Synergistic effect of microwave assisted devulcanization of waste NBR rubber and using superhydrophobic/superoleophilic silica nanoparticles on oil-water separation

Ghamarpoor, Reza; Jamshidi, Masoud

doi:10.1016/j.aej.2023.02.002

Cited by 33 publications

(11 citation statements)

References 61 publications

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“…It was found that the surface modification of nanoparticles have not influenced their crystalline phase. The size of the crystals was also calculated according to the Scherrer equation 48 , 50 , 51 that were 17.01 and 16.97 nm for raw and silanized silica. This result illustrates negligible reduction in the size of crystals after modification with GPTMS.…”

Section: Resultsmentioning

confidence: 99%

“…It was seen that the tensile properties increased. It was attributed to the better dispersion of the silanized silica fume in the epoxy matrix due to steric stabilization of the nanoparticles that prepared by hindrance of the grafted silane groups 47 , 48 . The silanized silica fume showed no effects on the flexural properties but caused considerably increment in the strength and modulus properties of epoxy sample.…”

Section: Resultsmentioning

confidence: 99%

“…Firstly, the optimal amount of silane required to modify the surface of nanoparticles was calculated by the following stoichiometric relationship 45 – 48 : where m GPTMS and M GPTMS are the mass of the GPTMS (gr) and the molecular mass of the GPTMS, respectively. N A and n OH are Avogadro numbers and the number of hydroxyl groups, respectively.…”

Section: Methodsmentioning

confidence: 99%

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Achieving outstanding mechanical/bonding performances by epoxy nanocomposite as concrete–steel rebar adhesive using silane modification of nano SiO2

Ghamarpoor

Jamshidi

Mohammadpour

2023

Sci Rep

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Anchoring steel rebar in concrete structures is a common method in the building and construction industry. This research focuses on improving the mechanical/bonding properties of the prepared epoxy nanocomposite adhesive using surface treatment of SiO2 nano fillers by glycidoxypropyltrimethoxysilane (GPTMS). For this purpose, the nano silica particles were silanized via a facile sol–gel method at silane concentrations of 1, 5, 10 and 20X (i.e. X is stoichiometric silane concentration). The nanoparticles were characterized carefully by FTIR, TGA, XRD and XPS techniques. It was found that the highest GPTMS grafting ratio was obtained at silane concentration of 10X. The pure and silanized nanoparticles were added to a two-pack epoxy resin and were compared for tensile and compressive properties. It was found that surface modification of nano silica caused improvement in the strength, modulus, compressive strength and compressive modulus by 56, 81, 200 and 66% compared to the pristine epoxy adhesive and also 70, 20, 17 and 21% compared to the pure nano silica containing adhesive. It also caused 40 and 25% improvement in the pullout strength, 33 and 18% enhancement in the pullout displacement and 130 and 50% in adhesion energy compared to the pristine and raw silica-containing adhesives, respectively.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Achieving outstanding mechanical/bonding performances by epoxy nanocomposite as concrete–steel rebar adhesive using silane modification of nano SiO2

Ghamarpoor

Jamshidi

Mohammadpour

2023

Sci Rep

Self Cite

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“…Such particles include CNTs and MWCNTs [ 6 , 7 ], graphene and graphene oxide [ 8 , 9 ], nanodiamonds [ 10 , 11 ], potassium polytitanates [ 12 , 13 , 14 ], MXene [ 15 , 16 ], BN particles [ 17 , 18 ], etc. The success of using various nano-sized particles to increase strength and thermal conductivity, change dielectric properties, use as sorbents [ 19 , 20 , 21 ], as well as to create fireproof materials is confirmed by a large number of studies. The work [ 8 ] shows a comparison of the influence of graphene-nanoplateles (Gr) and CNTs on the strength and thermal stability of the resulting epoxy composites.…”

Section: Introductionmentioning

confidence: 99%

Investigating the Structure and Properties of Epoxy Nanocomposites Containing Nanodiamonds Modified with Aminoacetic Acid

Mostovoy,

Bekeshev,

Shcherbakov

et al. 2024

Polymers

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This paper presents a study on the prospects of functionalizing nanodiamonds (NDs) with aminoacetic acid to obtain high-strength composites based on an epoxy matrix. The impact of the functionalization of the ND surface with aminoacetic acid in various concentrations on the properties of the epoxy composite was assessed. The success of grafting amine onto the ND surface was confirmed by X-ray phase analysis and IR spectroscopy. The results show a significant decrease in the average size of ND particles, from 400 nm for the pristine ones to 35 nm, and the contact angle, from 27° to 22°, with an increase in the specific surface area after treatment with a 5% solution of aminoacetic acid. Reducing the average size of NDs allows them to be better distributed throughout the epoxy matrix, which, as a result of the formation of chemical interaction at the matrix–nanofiller phase interface, can significantly increase the strength of the obtained composite. The addition of NDs treated with aminoacetic acid ensures an increase in the deformation-strength properties of epoxy composites by 19–23% relative to an epoxy composite containing the pristine NDs. Moreover, the presence of functionalized NDs significantly influences the structure and thermal stability of the epoxy nanocomposite.

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“…This exibility broadens its potential applications, encompassing the utilization of nanocomposite silica/ recycled NBR rubber and the facilitation of superhydrophobic attributes. [6][7][8] Furthermore, this characteristic lends itself to developing nano-silica epoxy adhesive, which enhances the adhesion between steel and concrete. 9 Rubber composites can be produced using a dry process and a wet process.…”

Section: Introductionmentioning

confidence: 99%

CFD simulation of silica dispersion/natural rubber latex mixing for high silica content rubber composite production

Phumnok,

Saetiao,

Bumphenkiattikul

et al. 2024

RSC Adv.

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Synergistic effect of microwave assisted devulcanization of waste NBR rubber and using superhydrophobic/superoleophilic silica nanoparticles on oil-water separation

Cited by 33 publications

References 61 publications

Achieving outstanding mechanical/bonding performances by epoxy nanocomposite as concrete–steel rebar adhesive using silane modification of nano SiO2

Achieving outstanding mechanical/bonding performances by epoxy nanocomposite as concrete–steel rebar adhesive using silane modification of nano SiO2

Investigating the Structure and Properties of Epoxy Nanocomposites Containing Nanodiamonds Modified with Aminoacetic Acid

CFD simulation of silica dispersion/natural rubber latex mixing for high silica content rubber composite production

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