Silane adsorption onto cellulose fibers: hydrolysis and condensation reactions.
The hydrolysis of three alkoxysilane coupling agents, gamma-methacryloxypropyltrimethoxysilane (MPS), gamma-aminopropyltriethoxysilane (APS), and gamma-diethylenetriaminopropyltrimethoxysilane (TAS), was carried out in an ethanol/water (80/20) solution and followed by 1H, 13C, and 29Si NMR spectroscopy, which showed that its rate increased in the order MPS < APS < TAS. The formation of the silanol groups was followed by their self-condensation to generate oligomeric structure. APS and MPS only gave soluble products, whereas colloidal particles precipitated in the medium when TAS was hydrolyzed. Pristine and hydrolyzed MPS were then adsorbed onto a cellulose substrate and thereafter a thermal treatment at 110-120 degrees C under reduced pressure was applied to the modified fibers to create permanent bonding of the coupling agent at their surface.
Salon
Marie-Christine Brochier
MC
LGP2, Ecole Française de Papeterie et des Industries Graphiques (INPG), BP 65, Domaine Universitaire, St. Martin d'Hères, France.
Abdelmouleh
Makki
M
Boufi
Sami
S
Belgacem
Mohamed Naceur
MN
Gandini
Alessandro
A
D000327:Adsorption; D002482:Cellulose / Q000737:chemistry*; D006868:Hydrolysis; D009682:Magnetic Resonance Spectroscopy / Q000379:methods / Q000592:standards; D008689:Methacrylates / Q000737:chemistry*; D015394:Molecular Structure; D011437:Propylamines; D012015:Reference Standards; D012821:Silanes / Q000737:chemistry*; D013499:Surface Properties; D013696:Temperature
D008689:Methacrylates; D011437:Propylamines; D012821:Silanes; C514858:diethylenetriaminopropyltrimethoxysilane; C017492:methacryloxypropyltrimethoxysilane; D002482:Cellulose; C477625:amino-propyl-triethoxysilane