کد مقاله کد نشریه سال انتشار مقاله انگلیسی ترجمه فارسی نسخه تمام متن
811292 1469142 2011 9 صفحه PDF سفارش دهید دانلود رایگان
عنوان انگلیسی مقاله ISI
The influence of the compounding process and testing conditions on the compressive mechanical properties of poly(D,L-lactide-co-glycolide)/αα-tricalcium phosphate nanocomposites
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موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی پزشکی
پیش نمایش صفحه اول مقاله
The influence of the compounding process and testing conditions on the compressive mechanical properties of poly(D,L-lactide-co-glycolide)/αα-tricalcium phosphate nanocomposites
چکیده انگلیسی

The enhanced biological and degradation properties of bioresorbable polymer matrix nanocomposites intended for use in orthopaedic applications have been demonstrated recently. However, at the moment there are only limited reports addressing their mechanical properties under physiological conditions, which is of central importance to the successful design of these nanocomposites. Here, we show that at room temperature in dry conditions, the incorporation of αα-tricalcium phosphate nanoparticles into a matrix of poly(D,L-lactide-co-glycolide) increases the compressive strength and modulus. The values at room temperature obtained for nanocomposites compounded by a modified solvent evaporation method via attrition milling in acetone were similar to those from samples compounded by twin screw extrusion. The values for nanocomposites tested at 37 °C in phosphate buffered saline solution were significantly lower than those tested at room temperature in dry conditions, and lower still after two weeks of degradation in PBS at 37 °C. These effects can be related to hydration, degradation and interface effects in the nanocomposites.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the Mechanical Behavior of Biomedical Materials - Volume 4, Issue 7, October 2011, Pages 1081–1089
نویسندگان
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