Preparation and characterization of poly(lactic acid)-grafted TiO2 nanoparticles with improved dispersions

被引：74
作者：
Luo, Yan-Bing [1 ]
Wang, Xiu-Li [1 ]
Xu, Da-Yun [1 ]
Wang, Yu-Zhong [1 ]
机构：
[1] Sichuan Univ, State Key Lab Polymer Mat Engn, Coll Chem, Ctr Degradable & Flame Retardant Polymer Mat ERCE, Chengdu 610064, Peoples R China
来源：
APPLIED SURFACE SCIENCE | 2009年 / 255卷 / 15期
基金：
美国国家科学基金会;
关键词：
TiO2; nanoparticle; Poly(lactic acid); Graft; FTIR; XPS; CHARGE-TRANSFER; SURFACE; NANOCOMPOSITE; ACID; POLYMERIZATION; SILICA; ADSORPTION; FILMS; DISPERSIBILITY; FABRICATION;
D O I：
10.1016/j.apsusc.2009.02.074
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Poly(lactic acid) (PLA)-grafted TiO2 particles were prepared by in situ melt polycondensation of lactic acid onto the surface of TiO2 nanoparticles. The resulting products were characterized by FTIR, XPS, TG-FTIR, XRD analysis and electron microscopy observation so as to have a better understanding of bonding between the graft polymer and nanoparticles. New characteristic peaks of Ti-carboxylic coordination bond, the changes in the relative intensities of the infrared absorption bands of graft polymer and the two decomposition stage of PLA-grafted TiO2 confirmed that PLA was grafted on the surface of TiO2 nanoparticles. By attachment of PLA, the PLA-grafted TiO2 samples exhibited much better dispersion and a slightly larger particle size than bare TiO2 particles. PLA-grafted TiO2 nanoparticles will find wide applications in biomedical and eco-friendly materials, especially as fillers in PLA matrix. (C) 2009 Elsevier B. V. All rights reserved.
引用
收藏
页码：6795 / 6801
页数：7
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