Stability of poly(L-lactide)/TiO2 nanocomposite thin films under UV irradiation at 254 nm

被引：34
|
作者：
Wang, Wei-Wei [1 ,2 ]
Man, Chang-Zhen [1 ]
Zhang, Chun-Mei [1 ]
Jiang, Long [1 ]
Dan, Yi [1 ]
Thien-Phap Nguyen [2 ]
机构：
[1] Sichuan Univ, Polymer Res Inst, State Key Lab Polymer Mat Engn China, Chengdu 610065, Peoples R China
[2] Inst Mat Jean Rouxel, F-44322 Nantes, France
来源：
POLYMER DEGRADATION AND STABILITY | 2013年 / 98卷 / 04期
基金：
中国国家自然科学基金; 高等学校博士学科点专项科研基金;
关键词：
Poly(L-lactide); Rutile titania; Anatase titania; Nanocomposite; UV irradiation; Stability; MULTIPLE MELTING BEHAVIOR; HYDROLYTIC DEGRADATION; RUTILE; ACID); CRYSTALLIZATION; NANOPARTICLES; COMPOSITES; DIOXIDE; ANATASE;
D O I：
10.1016/j.polymdegradstab.2013.01.003
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Poly(L-lactide)/titania (PLLA/TiO2) nanocomposites were in situ synthesized through ring-opening polymerization of L-lactide. Two types of TiO2, anatase and rutile, were used in the synthesis of composites. The chemical structure, crystallinity, thermal stability and morphology of composite thin films were analyzed by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), thermogravimetric analysis (TGA) and scanning electron microscopy (SEM). The effects of TiO2 on the stability of the nanocomposites under UV irradiation as a function of time were investigated by FTIR, XRD, UV absorption spectroscopy and differential scanning calorimetry (DSC). The obtained results indicated that rutile TiO2 particles have a screening effect while anatase TiO2 acts as a photocatalyst The DSC results revealed that anatase TiO2 embedded in bulk of the films produces the same effect as rutile TiO2. (C) 2013 Elsevier Ltd. All rights reserved.
引用
收藏
页码：885 / 893
页数：9
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