FluoroPOSS Monolayers Covalently Bound to a Silica Surface
Abstract
Recent studies have been increasingly utilizing fluoroalkyl-substituted Polyhedral Oligomeric SilSesquioxanes (POSS) molecules, known as fluoroPOSS, for producing non-wetting surfaces. Most commonly, (1H,1H,2H,2H-perfluorodecyl)8Si9O12 (fluorodecyl POSS, has been utilized for its extraordinarily low surface energy (=10 mN/m) and phase behavior in polymer blends. However, fluoroPOSS surfaces can seldom experience abrasion, or extended exposure to certain liquids, and still retain their non-wetting properties. A route to synthesize a functional fluoroPOSS molecule or monomer, with the ability to be covalently attached to a textured surface or polymer, is desired for the potential ability to develop a mechanically robust omniphobic surface. In the current study, mono-, di-, and tri-chlorosilanes tethered to a fluorodecyl POSS cage are synthesized via hydrosilylation of (vinyl, methyl) (1H,1H,2H,2H-perfluorodecyl)8Si9O13 POSS. Products are identified by NMR spectrometry. The synthesized monochlorosilyl-functional fluoroPOSS compound is subsequently used to treat silicon dioxide surfaces. Covalent attachment is confirmed by atomic force microscopy and dynamic contact angle analysis.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 21, 2010
- Accession Number
- ADA533421
Entities
People
- Joseph M Mabry
- Raymond Campos
- Sean M. Ramirez
- Timothy S. Haddad
Organizations
- Air Force Research Laboratory