The effect of nano-copper oxide treatment on the colour change and loss of droplet contact angle on the sapwood of eastern cottonwood (Populus deltoides) after 180 days of natural weathering was investigated. Small clear samples were prepared, and vacuum impregnated with an aqueous suspension of nano-copper oxide at concentrations of 0·5, 1 and 1·5% nano copper. Treatment with nano-copper oxide decreased colour changes and loss of contact angle due to weathering. Colour change and contact angle loss decreased with increasing retentions of nano-copper oxide.
ASTM D 1413-07. 2007. Standard test method for wood preservatives by laboratory soil-block cultures. West Conshohocken, PA: ASTM International, pp. 215–21.
2.
ASTM D 5946-09. 2004. Is the ‘standard test method for corona-treated polymer films using water contact angle measurements’ (copyright ASTM International). West Conshohocken, PA: ASTM International.
3.
ASTM D2244-14. 2014. Standard practice for calculation of color tolerances and color differences from instrumentally measured color coordinates. Book of Standards Volume: 06·01.
4.
ClausenCA, GreenF and KartalSN. 2010. Weatherability and Leach Resistance of Wood Impregnated with Nano-Zinc Oxide.Nanoscale Research Letters, 5, pp. 1464–67.
5.
FreemanMH and McIntyreCR. 2008. A comprehensive review of copper based wood preservatives with a focus on new micronized or dispersed copper systems.Forest Products Journal, 58(11), pp. 6–27.
6.
HumarM, PeekRD and JermerJ. 2006. Regulations in the European Union with emphasis on Germany, Sweden, and Slovenia.In: Solo-GabrieleH, TownsendT, eds. Environmental impacts of preservative-treated wood. Boca Raton, FL: Taylor & Francis, pp. 37–57.
7.
KangHY, ParkSJ and KimYS. 2002. Moisture sorption and ultrasonic velocity of artificially weathered spruce.Mokchae Konghak, 30(1), pp. 18–24.
8.
KartalSN, GreenF and ClausenCA. 2009. Do the unique properties of nanometals effect leachability or efficacy against fungi and termites?International Biodeterioration and Biodegradation, 63, pp. 490–495.
9.
SahinHT and MantanisGI. 2011. Nano-based surface treatment effects on swelling, water sorption and hardness of wood.Maderas Ciencia y Tecnología, 13(1), pp. 41–48.
10.
StirlingR, DrummondJ, ZhangJ and ZiobroRJ. 2008. Micro-distribution of micronized copper in southern pine. The International Research Group on Wood Protection. IRG/WP 08-30479, 16 pp.
11.
TemizA, YildizUC, AydinI, EikenesM, AlfredsenG and OlakogluGC. 2005. Surface roughness and color characteristics of wood treated with preservatives after accelerated weathering test.Applied Surface Science, 250, pp. 35–42.
12.
WilliamsRS. 2005. Weathering of wood, Chapter 7, In: RowellR M, ed. Handbook of wood chemistry and wood composites. New York: CRC Press, pp. 139–85.
13.
ZhangJ, KamdemP and TemizA. 2009. Weathering of copper–amine treated wood.Applied Surface Science, 256, pp. 842–46.
