نوع مقاله : مقاله پژوهشی
نویسنده
گروه علوم و صنایع چوب و کاغذ، دانشکده منابع طبیعی، دانشگاه تهران، کرج، ایران
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسنده [English]
In this study, the effect of plasma modification on improving the adhesion resistance of solvent-borne and waterborne polyurethane coatings in wood was evaluated. For this purpose, wood samples of poplar with a moisture content of 8% and dimensions of 2×10×15 (L×R×T) mm were prepared and their surfaces treated with plasma for 60, 120, 300 and 600 seconds. Then, the surfaces were coated with a solvent and waterborne polyurethane coatings and they were measured by a Pull-off adhesive strength. The results of the contact angle test indicate that the plasma treatment reduced the contact angle and increase the wettability of wood surface. Also, the results of adhesion test after plasma treatment showed that the lowest and highest parameter were related to the solvent-borne (2.9 Mpa) and waterborne (3.4 Mpa) coating respectively, one of the effective factors is increase the surface hydrophilicity of wood by plasma treatment. Plasma treatment had a significant effect on increasing adhesion, so that the adhesion is improved with increasing treatment time, and the highest change in the plasma's effect per unit time was the 60-second. Thus, it can be claimed that the ability of plasma treatment to improve the adhesion of coatings depends on the type of coating resin and plasma treatment time.
کلیدواژهها [English]
10. غ. معنوی، م. غفرانی، س. میرشکرایی، بررسی تاثیر نوع، درصد رطوبت چوب و نوع رنگ بر روی مقاومت چسبندگی کششی رنگ های شفاف رایج در صنایع مبلمان. تحقیقات علوم چوب و کاغذ ایران، 27 (1391)، 753-743.
11.آ. طلایی، م. رضوانی، ه. دوست محمدی، بررسی مقاومت چسبندگی پوششهای شفاف آلکیدی و نیتروسلولزی در فرآیندهای مختلف اصلاح گرمایی چوب صنوبر. نشریه علمی علوم و فناوری رنگ. 12 (1397)،
180-171.
12.H. Taghiyari, Nano-zycosil in MDF: Gas and liquid permeability. Eur J Wood Prod, 71(2013), 353-360.
13.S. Wang, C. Liu, G. Liu, M. Zhang, J. Li, C. Wang, Fabrication of superhydrophobic wood surface by a sol-gel process. Appl. Surf. Sci. 258 (2011), 806-810.
14.H. Ma, D. Li, Ch. Liua, Zh. Huang, D. He, Q. Yan, P. Liua, Ph. Nash, D. Shena, An investigation of (NaPO3)6 effects and mechanisms during micro-arc oxidation of AZ31 magnesium alloy. Surf. Coat. Tech. 266 (2015), 151-159.
15.A. Fahmy, J. Friedrich, F. Poncin-Epaillard, D. Debarnot, Plasma polymerized allyl alcohol/O2 thin films embedded with silver nanoparticles. Thin Solid Films. 616 (2016), 339-347.
16.A. Y. Nikiforov, X. Deng, I. Onyshchenko, D. Vujosevic, V. Vuksanovic, U. Cvelbar, N. De Geyter, R. Morent, C. Leys, Atmospheric pressure plasma deposition of antimicrobial coatings on non-woven textiles. Eur. Phys. J. Appl. Phys. 75 (2016), 24710.
17.A. Wolkenhauer, G. Avramidis, E. Hauswald, H. Militz, W. Viöl, Plasma treatment of wood-plastic composites to enhance their adhesion properties. J. Adhes. Sci. Technol. 22 (2008), 2025-2037.
18.P. Rehn, A. Wolkenhauer, M. Bente, S. Förster, W. Viöl, Wood surface modification in dielectric barrier discharges at atmospheric pressure. Surf. Coat. Technol. 174 (2003), 515-518.
19.B. Riedl, C. Angel, J. Prégent, P. Blanchet, L. Stafford, Effect of wood surface modification by atmospheric-pressure plasma on waterborne coating adhesion. BioResources. 9 (2014), 4908-4923.
20.V. Blanchard, P. Blanchet, B. Riedl, Surface energy modification by radiofrequency inductive and capacitive plasma at low pressures on sugar maple: An exploratory study. Wood Fiber Sci. 41 (2009), 245-254.
21.M. N. Acda, E. E. Devera, R. J. Cabangon, H. J. Ramos. Effect of plasma on adhesion properties of wood. Int. J. Adhes. Adhes. 32 (2012), 70-75.
22.D. Lukowsky, G. Hora, Pretreatments of wood to enhance the performance of outdoor coatings. Macromol. Symp. 187 (2002), 77-85.
23.M. D. Meijer, Review on the durability of exterior wood coatings with reduced VOC-content. Prog. Org. Coat. 43 (2001), 217-225.
24.P. D. Evans, S. Vollmer, J. D.W. Kim, G. Chan, S. Kraushaar Gibson, Improving the performance of clear coatings on wood through the aggregation of marginal gains. Coat. 6 (2016), 66-75.
25.V . Rijckaert, M. Stevens, J. Van Acker, Effect of some formulation parameters on the penetration and adhesion of water-borne primers into wood. Eur. J. Wood Wood Prod. 59 (2001), 344–350.
26.J. G. Haase, L. H. Leung, P. D. Evans, Plasma pre-treatments to improve the weather resistance of polyurethane coatings on black spruce wood. Coatings. 9 (2019), 1-14.