کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1986082 1540237 2016 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Thermochemical properties of cellulose acetate blends with acetosolv and sawdust lignin: A comparative study
ترجمه فارسی عنوان
خواص ترمو شیمیایی استات سلولز با استئوزولوف و خاکستر لیگنین ترکیب: یک مطالعه مقایسه ای
کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی زیست شیمی
چکیده انگلیسی

Sawdust (SD) and cotton-lignin blends (CLB) were acetylated and the effect of lignin type and content on thermoplastic properties of the acetate produced was studied. The lignin in samples did not significantly affect the degree of acetylation. An increase in acetyl groups of 1–3% was observed in acetylated SD (ASD) unlike acetylated CLB (ACLB). Thermogravimetric analysis showed two thermal degradation zones; one at 190–200 °C and the other at 330–370 °C. The early degradation in ASD corresponds to galactoglucomannans while that in ACLB corresponds to the low-molecular-weight lignin. The second degradation is due to decomposition of cellulose acetate and high-molecular-weight lignin. DSC analysis showed homogeneous behaviour in ASD with only one glass transition temperature (Tg) at 170–180 °C, unlike ACLB that showed two Tgs at 170–180 °C. Sawdust acetylation, taking advantage of its residual lignin, showed higher reactivity and miscibility as compared to the same material produced by adding previously extracted lignin on cotton.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Biological Macromolecules - Volume 83, February 2016, Pages 403–409
نویسندگان
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