Studies on the thermodynamics and solute–solvent interaction of Polyvinyl pyrrolidone wrapped single walled carbon nanotubes (PVP-SWNTs) in water over temperature range 298.15–313.15 K

Mohamed, Malahah; Tripathy, Minaketan; Majeed, Abu Bakar Abdul

doi:10.1016/j.arabjc.2013.06.022

Cited by 10 publications

(2 citation statements)

References 24 publications

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“…These combinations of properties predestine its employment in numerous applications in medicine pharmaceutical technology, cosmetic and in the technical industry [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

Novel polyvinylpyrrolidone nanocomposites with dispersed poly(amide-imide)/nano-ZrO2 as new nano-filler: morphology, thermal and optical properties

Mallakpour

Mani

2015

Polym. Bull.

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In this paper, ultrasonic technique and a biocompatible coupling agent were used for the surface modification of ZrO 2 nanoparticles (NPs). The grafting of N-trimellitylimido-L-leucine as bioactive and biocompatible coupling agent on the surface of ZrO 2 NPs was confirmed by Fourier transmission infrared spectroscopy and thermogravimetric analysis. Subsequently, the modified NPs were incorporated into the poly(amide-imide) (PAI) matrix through good dispersion. Therefore, poly(amide-imide)/nano-ZrO 2 nanocomposite (PAI/nano-ZrO 2 ) was synthesized via ultrasonic technique. Field emission scanning electron microscopy and transmission electron microscopy images of the obtained PAI/nano-ZrO 2 illustrated nanostructured morphology. Then, PAI/nano-ZrO 2 was used as a nano-filler and was embedded into the polyvinylpyrrolidone (PVP) in various weight percent to form PVP NCs to improve its properties. These NCs were investigated by different analyses. Change in the results of analysis when compared to the pure PVP confirmed that there are good interactions between nano-filler and the PVP matrix as a result of hydrogen bonding. The thermal stability of the PVP was enhanced with the addition of small amounts of nano-filler. Also, the incorporation of the PAI/nanoZrO 2 influenced the UV-Vis absorption of the pure PVP.

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“…These combinations of properties predestine its employment in numerous applications in medicine pharmaceutical technology, cosmetic and in the technical industry [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

Novel polyvinylpyrrolidone nanocomposites with dispersed poly(amide-imide)/nano-ZrO2 as new nano-filler: morphology, thermal and optical properties

Mallakpour

Mani

2015

Polym. Bull.

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“…Data such as conductometric and volumetric measurements at different temperatures are crucial to illustrate the thermodynamics involved and related solute–solvent interactions. 18 Therefore, in this article, we investigated the feasibility of arginine (ARG), which had been reported as a solubility enhancer, 19 , 20 in improving the solubility of SMV. This comprised the investigation on the phase solubility study, densities, and conductivities for several concentrations of SMV–ARG binary solution mixture at T of 298.15 K, 303.15 K, 308.15 K, and 313.15 K. The parameters related to this study such as the Gibbs free energy of transfer

, limiting molar conductance (Λ 0 ), association constants ( K A ), and related thermodynamic parameters (Δ G 0 , Δ H 0 , Δ S 0 , and E s ) were calculated.…”

Section: Introductionmentioning

confidence: 99%

Solubility enhancement of simvastatin by arginine: thermodynamics, solute–solvent interactions, and spectral analysis

Affandi¹,

Tripathy²,

Majeed³

2016

DDDT

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We examined the solubility of simvastatin in water in 0.01 mol·dm−3, 0.02 mol·dm−3, 0.04 mol·dm−3, 0.09 mol·dm−3, 0.18 mol·dm−3, 0.36 mol·dm−3, and 0.73 mol·dm−3 arginine (ARG) solutions. The investigated drug is termed the solute, whereas ARG the cosolute. Phase solubility studies illustrated a higher extent of solubility enhancement for simvastatin. The aforementioned system was subjected to conductometric and volumetric measurements at temperatures (T) of 298.15 K, 303.15 K, 308.15 K, and 313.15 K to illustrate the thermodynamics involved and related solute–solvent interactions. The conductance values were used to evaluate the limiting molar conductance and association constants. Thermodynamic parameters (ΔG0, ΔH0, ΔS0, and Es) for the association process of the solute in the aqueous solutions of ARG were calculated. Limiting partial molar volumes and expansibilities were evaluated from the density values. These values are discussed in terms of the solute–solvent and solute–cosolute interactions. Further, these systems were analyzed using ultraviolet–visible analysis, Fourier-transform infrared spectroscopy, and 13C, 1H, and two-dimensional nuclear overhauser effect spectroscopy nuclear magnetic resonance to complement thermophysical explanation.

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Molecular dynamics and related solution chemistry of lovastatin in aqueous solution of arginine: Viscometric analysis

Zolkiflee

Affandi

Majeed

2019

Journal of Molecular Liquids

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Studies on the thermodynamics and solute–solvent interaction of Polyvinyl pyrrolidone wrapped single walled carbon nanotubes (PVP-SWNTs) in water over temperature range 298.15–313.15 K

Cited by 10 publications

References 24 publications

Novel polyvinylpyrrolidone nanocomposites with dispersed poly(amide-imide)/nano-ZrO2 as new nano-filler: morphology, thermal and optical properties

Novel polyvinylpyrrolidone nanocomposites with dispersed poly(amide-imide)/nano-ZrO2 as new nano-filler: morphology, thermal and optical properties

Solubility enhancement of simvastatin by arginine: thermodynamics, solute–solvent interactions, and spectral analysis

Molecular dynamics and related solution chemistry of lovastatin in aqueous solution of arginine: Viscometric analysis

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Studies on the thermodynamics and solute–solvent interaction of Polyvinyl pyrrolidone wrapped single walled carbon nanotubes (PVP-SWNTs) in water over temperature range 298.15–313.15 K

Cited by 10 publications

References 24 publications

Novel polyvinylpyrrolidone nanocomposites with dispersed poly(amide-imide)/nano-ZrO2 as new nano-filler: morphology, thermal and optical properties

Novel polyvinylpyrrolidone nanocomposites with dispersed poly(amide-imide)/nano-ZrO2 as new nano-filler: morphology, thermal and optical properties

Solubility enhancement of simvastatin by arginine: thermodynamics, solute&ndash;solvent interactions, and spectral analysis

Molecular dynamics and related solution chemistry of lovastatin in aqueous solution of arginine: Viscometric analysis

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Solubility enhancement of simvastatin by arginine: thermodynamics, solute–solvent interactions, and spectral analysis