کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1402610 984772 2010 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Superabsorbent hydrogels based on cellulose for smart swelling and controllable delivery
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
پیش نمایش صفحه اول مقاله
Superabsorbent hydrogels based on cellulose for smart swelling and controllable delivery
چکیده انگلیسی

Novel superabsorbent hydrogels were prepared successfully from carboxymethylcellulose sodium (CMC) and cellulose in the NaOH/urea aqueous system by using epichlorohydrin (ECH) as cross-linker. The structure and morphology of the hydrogels were characterized by FT-IR spectroscope, thermogravimetric analysis and scanning electron microscope. The results revealed that the CMC contributed to the enhanced size of pore, whereas cellulose as a strong backbone in the hydrogel to support it for keeping its appearance. Their equilibrium swelling ratio in distilled water and different physiological fluids were evaluated, indicating the maximum swelling ratio in water reached an exciting level of 1000 as the hydrogels still keeping a steady appearance. Moreover, the hydrogels exhibited smart swelling and shrinking in NaCl or CaCl2 aqueous solution, as well as the release behavior of bovine serum albumin (BSA) that could be controlled by changing CMC content. The cellulose-based hydrogels are promising for the applications in the biomaterials area.

Cellulose-based hydrogels (a) showed superabsorbent ability (b) when it was immersed distilled water. Moreover, the swollen hydrogels exhibited obviously shrinking in 0.1 M NaCl solution (c).Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: European Polymer Journal - Volume 46, Issue 1, January 2010, Pages 92–100
نویسندگان
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