Influence of the polymer molecular weight on the microstructure of hybrid materials prepared by γ-irradiation

被引：8

作者：

Lancastre, Joana J. H. ^{[1
]}

Falcao, Antonio N. ^{[1
]}

Margaca, Femanda M. A. ^{[1
]}

Ferreira, Luis M. ^{[1
]}

Miranda Salvado, Isabel M. ^{[2
,3
]}

Casimiro, Maria H. ^{[4
]}

Almasy, Laszlo ^{[5
]}

Meiszterics, Aniko ^{[6
]}

机构：

[1] Univ Lisbon, Inst Super Tecn, C2TN, P-2695066 Bobadela, Lrs, Portugal

[2] Univ Aveiro, CICECO, P-3810193 Aveiro, Portugal

[3] Univ Aveiro, Dept Engn Mat & Ceram, P-3810193 Aveiro, Portugal

[4] Univ Nova Lisboa, Fac Ciencias & Tecnol, Dept Quim, REQUIMTE CQFB, P-2829516 Caparica, Portugal

[5] Inst Solid State Phys & Opt, Wigner Res Ctr Phys, H-1525 Budapest, Hungary

[6] Gedeon Richter Chem Works Ltd, H-1475 Budapest, Hungary

来源：

RADIATION PHYSICS AND CHEMISTRY | 2015年 / 106卷

基金：

欧盟第七框架计划;

关键词：

Hybrid materials; Gamma irradiation; Microstructure; Molecular weight;

D O I：

10.1016/j.radphyschem.2014.06.023

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：

Hybrid materials have been the object of intense research due to their potential for biomedical applications as well as in other fields. They are usually prepared by sol-gol but the method of gamma irradiation of the precursors is an alternative avoiding the addition of any other chemicals. The study of the hybrids prepared by this method has been progressing to understand the impact of different variables on the microstructure. In this work, the influence of the polymer's molecular weight on the microstructure of the materials is investigated. Hybrids were obtained from a mixture of polydimethylsiloxane (PDMS) silanol terminated, tetraethylorthosilicate (TEOS) and zirconium propoxide (PrZr) in the wt% composition 20PDMS-73TEOS-7PrZr varying only the PDMS molecular weight. The obtained materials are homogeneous, transparent and flexible and their microstructure was analysed by Scanning Electron Microscopy (SEM) and Small-Angle Neutron Scattering (SANS). It was found that different microstructures were obtained, depending on the polymer molecular weight. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：126 / 129

页数：4

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