کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1430105 987195 2010 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Biomimetic mineralization of calcium phosphate crystals in polyacrylamide hydrogel: Effect of concentrations of calcium and phosphate ions on crystalline phases and morphology
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد بیومتریال
پیش نمایش صفحه اول مقاله
Biomimetic mineralization of calcium phosphate crystals in polyacrylamide hydrogel: Effect of concentrations of calcium and phosphate ions on crystalline phases and morphology
چکیده انگلیسی

Calcium phosphate crystals were synthesized in polyacrylamide (PAAm) hydrogel, and the effects of the concentrations of calcium and phosphate ions on the crystalline phases and morphology were investigated. PAAm hydrogels containing diammonium hydrogen phosphate ((NH4)2HPO4) were transformed into calcified materials by diffusion of calcium ions from calcium nitrate (Ca(NO3)2) aqueous solution into the gels. Several kinds of calcium phosphate crystals were precipitated at various Ca(NO3)2 concentrations (0.5–4.0 mol·dm− 3), or (NH4)2HPO4 contents (3.6–21.6 mmol) in the gels. The crystalline phases were mainly determined by the (NH4)2HPO4 content in the gels. When the (NH4)2HPO4 content was ≥ 10.8 mmol, hydroxyapatite (HAp) formed near the interfaces between Ca(NO3)2 solution and the gels, whereas octacalcium phosphate (OCP) formed in gels with ≤ 10.8 mmol (NH4)2HPO4. HAp crystals were granular in form and about 200 nm in diameter, and OCP crystals were spherulitic with diameter 10–70 μm.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: C - Volume 30, Issue 1, 1 January 2010, Pages 154–159
نویسندگان
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