PREPARATION AND CHARACTERIZATION OF NEW BIODEGRADABLE MATERIALS: POLY(LACTIC ACID)/LAYERED DOUBLE HYDROXIDES NANOCOMPOSITES

摘要

Over the past decade, significant attention has been focused on polymer/clay nanocomposites due to their superiority properties, such as excellent physical and mechanical properties compared to those of neat polymer [1]. Poly(lactic acid) (PLA), one of the ecological materials, has been widely studied because its renewable resources, biodegradable and biocompatible quality [2]. Layered double hydroxides (LDHs) containing anionic interface possess smaller gallery than montmorillonite (MMT) due to their stronger electrostactic interaction between hydroxylate layers [3]. Although a lot of studies have been made on PLA/MMT nanocomposites [4], PLA/LDHs nanocomposites have never been studied. In this article, we have synthesized LDHs with different Mg/AI molar ratio and then mixed PLA with the surface modification of LDHs by PLA-COOH.