کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1383777 1500639 2015 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of rheological properties of dissolved cellulose/microfibrillated cellulose blend suspensions on film forming
ترجمه فارسی عنوان
اثر خواص رئولوژیکی تعلیق سلولز محلول سلولی / میکرو فیبریلیله شده بر تشکیل فیلم
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
چکیده انگلیسی


• Formation of a percolating MFC-network within dissolved cellulose solution.
• Stable dissolved cellulose/MFC blend suspensions without phase separation.
• Regenerated cellulose/MFC films by co-precipitation in acidic medium.
• Improved mechanical properties compared to neat regenerated cellulose film.

Enzymatically treated cellulose was dissolved in a NaOH/ZnO solvent system and mixed together with microfibrillated cellulose (MFC) in order to find the threshold in which MFC fibers form a percolation network within the dissolved cellulose solution and in order to improve the properties of regenerated cellulose films. In the aqueous state, correlations between the rheological properties of dissolved cellulose/MFC blend suspensions and MFC fiber concentrations were investigated and rationalized. In addition, rheological properties of diluted MFC suspensions were characterized and a correlation with NaOH concentration was found, thus partly explaining the flow properties of dissolved cellulose/MFC blend suspensions. Finally, based on results from Dynamic Mechanical Analysis (DMA), MFC addition had strengthening/plasticizing effect on regenerated cellulose films if low concentrations of MFC, below the percolation threshold (5.5–6 wt%, corresponding to 0.16–0.18 wt% of MFC in the blend suspensions), were used.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Carbohydrate Polymers - Volume 119, 30 March 2015, Pages 62–70
نویسندگان
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