کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5204590 1381965 2006 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Biodegradable poly(lactic acid)/chitosan-modified montmorillonite nanocomposites: Preparation and characterization
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
پیش نمایش صفحه اول مقاله
Biodegradable poly(lactic acid)/chitosan-modified montmorillonite nanocomposites: Preparation and characterization
چکیده انگلیسی
In this study, the biodegradable poly(lactic acid) (PLA)/montmorillonite (MMT) nanocomposites were successfully prepared by the solution mixing process of PLA polymer with organically-modified montmorillonite (m-MMT), which was first treated by n-hexadecyl trimethyl-ammonium bromide (CTAB) cations and then modified by biocompatible/biodegradable chitosan to improve the chemical similarity between the PLA and m-MMT. Both X-ray diffraction data and transmission electron microscopy images of PLA/m-MMT nanocomposites indicate that most of the swellable silicate layers were disorderedly intercalated into the PLA matrix. Mechanical properties and thermal stability of the PLA/m-MMT nanocomposites performed by dynamic mechanical analysis and thermogravimetric analysis have significant improvements in the storage modulus and 50% loss in temperature when compared to that of neat PLA matrix. The degradation rates of PLA/m-MMT nanocomposites are also discussed in this study.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polymer Degradation and Stability - Volume 91, Issue 9, September 2006, Pages 2198-2204
نویسندگان
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