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|標題:||Biodegradable poly(lactic acid)/chitosan-modified montmorillonite nanocomposites: Preparation and characterization||作者:||Wu, T.M.
|關鍵字:||poly(lactic acid);nanocomposite;chitosan;dynamic mechanical property;biodegradability;polylactide/layered silicate nanocomposites;poly(l-lactic acid);drug-delivery;enzymatic degradation;blends;intercalation;composites;polyesters;morphology;polymers||Project:||Polymer Degradation and Stability||期刊/報告no：:||Polymer Degradation and Stability, Volume 91, Issue 9, Page(s) 2198-2204.||摘要:||
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 trimethylammonium 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. (c) 2006 Elsevier Ltd. All rights reserved.
|Appears in Collections:||材料科學與工程學系|
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