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Items for "chemical modification"

Chemical reaction of maritime pine sapwood (Pinus pinaster Soland) with alkoxysilane molecules: A study of chemical pathways

The chemical modification of maritime pine sapwood (Pinus pinaster) with alkoxysilanes was studied according to three different pathways: carbamoylation with 3-isocyanatopropyltriethoxysilane, etherification with 3-glycidoxypropyltrimethoxysilane and alcoholysis of n-propyltrimethoxysilane...

Keywords: alkoxysilanes, chemical modification, dimensional stabilisation, FTIR, solid NMR spectroscopy, wood

08/2004 | Holzforschung, Walter de Gruyter
Thermal forming of chemically modified wood to make high-performance plastic-like wood composites

Chemically modified wood composites were obtained via the compression moulding of thermoplasticised Aspen (Populus tremula) sawdust...

Keywords: chemical modification, compression moulding, non-conventional technology, oligoesterification, physical and mechanical properties, thermoplasticised wood, wood-fibre/plastic composites

08/2004 | Holzforschung, Walter de Gruyter
Functionalisation of wood by reaction with 3-isocyanatopropyltriethoxysilane: Grafting and hydrolysis of the triethoxysilane end groups

The chemical modification of maritime pine sapwood (Pinus pinaster Soland) with 3-isocyanatopropyltriethoxysilane (IPTES) and its subsequent hydrolysis were investigated...

Keywords: 13C and 29Si nuclear magnetic resonance cross-polarisation with magic-angle spinning (NMR CP MAS) spectroscopy, chemical modification, 3-isocynatopropyltriethoxysilane, Fourier-transform infrared spectroscopy, silane, wood

07/2005 | Holzforschung, Walter de Gruyter
Preparation of acetoacetylated wood meal and its properties. Part 1. Preparation of parameter and preliminary evaluation of the antifungal activity

Acetoacetylated wood meal (AAWM) was prepared and a preliminary evaluation of its antifungal activity was carried out...

Keywords: acetoacetylation, antifugal test, chemical modification, diketene, ?-ketoester

03/2006 | Holzforschung, Walter de Gruyter
Preparation of acetoacetylated wood meal and its properties. Part 2. Copper ion fixation by acetoacetylation

Fixation of copper ions to acetoacetylated wood meal (AAWM) was conducted in Cu(OAc)2-MeOH solution...

Keywords: acetoacetylation, chemical modification, copper, diketene, ?-ketoester, leaching test

03/2006 | Holzforschung, Walter de Gruyter
Chemical reaction of alkoxysilane molecules in wood modified with silanol groups

Chemical reaction between silanol-modified wood and methyltrimethoxysilane (MTMS) was carried out using two different approaches with dibutyltin dilaurate (DBTDL) or ethylamine (EtNH2) as catalysts...

Keywords: alkoxysilanes, 13C and 29Si CP-MAS NMR, chemical modification, FTIR Spectroscopy, SEM-EDX analysis, silanol groups, wood

05/2006 | Holzforschung, Walter de Gruyter
Polycarboxylic acids as non-formaldehyde anti-swelling agents for wood

Wood specimens of fir (Abies alba Mill) and beech (Fagus sylvatica L.) were chemically modified using polycarboxylic acids (PCA), cured by convection heating or microwave treatment and analyzed by HPLC...

Keywords: 1,2,3,4-butanetetracarboxylic acid (BTCA), chemical modification, citric acid (CA), HPLC, microwave treatment, non-formaldehyde agents

07/2006 | Holzforschung, Walter de Gruyter
Effect of treatments with 1,3-dimethylol-4,5-dihydroxy-ethyleneurea (DMDHEU) on the tensile properties of wood

The thin-veneer strip technique was applied to investigate the modifying effects of 1,3-dimethylol-4,5-dihydroxyethyleneurea (DMDHEU) on the tensile strength of wood...

Keywords: chemical modification, DMDHEU, scanning electron microscopy, tensile strength, wood degradation

01/2007 | Holzforschung, Walter de Gruyter
A novel simple route to wood acetylation by transesterification with vinyl acetate

A novel method for the acetylation of wood was investigated and compared with the classical method based on acetic anhydride...

Keywords: 13C CP-MAS NMR spectroscopy, chemical modification, FTIR Spectroscopy, transesterification, vinyl acetate, wood

03/2007 | Holzforschung, Walter de Gruyter