قابلیت نفوذ نانو ولاستونیت در چوب صنوبر و اثر آن بر مقاومت زیستی و ثبات ابعاد چوب

نوع مقاله: مقاله پژوهشی

نویسندگان

1 استادیار گروه علوم و صنایع چوب و کاغذ، دانشکده منابع طبیعی، دانشگاه تهران، کرج، ایران

2 کارشناس ارشد گروه علوم و صنایع چوب و کاغذ، دانشکده منابع طبیعی، دانشگاه تهران، کرج، ایران

3 استاد گروه علوم و صنایع چوب و کاغذ، دانشکده منابع طبیعی، دانشگاه تهران، کرج، ایران

چکیده

در سال‌های اخیر توجه زیادی به استفاده از نانو فناوری برای بهبود معایب چوب شده است. ولاستونیت به عنوان یک سنگ معدنی معمولاً در تولید پلاستیک، سرامیک و بتن استفاده می شود. تولید نانو ولاستونیت گرایش به استفاده از آن را افزایش داده است. اخیراً تحقیقات زیادی برای بهبود دوام، ثبات ابعاد و احتراق پذیری چوب با استفاده از نانو ولاستونیت در کشور انجام شده است. نتایج جالب توجه به دست آمده باعث شد تا در این تحقیق به طور تکمیلی قابلیت نفوذ نانو ولاستونیت به داخل بافت چوب و اثرگذاری آن در برابر تخریب قارچی و ثبات ابعاد چوب صنوبر بررسی شود. نتایج نشان داد نانو ولاستونیت قابلیت نفوذ به داخل چوب را نداشته و بافت چوب به صوت فیلتر در مقابل آن عمل می‌کند. اگرچه دوام زیستی نمونه‌های تیمار شده با نانو ولاستونیت در برابر قارچ پوسیدگی سفید افزایش یافت اما این تاثیر ماندگار نبوده و پس از آبشویی کوتاه مدت از دست رفت. همچنین تیمار چوب با نانو ولاستونیت اثری بر روی مقادیر جذب آب و واکشیدگی ابعاد چوب نداشت. در مجموع، بر پایه نتایج این تحقیق، نانو ولاستونیت برای صنعت اشباع چوب –در جایی که چوب خام مورد استفاده است- توصیه نمی‌شود.

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