Implementation of the emulsification-diffusion method by solvent displacement for polystyrene nanoparticles prepared from recycled material

Pineda-Reyes, Ana María; Delgado, Mauricio Hernández; Zambrano-Zaragoza, María L.; Leyva-Gómez, Gerardo; Mendoza‐Muñoz, Néstor; Quintanar‐Guerrero, David

doi:10.1039/d0ra07749f

Cited by 12 publications

(5 citation statements)

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“…3.1 Aceite Esencial de Cáscara de Naranja El aceite extraído del proceso de hidrodestilación tuvo un aspecto blanco cristalino. Se determinó una densidad promedio de 0,849 g/mL y una refracción de 72.0°Brix, propia del d-limoneno como se presenta en diferentes fuentes [16][17][18]. El rendimiento promedio fue de 0.24%.…”

Section: Resultados Y Discusiónunclassified

“…Según la investigación de Martínez y Tlenkopatchev, se encontró que utilizando la metátesis cruzada de caucho natural con d-limoneno y aceites esenciales, se logra un rendimiento del 80% al 95% de la reducción [14]. En educativo E. Jiménez et al, Ing-NOVA, 1(1), Enero/2022, p. 18-29 India, los investigadores desarrollaron un proceso completamente ecológico y le dieron un enfoque de reciclaje verde para obtener nanopartículas y micropartículas a partir de residuos de poliestireno expandido, el proceso utiliza solvente verde como el d-limoneno para disolver este residuo basado en un método de emulsión -difusión [15,16]. Asimismo, en Brasil investigaron la producción de tinta con residuos de piel de naranja y poliestireno expandido, buscando la utilización de dos residuos que tienen disposición final directa sin ningún uso como la piel de naranja en la industria de jugos y el EPS, encontrando que los solventes naturales no comprometen la viabilidad técnica del proceso y la economía [17].…”

Section: Introductionunclassified

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Uso de un solvente verde para la reducción del volumen del poliestireno expandido en un establecimiento educativo

et al. 2022

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El poliestireno expandido es usado ampliamente para la elaboración de una gran variedad de empaques debido a su gran resistencia y bajo peso, sin embargo, es dispuesto directamente al relleno sanitario acortando rápidamente su vida útil debido al gran volumen que ocupa. Se redujo el volumen del poliestireno expandido, generado como residuo en el servicio de alimentación estudiantil de una institución de educación superior, por medio de la utilización de un solvente verde. Se extrajo aceite esencial de cáscara de naranja a través de la técnica de hidrodestilación y se aplicó como solvente en la reducción del volumen del material recolectado. Se aplicó un diseño experimental factorial, variando las proporciones de poliestireno: aceite y la velocidad de agitación. Se logró la reducción total del volumen sólido del poliestireno en un amplio rango de las proporciones evaluadas, se observó que la velocidad de agitación fue un parámetro influyente en el tiempo de reducción del volumen sólido del poliestireno. Las condiciones óptimas encontradas fueron una proporción 1:1 de poliestireno: extracto y una velocidad de agitación de 300 rpm.

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Section: Resultados Y Discusiónunclassified

Section: Introductionunclassified

Uso de un solvente verde para la reducción del volumen del poliestireno expandido en un establecimiento educativo

et al. 2022

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“…The emulsion-diffusion method is another procedure to develop nanocarriers for bioactives. This method involves two steps: (1) the formation of an emulsion from a mixture of a partially miscible solvent in water containing the polymer, with an aqueous phase containing the stabilizer; (2) diffusion of the solvent from the internal phase by diluting the emulsion with large quantities of water, causing the entry of the polymer into a "non-solvent" phase resulting in polymer aggregates called "protonanoparticles" [273]. The emulsion-diffusion process was successfully used by Mohammed et al for Que nanoencapsulation [274].…”

Section: "Green" Approaches To Design Obnsmentioning

confidence: 99%

Organic and Biogenic Nanocarriers as Bio-Friendly Systems for Bioactive Compounds’ Delivery: State-of-the Art and Challenges

