NDLI: Bimodal SBA-15 and polymethylsilsesquioxane monoliths with regulated mesoporous structure and macroporosity

Content Provider	Springer Nature Link
Author	Shchipuv, Yury Postva, Irina Sarin, Sergei
Copyright Year	2015
Abstract	Two glycol-containing silanes, one of which included a methyl group attached directly to the silicon atom, were applied for a one-pot sol–gel synthesis of bimodal mesoporous SBA-15 and polymethylsilsesquioxane with macropores. It was performed in aqueous solutions of block copolymer P123 without resorting to acid or alkali at ambient condition. Ordered mesoporous SBA-15 with large surface area and high pore volume was prepared by means of tetrakis(2-hydroxyethyl)orthosilicate containing four hydrolyzable ethylene glycol residues and amorphous polymethylsilsesquioxane, by using tris(2-hydroxyethoxy)methylsilane). The former was templated by a hexagonal mesophase formed from spherical micelles of block copolymer after admixing the precursor, and the latter was prepared in a system in which this transformation did not take place. When both the silica precursors were used together, one could find distortion of the periodic mesoporous structure, aggravating with increasing the content of methyl-containing silane. Furthermore, a decrease of the diameter, surface area, and mesopore volume took place, whereas the surface area of macropores was increased and their pore volume and diameter were decreased. The introduced methyl groups made silica hydrophobic. It was demonstrated that bimodal polymethylsilsesquioxane possessed fast and selective absorbability to oil spill on the water surface.
Starting Page	3369
Ending Page	3380
Page Count	12
File Format	PDF
ISSN	0303402X
Journal	Colloid and Polymer Science
Volume Number	293
Issue Number	11
e-ISSN	14351536
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2015-09-01
Publisher Place	Berlin/Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Silane with ethylene glycol residues Bimodal SBA-15 Polymethylsilsesquioxane Superhydrophobic Oil absorbent Polymer Sciences Soft and Granular Matter, Complex Fluids and Microfluidics Characterization and Evaluation of Materials Physical Chemistry Food Science Nanotechnology and Microengineering
Content Type	Text
Resource Type	Article
Subject	Colloid and Surface Chemistry Materials Chemistry Physical and Theoretical Chemistry Polymers and Plastics

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