کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7789629 1500641 2015 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Tunicate cellulose nanocrystals: Preparation, neat films and nanocomposite films with glucomannans
ترجمه فارسی عنوان
نانوبلورهای سلولز تونیک: آماده سازی، فیلمهای شسته و نانوکامپوزیت با گلوکومننها
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
چکیده انگلیسی
Cellulose nanocrystals (CNs) were prepared from tunicate by enzymatic hydrolysis (ECN), TEMPO-mediated oxidation (TCN) and acid hydrolysis (ACN). They were cast alone or blended with glucomannan (GM) from konjac or spruce to prepare films. Different CNs were obtained with a yield of ECN > TCN > ACN with corresponding order of decreased Mw but increased crystallinity. The CNs' diameters were on the nanometre scale, with lengths of ECN > TCN > ACN. For CN-films, TCN and ACN fibrils were stretched and parallel to each other due to surface charges. For CN-GM films, both components interacted strongly with each other, resulting in changes of crystallinity, specific surface area, fibril diameter and contact angle compared with CN films. The composite films had good thermal, optical and mechanical properties; the last ones are apparently better than similar films reported in the literature. This is the first systematic study of different tunicate CN-GM nanocomposite films and the first ever for spruce GM.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Carbohydrate Polymers - Volume 117, 6 March 2015, Pages 286-296
نویسندگان
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