Amination of pretreated ayous (Triplochiton scleroxylon) sawdust with two organosilanes: characterization, stability, and permselective property

作者：Njine Bememba Charles Baudouin; Dedzo Gustave Kenne; Nanseu Njiki Charles Peguy; Ngameni Emmanuel^*

来源：Holzforschung, 2015, 69(3): 347-356.

DOI：10.1515/hf-2014-0058

• aminosilanes
• anion permselectivity
• ayous sawdust
• functionalization
• sawdust film electrodes
• stability
• voltammetry

Sawdust samples of ayous wood (Triplochiton scleroxylon) have been submitted to a warm pretreatment with NaOH and functionalized in dimethylformamide (DMF) by grafting with two amino organosilanes. The re-agents were chosen for their ability to bind hydronium ions in acidic medium: 3-aminopropyltriethoxysilane (APTES) and 3-(2-aminoethyl)-3-aminopropyltrimethoxysilane (AEAPTMS). The resulting materials were characterized by Fourier transform infrared (FTIR) and C-13 nuclear magnetic resonance (NMR) spectroscopies, which revealed the Si-O-C covalent bond and the polymerization of the grafted silanes through siloxane bridges (Si-O-Si) leading to the stabilization of the structure. The cyclic voltammetry analyses were performed on a glassy carbon modified with native or functionalized sawdust films in contact with electrochemical probes ([Fe(CN)(6)](3-) and [Ru(NH3)(6)](3+)). By means of this method, the permselectivity and accumulation capacity of these functionalized materials could be evaluated. The presence of silanes in the functionalized sawdust leads to a progressive accumulation of anionic species, while the cationic species were repelled when the solution is gradually acidified.

• 出版日期2015-4