بررسی اثر نانورس بر بهبود ویژگی‌‌های کاغذ حاصل از خمیر سودای باگاس در برابر آتش

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی دکتری صنایع خمیر و کاغذ ، گروه علوم و مهندسی کاغذ، دانشکده مهندسی چوب و کاغذ، دانشگاه علوم کشاورزی و منابع طبیعی گرگان، ایران

2 استاد گروه علوم ومهندسی کاغذ‌‌، دانشکده مهندسی چوب و کاغذ ، دانشگاه علوم کشاورزی و منابع طبیعی‌گرگان، گرگان، ایران

3 دانشیار، گروه علوم و مهندسی کاغذ، دانشکده مهندسی چوب و کاغذ، دانشگاه علوم کشاورزی و منابع طبیعی گرگان، ایران

4 دانشیار، گروه علوم و مهندسی کاغذ، دانشکده مهندسی چوب و کاغذ، دانشگاه علوم کشاورزی و منابع طبیعی ساری، ایران

چکیده

مواد بازدارنده آتش نقش مهمی در افزایش پایداری حرارتی و کاهش خطرات مرتبط با اشتعال مواد دارند. یکی از روش‌­های مؤثر برای افزایش خواص بازدارندگی آتش، استفاده از نانومواد مانند نانورس‌ها است. نانورس مونت موریلونیت (MMT) به دلیل ساختار لایه‌ای و خواص منحصر به فردش، به‌عنوان یکی از مهم‌ترین نانومواد در این حوزه شناخته می‌شود. علاوه بر این، نشاسته کاتیونی به‌عنوان یک ماده طبیعی با خواص چسبندگی و هم­‌افزایی بالا، می‌تواند بهبود خواص مکانیکی و حرارتی مواد را تضمین کند. در­این تحقیق، با استفاده از خمیرکاغذ حاصل از سودای باگاس، مقوای دست‌ساز با وزن پایه 120 گرم بر مترمربع و ضخامت 185/0 میلی‌متر تهیه شد. نانورس به‌عنوان ماده بازدارنده آتش با غلظت­‌های مختلف (10%، 20%، 30%) استفاده شد. برای بهبود مقاومت خشک کاغذ و تشکیل زغال، نشاسته کاتیونی به میزان ثابت 10% به‌تمامی تیمارها اضافه شد. عملیات پوشش‌دهی در دانشگاه علوم کشاورزی و منابع طبیعی گرگان با دستگاه Auto Bar Coater انجام گرفت. ویژگی‌های فیزیکی و مقاومتی کاغذ از جمله مقاومت به نفوذ مایعات، ضخامت کاغذ، زاویه تماس، مقاومت به کشش، مقاومت به ترکیدن و مقاومت به پاره شدن بررسی شد. همچنین ویژگی­‌های کندسوزی و پایداری حرارتی با استفاده از دستگاه TGA و آزمون­‌های اشتعال‌­پذیری عمودی و FTIR بررسی گردید. نتایج نشان داد که پوشش‌دهی با نانورس مونت موریلونیت و نشاسته کاتیونی می‌تواند به­طور قابل‌توجهی مقاومت به کشش، مقاومت به پاره شدن و مقاومت به ترکیدن کاغذ را افزایش دهد. بهترین عملکرد در غلظت 20% مشاهده شد. مکانیزم‌­های مختلفی از جمله تشکیل پیوند­های هیدروژنی و افزایش سطح ویژه به این بهبود کمک کردند. علاوه بر این، پوشش­‌دهی موجب بهبود ویژگی‌­های کند­سوزی و پایداری حرارتی کاغذ شد. این­نتایج نشان می­‌دهد که استفاده از نانورس و نشاسته کاتیونی می‌­تواند به­طور مؤثری ویژگی­‌های مقاومتی و حرارتی کاغذ را بهبود ببخشد.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Investigation on the Effect of Nano-clay on Improving Fire Retardancy Properties of Paper Made from Bgasse Soda Pulp

نویسندگان [English]

  • soleiman zaheri 1
  • ALI Ghasemian 2
  • Mohamad Reza Dehghani firuzabadi 3
  • Ghasem Asadpur 4
1 Ph.D. Student, Dept. of Paper Sciences and Engineering, Faculty of Wood and Paper Engineering, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran
2 Professor, Dept. of Paper Sciences and Engineering, Faculty of Wood and Paper Engineering, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran
3 Associate Prof., Dept. of Paper Sciences and Engineering, Faculty of Wood and Paper Engineering, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran
4 Associate Prof., Dept. of , Paper Sciences and Engineering, Faculty of Wood and Paper Engineering, Sari University of Agricultural Sciences and Natural Resources,Sari, Iran
چکیده [English]

Fire retardant materials play an important role in increasing thermal stability and reducing risks associated with material ignition. One of the effective methods to increase fire retardancy properties is the use of nanomaterials such as nanoclays. Montmorillonite nanoclay (MMT) is known as one of the most important nanomaterials in this field due to its layered structure and unique properties. In addition, cationic starch, as a natural material with high adhesion and synergistic properties, can guarantee the improvement of mechanical and thermal properties of materials. In this research, using soda bagasse paper pulp, handmade cardboard with a basis weight of 125 g/m2 and the thickness of 0.185 mm was prepared. Nanoclay was used as a fire retardant with different concentrations (10%, 20%, 30%). To improve paper dry resistance and char formation, cationic starch was added to all treatments at a constant rate of 10%. The coating operation was carried out at Gorgan University of Agricultural Sciences and Natural Resources with Auto Bar Coater. The physical and resistance characteristics of paper, including liquid penetration resistance, paper thickness, contact angle, tensile strength, burst resistance, and tear resistance were investigated. Also, the properties of slow burning and thermal stability were investigated using TGA device and vertical flammability tests and FTIR. The results showed that coating with montmorillonite nanoclay and cationic starch can significantly increase the tensile strength, tearing resistance and bursting resistance of the paper. The best performance was observed at 20% concentration. Various mechanisms including the formation of hydrogen bonds and the increase of specific surface area contributed to this improvement. In addition, the coating improved the flame retardancy properties and thermal stability of the paper. These results show that the use of nanoclay and cationic starch can effectively improve the resistance and thermal properties of paper.
 
 

کلیدواژه‌ها [English]

  • Coating
  • Flame Retardancy
  • Bagasse Virgin Soda Pulp
  • Montmorillonite Nanoclay
  • Packaging Paper

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علوم و فنون بسته‌بندی
دوره 15، شماره 59 - شماره پیاپی 59
شماره پیا پی 59 پاییز 1403
آذر 1403
صفحه 21-31

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سابقه مقاله

  • تاریخ دریافت: 22 مرداد 1403
  • تاریخ بازنگری: 03 شهریور 1403
  • تاریخ پذیرش: 22 مهر 1403
  • تاریخ انتشار: 20 آذر 1403

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