Enhanced thermal and structural properties of partially phosphorylated polyvinyl alcohol - Aluminum phosphate (PPVA-Alpo4) nanocomposites with aluminium nitrate source

Saat, Asmalina Mohamed; Johan, Mohd Rafie

doi:10.1063/1.5010571

Cited by 5 publications

(6 citation statements)

References 33 publications

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“…Figure 2 shows the thermal analysis of PPVA-AlPO 4 composite formed with different pH values (7)(8)(9)(10)(11)(12) and from the figure, the SDTA traces indicate the broad endothermic peak in the temperature range of 30-250 • C. We observed weight losses at four different reaction stages. (1) The first stage of weight loss is due to the elimination of water/moisture from the crystals around 120 • C, and a similar stage of loss around 120-260 • C is due to the elimination of water coordinated with that of AlPO 4 .…”

Section: Thermal Analysismentioning

confidence: 90%

“…Moreover, the degradation parameters of PPVA-AlPO 4 composite, e.g., electrochemical, aqueous, and thermal stabilities, are influenced by the morphology of AlPO 4 , which depends on the pH solution applied during the formation of AlPO 4 particles. Since the solution at pH of 10, 11, and 12 produces the AlPO 4 morphology to be varied from nanoparticles, nanorods, to nanowires, it is highly necessary to investigate the effect of pH on the formation of PPVA-AlPO 4 composite [12]. Therefore, in the present study, we have investigated the effects of varied reaction pH towards the structural, thermal, and morphological characteristics of the PPVA-AlPO 4 composite.…”

Section: Introductionmentioning

confidence: 99%

“…Figure5shows the comparison of FTIR spectra for the samples prepared with different precipitation pH(7)(8)(9)(10)(11)(12), where the sample at pH 10 has the Al-OH characteristic stretching vibration band around 3786 cm −1 . Other samples prepared at the pH of7, 9, and 11 show the Al−O−P peak at 2202, 2253, and 2206 cm −1 , respectively and the bending vibration of the H−O−H plane water molecules are observed at the lower wavenumber of 1730 and 1740 cm −1 .…”

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confidence: 99%

“…XRD data for 2θ value, d-spacing, and FWHM for PPVA-AlPO 4 nanocomposite samples at different pH values(7)(8)(9)(10)(11)(12).…”

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confidence: 99%

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Influence of Reaction pH towards the Physicochemical Characteristics of Phosphorylated Polyvinyl Alcohol-Aluminum Phosphate Nanocomposite

et al. 2021

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The present study deals with the formation of a phosphorylated polyvinyl alcohol (PPVA)-Aluminum Phosphate (AlPO4) nanocomposite, changing the pH solution under the two-step process involving the phosphorylation of polyvinyl alcohol (PVA) followed by the conjugation with AlPO4. The composite was formed by varying the pH of the solution in the range of 7–12 and the reflected changes in the product’s morphology, crystallinity, surface nature, thermal stability, etc. were recorded using FESEM, XRD, FTIR, UV-Vis spectroscopy, TGA, etc. From the analysis, it was found that the particles formed with two different sizes of the probed pH, and at pH 10 they were homogeneously distributed. In addition, the morphology of the PPVA-AlPO4 composite also seems to be altered with respect to the pH and this is due to the differences in the amount of H+ and OH− anions. Thus, from the overall analysis, it can be indicated that pH 10 needs to be maintained for the formation of a spherical shape and uniformly distributed PPVA-AlPO4 nanocomposite.

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Section: Thermal Analysismentioning

confidence: 90%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

“…XRD data for 2θ value, d-spacing, and FWHM for PPVA-AlPO 4 nanocomposite samples at different pH values(7)(8)(9)(10)(11)(12).…”

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confidence: 99%

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Influence of Reaction pH towards the Physicochemical Characteristics of Phosphorylated Polyvinyl Alcohol-Aluminum Phosphate Nanocomposite

et al. 2021

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“…PPVA was prepared according to a literature method. − Briefly, 2.0 g of PVA, 10 mL of phosphoric acid (85%, w/w), and 1.0 g of carbamide were mixed with 10 mL of ultrapure water and heated to 90 °C with constant magnetic stirring for 3 h to esterify the PVA with phosphoric acid. The solution was then cooled to room temperature and the solid matter was separated by pouring in 50 mL of ethanol slowly with stirring.…”

Section: Methodsmentioning

confidence: 99%

Clinical Chemistry Route for Investigation of Alzheimer’s Disease: A Label-Free Electrochemiluminescent Biosensor for Glycogen Synthase Kinase-3 Beta

Tan

2019

ACS Chem. Neurosci.

