کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7793374 | 1500656 | 2014 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Reversible controlled assembly of chitosan and dextran sulfate: A new method for nanoparticle elaboration
ترجمه فارسی عنوان
مونتاژ کنترل کننده معکوس کیتوزان و سولفات دکتران: یک روش جدید برای تعیین نانو ذرات
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
چکیده انگلیسی
Colloidal polyelectrolyte complexes (PECs) were obtained by the controlled assembly of oppositely charged dextran sulfate and chitosan, at room temperature, in water and under moderate stirring. The control over the assembly process was achieved by the slow dialysis of the sodium chloride added to the polyelectrolyte solutions prior to mixing them. This method was carried out at high polymer concentrations of 1.5 wt% and 3 wt%, with screening salt concentrations (SSC) from 2 mol Lâ1 and chitosans of degree of acetylation (DA) from 39% and above. The resulting particles featured a size distribution between 350 and 580 nm, a positive surface charge (30-58 mV) and remained stable for 40 days at 37 °C. The reversibility of the controlled assembly was established by adding 2 mol Lâ1 NaCl to the dispersion, the particle solubilized and then re-formed upon dialysis of the salt.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Carbohydrate Polymers - Volume 102, 15 February 2014, Pages 717-726
Journal: Carbohydrate Polymers - Volume 102, 15 February 2014, Pages 717-726
نویسندگان
M. Costalat, L. David, T. Delair,