کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7783099 | 1500569 | 2018 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
A novel enzymatic approach to nanocrystalline cellulose preparation
ترجمه فارسی عنوان
روش جدید آنزیمی برای آماده سازی سلولز نانوکریستالیک
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کلمات کلیدی
سلولز نانوکریستال، سلولاز، بهینه سازی، افزایش تولید، طول فیبر،
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
چکیده انگلیسی
In this work, conditions for an enzymatic pretreatment prior to NCC isolation from cotton linter were assessed. Different cellulase doses and reaction times were studied within an experimental design and NCC were obtained. At optimal enzymatic conditions (20U, 2â¯h), a total yield greater than 80% was achieved and the necessary enzymatic treatment time was reduced 90%. Different intensities of enzymatic treatments led to proportional decreases in fiber length and viscosity and also were inversely proportional to the amount of released oligosaccharides. These differences within fibers lead to quantitative differences in NCC: increase in acid hydrolysis yield, reduction of NCC surface charge and crystallinity increase. Benefits produced by enzymatic treatments did not have influence over other NCC characteristics such as their sulfur content (â1%), size (â200â¯nm), zeta potential (ââ50â¯mV) or degree of polymerization (â200). Evidence presented in this work would reduce the use of harsh sulfuric acid generating a cleaner stream of profitable oligosaccharides.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Carbohydrate Polymers - Volume 189, 1 June 2018, Pages 39-47
Journal: Carbohydrate Polymers - Volume 189, 1 June 2018, Pages 39-47
نویسندگان
Facundo Beltramino, M. Blanca Roncero, Teresa Vidal, Cristina Valls,