The enhancement of the oxidation resistance of carbonyl iron by polyaniline coating and consequent changes in electromagnetic properties

被引：76

作者：

Abshinova, Madina A. ^{[2
]}

Kazantseva, Natalia E. ^{[2
,3
]}

Saha, Petr ^{[2
]}

Sapurina, Irina ^{[4
,5
]}

Kovarova, Jana ^{[1
]}

Stejskal, Jaroslav ^{[1
]}

机构：

[1] Acad Sci Czech Republ, Inst Macromol Chem, CR-16206 Prague 6, Czech Republic

[2] Tomas Bata Univ Zlin, Fac Technol, Ctr Polymer, Zlin 76272, Czech Republic

[3] Russian Acad Sci, Inst Radioengn & Elect, Fryazino 141190, Moscow Region, Russia

[4] Russian Acad Sci, Inst Macromol Cpds, St Petersburg 199004, Russia

[5] Russian Acad Sci, AF Ioffe Physicotech Inst, St Petersburg 194021, Russia

来源：

POLYMER DEGRADATION AND STABILITY | 2008年 / 93卷 / 10期

关键词：

Carbonyl iron; Polyaniline; Conducting polymer; Corrosion protection; Magnetic permeability; Dielectric permittivity;

D O I：

10.1016/j.polymdegradstab.2008.07.008

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

In order to enhance the stability of commercially unmodified processed carbonyl iron (CI) and to prevent corrosion, CI powders were coated with polyaniline (PANI) by using surfactant-stabilized PANI colloids in chloroform. PANI coats the individual particles with a film of a few micrometres thickness. Electromagnetic properties, as well as thermal and storage stability, of polymer composites filled with pristine and PANI-coated CI have been studied. The PANI overlayer has negligible influence on the magnetic and dielectric spectra of CI-filled polymer composites at ambient temperature. However, the temperature-frequency study of complex permittivity demonstrated that the composites containing PANI-coated Cl powders are characterized by temperature-independent dielectric spectra, whereas the complex permittivity of polymer composites with pristine powders drastically decreased at elevated temperature. Additionally, the thermogravimetric analysis of pristine and PANI-coated CI powders in air has shown improvement in the stability. PANI overlayer prevents the oxidation of particles and acts as corrosion protection of CI. (C) 2008 Elsevier Ltd. All rights reserved.

引用

页码：1826 / 1831

页数：6

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