کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5157175 | 1500589 | 2017 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Tetramethylguanidine-based gels and colloids of cellulose
ترجمه فارسی عنوان
ژل های تتراماتیل گوانیدین و کلوئید سلولز
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
چکیده انگلیسی
Novel and stable gels of cellulose were produced. These gels are prepared at room temperature by combination of cellulose and tetramethylguanidine (TMG) in different ratios (1:1, 1:2, 1:3 in equivalents of alcohol groups of cellulose per number of molecules of TMG). Detailed NMR, SEM, rheological and XRD studies of these gels were carried out. The concentration of cellulose in the gel, temperature, frequency of oscillation and shear rate were used as variables in order to understand the fundamentals and optimize operational conditions, considering their possible use as matrices for CO2 capture. Cellulose recovery from a specific gel was performed using ethanol as precipitating agent, leading to a lower crystallinity, which permits to consider this polymer in further studies associated to physical/chemical modification of cellulose.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Carbohydrate Polymers - Volume 169, 1 August 2017, Pages 58-64
Journal: Carbohydrate Polymers - Volume 169, 1 August 2017, Pages 58-64
نویسندگان
Gonçalo V.S.M. Carrera, Anabela Raymundo, Francisco M. Braz Fernandes, Noémi Jordão, Isabel Sousa, Manuel Nunes da Ponte, LuÃs C. Branco,