Green hybrid nanocomposites from metal oxides, poly(vinyl alcohol) and poly(vinyl pyrrolidone)

Mallakpour, Shadpour; Behranvand, Vajiheh

doi:10.1016/b978-0-08-100791-4.00010-0

Cited by 9 publications

(2 citation statements)

References 63 publications

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“…The GO incorporation to these materials is an interesting option to overcome the mentioned disadvantage [5]. The mixture of polymers and RGO allows the nanomaterial dispersion and the possibility of covalent biomolecules immobilization.…”

Section: Introductionmentioning

confidence: 99%

Novel electrochemical sensing platform based on a nanocomposite of PVA/PVP/RGO applied to IgG anti- Toxoplasma gondii antibodies quantitation

Takara

Pereira

Scala-Benuzzi

et al. 2019

Talanta

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This article describes the development of a new electrochemical platform composed by a polymer mixture and graphene oxide (GO). The working electrode of a screen-printed carbon electrode (SPCE) was modified with nanocomposite constituted by poly-vinyl alcohol (PVA), poly-vinylpyrrolidone (PVP) and GO, which was electrochemically reduced to obtain PVA/PVP/RGO/SPCE. The interactions and morphology of the PVA/PVP/GO nanocomposite were investigated by SEM, FTIR and UV-Vis. SEM images indicated an excellent dispersion of the GO sheets in the polymer matrix. Besides, FTIR and visible UV studies revealed strong interactions between polymer mixture and GO sheets. According to electrochemical studies, the new platform increased the electroactive surface area by a factor of 20.46 compared to the unmodified SPCE. Also, the PVA/PVP/RGO/SPCE had a fast electron kinetics transfer process with a value of k s = 9.6 s-1. The modified electrode was applied to the determination of IgG anti-T. gondii antibodies for the serological diagnosis of toxoplasmosis. The IgG anti-T. gondii antibodies quantification showed a detection limit of 0.012 U mL-1 , and the coefficients of variation intra-day and inter-day assays were lower than 4.5 % and 6.2 %, respectively. The electrochemical platform proved to be a sensitive and easily applicable tool applied to the serological diagnosis of toxoplasmosis. Therefore, the developed nanocomposite represents an excellent alternative for the electrochemical biosensor fabrication.

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Section: Introductionmentioning

confidence: 99%

Novel electrochemical sensing platform based on a nanocomposite of PVA/PVP/RGO applied to IgG anti- Toxoplasma gondii antibodies quantitation

Takara

Pereira

Scala-Benuzzi

et al. 2019

Talanta

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“…This condition may be due to the crosslinking effect between CS/SPVA and GA, resulting in high hydrophobicity (with the decrease in ‐OH groups) and lowering the water absorption in the membrane 43 . Mallakpour et al 44 stressed the decline in polymer stability with the addition of GA owing to its dissolution at temperatures above 50°C. We concluded that the CS/SPVA/GA system cannot efficiently be reinforced (ie, polymer stability), resulting in poor thermal stability and complicating the transportation of ions across the membrane at high temperature (reported at 80°C).…”

Section: Resultsmentioning

confidence: 99%

Enhancement in hydrolytic stability and proton conductivity of optimised chitosan/sulfonated poly(vinyl alcohol) composite membrane with inorganic fillers

Wong

Loh

et al. 2021

Intl J of Energy Research

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Summary The study aimed to obtain a chitosan/sulfonated poly(vinyl alcohol) (CS/SPVA) membrane with optimised hydrolytic stability and ion conduction properties by using the Taguchi method. Three factor variables including concentration of glutaraldehyde (GA), crosslinking temperature and crosslinking time were considered. An L18 orthogonal array along with the approach of larger‐the‐better was selected for the optimisation. The highest value in S/N ratio of −19.9947 was observed on sample set 9 without GA involvement, crosslinking temperature of 110°C and time of 90 minutes. The ionic conductivity and water uptake were 8.21 mS/cm and 82.05%, respectively, compared to 7.34 mS/cm and 215.9% of the nonoptimised CS/SPVA15. Further inspection with the incorporation of inorganic fillers (titanium dioxide (TiO2), silicon dioxide (SiO2) and sulfonated graphene oxide (SGO)) was conducted on the optimised CS/SPVA15. The thermomechanical properties of CS/SPVA15 composite membrane was improved with inorganic fillers. In terms of electrochemical properties, ionic conductivity was reduced because of the enhancement in thermal stability. The inorganic filler inhibits the accessible functional groups and increase the ionic resistance of CS/SPVA15 composite membrane. Amongst all samples, CS/SPVA15‐SGO is the most optimised with a minor trade‐off in ionic conductivity (6.82 mS/cm) and IEC (0.8866 mequiv/g) compared with CS/SPVA15, whilst delivering an exceptional hydrolytic stability (76.41%).

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An eco-friendly method for the preparation of poly(N-vinyl-2-pyrrolidone)–poly(vinyl alcohol) blend nanocomposite films containing vitamin B1-modified silica nanoparticles to enhance thermal and wettability properties

Mallakpour

Khani

2019

Polym. Bull.

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Green hybrid nanocomposites from metal oxides, poly(vinyl alcohol) and poly(vinyl pyrrolidone)

Cited by 9 publications

References 63 publications

Novel electrochemical sensing platform based on a nanocomposite of PVA/PVP/RGO applied to IgG anti- Toxoplasma gondii antibodies quantitation

Novel electrochemical sensing platform based on a nanocomposite of PVA/PVP/RGO applied to IgG anti- Toxoplasma gondii antibodies quantitation

Enhancement in hydrolytic stability and proton conductivity of optimised chitosan/sulfonated poly(vinyl alcohol) composite membrane with inorganic fillers

An eco-friendly method for the preparation of poly(N-vinyl-2-pyrrolidone)–poly(vinyl alcohol) blend nanocomposite films containing vitamin B1-modified silica nanoparticles to enhance thermal and wettability properties

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