Studies on Moisture Excluding Effectiveness of Different Finishes on <I>Michelia champaca</I> and <I>Terminalia myriocarpa</I> Woods under Absolute Humid Conditions

Nagaraj Hegde; Erique Zonunsanga; Suresh Kumar

doi:10.36808/if/2018/v144i11/141215

Studies on Moisture Excluding Effectiveness of Different Finishes on Michelia champaca and Terminalia myriocarpa Woods under Absolute Humid Conditions

Authors

Nagaraj Hegde Department of Forestry, Mizoram University, Tanhril, Aizawl
Erique Zonunsanga Department of Forestry, Mizoram University, Tanhril, Aizawl
Suresh Kumar Department of Forestry, Mizoram University, Tanhril, Aizawl

DOI:

https://doi.org/10.36808/if/2018/v144i11/141215

Keywords:

MEE, Michelia champaca, Terminalia myriocarpa, PU, Varnish, Wudfin

Abstract

A study was conducted to assess the moisture excluding effectiveness (MEE) of different wood finishes on the surface of wood samples of Michelia champaca and Terminalia myriocarpa under absolute humidity conditions. Majority of the treated samples showed lower values of weight gain in the range of 12.66% to 52.03% and 20.75% to 43.31% in Michelia champaca and Terminalia myriocarpa respectively after 72 hours of exposing to absolute humidity. Highest weight gain was recorded in untreated samples of both the species. In Michelia champaca, coatings of wudfin accounted for highest weight gain of 52.03% followed by varnish and polyurethane and lowest weight gain of 12.66 % was recorded in paint coatings making it most effective in blocking moisture entry. In Terminalia myriocarpa, coatings of wudfin accounted for highest weight gain of 43.31% followed by varnish and polyurethane and lowest weight gain of 20.75 % was recorded in paint coatings making it most effective in blocking moisture entry. Lowest percentage volumetric swelling in Michelia was recorded in paint coatings where as that in Terminalia was recorded in varnish coatings. Paint coatings showed better MEE comparatively in both the species. However, polyurethane and varnish can also be preferred as they showed comparable results.

References

Badoni S.P., Gupta S.B. and Shukla K.S. (1990) Preliminary studies on ammonia fumigation. J. Timber Development Association, 36 (2): 24-30.

Badoni S.P., Shukla K.S. and Sharma S.N. (1990). Wood finishing some aspect. In: Third Forest Product Conference held on 26-28 June at F.R.I. Dehradun.

Badoni S.P. and Shukla K.S. (1990). Recent surface improvement techniques using ammonia fumigation-bark extract treatment for various pre-finished woods. In: Seminar on Social Agro Forestry Timbers. Dec, 19-21, F.R.I. Dehradun.

Black J.M. and Mraz E.A. (1974). Inorganic surface treatments for Weather- resistant Natural Finishes. Res. Pap. FPL-232., USDA, Forest Service, Forest Products Laboratory, Madison, USA.

Cassens D.L. and Feist W.C. (1980). Wood finishing: Finishing exterior plywood, hardboard and particle board. North Central region Extension Pub. 132pp. Purdue University, Cooperative Extension Service, West Lafayette.

Chang H.T. and Chang S.T. (2002). Moisture excluding efficiency and dimensional stability of wood improved by acylation. Bioresource Technology, 85 (2): 201-204.

Feist W.C. and Mraz E.A. (1980). Performance of mildewcides in a semitransparent stain wood finish. Forest Products Journal, 30 (5): 43-46.

Feist W.C. and Hon D.N.S. (1984). Chemistry of weathering and protection. 401-451pp. In: The chemistry of solid wood. Advances in Chemistry (Rowell, R.M., (ed.), Series No. 207: American chemical society, Washington DC.

Garth D.H. and Sarah K.F. (2008). In Situ Moisture Testing of Building Products as a Predictor of Actual Conditions. In: Proceedings of the BEST I: 1-12.

Graystone J.A. and Ekstedt T.J. (1998). Current views on the role of water in the behavior of coated wood substrates. In Proceedings of the PRA Conference on Advances in Exterior Wood Coatings and CEN Standardization, Paper 6, Brussels: 1-15.

Jain J.D., Guru R.D. and Singh R. (2000). Physical and mechanical properties of Mangifera indica and Syzygium sp. from Dehra Dun. Indian Forester, 126(9): 948-959.

Rajput S.D., Mahulikar P.P. and Gite V.V. (2014). Biobased dimer fatty acid containing two pack polyurethane for wood finished coatings. Progress in Organic Coatings, 77: 38-46.

Ramana P., Nagaraj Hegde, Chandrakant H.H and Patil S.K. (2010). Studies on effect of different finishes of Holigarna arnottiana in controlling moisture entry. In: Compendium of seminar on Tropical Ecosystems: Structure, Function and Services. IFGTB, Coimbatore.

Sachin G., Sharma A. and Kumar K.V.S. (2008). The effect of different number of coatings on gloss and in controlling moisture entry into mango wood. Current Science, 94 (9): 1128-1129.

Sawmliana M. (2013). The book of Mizoram plants. P. Zakhuma, Chanmari West, Aizawl, Mizoram. 151-162 pp.

Sharma A. (2007). Effect of number of Coatings of Spirit Polish on Water Uptake Capacity and Gloss on Mango Wood (Mangifera indica) Surface. M.Sc. Dissertation, F.R.I. University, Dehra Dun.

Shukla K.S. and Gupta S.B. (1983). Finishing quality of some Indian timbers. Indian Forester, 109 (2); 80-90.

Williams R.S. and Feist W.C. (1996). Water repellents and waterrepellent preservatives for wood. 320-339 pp.

Williams R.S. (2001). Effect of water repellent preservatives and other wood treatments on restoration and durability of millwork. In Proceedings: Ninety-seventh Annual Meeting of the American Wood-Preservers' Association... Minneapolis, Minnesota, May 20-23, 2001. Granbury, Tex.: The Association, c2001: 84-103.