Small-Angle X-Ray Scattering Study on PVA/Fe3O4 Magnetic Hydrogels

被引：27

作者：

Sunaryono ^{[1
,2
]}

Taufiq, Ahmad ^{[1
,2
]}

Putra, Edy Giri Rahman ^{[3
]}

Okazawa, Atsushi ^{[4
]}

Watanabe, Isao ^{[5
]}

Kojima, Norimichi ^{[6
]}

Rugmai, Supagorn ^{[7
]}

Soontaranon, Siriwat ^{[7
]}

Zainuri, Mohammad ^{[1
]}

Triwikantoro ^{[1
]}

Pratapa, Suminar ^{[1
]}

Darminto ^{[1
]}

机构：

[1] Inst Teknol Sepuluh Nopember, Dept Phys, Fac Math & Nat Sci, Kampus ITS Sukolilo, Surabaya 60111, Indonesia

[2] Univ Negeri Malang, Dept Phys, Fac Math & Nat Sci, Malang 65145, Indonesia

[3] Natl Nucl Energy Agcy Indonesia, Ctr Sci & Technol Adv Mat, Kawasan Puspiptek Serpon 15134, Tangerang, Indonesia

[4] Univ Tokyo, Dept Basic Sci, Grad Sch Arts & Sci, Meguro Ku, Komaba 3-8-1, Tokyo 1538902, Japan

[5] RIKEN, Adv Meson Lab, Nishina Accelerator Based Sci Ctr, 2-1 Hirosawa, Wako, Saitama 3510198, Japan

[6] Toyota Phys & Chem Res Inst, Yokomichi 41-1, Nagakute, Aichi 4801192, Japan

[7] Synchrotron Light Res Inst, 111 Univ Venue, Muang Dist 30000, Nakhon Ratchasi, Thailand

来源：

NANO | 2016年 / 11卷 / 03期

关键词：

SAXS; magnetic hydrogel; primary particle; secondary particle; cluster; STRUCTURAL ORGANIZATION; POLYMER GELS; NANOPARTICLES; FERROGELS; PARTICLES; BEHAVIOR; FE3O4;

D O I：

10.1142/S1793292016500272

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

A synchrotron small-angle X-ray scattering (SAXS) study on PVA/Fe3O4 magnetic hydrogels has been performed to investigate the effect of clustering on their magnetic properties. The hydrogels were prepared through freezing-thawing (F-T) processes. The structure, morphology and magnetic properties of magnetite (Fe3O4) nanoparticles (NPs) were investigated using X-ray diffractometry (XRD), transmission electron microscopy (TEM) and a superconducting quantum interference device (SQUID) magnetometer, respectively. In this study, SAXS data were used to reveal the structural dimensions of the magnetite and its distribution in the polymer-rich PVA and magnetic hydrogels. As calculated using the Beaucage and Teubner-Strey models, the average of the structural dimensions of the PVA hydrogels was 3.9 nm (crystallites), while the average distance between crystallites was approximately 18 nm. Further analysis by applying a two-lognormal distribution showed that the magnetite NPs comprised secondary particles with a diameter of 9.6 nm that were structured by primary particles (similar to 3.2 nm). A two-lognormal distribution function has also been used in describing the size distributions of magnetite NPs in magnetic hydrogels. The clusters of magnetite NPs in the magnetic hydrogels are significantly reduced from 30.4 nm to 12.8 nm with decreasing concentration of the NPs magnetite from 15 wt.% to 1 wt.%. The saturation magnetization values of the magnetite NPs, the 15% and 1% magnetic hydrogels were 34.67 emu/g, 6.52 emu/g and 0.37 emu/g, respectively.

引用

页数：12

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