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مطالعه خستگی دمایی بر خواص ترک پذیری، چسبندگی و براقیت پوشش های چوب | ||
| تحقیقات علوم چوب و کاغذ ایران | ||
| مقاله 4، دوره 36، شماره 2 - شماره پیاپی 75، تیر 1400، صفحه 119-131 اصل مقاله (680.74 K) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22092/ijwpr.2021.352557.1647 | ||
| نویسندگان | ||
| هادی غلامیان* 1؛ احمد جاوید2 | ||
| 1استادیار، گروه علوم و صنایع چوب و کاغذ، دانشکده منابع طبیعی، دانشگاه تهران، کرج، ایران، | ||
| 2کارشناسی ارشد، گروه علوم و صنایع چوب و کاغذ، دانشکده منابع طبیعی، دانشگاه تهران، کرج، ایران | ||
| چکیده | ||
| در این تحقیق تاثیر سیکل حرارتی بر تخریب سطحی و ترکپذیری انواع پوششهای چوب تقویت شده با نانو ذرات رس و تغییرات خواص چسبندگی و براقیت بررسی گردید. از پوششهای پایه حلال (آلکیدی، پلییورتان)، پایه آب (کروم و فسفرسانس) و پایه روغنی (پوشش روغنی) در گونه چوبی نراد (Abies alba) استفاده شد. همچنین از تکنیکها و آزمونهای اندازه گیری ترکهای سطحی، چسبندگی کششی و براقیت سنج جهت آنالیز نتایج قبل و بعد از خستگی دمایی استفاده شد. نتایج نشان داد، بهترین عملکرد پوشش در هر سه آزمون چسبندگی کششی، براقیت سطح و ترکی سطحی مربوط به پوشش کروم و نامناسبترین، مربوط شد به پوشش آلکیدی میباشد. همچنین، نتایج نشان داد، استفاده از نانو ذرات رس قبل از سیکل حرارتی تفاوت چندانی در خواص پوشش نداشت اما بعد از سیکل حرارتی باعث افزایش مقاومت پوششها گردید. این افزایش مقاومت به چسبندگی در پوششهای کروم، فسفرسانس، روغنی، پلی یورتان و آلکیدی به میزان نزدیک به دو برابر مشاهده شد. بعلاوه استفاده از نانو ذرات رس توانست میزان ترکپذیری پوشش را در اثر خستگی دمایی کاهش و عملکرد پوششها را بهبود بخشد. | ||
| کلیدواژهها | ||
| ترک سطحی؛ چوب؛ چسبندگی؛ براقیت؛ سیکل حرارتی | ||
| عنوان مقاله [English] | ||
| Study of thermal fatigue on the cracking, adhesion and gloss properties of wood coatings | ||
| نویسندگان [English] | ||
| Hadi Gholamiyan1؛ Ahmad Javid2 | ||
| 1Assistant Professor, Department of Wood and Paper Science & Technology, Faculty of Natural Resources, University of Tehran, Karaj, Iran | ||
| 2MSc., Department of Wood and Paper Science & Technology, Faculty of Natural Resources, University of Tehran, Karaj, Iran | ||
| چکیده [English] | ||
| In this study, the effect of thermal cycle on surface degradation and crackability of wood coatings reinforced with clay nanoparticles and changes in adhesion and gloss properties were investigated. In this study, solvent-based coatings (alkyd, polyurethane), water-based coatings (chromium and phosphorescence) and oil-based coatings (oil-based coatings) were used in Abies alba wood species. Also, techniques and tests for measuring surface cracks, tensile adhesion and gloss meter were used to analyze the results before and after thermal fatigue. The results showed that the best coating performance in all three tests of tensile adhesion, surface gloss and surface crack is chrome coating and the most unsuitable of them is alkyd coating. Moreover, the results showed that the use of clay nanoparticles before the thermal cycle did not differ much in the properties of the coating, but after the thermal cycle increased the strength of the coatings. This increase in adhesion resistance in chromium, phosphorescence, oil, polyurethane and alkyd coatings was rate nearly doubled. In addition, the use of clay nanoparticles could reduce the crackability of the coating due to thermal fatigue and improve the performance of the coatings. | ||
| کلیدواژهها [English] | ||
| Surface cracking, wood, adhesion, gloss, thermal cycle | ||
| مراجع | ||
|
-Blanchard, V. and Blanchet, P., 2011. Color stability for wood products during use: Effects of inorganic nanoparticles. Bio Resources, 6(2), 1219-1229. -Chang, C.W., Kuo, W.L. and Lu, K.T., 2019. On the effect of heat treatments on the adhesion, finishing and decay resistance of Japanese cedar (Cryptomeria japonica D. Don) and Formosa acacia (Acacia confuse Merr. (Leguminosae) Forests, 10(7), 586. -Chin, J., Nguyen, T., Byrd, E. and Martin, J., 2005. Validation of the reciprocity law for coating photo degradation. JCT research, 2(7), 499-508. -Chou, P.L., Chang, H.T., Yeh, T.F. and Chang, S.T., 2008. Characterizing the conservation effect of clear coatings on photo degradation of wood. Bioresource technology, 99(5), 1073-1079. -Cristea, M.V., Riedl, B. and Blanchet, P., 2011. Effect of addition of nanosized UV absorbers on the physico-mechanical and thermal properties of an exterior waterborne stain for wood. Progress