Please use this identifier to cite or link to this item:
|metadata.revistascielo.dc.title:||Eucalyptus grandis BARK TANNINS REATIVITY TO PRODUCE ADHESIVES|
|metadata.revistascielo.dc.creator:||Carneiro, Angélica de Cássia O.|
Vital, Benedito Rocha
Pimenta, Alexandre Santos
Mori, Fábio Akira
|metadata.revistascielo.dc.subject:||Tannins, adhesives, Eucalyptus grandis|
|metadata.revistascielo.dc.description:||The work objectived to study the reactivity of the tannins of the bark of Eucalyptus grandis to paraformaldehyde at different pH values, time of hydrolisis and sulphitezation and to produce tannics adhesives for wood. It was observed that the best gel-time was obtained with tannins sulphited at pH 3, with 3% of sulphite and time of reation of 90 minutes. Sulphited tannins in pH equal to 2 had the worst results, therefore, adesives with pH of formulations lower than 3 should not be used. The best tannic adhesive was that produced with tannins hydrolised and sulphited to which were added 5% of extender and 5% of filler. Adhesives produced with sulphited tannins presented the worst results.|
|Appears in Collections:||CERNE|
Files in This Item:
There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.