Nanodiamonds as a state-of-the-art material for enhancing the gamma radiation resistance properties of polymeric membranes

Bedar, Amita; Goswami, Nitesh; Singha, Amit K.; Kumar, Virendra; Debnath, A.K.; Sen, Debasis; Aswal, Vinod K.; Kumar, Sanjay; Dutta, Dhanadeep; Keshavkumar, Biju; Ghodke, Sharwari; Jain, Ratnesh; Singh, Beena G.; Tewari, Pradeep K.; Bindal, R.C.; Kar, Soumitra

doi:10.1039/c9na00372j

Cited by 10 publications

(4 citation statements)

References 63 publications

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“…withstood doses an order of magnitude higher (1000 kGy) [87], as the diamond particles adsorbed chemically aggressive products of water radiolysis [88]. The prospects for using diamonds to increase the thermal and radiation resistance and service life of filtration polymer membranes were discussed in review [89], in connection with the problems of modifying the surface of diamonds. Nanodiamond particles were silanized [90] to be incorporated into Psf membranes (up to 1 wt.…”

Section: Micellar Models For Membranesmentioning

confidence: 99%

Electrochemical Properties and Structure of Membranes from Perfluorinated Copolymers Modified with Nanodiamonds

Lebedev,

Kulvelis,

Shvidchenko

et al. 2023

Membranes

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In this study, we aimed to design and research proton-conducting membranes based on Aquivion®-type material that had been modified with detonation nanodiamonds (particle size 4–5 nm, 0.25–5.0 wt. %). These nanodiamonds carried different functional groups (H, OH, COOH, F) that provided the hydrophilicity of the diamond surface with positive or negative potential, or that strengthened the hydrophobicity of the diamonds. These variations in diamond properties allowed us to find ways to improve the composite structure so as to achieve better ion conductivity. For this purpose, we prepared three series of membrane films by first casting solutions of perfluorinated Aquivion®-type copolymers with short side chains mixed with diamonds dispersed on solid substrates. Then, we removed the solvent and the membranes were structurally stabilized during thermal treatment and transformed into their final form with –SO3H ionic groups. We found that the diamonds with a hydrogen-saturated surface, with a positive charge in aqueous media, contributed to the increase in proton conductivity of membranes to a greater rate. Meanwhile, a more developed conducting diamond-copolymer interface was formed due to electrostatic attraction to the sulfonic acid groups of the copolymer than in the case of diamonds grafted with negatively charged carboxyls, similar to sulfonic groups of the copolymer. The modification of membranes with fluorinated diamonds led to a 5-fold decrease in the conductivity of the composite, even when only a fraction of diamonds of 1 wt. % were used, which was explained by the disruption in the connectivity of ion channels during the interaction of such diamonds mainly with fluorocarbon chains of the copolymer. We discussed the specifics of the mechanism of conductivity in composites with various diamonds in connection with structural data obtained in neutron scattering experiments on dry membranes, as well as ideas about the formation of cylindrical micelles with central ion channels and shells composed of hydrophobic copolymer chains. Finally, the characteristics of the network of ion channels in the composites were found depending on the type and amount of introduced diamonds, and correlations between the structure and conductivity of the membranes were established.

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Section: Micellar Models For Membranesmentioning

confidence: 99%

Electrochemical Properties and Structure of Membranes from Perfluorinated Copolymers Modified with Nanodiamonds

Lebedev,

Kulvelis,

Shvidchenko

et al. 2023

Membranes

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“…The mixture of CA-PEG with the crosslinking agent MBA in the irradiated CA-MBA-PEG-10 kGy membrane allows the remaining PEG not to bind to CA so that agglomeration occurs on the membrane surface (Bedar et al, 2020). In this case, the CA and MBA molecules have pre-formed stable crosslinks.…”

Section: Membrane Morphologymentioning

confidence: 99%

Gamma Irradiation of Cellulose Acetate-Polyethylene Glycol 400 Composite Membrane and Its Performance Test for Gas Separation

Febriasari¹,

Suhartini²,

Yunus³

et al. 2021

IJTech

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Gas separation processes through membrane permeation have attracted the attention of researchers recently due to their promising applications. In this study, we modified the cellulose acetate (CA) membrane to improve the membrane performance of CO2/CH4 gas separation. The CA membrane was modified by adding polyethylene glycol (PEG) 400 as the carrier and N, N'methylenebisacrylamide (MBA) as the cross-linking agent. Gamma-ray from cobalt 60 was used as a reaction initiator with variation in irradiation doses. The membrane characterization tests were conducted using scanning electron micrograph (SEM), Fourier transforms infrared (FTIR), and instron tensile strength tester. The permeability and selectivity of the membranes were tested against the single gases CO2 and CH4. The SEM analysis showed the morphology change in the membrane surface by gamma irradiation and a crosslinking agent. The spectra of FTIR showed a change in peak intensity on several polymer functional groups in the presence of gamma-ray irradiation. The tensile strength test showed that membranes with MBA have a higher mechanical strength than those without MBA. Based on the membrane permeability and selectivity tests, CO2 gas permeability was affected by pressure. The ideal selectivity of CO2/CH4 shows that the irradiated membrane has a higher selectivity than that of the non-irradiated membrane.

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“…Considerable scientific attention has been directed to NDs owing to their special shape and chemical, biological, mechanical, and optical properties. The main advantages of ND particles are seen in their excellent strength, stiffness, good thermal conductivity and electrical resistivity, optical properties and fluorescence, low coefficient of friction, chemical stability, and resistance to harsh environments, and biocompatibility [ 32 , 33 , 34 , 35 , 36 , 37 ]. The small and uniform size of elementary ND particles, with an almost spherical structure, is considered a great benefit because their distribution (intermixing) in the material is better compared to, for example, carbon nanotubes and graphene.…”

Section: Introductionmentioning

confidence: 99%

Study on Structure, Thermal Behavior, and Viscoelastic Properties of Nanodiamond-Reinforced Poly (vinyl alcohol) Nanocomposites

et al. 2021

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In this work, advanced polymer nanocomposites comprising of polyvinyl alcohol (PVA) and nanodiamonds (NDs) were developed using a single-step solution-casting method. The properties of the prepared PVA/NDs nanocomposites were investigated using Raman spectroscopy, small- and wide-angle X-ray scattering (SAXS/WAXS), scanning electron microscopy (SEM), transmission electron microscopy (TEM), thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), and dynamic mechanical analysis (DMA). It was revealed that the tensile strength improved dramatically with increasing ND content in the PVA matrix, suggesting a strong interaction between the NDs and the PVA. SEM, TEM, and SAXS showed that NDs were present in the form of agglomerates with an average size of ~60 nm with primary particles of diameter ~5 nm. These results showed that NDs could act as a good nanofiller for PVA in terms of improving its stability and mechanical properties.

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Nanodiamonds as a state-of-the-art material for enhancing the gamma radiation resistance properties of polymeric membranes

Abstract: Radiation effects on polysulfone membranes without and with incorporating nanodiamonds into the polysulfone matrix.

Cited by 10 publications

References 63 publications

Electrochemical Properties and Structure of Membranes from Perfluorinated Copolymers Modified with Nanodiamonds

Electrochemical Properties and Structure of Membranes from Perfluorinated Copolymers Modified with Nanodiamonds

Gamma Irradiation of Cellulose Acetate-Polyethylene Glycol 400 Composite Membrane and Its Performance Test for Gas Separation

Study on Structure, Thermal Behavior, and Viscoelastic Properties of Nanodiamond-Reinforced Poly (vinyl alcohol) Nanocomposites

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