مقایسة فیلم نانوالیاف سلولز تولیدی به روش هواخشک و خلأخشک حاصل از خمیرکاغذ کرافت رنگ‌بری‌نشدة پوست کنف

نوع مقاله : مقاله پژوهشی

نویسندگان

1 استادیار گروه صنایع خمیر و کاغذ، دانشکدة جنگل‌داری و محیط زیست، دانشگاه صنعتی خاتم الانبیاء بهبهان، بهبهان، ایران

2 دانشیار گروه صنایع خمیر و کاغذ، دانشکدة صنایع چوب و کاغذ، دانشگاه علوم کشاورزی و منابع طبیعی گرگان، گرگان، ایران

چکیده

الیاف سلولز نانوفیبریله‌شده از خمیرکاغذ کرافت رنگ‌بری‌نشدة پوست کنف تهیه و پس از ساخت فیلم‌های نانوالیاف سلولز هواخشک و خلأخشک ویژگی‌های کششی آن‌ها بررسی شد. قابلیت خمیرکاغذ رنگ‌بری‌نشدة پوست کنف برای تولید نانوالیاف سلولز با استفاده از میکروسیال‌کننده مناسب است؛ به طوری که استفاده از تعلیق خمیرکاغذ با خشکی 5/5 درصد نیز قابلیت تولید نانوالیاف سلولز را دارد. تصویر میکروسکوپ الکترونی عبوری نشان‌دهندة تولید نانوالیاف سلولز با ابعاد کمتر از 100 نانومتر بود. اگرچه دانسیتة فیلم خلأخشک بیشتر از هواخشک بود (1105 در مقایسه با 1007 کیلوگرم بر متر مکعب)، شاخص مقاومت به کشش فیلم هواخشک بیشتر از خلأخشک به دست آمد (148 در مقایسه با 140 نیوتن‌متر بر گرم). همچنین مقاومت کششی، شاخص انرژی جذب کششی، و درصد کرنش فیلم هواخشک نیز بیشتر از فیلم خلأخشک بود. مدول کشسانی فیلم نانوالیاف سلولز خلأخشک بیشتر از هواخشک بود که انتظار می‌رود مرتبط با بیشتربودن دانسیتة آن باشد.

کلیدواژه‌ها

عنوان مقاله [English]

Comparison of Produced Film of Cellulose Nanofibers by Dried and Vacuum Filtrated Method from Unbleached Kraft Pulp of Kenaf Bast Fiber

نویسندگان [English]

  • Pejman Rezayati Charani 1
  • Mohammadreza Dehghani Firouzabadi 2
1 Assistant Professor, Pulp and Paper science and technology Group, Faculty of Forestry and Environmental, Behbahan Khatam Alanbia University of Technology, Behbehan, I.R. Iran
2 Associate Professor, Department of Pulp & Paper Technology, Faculty of Wood and Paper Engineering, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, I.R. Iran
چکیده [English]

 
Nanofibrillated cellulose fibers were produced from unbleached kraft pulp of kenaf bast fiber. Air dried and vacuum filtrated films of cellulose nanofibers were produced and their density and tensile properties were investigated. Kenaf bast fiber unbleached kraft pulp has good potential for production of cellulose nanofibers by microfluidizer; so that the use of kenaf bast fiber unbleached kraft pulp suspension with consistency about 5.6% has the potential for cellulose nanofibers production. Transmission electron microscopy image showed the production of cellulose nanofibers with dimensions less than 100 nanometers. Although the apparent density of vacuum filtrated film was more than that of the air dried film (1105 compared to 1007 kg/m3), tensile strength index of the air dried film was more than that of the vacuum filtrated film (148 compared to 140 Nm/g). Tensile strength, tensile energy abortion index and strain at breaking percentage of the air dried film were more than those of the vacuum filtrated film too. However, the elastic modulus of vacuum filtrated film of cellulose nanofibers was more than that of the air dried film that it can be related to the apparent density different of these films.

کلیدواژه‌ها [English]

  • kenaf bast fiber
  • unbleached kraft pulp
  • film of cellulose nanofibers
  • microfluidizer
  • Strength properties

مراجع

 
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