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

  • Charles Baudouin Njine-Bememba , Gustave Kenne Dedzo , Charles Péguy Nanseu-Njiki und Emmanuel Ngameni EMAIL logo
Veröffentlicht/Copyright: 11. September 2014
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Holzforschung
Aus der Zeitschrift Holzforschung Band 69 Heft 3

Abstract

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 reagents 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 13C 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.

Keywords: aminosilanes; anion permselectivity; ayous sawdust; functionalization; sawdust film electrodes; stability; voltammetry
Corresponding author: Emmanuel Ngameni, Laboratoire de Chimie Analytique, Faculté des Sciences, Université de Yaoundé I, BP 812 Yaoundé, Cameroun, e-mail:

Acknowledgments

The authors acknowledge the support of AIRES-Sud [a program from the French Ministry of Foreign and Europeans Affairs, implemented by the Institut de Recherche pour le Développement (IRD-DSF)] and the Academy of Science for the Developing World (TWAS): TWAS Research Unit Grant No. 07-052LDC/CHE/AF/AC.

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Received: 2014-2-25
Accepted: 2014-8-13
Published Online: 2014-9-11
Published in Print: 2015-4-1

©2015 by De Gruyter

Artikel in diesem Heft

  1. Frontmatter
  2. Original Articles
  3. Characterization of dissolved lignins from acetic acid Lignofibre (LGF) organosolv pulping and discussion of its delignification mechanisms
  4. Organic materials in black liquors of soda-AQ pulping of hot-water-extracted birch (Betula pendula) sawdust
  5. Effects of concentration and temperature on the rheological behavior of concentrated sodium lignosulfonate (NaLS) solutions
  6. Raman microscopic analysis of wood after treatment with the ionic liquid, 1-ethyl-3-methylimidazolium chloride
  7. Isolation and structural elucidation of norlignan polymers from the heartwood of Cryptomeria japonica
  8. Effect of ball milling on lignin polyesterification with ε-caprolactone
  9. Property enhancement of kenaf fiber composites by means of vacuum-assisted resin transfer molding (VARTM)
  10. Wood polypropylene composites prepared by thermally modified fibers at two extrusion speeds: mechanical and viscoelastic properties
  11. Numerical analysis of temperature profiles during thermal modification of wood: chemical reactions and experimental verification
  12. Fast online NIR technique to predict MOE and moisture content of sawn lumber
  13. Numerical study of the influence of veneer lathe checks on the elastic mechanical properties of laminated veneer lumber (LVL) made of beech
  14. Amination of pretreated ayous (Triplochiton scleroxylon) sawdust with two organosilanes: characterization, stability, and permselective property
  15. Damage evolution in wood – pattern recognition based on acoustic emission (AE) frequency spectra
  16. Mechanical stability of superhydrophobic epoxy/silica coating for better water resistance of wood
  17. Short Note
  18. Urea-formaldehyde resin penetration into Pinus radiata tracheid walls assessed by TEM-EDXS
  19. Obituary
  20. Professor Dr. Arnis Treimanis
https://doi.org/10.1515/hf-2014-0058
Schlagwörter für diesen Artikel
aminosilanes; anion permselectivity; ayous sawdust; functionalization; sawdust film electrodes; stability; voltammetry

Artikel in diesem Heft

  1. Frontmatter
  2. Original Articles
  3. Characterization of dissolved lignins from acetic acid Lignofibre (LGF) organosolv pulping and discussion of its delignification mechanisms
  4. Organic materials in black liquors of soda-AQ pulping of hot-water-extracted birch (Betula pendula) sawdust
  5. Effects of concentration and temperature on the rheological behavior of concentrated sodium lignosulfonate (NaLS) solutions
  6. Raman microscopic analysis of wood after treatment with the ionic liquid, 1-ethyl-3-methylimidazolium chloride
  7. Isolation and structural elucidation of norlignan polymers from the heartwood of Cryptomeria japonica
  8. Effect of ball milling on lignin polyesterification with ε-caprolactone
  9. Property enhancement of kenaf fiber composites by means of vacuum-assisted resin transfer molding (VARTM)
  10. Wood polypropylene composites prepared by thermally modified fibers at two extrusion speeds: mechanical and viscoelastic properties
  11. Numerical analysis of temperature profiles during thermal modification of wood: chemical reactions and experimental verification
  12. Fast online NIR technique to predict MOE and moisture content of sawn lumber
  13. Numerical study of the influence of veneer lathe checks on the elastic mechanical properties of laminated veneer lumber (LVL) made of beech
  14. Amination of pretreated ayous (Triplochiton scleroxylon) sawdust with two organosilanes: characterization, stability, and permselective property
  15. Damage evolution in wood – pattern recognition based on acoustic emission (AE) frequency spectra
  16. Mechanical stability of superhydrophobic epoxy/silica coating for better water resistance of wood
  17. Short Note
  18. Urea-formaldehyde resin penetration into Pinus radiata tracheid walls assessed by TEM-EDXS
  19. Obituary
  20. Professor Dr. Arnis Treimanis
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