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بررسی اثر مقدار الیاف چوب انگور و زمان پرس بر زاویه تماس و مقاومت اتصال سطح تخته فیبر دانسیته متوسط | ||
| تحقیقات علوم چوب و کاغذ ایران | ||
| مقاله 10، دوره 30، شماره 2 - شماره پیاپی 51، تیر 1394، صفحه 289-298 اصل مقاله (392.73 K) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22092/ijwpr.2015.12919 | ||
| نویسندگان | ||
| فاطمه رضائی1؛ علی اکبر عنایتی* 2 | ||
| 1دانش آموخته‌ی کارشناسی ارشد، دانشکده منابع طبیعی، دانشگاه تهران، ایران، | ||
| 2استادT صنایع چوب و کاغذT دانشکده منابع طبیعی، دانشگاه تهران، ایران، | ||
| چکیده | ||
| در این تحقیق تاثیر استفاده از الیاف چوب انگور بصورت مخلوط با الیاف چوب‌های جنگلی در ساخت تخته‌فیبر دانسیته متوسط مورد بررسی قرار گرفت. تخته‌های آزمونی همسان با ضخامت 15 میلی‌متر و دانسیته 65/0 گرم بر سانتی‌مترمکعب ساخته شدند. عوامل متغیر شامل درصد اختلاط الیاف چوب انگور در سه سطح 0/100، 30/70 و 60/40 و زمان پرس 4، 5 و6 دقیقه بودند. دو ویژگی زاویه تماس (ترشوندگی) و مقاومت اتصال سطحی تخته‌ها بررسی شدند. نتایج نشان داد که با افزایش مقدار الیاف چوب انگور تا 60 درصد زاویه تماس کاهش اما این کاهش معنی‌دار نبوده است. با افزایش زمان پرس از 4 به 5 دقیقه زاویه تماس افزایش و ترشوندگی کاهش داشته است اما با افزایش زمان پرس از 5 به 6 دقیقه زاویه تماس کاهش و ترشوندگی افزایش یافت. مقاومت اتصال سطحی تخته‌ها با افزایش میزان الیاف چوب انگور تا 30 درصد کاهش و با افزایش از 30 به 60 درصد تخته‌ها قوی‌تر می‌شوند. | ||
| کلیدواژه‌ها | ||
| تخته‌فیبر دانسیته متوسط؛ الیاف چوب انگور؛ مقاومت اتصال سطحی؛ ترشوندگی؛ زاویه تماس | ||
| عنوان مقاله [English] | ||
| Investigation of gluability and wettability properties of Medium Density Fiberboard produced using vine pruning fibers in combination with wood fibers | ||
| نویسندگان [English] | ||
| Fatemh Rezaei1؛ Ali akbar Enayati2 | ||
| 1M.Sc. Graduate, Faculty of Natural Resources, University of Tehran, Karaj, I. R. Iran | ||
| 2Professor, Faculty of Natural Resources, University of Tehran, Karaj, I. R. Iran | ||
| چکیده [English] | ||
| In this research, the effect of vine pruning fibers in combination with wood fibers on contact angel (wettability) and surface bond strength of medium density fiberboard was studied. One layer laboratory panels with a thickness of 15 mm and density of 650 Kg/Cm3 were produced. Variable factors were vine pruning fibers content in three levels of 0/100, 30/70 and 60/40 by weight and press time in three levels of 4, 5 and 6 minutes. The wet ability and surface bond strength of panels were measured. Results showed that the contact angle of the boards was reduced when the vine pruning fibers content increased up to 60%. Press time had significant influence on wet ability of test panels. So that the contact angle was increased with increasing the press time up to 5 minutes. Whereas the contact angle was reduced when the press time of panels increased to 6 minutes. In addition, the results indicated that the sanding of panels caused a decrease of contact angle in the boards. Moreover the surface bond strength of panels were reduced with adding vine pruning fibers up to 30% whereas the panels produced using 60% vine pruning fibers showed stronger. | ||
| کلیدواژه‌ها [English] | ||
| MEDIUM DENSITY FIBERBOARD, Vine pruning fibers, Surface bond strength, wettability, Contact angle | ||
| مراجع | ||
