The potential of starch-chitosan blends with poloxamer for the preparation of microparticles by spray-drying

Barranco-García, Juan Enrique; Caicedo, Carolina; Jiménez-Regalado, Enrique Javier; Espinoza-González, Carlos; Morales, Graciela; Aguirre-Loredo, Rocio Yaneli; Fonseca-García, Abril

doi:10.1016/j.partic.2023.10.004

Cited by 3 publications

(2 citation statements)

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“…This work obtained smaller particle sizes of chitosan microspheres compared to other studies [42] in preparing this type of microspheres by the SD method. The above may be due to factors such as the presence of other polymers in the raw materials for preparing microspheres and the various operational variables of the SD process.…”

Section: Resultsmentioning

confidence: 56%

“…This drying process is regulated by the molecular interactions between the different components of the feedstock, which in turn affect the distribution of particle sizes and the interactions between particles. It has also been reported [42,43] that A small droplet size results in the quick formation of a dense and impermeable shell, which is determined by the concentration and plasticity of the polymer. The particle experiences an increase in internal pressure as a result of the trapping of the solvent.…”

Section: Resultsmentioning

confidence: 95%

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Arsenate Adsorption from Aqueous Solutions Using Chitosan/Fe‐Nanoparticles Composite Microspheres

Manzo‐Valencia,

Alfaro‐Cuevas‐Villanueva,

Zárate‐Medina

et al. 2024

ChemistrySelect

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The adsorption behavior and synthesis of a chitosan microsphere composite with iron nanoparticles (Ch‐Fe) for the removal of arsenates [As(V)] from aqueous solutions were investigated. First, the chitosan microspheres (Ch‐SD) were obtained using the Spray Dryer volatilization technique (SD), optimizing their particle size. Then, the iron nanoparticles (Fe‐NPs) were prepared using the microwave precipitation technique. The composite was characterized, and the arsenate adsorption parameters were determined through batch‐type experiments. Significantly fast adsorption rates were observed for both adsorbents. Besides, Ch‐Fe and Ch‐SD effectively removed arsenates over a wide pH range. The hydroxyl and amino functional groups are involved in removing arsenates. The Pseudo‐second order and the Elovich models described arsenate kinetic sorption data for Ch‐Fe and Ch‐SD, respectively. The As(V) maximum adsorption capacities were 27.46 mg/g and 29.94 mg/g for Ch‐SD and Ch‐Fe, respectively, increasing significantly at elevated temperatures. The Langmuir‐Freundlich model adequately described the isothermal data for both materials, suggesting adsorption heterogeneity. The composite's surface impregnation with Fe‐NPs enhanced the Ch‐SD adsorption properties. The SD method was suitable for obtaining the chitosan/Fe‐NPs microspheres and effectively removed As(V) from aqueous solutions.

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Section: Resultsmentioning

confidence: 56%

Section: Resultsmentioning

confidence: 95%