Effect of microwave plasma treatment on surface wettability of common teak wood

Abstract

The improvement of wood surface wettability can clearly improve bonding properties, as well as enhance physical and mechanical properties of wood composites. In our investigation, the microwave plasma (MWP) technique was adopted to treat the surface of common teak. The treatment effect was evaluated by measuring the contact angles of liquids and calculating the free surface energy. The results show that the modification effect improved when the sample was located 120 mm from the resonance cavity, rather than at 80 mm. A MWP treatment over a short span of time is useful to lower the contact angles and improve the surface wettability considerably. The range of decreasing contact angles, tested by water, could reach 74% at a distance of 120 mm.

Keywords

microwave plasma treatment / common teak / surface contact angle / surface wettability

References

[1] Cheng J Q, Yang J J, Liu P (1985). China-wood. Beijing: China Forestry Publishing House (in Chinese)

[2] Cheng R X, Gu J Y (2002). Wettability of larch, birch and oak. J Northeast For Univ, 30(3): 29-31 (in Chinese)

[3] Du G B, Hua Y K, Cui Y J (1999a). X-ray photoelectron spectroscopic (XPS) analysis of wood surface treatment with microwave plasma. Sci Silv Sin, 35(5): 104-109 (in Chinese)

[4] Du G B, Hua Y K, Wang Z (1998). Surface performance of chinese fir wood treated by microwave plasma. China Wood Ind, 12(6): 17-20 (in Chinese)

[5] Du G B, Hua Y K, Wang Z (1999b). Wood surface ablation under microwave plasma. Sci Silv Sin, 35(1): 95-99 (in Chinese)

[6] Du G B, Yang Z, Qiu J (2002). Study on Alnus nepalensis surface treated by microwave plasma with ESR. For Sci Tech Dev, 16(3): 28-31 (in Chinese)

[7] Huang H L, Lu X N, Xue L D (2006a). Bonding performance of bamboo plywood improved by O2 plasma treatment. J Zhejiang For Coll, 23(5): 486-490 (in Chinese)

[8] Huang H L, Xue L D, Lu X N (2006b). Effects of low temperature plasma treating on bonding strength of bamboo strip surface. J Nanjing For Univ (Nat Sci Ed), 30 (6): 23-26 (in Chinese)

[9] Li J, Duan X F, Liu Y X (1995). Surface modification of wood. J Northeast For Univ, 23(2): 95-101 (in Chinese)

[10] Liao B, An T Y, Wang Y S (2003b). Study on improving rubber surface wettability using microwave plasma. Surf Tech, 32(6): 22-24 (in Chinese)

[11] Liao B, An T Y, Wang Y S, Zhu S Z (2003a). A study of rubber surface modification using microwave plasma. J East China Nor Univ (Nat Sci), 2: 40-45 (in Chinese)

[12] Luo J J, Cao L (1998). Prospects of wood property improvement for the 21st century. World For Res, 3: 28-32 (in Chinese)

[13] Mei Y X, Tang X L (2006). The application of low-temperature plasma in surface modification of materials. Modern Phys, 16(3): 40-43 (in Chinese)

[14] Sheldon Q S, Douglas J G (2001). Dynamic adhesive wettability of wood. Wood Fiber Sci, 33(1): 58-68

[15] Wang F H, Liu Z M (2001). Research advance of the interface for wood-based material. J Northeast For Univ, 29(5): 84-87 (in Chinese)

[16] Zhang H J, Douglas J G, John Z W (1997). Surface tension, adhesive wettability, and bondability of artificially weathered CCA-treated southern pine. For Prod J, 47(10): 69-72

Acknowledgement

This project was financially supported by the National Natural Science Foundation of China (Grant No. 39970696) and the Yunnan Province National Natural Science Foundation (No. 1999C0060M).

RIGHTS & PERMISSIONS

2014 Higher Education Press and Springer-Verlag Berlin Heidelberg