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- Adamson, A., 1982. Physical Chemistry of surface. 4th ed. John Wiley & Sons. New York, pp 664. - ASTM D 5946, 2009. Standard Test Method for Corona-Treated Polymer Films Using Water Contact Angle Measurements. - ASTM D 5651-95a, 2008. Standard Test Method for Surface Bond Strength of Wood-Base Fiber and Particle Panel Materials. - Aydin, I., and Colakoglu, G., 2002. The effects of veneer drying temperature on wettability, surface roughness and some properties of plywood. In: Proceedings of the Sixth Panel Products Symposium, 9-11 October, 2002. Landudno, Wales, UK, pp. 60-70. - Aydin, I., 2004. Activation of wood surfaces for glue bonds by mechanical pre treatment and its effects on some properties of veneer surfaces and plywood panels. Appl. Surf. Sci. 233: 268-274. - Aydin, I., Colakoglu, G., and Hiziroglu, S., 2006. Surface characteristics of spruce veneers and shear strength of plywood as a function of log temperature in peeling process. Int. J. Solids Struct. 43: 6140-6147. - Ayrilmis, N., Dundar, T., Candan, Z., and Akbulut, T., 2009. Wettability of fire retardant treated laminated veneer lumber (LVL) manufactured from veneers dried at different temperatures. BioResources 4(4): 1536-1544. - Ayrilmis, N., Candan, Z., Akbulut, T., and Balkiz, O.D., 2010. Effect of sanding on surface properties of medium density fiberboard. Drvna Industrija 61 (3): 175-181. - Baharoglu, M., Nemli, G., Sari, B., Bardak, S., and Ayrilmis, N., 2011. The influence of moisture content of raw material on the physical and mechanical properties, surface roughness, wettability and formaldehyde emission of particleboard composite. Composites. - Candan, Z., Buyuksari, U., Korkut, S., Unsal, O., and Cakicier, N., 2012. Wettability and surface roughness of thermally modified plywood panels. Industrial crops and products36: 434-436. - Doosthoseini, K., 2007. Wood Composite Materials Manufacturing, Applications. University of Tehran Press, Tehran. - Dundar, T., Ayrilmis, N., and Candan, Z., 2008. Evaluation of surface roughness of laminated veneer lumber (LVL) made from beech veneers treated with various fire retardants and dried at different temperatures. Forest Prod. J. 58(1/2): 71-76. - European Standard EN 326-1, 1993. Wood-based Panels. Sampling, cutting and inspection. Sampling and cutting of test pieces and expression of test results. 1993. - Franklin G.L., 1938. The preparation of woody tissues for microscopic examination. For. Prod.Res.Lab. -http://www.maj.ir/portal/Home/Default.aspx?CategoryID=20ad5e49-c727-4bc9-9254-de648a5f4d52 (02/12/2013) - Kalnis, M., and Feist, W., 1993. Increase in wettability of wood with weathering. Forest Prod J 43(2): 55-57. - Khan, S., Chui, Y.H., Schneider, M.H., and Barry, A.O., 2004. Wettability of treated flakes of selected species eith commercial adhesive resins. J. Inst. Wood Sci. 16 (5):258-265. - Ozdimer, T., Hiziroglu, S., and Malkocoglu, A., 2009. Influence of relative on surface quality and adhesion strength of coated medium density fiberboard (MDF) panels. Mater. Des. 30: 2543-2546. - Rolleri, A., and Roffael, E., 2008. Influence of climatic conditions and surface roughness on the wettability of medium density fiberboards (MDF). Holz Roh Werkst. 66: 465-466. - Unsal, O., Candan, Z., Buyuksari, U., Korkut, S., and Babiak, M., 2010. Effects of thermal modification on surface characteristics of OSB panels. Wood Res. 55(4): 51-57. - Unsal, O., Candan, Z., and Korkut, S., 2011. Wettability and roughness characteristics of modified wood boards using a hot-press. Ind. Crop. Prod. 34: 1455-1457. - Wellons, J., 1977. Adhesion to wood substrates. In: Wood Technology: Chemical Aspect. Goldstein IS (ed) pp. 150-168, Washington DS: Am Chem Soc Cited from: Tsoumis G (1991): Science and Technology of Wood. Structure, Properties, Utilization. Van Nostrand Reinhold, New York. Pp 494. - Yousefi, H., Enayati, A.A., Faezipour, M., and Sadatnejad, H., 2008. The effect of steaming time and resin content on MDF made from canola straw. Iran. J. Wood and Paper Sci. 23: 149-156. | ||
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