کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5156791 | 1500584 | 2017 | 27 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Production of cellulose nanofibers using phenolic enhanced surface oxidation
ترجمه فارسی عنوان
تولید نانو فیبرهای سلولز با استفاده از اکسیداسیون سطحی افزایش یافته فنل
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کلمات کلیدی
Sodium hypochlorite (PubChem CID: 23665760)Syringic acid (PubChem CID: 10742) - اسید سیرینژیک (PubChem CID: 10742)Surface oxidation - اکسیداسیون سطحPhenolics - فنولیکCellulose nanofibers - نانو فیبرهای سلولزSodium hydroxide (PubChem CID: 14798) - هیدروکسید سدیم (PubChem CID: 14798)Sodium carbonate (PubChem CID: 10340) - کربنات سدیم (PubChem CID: 10340)Carboxyl groups - گروه های کاربوکسیل
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
چکیده انگلیسی
In this study we demonstrate that lignin monomers formed as byproducts of pulping or bioprocessing of lignocellulosic biomass is an effective enhancer to oxidize cellulose surfaces with ozone for the production of cellulose nanofibers (CNF). Never dried softwood pulp with minimum mercerization was enzymatically treated leading to a homogeneous pulp slurry with a higher reactivity. The slurry was oxidized by ozone gas in the presence of syringic acid, a lignin degradation model compound, as an oxidation enhancer at room temperature and pH 11. Transmission electron microscopy (TEM) observations showed that stable CNF bundles with 3-10Â nm widths and lengths >100Â nm were obtained after ultrasonication of the oxidized product in water. Extensive characterization of the new CNF films revealed the nanofibers had carboxylate content similar to conventional carboxylated cellulose prepared by TEMPO-mediated oxidation. Based on NMR spectra, chemical conversion of the syringic acid during oxidation is proposed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Carbohydrate Polymers - Volume 174, 15 October 2017, Pages 120-127
Journal: Carbohydrate Polymers - Volume 174, 15 October 2017, Pages 120-127
نویسندگان
Iman Beheshti Tabar, Ximing Zhang, Jeffrey P. Youngblood, Nathan S. Mosier,