Porous microspheres of polyaniline, poly(o-toluidine), and poly(m-toluidine) prepared from double emulsions stabilized by toluidine isomers as the single surfactant

Hwang, Jean J.; Soto, Carlos Ernesto Borja; Lafaurie, Daniel; Stephen, Moses; Sarno, David M.

doi:10.1016/j.jcis.2017.11.029

Cited by 9 publications

(4 citation statements)

References 45 publications

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“…The FTIR spectra and XRD patterns of poly(o/m-toluidine) are shown in Figure 2. As shown in Figure 2a, the main characteristic peaks of POT are consistent with the literatures [21,22]. The peak at 3452 cm −1 is attributed to N-H stretching, which suggests the presence of -NH-groups in OT units.…”

Section: Structural Analysis Of Poly(o/m-toluidine) Powderssupporting

confidence: 88%

Fabrication of Poly(o/m-Toluidine)–SiC/Zinc Bilayer Coatings and Evaluation of Their Corrosion Resistances

Liu

Zhang

et al. 2018

Coatings

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The purpose of this research was to study the structure and corrosion resistance of poly(o/m-toluidine)-SiC/zinc (Zn) bilayer coatings. Poly(o/m-toluidine) films, such as poly(o-toluidine) (POT) and poly(m-toluidine) (PMT), were chemically deposited on the surface of composite SiC/Zn coating using the solution evaporation method. The structures of poly(o/m-toluidine) were characterized by various optic techniques and the electrochemical behavior was studied by cyclic voltammetry (CV). The structures and morphologies of the SiC/Zn coating were detected by Fourier transformation infrared spectroscopy (FTIR), X-ray diffraction (XRD), energy dispersive spectrometer (EDS), and scanning electron microscopy (SEM). Thereafter, the corrosion resistances of electrodeposited and bilayer coatings were investigated in 3.5% NaCl solution by electrochemical corrosion techniques and an accelerated immersion test. The results showed that the outer POT film exhibits a lower corrosion behavior with respect to PMT, which significantly reduces the corrosion rate of SiC/Zn coating and prolongs the service life of the zinc matrix. The conclusion demontrates that the stronger adsorptive POT film ensures the formed POT-SiC/Zn bilayer coatings possess a compact and low-defect surface, which facilitates POT film to develop its excellent barrier and passivation properties against corrosion.

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Section: Structural Analysis Of Poly(o/m-toluidine) Powderssupporting

confidence: 88%

Fabrication of Poly(o/m-Toluidine)–SiC/Zinc Bilayer Coatings and Evaluation of Their Corrosion Resistances

Liu

Zhang

et al. 2018

Coatings

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“…The process of adding these acids, known as doping, can be controlled by adding reversible acids or bases to enhance the adsorption properties of POT. [31][32][33][34] However, the long chains have a tendency to aggregate, which decreases the amount of surface area and active sites that are available for adsorption and is a disadvantage of using POT. 35,36 Conversely, polyvinylpyrrolidone (PVP) is a material that causes an increase in pores per unit surface area without causing a change in their size or distribution.…”

Section: Introductionmentioning

confidence: 99%

“…By adding acids like HCl or H 2 SO 4 , the POT can be easily modified and made more effective in attracting dye molecules and nanoparticles. The process of adding these acids, known as doping, can be controlled by adding reversible acids or bases to enhance the adsorption properties of POT 31–34 . However, the long chains have a tendency to aggregate, which decreases the amount of surface area and active sites that are available for adsorption and is a disadvantage of using POT 35,36 .…”

Section: Introductionmentioning

confidence: 99%

Poly(O‐Toluidine)‐polyvinylpyrrolidone copolymer submerged MgFe₂O₄/CS‐OXSWCNTs nanocomposite for removal of acid red dye from aqueous solutions

