Issue 1, 2017

Synthesis and formulation of functional bionanomaterials with superoxide dismutase activity

Abstract

Layered double hydroxide (LDH) nanoparticles were prepared and used as solid support for superoxide dismutase (SOD) enzymes. Structural features were studied by XRD, spectroscopic methods (IR, UV-Vis and fluorescence) and TEM, while colloidal stability of the obtained materials was investigated by electrophoresis and light scattering in aqueous dispersions. The SOD quantitatively adsorbed on the LDH by electrostatic and hydrophobic interactions and kept its structural integrity upon immobilization. The composite material showed moderate resistance against salt-induced aggregation in dispersions, therefore, heparin polyelectrolyte was used to improve the colloidal stability of the system. Heparin of highly negative line charge density strongly adsorbed on the oppositely charged hybrid particles leading to charge neutralization and overcharging at appropriate polyelectrolyte loading. Full coverage of the composite platelets with heparin resulted in highly stable dispersions, which contained only primary particles even at elevated ionic strengths. Our results indicate that the developed bionanocomposite of considerable enzymatic function is a suitable candidate for applications, wherever stable dispersions of antioxidant activity are required for instance in biomedical treatments or in chemical manufacturing processes.

Graphical abstract: Synthesis and formulation of functional bionanomaterials with superoxide dismutase activity

Supplementary files

Article information

Article type
Paper
Submitted
28 Sep 2016
Accepted
30 Nov 2016
First published
01 Dec 2016
This article is Open Access
Creative Commons BY license

Nanoscale, 2017,9, 369-379

Synthesis and formulation of functional bionanomaterials with superoxide dismutase activity

M. Pavlovic, P. Rouster and I. Szilagyi, Nanoscale, 2017, 9, 369 DOI: 10.1039/C6NR07672F

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements