Journal
MATERIALS
Volume 12, Issue 12, Pages -Publisher
MDPI
DOI: 10.3390/ma12122006
Keywords
cellulose; lignin; wood hydrofobization; catalyst reaction; silanization; aluminium acetylacetonate
Categories
Funding
- Polish Ministry of Science and Higher Education [2bH15 0037 83]
- Ministry of Science and Higher Education [507.423.55, 005/RID/2018/19]
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It can be found that reaction mechanisms and interactions between wood and organosilicone compounds have not been sufficiently explored. The aim of the study was to determine bonds formed between either cellulose or lignin and methyltrimethoxysilane (MTMOS) during a catalytic silanization reaction. Silanization was performed in the presence of two catalysts of a diverse mechanism of functionalization: aluminum acetylacetonate (Al(acac)(3)) and acetic acid (AcOH). For this purpose, FT-IR, C-13 and Si-29 NMR techniques were used. Cellulose silanization efficiency without a catalyst was unlikely. Lignin undergoes a silanization reaction with alkoxysilanes much easier than cellulose. The results showed new bonds between biopolymers and the silanising agent. The new bonds were confirmed by signals at the FT-IR spectra, e.g., 770 cm(-1) and 1270 cm(-1) (Si-CH3), and at the NMR signal coming from the T-1, T-2 and T-3 structures. Efficiency of reaction was confirmed by atomic absorption spectroscopy (AAS) analysis.
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