نوع مقاله : مقاله پژوهشی

نویسندگان

1 استادیار گروه تکنولوژی و مهندسی چوب، دانشگاه علوم کشاورزی و منابع طبیعی گرگان، ایران

2 دانشیار گروه تکنولوژی و مهندسی چوب، دانشگاه علوم کشاورزی و منابع طبیعی گرگان، ایران

چکیده

در این بررسی اثر نانو اکسید روی به‌عنوان جاذب نور فرابنفش بر مقاومت به هوازدگی چندسازه چوب-پلی‌پروپیلن مطالعه شد. برای­ این منظور، چندسازه­های چوب-پلی­پروپیلن با افزودن 0، 1، 2 و 3 درصد نانو اکسید روی به کمک مخلوط­کن داخلی و پرس آزمایشگاهی ساخته شدند. سپس آزمون هوازدگی شدت گرفته به مدت 1480 ساعت (در توالی­های 0، 480، 960 و 1480 ساعت) روی آنها انجام شد. برای مطالعه شدت هوازدگی، از آزمون­های مقاومت کششی، سختی، رنگ­سنجی، تصاویر استریومیکروسکوپ و طیف­سنجی FTIR استفاده شد. نتایج نشان داد که هوازدگی موجب تخریب فیزیکی و شیمیایی سطح نمونه­ها، تغییر رنگ و کاهش مقاومت­های کششی و سختی شده است. وجود نانو اکسید روی در ساختار چندسازه توانست تا حدودی از افت مقاومت کششی و سختی نمونه­ها و همچنین تخریب سطح آنها جلوگیری کند. درمجموع می‌توان گفت که استفاده از 2 درصد نانو اکسید روی عملکرد بهتری را در برابر هوازدگی نسبت به سایر مقادیر مورد استفاده در این تحقیق داشته است.

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