EFFECTS OF ELLAGIC ACID AND DERIVATIVES THEREOF ON WATER REPELLENCY AND DIMENSIONAL STABILITY

Authors

  • S. R. Przewloka

Keywords:

Water repellency, dimensional stability, ellagic acid, Pinus radiata

Abstract

Derivatives of the insoluble polyphenolic ellagic acid and water soluble tetraguanidinium, tetracholine, tetrakis-benzyltrimethylammonium and tetrakis-tetramethylammonium ellagates 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’,4’- hexamethoxy-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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Published

2022-07-13

How to Cite

S. R. Przewloka. (2022). EFFECTS OF ELLAGIC ACID AND DERIVATIVES THEREOF ON WATER REPELLENCY AND DIMENSIONAL STABILITY. Journal of Tropical Forest Science (JTFS), 20(2), 132–138. Retrieved from https://jtfs.frim.gov.my/jtfs/article/view/1104

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Articles
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