in organic coatings, 72(4), 755-762. -De Meijer, M. and Militz, H., 1998. Wet adhesion measurements of wood coatings. Holz als Roh und Werkstoff, 56, 306-306. -Ghosh, M., Gupta, S. and Kumar, V.S., 2015. Studies on the loss of gloss of shellac and polyurethane finishes exposed to UV. Maderas. Ciencia y tecnología, 17(1), 39-44. -Gupta, S., Singh, C.P. and Kumar, V.K., 2016. Gloss of four common wood coatings measured before and after their exposure to high humidity. Revista Ciência da Madeira (Brazilian Journal of Wood Science), 7(2). -Hang, T.T.X., Dung, N.T., Truc, T.A., Duong, N.T., Van Truoc, B., Vu, P.G., Hoang, T., Thanh, D.T.M. and Olivier, M.G., 2015. Effect of silane modified nano ZnO on UV degradation of polyurethane coatings. Progress in Organic Coatings, 79, 68-74. -Harandi, D., Ahmadi, H. and Mohammadi Achachluei, M., 2015. Evaluation of Color and Structural Changes in Wood Modified Nano-TiO2 and Nano-ZnO as UV Protection. Color. Technol. Journal of Color Science and Technology, 9, 207-216. -ISO 4628-4 (1982) Paints and vanishes—evaluation of degradation of paint coatings—designation of intensity, quantity and size of common types of defect. Part 4: designation of degree of cracking. -Kaygın, B. and Akgün, E., 2008. A nano-technological product: An innovative varnish type for wooden surfaces. -Kaygin, B. and Akgun, E., 2008. Comparison of conventional varnishes with Nanolacke UV varnish with respect to hardness and adhesion durability. International Journal of Molecular Sciences, 9(4), 476-485. -Khojasteh Khosro, S. 2014. Investigation on the effect of nano Zinc Oxide on physical properties of polyurethane clear coat in wooden furniture surfaces, degree of M.Sc, Shahid Rajaee Teacher Training University, Iran. 31(2), 362-373. -Khojasteh Khosro, S.K., 2015. The effect of adding zinc oxide nanoparticles on color change and adhesion strength of polyurethane coating on wood surface. Iranian Journal of Wood and Paper Science Research, 30(4), 690-704. -Kocaefe, D. and Saha, S., 2012. Comparison of the protection effectiveness of acrylic polyurethane coatings containing bark extracts on three heat-treated North American wood species: Surface degradation. Applied surface science, 258(13), 5283-5290. -Latibari, A.J., 2007. Science and technology of lignocellulose materials adhesion. Islamic Azad University, Karaj Branch, Publications. -Lei, H., Xu, T. and Gao, C., 2010. Characterization of the dispersion of tetrapod-like nano-ZnO whiskers in acrylic resin and properties of the nano-composite coating system. Journal of coatings technology and research, 7(1), 91. -Li, T., Chen, Q., Schalder, L.S., Siegel, R.W., Mendel, J. and Ervin, G.C., 2004. The glass transition behavior of an acrylic nano composite, 109-112. -Lowden, L.A. and Hull, T.R., 2013. Flammability behaviour of wood and a review of the methods for its reduction. Fire science reviews, 2(1), 4. -Lowry, M.S., Hubble, D.R., Wressell, A.L., Vratsanos, M.S., Pepe, F.R. and Hegedus, C.R., 2008. Assessment of UV-permeability in nano-ZnO filled coatings via high throughput experimentation. Journal of Coatings Technology and Research, 5(2), 233-239. -Miszczyk, A. and Schauer, T., 2005. Electrochemical approach to evaluate the interlayer adhesion of organic coatings. Progress in Organic Coatings, 52(4), 298-305. -Moosavi, M., Moradian, S., Bastani, S. and Jalili, M., 2012. The use of experimental design for optimizing the photo stabilization of a substrate printed by a water-based overprint clear coat. Journal of Color Science and Technology. Hand, 2, 2. -Perera, D.Y., 1996. On adhesion and stress in organic coatings. Progress in organic coatings, 28(1), 21-23. -Silivane, A. and Ocheane, M., 2008. Wood protection coatings and reservetives,. http://www. Freedoniagroup .com /wood protecti on. -Sönmez, A., Budakçı, M. and Pelit, H., 2011. The effect of moisture content of the wood on layer performance of water borne varnishes. Bio Resources, 6(3), 3166-3177. -Standard test method for Pull-Off strength of coatings using portable adhesion testers, Annual Book of ASTM Standard, ASTM Standard, D4541, 2002. -Talaei, A., Rezvani, M. and Dust, M.H., 2018. Investigation of Adhesion Strength of Alkyd and Nitro Cellulose Transparent Coatings in Different Heat-treated Poplar Wood. Journal of Color Science and Technology, 171-180. | ||
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