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Size-controlled synthesis of chitosan nanoparticles and their structural characterization

Published online by Cambridge University Press:  04 June 2014

Angélica M. Quiñones-Méndez ,
Oscar Perales-Pérez  and
Yarilyn Cedeño-Mattei
Angélica M. Quiñones-Méndez
Affiliation:
Department of Crop and Environmental Sciences, University of Puerto Rico, Mayaguez Campus
Oscar Perales-Pérez
Affiliation:
Department of Engineering Science and Materials, University of Puerto Rico, Mayaguez Campus Department of Chemistry Department, University of Puerto Rico, Mayaguez Campus
Yarilyn Cedeño-Mattei
Affiliation:
Department of Engineering Science and Materials, University of Puerto Rico, Mayaguez Campus Department of Chemistry Department, University of Puerto Rico, Mayaguez Campus
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Abstract

The agricultural industry worldwide is facing several challenges including environmental pollution problems (soils and water) caused by the unsuitable control on the use of agrochemicals. Recently, nanotechnology has become an option to improve the existing crop management techniques. Polymer nanoparticles can be used for storage and controlledrelease of agrochemicals, such as pesticides and fertilizers. In this regard, chitosan nanoparticles have been considered for agricultural applications due to the capability of size control at the nanoscale and porosity control capability, in addition to biodegradable and biocompatible characteristics. On this basis, this work focuses on the development of a sizecontrolled synthesis method for chitosan nanoparticles for further use as a platform for the controlled-release system of agrochemicals. The chitosan nanoparticles were synthesized by polymerization using methacrylic acid in water. Several chitosan precursor concentrations (0.2- 0.8 wt.%) were evaluated in order to manipulate the size of produced nanoparticles. The hydrodynamic diameter of those nanoparticles was determined by using a Malvern Zetasizer and the suspension stability trough zeta potential measurements. The morphology and geometrical size were investigated by Transmission Electron Microscopy (TEM). Chitosan nanoparticles size was around 17 nm when a precursor 0.2 wt.% chitosan solution was used. X-ray diffraction and Fourier Transform Infrared Spectroscopy techniques confirmed the chitosan nanoparticles formation and its interaction with functional groups of methacrylic acid.

Keywords

nanoscalepolymerbiomaterial
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1685: Symposium U – Soft Nanomaterials , 2014 , mrss14-1685-u09-04
Copyright
Copyright © Materials Research Society 2014 

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References

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