BIB ID
- 026424069
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- Text Lang
- en
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- Article Type
- journal article
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- Data Source
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- IRDB
- NDL
- CiNii Articles