Petrovic,

Barbinta-Patrascu

2023

Materials

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“Green” strategies to build up novel organic nanocarriers with bioperformance are modern trends in nanotechnology. In this way, the valorization of bio-wastes and the use of living systems to develop multifunctional organic and biogenic nanocarriers (OBNs) have revolutionized the nanotechnological and biomedical fields. This paper is a comprehensive review related to OBNs for bioactives’ delivery, providing an overview of the reports on the past two decades. In the first part, several classes of bioactive compounds and their therapeutic role are briefly presented. A broad section is dedicated to the main categories of organic and biogenic nanocarriers. The major challenges regarding the eco-design and the fate of OBNs are suggested to overcome some toxicity-related drawbacks. Future directions and opportunities, and finding “green” solutions for solving the problems related to nanocarriers, are outlined in the final of this paper. We believe that through this review, we will capture the attention of the readers and will open new perspectives for new solutions/ideas for the discovery of more efficient and “green” ways in developing novel bioperformant nanocarriers for transporting bioactive agents.

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“…Besides, as the amount of PVA increased from 0.25 to 1% causing a reduction in the free energy, the PDI of AZI nanoparticles decreased from 0.15 to 0.11. According to the study of Pineda-Reyes 28 , PVA concentration (0.2-1%) can stabilize globules in the emulsion and hinder aggregation during diffusion in the solid-liquid interface, thus avoiding fusion and the formation of agglomerates and effective, nonionic surfactant emulsifiers that reduce the size of nanoparticles. However, due to the Osward-ripening phenomena, PDI was increased to 0.17 when the concentration of PVA was 2%.…”

Section: Effect Of Formulation Variablesmentioning

confidence: 99%

Evaluation of formulation variables on azithromycin nanoparticles prepared by emulsification solvent diffusion method using quality by design approach

Tung¹,

Nguyen²,

Nguyen³

2022

Pharm Sci Asia

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The study aims to investigate the effect of formulation variables on the characteristics of azithromycin (AZI) nanoparticles using a quality by design approach. AZI nanoparticles were prepared by the emulsification solvent diffusion method. Two critical factors, the ratio of AZI: Eudragit EPO (X1) and volume of outer aqueous medium (X2), were chosen as independent variables for central composite design. The optimized formulation was further characterized by Fourier transform infrared spectroscopy, X-ray diffractometry, transmission electron microscopy, and dissolution test. The obtained results showed variability of mean particle size, entrapment efficacy, and zeta potential from 200 to 1232 nm, 10.78 to 75.9%, and 31 to 43 mV, respectively. The main coefficients indicated that the ratio of AZI: polymer (X1) possessed a synergistic effect on mean particle size (Y1), and volume of outer aqueous medium (X2) had an antagonistic effect on particle size. The interaction between the ratio of AZI: Eudragit EPO (X1) and volume of outer aqueous medium (X2) exhibited a significant antagonistic effect on entrapment efficacy (Y2) (p<0.05). AZI existed in an amorphous state in nanoparticles that were spherical and homogeneous in shape. The nanoparticles revealed the Korsmeyer-Peppas release model, from which AZI was released faster compared to raw material.

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Implementation of the emulsification-diffusion method by solvent displacement for polystyrene nanoparticles prepared from recycled material

Abstract: A novel solvent emulsification-displacement method for obtaining polystyrene nanoparticles is reported. This process has an added value and can be an alternative for the recycling of expanded polystyrene.

Cited by 12 publications

References 61 publications

Uso de un solvente verde para la reducción del volumen del poliestireno expandido en un establecimiento educativo

Uso de un solvente verde para la reducción del volumen del poliestireno expandido en un establecimiento educativo

Organic and Biogenic Nanocarriers as Bio-Friendly Systems for Bioactive Compounds’ Delivery: State-of-the Art and Challenges

Evaluation of formulation variables on azithromycin nanoparticles prepared by emulsification solvent diffusion method using quality by design approach

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