Katowah,

Sadek

2024

J of Applied Polymer Sci

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In this study, a new hybrid material was created that exhibits excellent adsorption performance and high stability. POT‐PVP/MgF/CS‐OXSWCNTs NCs were synthesized using a three‐step approach. The process involved the chemical polymerization of poly(o‐toluidine)‐polyvinylpyrrolidone (POT‐PVP) with MgFe2O4 nanoparticles (MgF NPs) and chitosan‐oxidized single‐wall carbon nanotubes (CS‐OXSWCNTs). The synthesis process involved the use of an egg white method to synthesize MgF NPs and cross‐linking chitosan with OXSWCNTs using glutaraldehyde (GA) to obtain CS‐OXSWCNTs. The POT‐PVP copolymer was then used to coat MgF NPs and CS‐OXSWCNTs NCs. The successful synthesis of the NCs with strong component interaction was confirmed by several characterization techniques, including X‐ray diffraction spectroscopy (XRD), Fourier‐transform infrared spectroscopy (FTIR), and Raman spectroscopy. Microscopy analysis using scanning electron microscopy (SEM) and transmission electron microscopy (TEM) verified that the POT‐PVP copolymer had properly coated the MgF NPs and CS‐OXSWCNTs NCs. The N2 adsorption–desorption isotherm verified that the specific surface area of NCs had increased with the addition of MgF NPs and CS‐OXSWCNTs NCs. Furthermore, the composite structure greatly improved the thermal stability of POT‐PVP/MgF/CS‐OXSWCNTs NCs. To evaluate how well the nanocomposites (NCs) eliminated pollutants, an artificially produced toxic effluent that contained acid red dye (A.R) was applied. To investigate their impact on dye removal, several parameters were changed, including pH, adsorbent dosage, time, temperature, and ionic strength. The POT‐PVP/MgF/CS‐OXSWCNTs NCs showed a higher removal rate based on a greater surface area, stability, and conducting power than MgF NPs and POT‐PVP. It was found that 25 mg L−1 and 7.5 mg were the optimal dye concentration and adsorbent dosage, respectively. The POT‐PVP/MgF/CS‐OXSWCNTs NCs achieved 99.46% removal efficiency at an acidic pH of 2. The NCs were found to have a maximum dye adsorption capacity of 107.4 mg g−1, and the adsorption process followed the pseudo‐second‐order kinetics. Thermodynamic analyses revealed that the dye adsorption onto POT‐PVP/MgF/CS‐OXSWCNTs NCs was endothermic, implying a spontaneous and physical adsorption mechanism. It can be inferred from these results that POT‐PVP/MgF/CS‐OXSWCNTs NCs are useful for eliminating dye pollutants from water.

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“…It is necessary to increase the pH dependency of PANI, via its derivatives such as poly(-o-toluidine) (PTOL), alkyl-substituted of aniline monomer in the ortho position. PTOL has been probably the most widely studied among the ring-substituted PANI derivatives (Elmansouri et al, 2007;Hwang et al, 2017;Mahudeswaran et al, 2015). Methylsubstituted derivatives of PANI have better solubility and processability than PANI (H. Gul et al, 2018;Saharan et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Conducting Matrices of the Poly(-O-Toluidine, PTOL) Film for Immobilizing Uricase

Hermanto

Ismillayli

Zuryati

et al. 2022

molekul

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Polyaniline, PANI as conducting polymer has been used as enzyme immobilization matrix in biosensors due to its excellent stability and electrochromic effects, conductivity, and redox reversibility. However, at pH above 4, the electron transfer ability and redox activity decrease, henceit is necessary to modify the PANI structure to increase the PANI pH range. In this study, the PANI derivative, the poly(-o-toluidine, PTOL) film was produced for the uricase immobilization matrix. This study aimed to develop a supporting material that maintains catalytic activity uricase with a facile and inexpensive procedure. The PTOL was prepared by using the chemical oxidative polymerization technique with ammonium persulfate (dissolved in 1.0 M HCl) as an oxidizing agent. The FTIR spectra confirmed the success of PTOL formation by the appearance of its characteristic peaks. The UV-Vis spectra indicated that PTOL was in an emeraldine state with a semi-crystalline structure that was shown by its XRD pattern. While, SEM analysis described that the PTOL film was uniform with some granular aggregation in its surface morphology, but there is no holes or porosity were found. The use of PTOL film as a uricase matrix could maintain the uricase activity against the substrate (uric acid, UA) with excellent analytical characteristics. Therefore, PTOL film could be used as conducting matrices for immobilizing enzymes (e.g. biosensors).

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Porous microspheres of polyaniline, poly(o-toluidine), and poly(m-toluidine) prepared from double emulsions stabilized by toluidine isomers as the single surfactant

Cited by 9 publications

References 45 publications

Fabrication of Poly(o/m-Toluidine)–SiC/Zinc Bilayer Coatings and Evaluation of Their Corrosion Resistances

Fabrication of Poly(o/m-Toluidine)–SiC/Zinc Bilayer Coatings and Evaluation of Their Corrosion Resistances

Poly(O‐Toluidine)‐polyvinylpyrrolidone copolymer submerged MgFe₂O₄/CS‐OXSWCNTs nanocomposite for removal of acid red dye from aqueous solutions

Conducting Matrices of the Poly(-O-Toluidine, PTOL) Film for Immobilizing Uricase

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Porous microspheres of polyaniline, poly(o-toluidine), and poly(m-toluidine) prepared from double emulsions stabilized by toluidine isomers as the single surfactant

Cited by 9 publications

References 45 publications

Fabrication of Poly(o/m-Toluidine)–SiC/Zinc Bilayer Coatings and Evaluation of Their Corrosion Resistances

Fabrication of Poly(o/m-Toluidine)–SiC/Zinc Bilayer Coatings and Evaluation of Their Corrosion Resistances

Poly(O‐Toluidine)‐polyvinylpyrrolidone copolymer submerged MgFe2O4/CS‐OXSWCNTs nanocomposite for removal of acid red dye from aqueous solutions

Conducting Matrices of the Poly(-O-Toluidine, PTOL) Film for Immobilizing Uricase

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Poly(O‐Toluidine)‐polyvinylpyrrolidone copolymer submerged MgFe₂O₄/CS‐OXSWCNTs nanocomposite for removal of acid red dye from aqueous solutions