Free-radical graft polymerization of acrylonitrile on gamma irradiated graphene oxide: Synthesis and characterization

Nasir, Abdul; Raza, Asif; Tahir, Muhammad; Yasin, Tariq

doi:10.1016/j.matchemphys.2020.122807

Cited by 23 publications

(20 citation statements)

References 39 publications

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“…The obtained product was vacuum dried at 50 C till constant weight and labeled as MS-g-PANI. The grafting yield (%) and grafting efficiency (%) were calculated using the following equations 11,15 :…”

Section: Emulsion Graft Polymerizationmentioning

confidence: 99%

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Synthesis and EMI shielding studies of polyaniline grafted conducting nanohybrid

Raza

Nasir

Tahir

et al. 2020

J of Applied Polymer Sci

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Polyaniline (PANI) grafted conducting nanohybrids are successfully synthesized by emulsion graft polymerization. Maximum grafting of 644% is obtained on sepiolite at optimized concentrations and reaction conditions. The Fourier transform infrared (FT‐IR) spectra of sepiolite grafted polyaniline (MS‐g‐PANI) nanohybrid revealed the presence of stretching vibrations of C=C bonds of polyaniline at 1580 and 1490 cm−1 along with the characteristic peaks of sepiolite. Increased thermal stability of the nanohybrid is observed with the increase in polyaniline grafting. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) are used to study the structural changes caused by grafting. A progressive increase in electrical conductivity is observed with the increase in grafting yield. Maximum electrical conductivity of 0.427 Scm−1 is observed in the nanohybrid having 644% grafting. 24.2 dB (>99% attenuation) EMI shielding effectiveness has been exhibited by the developed nanohybrids in X‐band frequency range.

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Section: Emulsion Graft Polymerizationmentioning

confidence: 99%

“…Grafting technique is used to transform the surface properties of a base material according to target applications. [10][11][12] This technique has been successfully applied in the synthesis of nanohybrids. 13 Variety of monomers can be grafted on clays via surface initiated polymerization.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and EMI shielding studies of polyaniline grafted conducting nanohybrid

Raza

Nasir

Tahir

et al. 2020

J of Applied Polymer Sci

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“…Functional copolymers made by radiation-induced graft copolymerization (RIGC) of polar or nonpolar monomers onto existing polymers are a desirable class of separation materials because they have improved properties from the addition of hydrophilic ionic groups that significantly alter the backbone polymers. Additionally, the advantages of radiation-grafted copolymers include (i) easy fabrication; (ii) access to a variety of radiation processing sources; and (iii) the capacity to combine two incompatible characteristics, namely hydrophilicity and hydrophobicity [ 13 , 14 , 15 ].…”

Section: Introductionmentioning

confidence: 99%

Radiation-Grafting on Polypropylene Copolymer Membranes for Using in Cadmium Adsorption

Khedr

2023

Polymers

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Graft copolymerization has been a popular technique in recent years for adding different functional groups to polymers. In our research, polypropylene (PP) films are grafted with acrylonitrile (An) and acrylic acid (AAc) monomers to make them hydrophilic while retaining their mechanical qualities. Gamma radiation is used in this approach to establish active spots on an inert polymer that are appropriate for adding monomers radicals to form grafts, a procedure that is extremely difficult to perform using normal chemical processes. The graft parameters are investigated in order to acquire the highest percentage of graft. FTIR (Fourier transform infrared spectroscopy) spectra are used to analyze the grafting of AAc and An. SEM (scanning electron microscopy) and XRD (X-ray diffraction) micrographs are used to validate them. The specimens’ tensile strength and hardness are measured and contrasted with blank PP films. Measurements are made of the effects of grafting on the tensile strength and elongation of the films, and a crucial grafting degree is established in order to preserve these properties. Water uptake is measured to adapt the copolymer to water treatment, and thermal behavior TGA (thermal gravimetric analysis) and DSC (diffraction scanning calorimeter) of the produced copolymer were performed. The elimination of cadmium was verified by an atomic absorption spectrophotometer (AAS) under different conditions of pH, time, and degree of grafting.

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“…Graphene, a superstar in the materials field for quite some time, provides potential applications in hydrogen storage, supercapacitors, chemical and biosensors, catalysis, and so on. [1] Also graphene modification or functionalization provides derivatives that have been investigated at length for an even wider range of applications, [2] including photocatalysis [3][4][5] and comprehensive reviews [3,6,7] and applications focus on environmental remediation, [8][9][10] selective organic transformation, [11] hydrogen evolution, [12,13] CO 2 photoreduction, [14] sensing. [15][16][17][18] Moreover, other research directions include bioapplications (therapeutic delivery, biological imaging, cancer sensing), [19][20][21] various energy storage devices (such as fuel cells, microbial fuel cells, supercapacitors, electrochemical detection, dye synthesized solar cells), [22][23][24] or photoelectrochemical applications.…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic Synthesis of Oxidized Graphite Enabled by Grey TiO₂ and Direct Formation of a Visible‐Light‐Active Titania/Graphene Oxide Nanocomposite

et al. 2022

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Herein we report a one-step, low cost, photocatalytic method for the synthesis of graphene oxide (GO) from commercial graphite using grey TiO 2 as a photocatalyst. GO formation is achieved by UV-illumination of a slurry of well-dispersed grey TiO 2 and commercial graphite. Light-induced valence-band holes from grey TiO 2 then lead to an oxidation and exfoliation of graphite, resulting in the formation of visible-light-active GO. An optimal level of graphite oxidation can be established by controlling the UV illumination time. Moreover, the resulting GO-decorated TiO 2 is directly active as a visible-light-active photocatalyst that can, for example, be used for pollution degradation.

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Free-radical graft polymerization of acrylonitrile on gamma irradiated graphene oxide: Synthesis and characterization

Cited by 23 publications

References 39 publications

Synthesis and EMI shielding studies of polyaniline grafted conducting nanohybrid

Synthesis and EMI shielding studies of polyaniline grafted conducting nanohybrid

Radiation-Grafting on Polypropylene Copolymer Membranes for Using in Cadmium Adsorption

Photocatalytic Synthesis of Oxidized Graphite Enabled by Grey TiO₂ and Direct Formation of a Visible‐Light‐Active Titania/Graphene Oxide Nanocomposite

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Free-radical graft polymerization of acrylonitrile on gamma irradiated graphene oxide: Synthesis and characterization

Cited by 23 publications

References 39 publications

Synthesis and EMI shielding studies of polyaniline grafted conducting nanohybrid

Synthesis and EMI shielding studies of polyaniline grafted conducting nanohybrid

Radiation-Grafting on Polypropylene Copolymer Membranes for Using in Cadmium Adsorption

Photocatalytic Synthesis of Oxidized Graphite Enabled by Grey TiO2 and Direct Formation of a Visible‐Light‐Active Titania/Graphene Oxide Nanocomposite

Contact Info

Product

Resources

About

Photocatalytic Synthesis of Oxidized Graphite Enabled by Grey TiO₂ and Direct Formation of a Visible‐Light‐Active Titania/Graphene Oxide Nanocomposite