Open AccessPreparation of Boronic Acid-Functionalized Magnetic Nano-Particles by Polarity-regulating Molecular Self-assembly
Author(s) -
Wenkai Cheng,
Pinjun Mo,
Fei Chen,
Meng Deng,
Jinbao Xu,
Wei Wang,
Guofu Zhong
Publication year - 2019
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/585/1/012055
Subject(s) - nanoparticle , adsorption , oleic acid , thermogravimetric analysis , fourier transform infrared spectroscopy , materials science , chemical engineering , magnetic nanoparticles , coprecipitation , boronic acid , transmission electron microscopy , infrared spectroscopy , nuclear chemistry , analytical chemistry (journal) , chemistry , inorganic chemistry , nanotechnology , organic chemistry , biochemistry , engineering
Boronic acid-functionalized magnetic nanoparticles were prepared and characterized in this investigation. At first, the single-layer oleic acid-coated Fe 3 O 4 magnetic nanoparticles were prepared by the chemical coprecipitation method and then the nanoparticles were surface-modified by a layer of poly(4-vinylphenylboronic acid) by the polarity-regulating molecular self-assembly technique to obtain the boronic acid-functionalized magnetic nanoparticles (Fe 3 O 4 @OA@BA). The resulted nanoparticles were characterized by Fourier transform infrared spectroscopy (FT-IR), thermogravimetric analyzer (TGA), transmission electron microscope (TEM) and vibrating sample magnetometer (VSM). The results show that the molecules of oleic acid can form the inner layer chemisorption on the surface of Fe 3 O 4 and the double-layer coating structure on the outer layer. The poly(4-vinylphenylboronic acid) coated nanoparticles with content about 26% have an average size of 15 nm and the saturation magnetization of 43 emu/g. Finally, the adsorption effect of Fe 3 O 4 @OA@BA on bovine serum albumin (BSA) was studied. Under optimal adsorption conditions, the adsorption capacity on BSA is 135μg/mg, which embodies the superiority of molecular self-assembly to prepare functionalized nanoparticles.