| Full text | |
| Author(s): |
Barud, H. S.
[1, 2]
;
Tercjak, A.
[3]
;
Gutierrez, J.
[3]
;
Viali, W. R.
[1, 4]
;
Nunes, E. S.
[1]
;
Ribeiro, S. J. L.
[1]
;
Jafellici, M.
[1]
;
Nalin, M.
[1]
;
Marques, R. F. C.
[1]
Total Authors: 9
|
| Affiliation: | [1] Sao Paulo State Univ UNESP, Inst Chem, Sao Paulo - Brazil
[2] Ctr Univ Araraquara Uniara, Sao Paulo - Brazil
[3] Univ Basque Country, San Sebastian - Spain
[4] Univ Fed Sao Carlos, Dept Chem, Sao Paulo - Brazil
Total Affiliations: 4
|
| Document type: | Journal article |
| Source: | Journal of Applied Physics; v. 117, n. 17 MAY 7 2015. |
| Web of Science Citations: | 10 |
| Abstract | |
Biocellulose or bacterial cellulose (BC) is a biocompatible (nano) material produced with a three-dimensional network structure composed of microfibrils having nanometric diameters obtained by the Gluconacetobacter xylinus bacteria. BC membranes present relatively high porosity, allowing the incorporation or synthesis in situ of inorganic nanoparticles for multifunctional applications and have been used as flexible membranes for incorporation of magnetic nanocomposite. In this work, highly stable superparamagnetic iron oxide nanoparticles (SPION), functionalized with polyethylene glycol (PEG), with an average diameter of 5 nm and a saturation magnetization of 41 emu/g at 300K were prepared. PEG-Fe2O3 hybrid was dispersed by mixing a pristine BC membrane in a stable aqueous dispersion of PEG-SPION. The PEG chains at PEG-SPION's surface provide a good permeability and strong affinity between the BC chains and SPION through hydrogen-bonding interactions. PEG-SPION also allow the incorporation of higher content of nanoparticles without compromising the mechanical properties of the nanocomposite. Structural and magnetic properties of the composite have been characterized by XRD, SEM, energy-dispersive X-ray spectroscopy (EDX), magnetization, Raman spectroscopy, and magnetic force microscopy. (C) 2015 AIP Publishing LLC. (AU) | |
| FAPESP's process: | 10/20546-0 - Core@shell magnetic nanoparticles: multifunctional materials with tunable properties for technological applications |
| Grantee: | Miguel Jafelicci Junior |
| Support Opportunities: | Regular Research Grants |
| FAPESP's process: | 13/07793-6 - CEPIV - Center for Teaching, Research and Innovation in Glass |
| Grantee: | Edgar Dutra Zanotto |
| Support Opportunities: | Research Grants - Research, Innovation and Dissemination Centers - RIDC |