Issue 16, 2010
From the journal:

Soft Matter

Structure and viscoelastic properties of hybrid ferrogels with iron oxide nanoparticles synthesized in situ

Rebeca Hernández,*a   Javier Sacristán,a   Aurora Nogales,b   Manuel Fernández,c   Tiberio A. Ezquerrab  and  Carmen Mijangosa  

* Corresponding authors

a Instituto de Ciencia y Tecnología de Polímeros, CSIC, Juan de la Cierva, 3, Madrid, Spain
E-mail: rhernandez@ictp.csic.es
Fax: +34 91 564 48 53
Tel: +34 91 562 29 00

b Instituto de Estructura de la Materia, CSIC, Serrano 119, Madrid, Spain

c ID02, European Synchrotron Radiation Facility, BP 220, Grenoble, France

Abstract

Ultra small angle X-ray scattering (USAXS) experiments in the q-range (10−4–0.2 Å) were performed to determine the structure of iron oxide NPs in situ synthesized inside semi-interpenetrating polymer networks (semi-IPNs) of linear alginate and crosslinked poly(N-isopropylacrylamide) (PNiPAAm). Results from the fitting of USAXS experiments were related with the reinforcement and swelling properties exhibited by the hybrid semi-IPNs which, in turn, were found to be highly dependant on the alginate concentration and the volume fraction of iron oxide nanoparticles. The USAXS findings, along with those from rheological and swelling measurements, allow determining whether iron oxide nanoparticles are bonded to the polymer matrix or if they are simply ‘packed’ inside the polymer network without interaction with the polymer chain.

Graphical abstract: Structure and viscoelastic properties of hybrid ferrogels with iron oxide nanoparticles synthesized in situ

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Article information

DOI
https://doi.org/10.1039/C0SM00187B
Article type
Paper
Submitted
31 Mar 2010
Accepted
22 Apr 2010
First published
16 Jun 2010

Soft Matter, 2010,6, 3910-3917

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Structure and viscoelastic properties of hybrid ferrogels with iron oxide nanoparticles synthesized in situ

R. Hernández, J. Sacristán, A. Nogales, M. Fernández, T. A. Ezquerra and C. Mijangos, Soft Matter, 2010, 6, 3910 DOI: 10.1039/C0SM00187B

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