Increased pine tannins extraction and wood adhesives development by phlobaphenes minimization

@article{SealyFisher2007IncreasedPT,
  title={Increased pine tannins extraction and wood adhesives development by phlobaphenes minimization},
  author={Vanessa Jenifer Sealy-Fisher and Antonio Pizzi},
  journal={Holz als Roh- und Werkstoff},
  year={2007},
  volume={50},
  pages={212-220}
}
The phlobaphenes formation and precipation during sulphite/water extraction of pine tannins from pine bark was minimized by blocking tannin self-condensation by the addition of small amounts of a strong nucleophile such as phloroglucinol, m-phenylenediamine and urea, the latter due to its low cost for industrial application. These inhibitors reacted preferentially with the reaction intermediates formed in the tannins self-condensation mechanism, stopping the reaction reaching the molecular… 

Water Extraction of Tannins from Aleppo Pine Bark and Sumac Root for the Production of Green Wood Adhesives

The extraction of condensed tannins from Aleppo pine bark and sumac roots was examined in near industrial conditions, using a water medium in the presence of 2% NaHCO3 and 0.5% NaHSO3 at two different temperatures.

Wood adhesives fromPinus radiata bark

Conditions for extracting bark of radiata pine (Pinus radiata D. Don) were examined with the purpose of obtaining high yield and high quality extractives for wood adhesives. A four-stage squeeze

Spruce bark as an industrial source of condensed tannins and non-cellulosic sugars

Norway spruce (Picea abies) is an important raw material for the forest industry in Nordic countries. The chemical composition and hot water extraction of spruce bark was studied to find out its

Wood adhesives based on tannin extracts from barks of some pine and spruce species

Barks available in commercial quantities in Australia and overseas have been examined for their efficacy as raw materials for conversion to high quality adhesives for reconstituted wood products.

Influence of solvent additives on the aqueous extraction of tannins from pine bark: potential extracts for leather tanning

BACKGROUND Pine bark, which represents approximately 10 to 20% in weight of the tree trunk, is an abundant and low cost agro-industrial waste. In order to obtain condensed tannin-rich pine bark
...

References

SHOWING 1-10 OF 29 REFERENCES

Pine tannin adhesives for particleboard

  • A. Pizzi
  • Materials Science
    Holz als Roh- und Werkstoff
  • 2007
Pine tannin-based adhesive formulations suitable for the industrial manufacture of exterior grade particleboard are discussed. The formulations described are a combination of substantial amounts of

The Chemistry and Development of Pine Tannin Adhesives for Exterior Particleboard

Pine tannin-based adhesives obtained by the reaction of polymeric MDI (4,4'-diphenylmethane diisocyanate) with mildly sulphited pine tannin extract are described.Tolerance limits as regards moisture

The formulation and commercialization of glulam pine tannin adhesives in Chile

The results of fingerjointing and glulam industrial trials in Chile using a “honeymoon” fast-set adhesive system manufactured using commercially-produced mildly-sulphited pine tannin extract are

TANNIN-BASED WOOD ADHESIVES

Past efforts aimed at replacing the phenolic material in wood adhesives by tannins of various origins have been extensive throughout the world, with research activity normally paralleling the price

Chemical Nature of Phlobaphenes

Phlobaphenes are reddish-colored, water-insoluble phenolic substances that are believed to be related to co-occurring condensed tannins. The term is also used to describe the red insoluble material

Condensed tannins: preferential substitution at the interflavanoid bond by sulphite ion

The reaction of loblolly pine (Pinus taeda L.) bark tannins with sodium hydrogen sulphite gave sodium epicatechin-(4β)-sulphonate (1) and sodium epicatechin-(4β→ 8)-epicatechin-(4β)-sulphonate (2) in

Synthesis of condensed tannins. Part 14. Biflavanoid profisetinidins as synthons. The Acid-induced ‘phlobaphene’ reaction

Free-phenolic [4,6]- and [4,8]-2,3-trans-(–)-fisetinidol-(+)-catechin diastereoisomers of both 3,4-trans and 3,4-cis configuration, which serve as synthons for higher oligomers, are available in

Kinetics of acid-catalyzed cleavage of procyanidins

Abstract Comparisons of the rates of cleavage of isomeric procyanidin dimers in the presence of excess phenylmethane thiol and acetic acid showed that compounds with a C(4)–C(8) interflavanoid bond

Condensed tannins: quinone methide intermediates in procyanidin synthesis

Comparisons of acid- and base-catalysed reactions of epicatechin-(4β)-phenyl sulphide and leucocyanidin show that condensations proceed more rapidly at alkaline than at acidic pH so the biosynthesis

ZUR KENNTNIS DER CATECHIN‐GERBSTOFFE

Die Ubersicht uber die erweiterte Reihe der Hydroxyflavane I–XVIII, zu denen die Catechine (z. B. XIII) gehoren, zeigt erneut, das die gleichzeitige Anwesenheit von Hydroxylen in 7- und 4′-Stellung