کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7782843 | 1500567 | 2018 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Study of steam explosion pretreatment and preservation methods of commercial cellulose
ترجمه فارسی عنوان
مطالعه پیشگیری از انفجار بخار و روش های نگهداری سلولز تجاری
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کلمات کلیدی
فیبر طبیعی، کریستالی هیدرولیز آنزیمی، درجه پلیمریزاسیون، خشک کردن استون، انجماد
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
چکیده انگلیسی
Steam explosion (150-200â¯Â°C, 5-30â¯min) was performed on a commercial cellulose presented in two configurations (fiberized and compact sheet) and its effect on their chemical and physical properties was studied, along with the influence of two different preservation methods (acetone drying and freezing) after pretreatment. No degradation compounds were produced during pretreatment, although solid recovery (RS) decreased with temperature from 90% to 62%. Similar particle size and surface conditions (increased porosity) were found for both types of pretreated samples despite the extremely different initial configuration. Crystallinity diminished for 150â¯Â°C samples, but 200â¯Â°C pretreatment promoted recrystallization. Pretreatment also reduced polymerization degree, although enzymatic accessibility did not improve. Both acetone and freezing processes extremely affected cellulose properties. Acetone drying counterbalanced crystallinity and enzymatic accessibility variations of pretreated samples, while decreasing polymerization degree. Freezing dramatically decreased enzymatic accessibility of pretreated samples down to 15.8%.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Carbohydrate Polymers - Volume 191, 1 July 2018, Pages 234-241
Journal: Carbohydrate Polymers - Volume 191, 1 July 2018, Pages 234-241
نویسندگان
Ana Lorenzo-Hernando, Judit MartÃn-Juárez, Silvia Bolado-RodrÃguez,