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

被引：27

作者：

Hernandez, Rebeca ^{[1
]}

Sacristan, Javier ^{[1
]}

Nogales, Aurora ^{[2
]}

Fernandez, Manuel ^{[3
]}

Ezquerra, Tiberio A. ^{[2
]}

Mijangos, Carmen ^{[1
]}

机构：

[1] CSIC, Inst Ciencia & Tecnol Polimeros, E-28006 Madrid, Spain

[2] CSIC, Inst Estruct Mat, E-28006 Madrid, Spain

[3] European Synchrotron Radiat Facil, ID02, F-38043 Grenoble, France

来源：

SOFT MATTER | 2010年 / 6卷 / 16期

关键词：

SMALL-ANGLE SCATTERING; RHEOLOGICAL PROPERTIES; GOLD NANOPARTICLES; CONTROLLED-RELEASE; AQUEOUS-SOLUTIONS; PARTICLE-SIZE; NANOCOMPOSITES; HYDROGELS; MATRIX;

D O I：

10.1039/c0sm00187b

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：

Ultra small angle X-ray scattering (USAXS) experiments in the q-range (10(-4)-0.2 angstrom) 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.

引用

页码：3910 / 3917

页数：8

共 52 条

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