Studies of interactions between silane coupling agents and cellulose fibers with liquid and solid-state NMR

✍ Scribed by Marie-Christine B. Salon; Guillaume Gerbaud; M. Abdelmouleh; Cécile Bruzzese; Sami Boufi; Mohamed N. Belgacem

• Publisher: John Wiley and Sons
• Year: 2007
• Tongue: English
• Weight: 466 KB
• Volume: 45
• Category: Article
• ISSN: 0749-1581
• DOI: 10.1002/mrc.1994

✦ Synopsis

Abstract

The hydrolysis of three alkoxy‐silane coupling agents, γ‐methacryloxypropyl trimethoxy silane (MPS), γ‐aminopropyl triethoxy silane (APS), and γ‐diethylenetriaminopropyl trimethoxy silane (TAS), was carried out in ethanol/water solutions (80/20 w/w) at different pH values and followed by ^1^H, ^13^C and ^29^Si NMR spectroscopy. Acidic media were found to stabilize the hydrolyzed forms. As expected, the formation of silanol groups was followed by their self‐condensation to generate oligomeric structures, yielding, ultimately, solid homopolycondensated structures, as analyzed by ^29^Si and ^13^C high‐resolution solid‐state NMR. Hydrolyzed MPS in acidic media was then successfully adsorbed onto a cellulose surface and the ensuing substrates submitted to thermal treatment at 110–120 °C under reduced pressure, in order to create covalent bonds between cellulose and the coupling agent. Copyright © 2007 John Wiley & Sons, Ltd.