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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 | ||
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