Abstract
Vinyl ester of 4-carboxyphenylboronic acid has been synthesized and tested as reactive reagent for permanent fixation of boron in wood based on an improved approach described previously. The essence of the method is a covalent incorporation of the boron compound via transesterification between wood hydroxyl groups and vinyl ester containing boron. The synthesis of this vinyl ester was accomplished by exchange reaction of vinyl acetate with 4-carboxyphenylboronic acid. The obtained vinyl ester of carboxyphenylboronic acid was characterized by FTIR and 1H-, and 13C-NMR spectroscopy. The covalent fixation of boron to wood’s hydroxyl groups was achieved through potassium carbonate (K2CO3) catalyzed transesterification of the vinyl ester containing boron. The transesterification was confirmed by weight percentage gain (WPG) calculation, curcumin staining, FTIR, and 13C CP-MAS NMR spectroscopy. The efficiency of the reaction improved with increasing temperature and reaction time.
Acknowledgments
We gratefully acknowledge Dinesh Fernando and Jongsik Kim from the department of Forest Products, Swedish university of Agricultural Sciences (Sweden) for photos and microscopy observations. Furthermore, we thank Dmitri Panov from Faculty of Science and Technology, Institute of Chemistry, Tartu University (Estonia) for liquid NMR analyses.
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Articles in the same Issue
- Frontmatter
- Original Articles
- Elucidation of LCC bonding sites via γ-TTSA lignin degradation: crude milled wood lignin (MWL) from Eucalyptus globulus for enrichment of lignin xylan linkages and their HSQC-NMR characterization
- The impact of ionic strength on the molecular weight distribution (MWD) of lignin dissolved during softwood kraft cooking in a flow-through reactor
- Distinction of four Dalbergia species by FTIR, 2nd derivative IR, and 2D-IR spectroscopy of their ethanol-benzene extractives
- Content and distribution of lignans in Taiwania cryptomerioides Hayata
- Superior cellulose-protective effects of cosolvent during enhanced dissolution in imidazolium ionic liquid
- Hydrophobisation of wood surfaces by combining liquid flame spray (LFS) and plasma treatment: dynamic wetting properties
- Parametric study on the capability of three-dimensional finite element analysis (3D-FEA) of compressive behaviour of Douglas fir
- Dynamic viscoelastic properties of Chinese fir (Cunninghamia lanceolata) during moisture desorption processes
- Influence of incubation time on the vibration and mechanic properties of mycowood
- Fatigue behavior of wood-fiber-based tri-axial engineered sandwich composite panels (ESCP)
- Covalent fixation of boron in wood through transesterification with vinyl ester of carboxyphenylboronic acid
- Effect of fungal competition on decay rates in bicultured soil bottle assays
Articles in the same Issue
- Frontmatter
- Original Articles
- Elucidation of LCC bonding sites via γ-TTSA lignin degradation: crude milled wood lignin (MWL) from Eucalyptus globulus for enrichment of lignin xylan linkages and their HSQC-NMR characterization
- The impact of ionic strength on the molecular weight distribution (MWD) of lignin dissolved during softwood kraft cooking in a flow-through reactor
- Distinction of four Dalbergia species by FTIR, 2nd derivative IR, and 2D-IR spectroscopy of their ethanol-benzene extractives
- Content and distribution of lignans in Taiwania cryptomerioides Hayata
- Superior cellulose-protective effects of cosolvent during enhanced dissolution in imidazolium ionic liquid
- Hydrophobisation of wood surfaces by combining liquid flame spray (LFS) and plasma treatment: dynamic wetting properties
- Parametric study on the capability of three-dimensional finite element analysis (3D-FEA) of compressive behaviour of Douglas fir
- Dynamic viscoelastic properties of Chinese fir (Cunninghamia lanceolata) during moisture desorption processes
- Influence of incubation time on the vibration and mechanic properties of mycowood
- Fatigue behavior of wood-fiber-based tri-axial engineered sandwich composite panels (ESCP)
- Covalent fixation of boron in wood through transesterification with vinyl ester of carboxyphenylboronic acid
- Effect of fungal competition on decay rates in bicultured soil bottle assays