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Herein, we report a novel label-free electrochemiluminescent (ECL) biosensor for the detection of glycogen synthase kinase-3 beta (GSK-3β). A simple and feasible sensor was prepared by a two-step process. A polymeric coordination layer of phosphorylated poly vinyl with Zr 4+ was used as the sensory hosting matrix because it efficiently formed a complex. The exterior Zr 4+ can further combine with another phosphate through coordination, and GSK-3β catalyzes the phosphorylation of protein molecules. Thus, the biosensor can detect GSK-3β using luminol as an ECL probe. The ECL intensity of the proposed sensor responded proportionally to the concentration of GSK-3β under direct immersion mode with a linear response in a logarithmic scale over the wide range from 0.5 to 91.5 ng L −1 and a detection limit of 0.055 ng L −1 . Excellent selectivity, stability, and reproducibility were achieved using the prepared biosensor, which has a simple preparation, low cost, and disposable suitability. This work aims to provide a novel tool for early diagnosis and pathological mechanism exploration about AD by detecting inchoate change of GSK-3β content in body fluid, thus to precaution the risk of Alzheimer's disease. It is of great importance for clinical chemistry for the investigation of Alzheimer's disease.

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Polyvinyl Alcohol‐Conjugated L‐Cysteine: A Novel Metal Pincer for Efficient Heavy Metal Ions Removal from Wastewater

Mahmoud,

Atia,

Abdalla

2024

ChemistrySelect

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A facilely prepared composite based on Polyvinyl alcohol anchored‐ L‐cysteine (PVA‐L‐CYS) demonstrated efficient functionality in the elimination of heavy metals (Hg, Cr, Pb, and Cd) from working wastewater. The synthesis of the composite was validated through a comprehensive characterization utilizing various analytical techniques to ensure the composite‘s structural, chemical, and physical properties. At ambient temperature, pH of 4–5.5, interaction time of 15–20 minutes, and concentration of 200 mg/L metal ions, the composite exhibited a maximum retention capacity of 48.5, 25, 45.25, and 44.25 mg/g for Hg, Cr, Pb, and Cd, respectively. Langmuir modeling was establish to be more fitting to the practical results than Freundlich, providing theoretical values of 49.02, 25.97, 46.08, and 44.84 mg/g for Hg, Cr, Pb, and Cd, respectively. The kinetics of PVA‐L‐CYS composite was accurately predicted by model of the pseudo‐first‐order kinetic. Thermodynamic prospects indicated a spontaneous, exothermic, and favorable uptake process at low temperatures. Efficient elution of the heavy metal ions from the overloaded composite was performed using 1 M HNO3. In accordance with WHO and FAO guidelines, the successful elimination of working metal ions from wastewater utilizing the PVA‐L‐CYS composite was demonstrated in a single cycle before discharge into the marine environment.

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Enhanced thermal and structural properties of partially phosphorylated polyvinyl alcohol - Aluminum phosphate (PPVA-Alpo4) nanocomposites with aluminium nitrate source

Cited by 5 publications

References 33 publications

Influence of Reaction pH towards the Physicochemical Characteristics of Phosphorylated Polyvinyl Alcohol-Aluminum Phosphate Nanocomposite

Influence of Reaction pH towards the Physicochemical Characteristics of Phosphorylated Polyvinyl Alcohol-Aluminum Phosphate Nanocomposite

Clinical Chemistry Route for Investigation of Alzheimer’s Disease: A Label-Free Electrochemiluminescent Biosensor for Glycogen Synthase Kinase-3 Beta

Polyvinyl Alcohol‐Conjugated L‐Cysteine: A Novel Metal Pincer for Efficient Heavy Metal Ions Removal from Wastewater

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