Effect of nanoclay on optical properties of PLA/clay composite films

被引：41

作者：

Cele, H. M. ^{[1
,2
]}

Ojijo, V. ^{[1
]}

Chen, H. ^{[1
]}

Kumar, S. ^{[1
]}

Land, K. ^{[1
]}

Joubert, T. ^{[1
]}

de Villiers, M. F. R. ^{[1
]}

Ray, S. S. ^{[1
,2
,3
]}

机构：

[1] CSIR, ZA-0001 Pretoria, South Africa

[2] Univ Johannesburg, Dept Appl Chem, ZA-2018 Johannesburg, South Africa

[3] CSIR, Natl Ctr Nanostruct Mat, DST, ZA-0001 Pretoria, South Africa

来源：

POLYMER TESTING | 2014年 / 36卷

关键词：

Ellipsometry; Composites; Nanoparticles; Polylactide; POLYLACTIDE/LAYERED SILICATE NANOCOMPOSITES; PERFORMANCE; CLAY;

D O I：

10.1016/j.polymertesting.2014.03.010

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

This article reports the modification of optical properties of biodegradable/biocompatible polylactide (PLA) using organically modified montmorillonite (OMMT) for microcantilever applications. PLA/OMMT composite films with various OMMT loadings (3, 5 and 7 wt%) were prepared using solvent casting. The surface morphology of the PLA/OMMT composites was examined using scanning electron and atomic force microscopes. The morphological results indicated that the surface roughness increases as a function of the clay loading. The optical properties of the PLA/OMMT composites were studied using variable angle spectroscopic ellipsometry (VASE) and ultra-violet (UV-Vis) spectroscopy. VASE revealed that the refractive index and extinction coefficient (n and k) positively correlated with the thickness of the film. UV-Vis spectroscopy also demonstrated that the absorption of light by PLA/OMMT composite films positively correlated with the clay content in the visible range of the electromagnetic spectrum. To enhance the reflectivity, PLA/OMMT films were coated with a gold layer. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：24 / 31

页数：8

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