International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 12 Issue: 04 | Apr 2025
p-ISSN: 2395-0072
www.irjet.net
Morphological and linear viscoelastic properties of chitosan and multiwalled carbon nanotube nanocomposites. J. R. González-Martínez1, R. Gámez-Corrales2, F. Barffuson-Dominguez2, G.T. Paredes-Quijada3 1J.R. González-Martínez, Departamento de Investigación en Física, Universidad de Sonora, Apdo. Postal 1626,
83000 Hermosillo, Sonora, México.
2R. Gámez-Corrales, Professor, Departamento de Física, Universidad de Sonora, Apdo. Postal 1626, 83000,
Hermosillo, Sonora, México. E-mail: rogelio.gamez@unison.mx.
2F. Barffuson-Dominguez, Departamento de Física, Universidad de Sonora, Apdo. Postal 1626, 83000, Hermosillo,
Sonora, México.
3G.T Paredes-Quijada, Departamento de Ciencias Químico-Biológicas, Universidad de Sonora, Hermosillo, Sonora,
México. ---------------------------------------------------------------------***--------------------------------------------------------------------strategy [10]. The data demonstrate the viability of the Abstract –
chains in terms of their size and the degree of their acetylation [11]. Given the inherent variability of these biopolymers, it is necessary to employ both molecular weight and average degree of deacetylation values for these biopolymers. The degree of deacetylation is a pivotal parameter in quantifying the relative concentration of amino groups within the polymer. A polymer containing less than 40% acetyl groups can be designated as chitosan or with a degree of deacetylation of 60%. Chitosan is a biocompatible, non-toxic, biodegradable polymer with film-forming and antimicrobial properties, rendering it a material with plenty of applications. One such application is extending the shelf life of fresh food products, including vegetables and meats, due to their high activity.
The present study investigates the morphological and linear rheological properties of chitosan and multi-walled carbon nanotubes (MWCNT) nanocomposites. A correlation is identified between the morphological properties of the nano aggregates induced by MWCNTs and their oscillatory linear rheology. The morphological properties were evaluated by atomic force microscopy. The linear rheological measurements were carried out as a function of the temperature range of 15 – 45QC in aqueous solutions and are presented herein. Atomic force microscopy (AFM) was employed to ascertain the presence and extent of hierarchical self-assembled aggregated. Key Words: Chitosan, MWCNT, nanoparticles, hierarchical structures, rheology, AFM.
1. INTRODUCTION The utilization of natural polymers in industrial processes has increased significantly. This increase is driven by a need to develop environmentally friendly products. Chitosan, a polysaccharide composed of poly[β-(1-4)-2amino-2-deoxy-D-glucopyranose] (see Figure 1), has emerged as a prominent agent in this field [1]. It is present in low concentrations in native chitin and is produced in varying degrees of deacetylation. Additionally, chitosan is present in certain fungal species [2], albeit in quantities lower than chitin. The deacetylation of chitin, a component of the exoskeleton of crustaceans such as shrimp, leads to the health engineering are notable, attributable to its antimicrobial, biocompatible, and biodegradable properties [3][4][5]. Studies have demonstrated that chitosan can promote wound healing [3]. In other fields of application, the removal of heavy metals from aqueous solutions has been demonstrated [6–8] . Conversely, the capacity of these natural materials to inhibit microbial growth suggests their potential use as biodegradable food packaging [9]. Given its innocuous nature, using chitin to combat fungi and bacteria has emerged as a viable
© 2025, IRJET
|
Impact Factor value: 8.315
Figure 1 Schematic molecular structure of chitosan and carbon nanotube. Carbon nanotubes are a class of nanomaterial composed of a sheet of benzene rings rolled on their axis[12] . These nanotubes can be rolled into one, two, or multiple layers, which impart distinct physicochemical properties,
|
ISO 9001:2008 Certified Journal
|
Page 686