Mechanism of interaction of chitosan with cobalt ferrite during synthesis by mechanochemical activation

Mechanochemical Transformations of Biomass into Functional Materials

“…[267] It was also confirmed that the coordination only happens between chitosan and cobalt to form amino-coordinated cobalt complex, while chitosan-amino-coordinated iron complex was not detected. [267] Chitosan containing composites have the potential to be used in various applications such as drug delivery agent, emulsifier, biomedicine, or high-temperature-humidity-resistant materials. [268,269] In response to the recent trend of pursuing "greener" chemical processes, mechanochemical methods have been heavily studied for their advantages over conventional methods of synthesis for this class of materials.…”

“…[267] To investigate the interaction between the starting mineral reagents and chitosan, pure chitosan was milled under the same conditions for 30 min. [267] The isolated nanocomposite were characterized by X-ray crystal analysis, transmission electron microscopy (TEM), and atomic force microscopy (AFM) to determine their phase composition, morphology, dispersity, and structural parameters. [267] It was observed on the IR spectrum that the absorption peak at 2140.9 cm À 1 , which corresponds to the associated hydrogen bonds between the OH and NH groups of chitosan, was absent on the synthesized chitosan-cobalt ferrite nanocomposite.…”

“…[267] The isolated nanocomposite were characterized by X-ray crystal analysis, transmission electron microscopy (TEM), and atomic force microscopy (AFM) to determine their phase composition, morphology, dispersity, and structural parameters. [267] It was observed on the IR spectrum that the absorption peak at 2140.9 cm À 1 , which corresponds to the associated hydrogen bonds between the OH and NH groups of chitosan, was absent on the synthesized chitosan-cobalt ferrite nanocomposite. This observation along with the significantly decreased intensities of the amino group absorption peaks suggested the prepared nanocomposite was amino-coordinated.…”

“…This observation along with the significantly decreased intensities of the amino group absorption peaks suggested the prepared nanocomposite was amino-coordinated. [267] The chitosan was also partially oxidized on the primary alcohol and amine groups as carboxylic acid and nitro absorption peaks emerged after milling. [267] It was also confirmed that the coordination only happens between chitosan and cobalt to form amino-coordinated cobalt complex, while chitosan-amino-coordinated iron complex was not detected.…”

“…[267] The chitosan was also partially oxidized on the primary alcohol and amine groups as carboxylic acid and nitro absorption peaks emerged after milling. [267] It was also confirmed that the coordination only happens between chitosan and cobalt to form amino-coordinated cobalt complex, while chitosan-amino-coordinated iron complex was not detected. [267] Chitosan containing composites have the potential to be used in various applications such as drug delivery agent, emulsifier, biomedicine, or high-temperature-humidity-resistant materials.…”