مواد مورد مصرف در آستری و پوشش‌های چوب و انواع روش‌های میکروسکوپی جهت ارزیابی آن‌ها

نوع مقاله : مقاله مروری

نویسندگان

1 دانشجوی دکتری بیولوژی و آناتومی، دانشکده منابع طبیعی، دانشگاه تهران

2 استادیار، گروه علوم و صنایع چوب و کاغذ، دانشکده منابع طبیعی، دانشگاه تهران

چکیده

پوشش‌‌های سطحی از سازه‌‌های چوبی در برابر هوازدگی و سایر عوامل پوسیدگی نظیر جذب رطوبت و تخریب میکروبی محافظت می‌‌کنند. میزان کارایی و بهره‌‌وری پوشش‌‌ها به عوامل زیادی از جمله اتصال مناسب‌‌ پوشش‌‌های اعمال‌‌شده به چوب بستگی دارد. چسبندگی پوشش به چوب مستلزم ایجاد پیوندهای شیمیایی و فیزیکی بین پوشش و بافت‌‌های چوبی می‌‌باشد. امروزه اهمیت روز افزون رعایت الزامات بهداشتی، ایمنی و زیست‌محیطی در تولید صنعتی، تولیدکنندگان را موظف به تهیه پوشش‌‌های سبز مانند پوشش‌‌های پایه آب، پوشش‌‌های پودری، پوشش‌‌های با غلظت‌‌ بالای ماده خشک و پوشش‌‌های مقاوم در برابر تابش نموده که دلیل آن کاهش انتشار ترکیبات آلی فرار (VOC) می‌‌باشد. در پوشش‌‌های نوین برای بهبود خواص پوشش نهایی چوب از فناوری نانو (نانوذرات دی اکسید سیلیکا، دی اکسید تیتانیم و سایر ترکیبات مانند اکسید روی و یون نقره) برای تولید پوشش‌‌های سطحی چوب استفاده می‌‌شود. استفاده از پوشش‌‌های نوین، نیازمند آشنایی با مواد و روش‌‌های کاربردی خاص نظیر سل‌‌-ژل، پلاسما و پوشش‌‌های پودری با پرتو زیر قرمز می‌‌باشد. پوشش‌‌های نوین چوب دارای ویژگی‌‌هایی می‌‌باشند که با مواد و روش‌‌های پوشش‌‌دهی رایج و قدیمی نمی‌‌توان به کیفیت‌‌ خوب و ایده‌‌آل دست یافت، بنابراین شناخت مواد و روش‌‌های پوشش‌‌دهی در دنیای امروزی بسیار حائز اهمیت می‌‌باشد. همچنین این بررسی بر پیشرفت‌‌های انجام‌‌شده به منظور درک جوانب فیزیکی سطح تماس با استفاده از بررسی سطح مشترک چوب و پوشش با استفاده از روش‌های تصویربرداری با وضوح بالا، از جمله میکروسکوپ هم‌‌کانونی (CLSM)، تصویربرداری میکروسکوپ الکترون روبشی و هماهنگی و ارتباط بررسی‌‌های میکروسکوپی نوری با استفاده از میکروسکوپ هم‌‌کانونی و میکروسکوپ الکترونی روبشی خواهد بود.
 

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Materials Used in Varnish and Wood Coatings and a Variety of Microscopic Techniques to Identify Them

نویسندگان [English]

  • Behnam Gholampoor 1
  • Hadi Gholamiyan 2
1 Department of Wood and Paper Science & Technology, Faculty of Natural Resources, University of Tehran
2 Department of Wood and Paper Science & Technology, Faculty of Natural Resources, University of Tehran
چکیده [English]

Surface coatings protect wooden structures against weathering and other caries such as moisture absorption and microbial degradation. The efficiency and productivity of coatings depend on many factors, including the proper bonding of the coatings to the wood. Wood adhesion requires chemical and physical bonds between wood coatings and textures. Today, the increasing importance of hygiene, safety and environmental requirements in industrial production requires manufacturers to produce green coatings such as water-based coatings, powder coatings, high-density coatings, and coatings. It is radiation resistant due to the reduction of VOC emissions. Nowadays, modern coatings utilize nanotechnology (silicon dioxide nanoparticles, titanium dioxide and other compounds such as zinc oxide, silver ion) to improve the surface finish of wood. New coatings require the use of special materials and methods such as selegel, plasma and infrared powder coatings. Modern wood coatings include features that cannot be achieved with good or ideal coatings with conventional and past coating materials, so identifying new coating materials and methods It is very important in today's world.This study focuses specifically on advances made in understanding the physical aspects of contact surface using common surface and coating survey using high-resolution imaging techniques, including concurrent microscopy (CLSM) imaging. The scanning electron microscope will be the coordination and relevance of optical microscopy studies using confocal microscopy and scanning electron microscopy.

کلیدواژه‌ها [English]

  • Contact surface
  • Scanning electron imaging
  • Concentrated microscope
  • Plate furniture
  • Powder coating
  • Nano materials

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  • تاریخ دریافت: 01 آبان 1398
  • تاریخ بازنگری: 15 بهمن 1398
  • تاریخ پذیرش: 19 بهمن 1398

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