Miscibility influence in the thermal stability and kinetic parameters of poly (3-hydroxybutyrate)/poly (ethylene terephthalate) sulphonated blends

Silva, Rafael; Carvalho, Gizilene Maria de; Muniz, Edvani C.; Rubira, Adley F.

doi:10.1590/s0104-14282010005000023

Cited by 15 publications

(4 citation statements)

References 30 publications

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“…Significant interactions between blend components and the degradation products may occur during degradation. The degree of miscibility of the components, the nature of the compositions, and the ratios in the blend determine the type of interaction [8].…”

Section: Results and Dissussionmentioning

confidence: 99%

Thermal analysis of electrolyte biopolymer degradation from brown seaweed (Turbinaria sp)

Asriza,

Nadia,

Nurhadini

2023

IOP Conf. Ser.: Earth Environ. Sci.

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The biopolymer electrolyte can potentially develop solar cells, batteries and fuel cells. Biopolymer This electrolyte can be synthesized from alginate extracted from brown seaweed (Turbinaria sp). This study aims to analyze the thermal properties of biopolymer electrolyte degradation. The biopolymer electrolyte has been degraded through exposure to sunlight and UV light. The results of the TGA analysis showed a mass reduction of the biopolymer electrolyte exposure UV light by 7.15% at a temperature of 120 °C – 267 °C. This is due to oxidation-reduction reactions that cause the bonds to break in the polymer chain.

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Section: Results and Dissussionmentioning

confidence: 99%

Thermal analysis of electrolyte biopolymer degradation from brown seaweed (Turbinaria sp)

Asriza,

Nadia,

Nurhadini

2023

IOP Conf. Ser.: Earth Environ. Sci.

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“…The shape of TGA curve depends primarily upon the kinetics parameters. The values of these parameters are important in the estimation of thermal stability of the samples …”

Section: Resultsmentioning

confidence: 99%

Structural, Optical and Thermal Study on PEO‐Based Solid Polymer Electrolyte for Optical Device Applications

Chapi

Mini

Archana

et al. 2016

Macromolecular Symposia

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Summary The polymer electrolytes based polyethylene oxide‐cobalt chloride (PEO‐CoCl2) films were prepared by solution casting technique and its structural property was examined by XRD study. The XRD data revealed that the amorphous nature of polymer matrix increased with increase of dopant concentration. The absorption spectra was measured in the wave range from 200–800 nm. The direct optical band gap (Eg) found decreased with increasing the concentration of cobalt chloride. The optical activation energy was evaluated using Urbach‐edges method. The thermal properties of these films were investigated with thermogravimetric analysis (TGA). The variation in film morphology is examined by scanning electron microscopy examination (SEM). Studies on the structural and optical properties of polymer electrolyte have attracted much attention in view of their application in optical devices like electro‐chromic display devices, fuel cells, gas sensors and solid state batteries.

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“…The sample weight drops gradually as the reaction starts, then quickly over a relatively small temperature range, and then levels out when the reactants run out. The kinetics parameters have the most influence on how the TGA curve is shaped [49]. The physicochemical changes in the sample that take place as a result of heat fluctuations are monitored by DSC and TGA.…”

Section: Thermogravimetric Analysis (Dsc-tga)mentioning

confidence: 99%

High-efficiency photocatalytic degradation of antibiotics and molecular docking study to treat the omicron variant of COVID-19 infection using biosynthesized ZnO@Fe₃O₄ nanocomposites

Meneceur,

Bouafia,

Laouini

et al. 2023

Phys. Scr.

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In this study, ZnO@Fe3O4 nanocomposite (NC) was synthesized using a green synthesis method with Mentha pulegium leaf extract. Characterization techniques such as UV–vis, FTIR, SEM, TGA, and XRD were employed to confirm the formation of ZnO@Fe3O4 NC and thermogravimetric analysis to evaluate the breakdown of NC in the presence of heat. XRD analysis showed a crystallite size of about 25.59 nm and SEM images of ZnO@Fe3O4 NC revealed spherical-shaped agglomerated particles. The optical bandgap energy of the ZnO@Fe3O4 NC was estimated to be 2.51 eV for direct bandgap and 1.57 eV for allowable indirect bandgap. Photocatalytic activity of the ZnO@Fe3O4 NC was evaluated for the degradation of Amoxicillin, Cephalexin, and Metronidazole antibiotics under sunlight irradiation, showing degradation efficiencies of 71%, 69%, and 99%, respectively, suggesting the potential of ZnO@Fe3O4 NC for removal of antibiotics from waterways. First-principles theory was employed to establish the adsorption energy (Ead) of the antibiotic species, including Amoxicillin, Cephalexin, and Metronidazole, on the surface of ZnO@Fe3O4 nanocomposite, which was found to be −8.064, −8.791, and −21.385 eV, respectively, indicating strong adsorption. Furthermore, molecular docking studies were conducted to upgrade Fe3O4 nanoparticles to ZnO@Fe3O4 NC to enhance composite efficiency. Leveraging the FDA-approved use of Fe3O4 nanoparticles and their known antiviral activity, our docking experiment demonstrated promising results in the interaction between ZnO@Fe3O4 nanocomposite and the spike protein receptor-binding domain of SARS-CoV-2 S Omicron. These findings suggest that ZnO@Fe3O4 nanocomposite could potentially inhibit virus attachment to host cell receptors more stably, providing a promising avenue for further exploration in developing effective medications against SARS-CoV-2.

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Miscibility influence in the thermal stability and kinetic parameters of poly (3-hydroxybutyrate)/poly (ethylene terephthalate) sulphonated blends

Cited by 15 publications

References 30 publications

Thermal analysis of electrolyte biopolymer degradation from brown seaweed (Turbinaria sp)

Thermal analysis of electrolyte biopolymer degradation from brown seaweed (Turbinaria sp)

Structural, Optical and Thermal Study on PEO‐Based Solid Polymer Electrolyte for Optical Device Applications

High-efficiency photocatalytic degradation of antibiotics and molecular docking study to treat the omicron variant of COVID-19 infection using biosynthesized ZnO@Fe₃O₄ nanocomposites

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Miscibility influence in the thermal stability and kinetic parameters of poly (3-hydroxybutyrate)/poly (ethylene terephthalate) sulphonated blends

Cited by 15 publications

References 30 publications

Thermal analysis of electrolyte biopolymer degradation from brown seaweed (Turbinaria sp)

Thermal analysis of electrolyte biopolymer degradation from brown seaweed (Turbinaria sp)

Structural, Optical and Thermal Study on PEO‐Based Solid Polymer Electrolyte for Optical Device Applications

High-efficiency photocatalytic degradation of antibiotics and molecular docking study to treat the omicron variant of COVID-19 infection using biosynthesized ZnO@Fe3O4 nanocomposites

Contact Info

Product

Resources

About

High-efficiency photocatalytic degradation of antibiotics and molecular docking study to treat the omicron variant of COVID-19 infection using biosynthesized ZnO@Fe₃O₄ nanocomposites