Effects of eliagic acid and derivatives thereof on water repellency and dimensional stability


Citation

Przewloka S. R., . and Shearer B. J., . Effects of eliagic acid and derivatives thereof on water repellency and dimensional stability. pp. 132-138. ISSN 0128-1283

Abstract

Derivatives of the insoluble polyphenol ellagic acid and water soluble tetraguanidinium tetracholine tetrakis-benzyltrimethylammonium and tetrakis-tetramethylammonium eIlagates and 2 3 4 2 3 4-hexamethoxy-6 6-diisocyanato-diphenyl were prepared. The effects of these compounds upon water repellency and dimensional stability when impregnated into timber were examined. Water soluble ellagates improved water repellent effectiveness up to 32. Ellagic acid and 2 3 4 2 3 4hexamethoxy-6 6-diisocyanato-diphenyl increased initial swelling rates due to their solvent carriers. All trial compounds provided the timber wafers with additional dimensional stability predominantly by non-bonded non-leachable bulking. Generally a reduction in the extent but not the rate of moisture uptake was noted for the compounds investigated.


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Abstract

Derivatives of the insoluble polyphenol ellagic acid and water soluble tetraguanidinium tetracholine tetrakis-benzyltrimethylammonium and tetrakis-tetramethylammonium eIlagates and 2 3 4 2 3 4-hexamethoxy-6 6-diisocyanato-diphenyl were prepared. The effects of these compounds upon water repellency and dimensional stability when impregnated into timber were examined. Water soluble ellagates improved water repellent effectiveness up to 32. Ellagic acid and 2 3 4 2 3 4hexamethoxy-6 6-diisocyanato-diphenyl increased initial swelling rates due to their solvent carriers. All trial compounds provided the timber wafers with additional dimensional stability predominantly by non-bonded non-leachable bulking. Generally a reduction in the extent but not the rate of moisture uptake was noted for the compounds investigated.

Additional Metadata

[error in script]
Item Type: Article
AGROVOC Term: Timber
AGROVOC Term: Solvents
AGROVOC Term: Pinus radiata
AGROVOC Term: Water uptake
AGROVOC Term: Aliphatic acid derivatives
AGROVOC Term: Bulking agents
AGROVOC Term: Swelling
AGROVOC Term: Wetting agents
AGROVOC Term: Moisture content
AGROVOC Term: Capillary circulation
Depositing User: Ms. Suzila Mohamad Kasim
Last Modified: 24 Apr 2025 06:27
URI: http://webagris.upm.edu.my/id/eprint/21724

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