Preparation and characterization of novel hybrid of chitosan-g-lactic acid and montmorillonite

被引：21

作者：

Depart, Dilip ^{[1
]}

Kumar, Annamalai Pratheep ^{[1
]}

Singh, Raj Pal ^{[1
]}

机构：

[1] Natl Chem Lab, Div Polymer Sci & Engn, Pune 411008, Maharashtra, India

来源：

JOURNAL OF BIOMEDICAL MATERIALS RESEARCH PART A | 2006年 / 78A卷 / 02期

关键词：

chitosan; polylactic acid; graft copolymerization; nanocomposites; contact angle; water absorption;

D O I：

10.1002/jbm.a.30738

中图分类号：

R318 [生物医学工程];

学科分类号：

0831 ;

摘要：

The utilization of biopolymers and the development of organic-inorganic hybrids are ever increasing interest of material science researchers around the globe for various applications. The present attempt is intended to prepare nanocomposites of lactic acid grafted chitosan and layered silicates. Nanocomposites were prepared by dissolving chitosan and dispersing sodium montmorillonite in aqueous solution of L-lactic acid with subsequent heating and film casting. They were characterized by conventional techniques such as Fourier transform infrared spectroscopy, X-ray diffractometry, thermogravimetric analysis, energy dispersive X-ray spectroscopy, and elemental analysis. The results from polar optical and transmission electron microscopic measurements are also discussed. Sorption behavior of samples has been followed by measuring swelling degree and contact angle. The films have shown enhanced hydrophilicity when compared with polylactic acid (PLA). Issues on the interactions of polycationic chitosan with clay are also discussed. It is observed that nanocomposites are exhibiting better thermal and physical properties than neat chitosang-LA and PLA. (c) 2006 Wiley Periodicals, Inc.

引用

页码：372 / 382

页数：11

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