A novel facile synthesis of the amine-functionalized magnetic core coated carboxylated nanochitosan shells as an amphoteric nanobiosupport. (1st October 2019)

• Record Type: Journal Article
• Authors: Hosseini, Seyed Mehdi; Younesi, Habibollah; Bahramifar, Nader; Mehraban, Zahra
• Is Part Of: Carbohydrate polymers. Volume 221(2019)
• Page Start: 174
• Page End: 185
• Publication Date: 2019-10-01
• Subjects: Carboxylated nanochitosan -- Magnetic nanochitosan -- Core-shell -- Citric acid -- Amide moieties -- Amphoteric nanobiosupport; Polysaccharides -- Periodicals; Polysaccharides -- Periodicals; Polysaccharides -- Périodiques; Electronic journals; 547.78
• DOI: 10.1016/j.carbpol.2019.06.006
• Languages: English
• ISSNs: 0144-8617

Abstract

Graphical abstract: Highlights: A novel method of NH2 -magnetic core coated nanochitosan-COOH shell was prepared. We report the successful characterization of NCS-structured magnetic nanoparticles. The presence of amine in the nanostructure coating promoted particle stability. The dispersity of nanostructure was performed in polar and nonpolar solvents. The current work highlights the innovative use of nanochitosan-based biomaterials. Abstract: We developed a novel synthesis method for a multifunctional nanocomposite with amine-functionalized Fe3 O4 core coated with carboxylated nanochitosan shells (NH2 -Fe3 O4 @NCS-COOH) via carbodiimide activation. The chemical structures of chitosan and carboxylated nanochitosan (NCS-COOH) were verified by 1H NMR which confirmed the incorporation of citric acid by the formation of the new signal of the CH2 H-atoms. TEM image displayed the synthesized NH2 -Fe3 O4 @NCS-COOH nanoparticles were in a spherical shape with an average size of 100 nm. The results of XRD revealed that NH2 -Fe3 O4 @NCS-COOH have a good crystalline nature with the face center cubic structure and with the average crystallite size of 17 nm. The characterization using VSM showed that the magnetic nanoparticle had superparamagnetic behavior and the saturation magnetization was up to 30 emu/g. The BET specific surface area of NH2 -Fe3 O4 @NCS-COOH was 45.18 m 2 /g. The synthesized nanostructure was found to be stable in different ranges of pH due to covalent bonds between nanochitosan and Fe3 O4 .