Citation: XIA Juan, SONG Le-Xin, DANG Zheng, SHAO Zhi-Cheng. Polyethylene Glycol/Fe₃O₄ Nanoparticle Composite Materials: Structure, Physical Properties and Application[J]. Acta Physico-Chimica Sinica, ;2013, 29(07): 1524-1533. doi: 10.3866/PKU.WHXB201304273 shu

Polyethylene Glycol/Fe₃O₄ Nanoparticle Composite Materials: Structure, Physical Properties and Application

1.
1 CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineerin, University of Science and Technology of China, Hefei 230026, P. R. China;
2 Department of Chemistry, University of Science and Technology of China, Hefei 230026, P. R. China

Received Date: 25 February 2013
Available Online: 27 April 2013
Fund Project: 国家自然科学基金(21071139)资助项目 (21071139)

Fe₃O₄ nanoparticles with a highly symmetric octadecahedral nanobox structure were fabricated using β-cyclodextrin as a protection agent. A series of composites (CM-1-CM-4) of polyethylene glycol (PEG) and Fe₃O₄ nanoparticles with different initial mass ratios were prepared using a colloid process. We found that the shape of the composites depended on the amount of Fe₃O₄ nanoparticles. In particular, the melting process of PEG was not only influenced by the presence of Fe₃O₄ nanoparticles, but also by their amount. We also noticed that the crystallinity of PEG lowered upon compositing with Fe₃O₄ nanoparticles, and decreased as the amount of Fe₃O₄ nanoparticles increased with the exception of CM-4. Interestingly, the degradation of PEG was affected by the Fe₃O₄ nanoparticles, leading to the appearance of different degradation products. Like the initial Fe₃O₄ nanoparticles, the Fe₃O₄ components in the composites exhibited typical soft ferromagnetism but possessed much lower saturation magnetizations. X-ray photoelectron spectroscopy (XPS) experiments revealed that electronic shift occurred from iron to oxygen. The resulting decrease in the electronic density of iron explained the observed decrease in saturation magnetizations of the composites. The composites induced strong surface-enhanced Raman scattering of organic dyes that depended on the amount of Fe₃O₄ nanoparticles in the composite. This study contributes to the development of composite materials combining polymers with inorganic nanoparticles.
- Nanoparticle,
- Polyethylene glycol,
- Fe₃O₄,
- Microwave absorption,
- Soft ferromagnetism,
- Composite
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