Journal
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
Volume 46, Issue 3, Pages 335-347Publisher
SPRINGER
DOI: 10.1007/s10971-008-1700-9
Keywords
silsesquioxanes; perfect 3-D nanobuilding blocks; 3-D star molecules; Janus silsesquioxanes; layer-by-layer coatings; spray coating
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Cubic silsesquioxanes (SQs) offer perfect and nearly perfect 3-D symmetry with eight functional groups with each functional group occupying a different octant in Cartesian space. This paper is concerned with the synthesis of both highly symmetrical octa-monofunctional SQs and statistically bifunctional SQs wherein because of similar properties each functionality separates to one side of the cubically symmetric SQ giving Janus-like behavior. In the latter case we find these materials to offer novel properties of use in making both coatings with controlled contact angles ranging from 50-120 degrees C, with hardnesses (pencil) as high as 6H and the opportunity to make layer-by-layer coatings.
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