کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7782692 | 1500567 | 2018 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Mechanically improved polyvinyl alcohol-composite films using modified cellulose nanowhiskers as nano-reinforcement
ترجمه فارسی عنوان
فیلم های کامپوزیتی پلی وینیل الکل با استفاده از نانوسیم های سلولز اصلاح شده به صورت مکانیکی به عنوان تقویت نانو
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
چکیده انگلیسی
Cellulose nanowhiskers (CWs) extracted from cotton fibers were successfully modified with distinct anhydrides structures and used as additives in poly(vinyl alcohol) (PVA) nanocomposite films. The surface modification of CWs was performed with maleic, succinic, acetic or phthalic anhydride to compare the interaction and action the carboxylic groups into PVA films and how these groups influence in mechanical properties of the nanocomposites. CWs presented a high degree of crystallinity and good dispersion in water, with average length at the nanoscale. The addition of specific amounts (3, 6 and 9â¯wt.%) of modified-CWs increased up to 4.4 times the storage modulus (PVA88-CWSA 9â¯wt.%), as observed from dynamic mechanical analysis (DMA), compared to the bare PVA films. A significant increase in mechanical properties such as tensile strength, elastic modulus, and elongation at break showed a close relationship to the amount and chemical surface characteristics of CWs added, suggesting that these modified-CWs could be explored as reinforcement additives in PVA films.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Carbohydrate Polymers - Volume 191, 1 July 2018, Pages 25-34
Journal: Carbohydrate Polymers - Volume 191, 1 July 2018, Pages 25-34
نویسندگان
Cristiane Spagnol, Elizângela. H. Fragal, Maria A. Witt, Heveline D.M. Follmann, Rafael Silva, Adley F. Rubira,