Evaluation of modified silica nanoparticles in carboxylated nitrile rubber nanocomposites

Sala, Renata L.; Arantes, Tatiane M.; Longo, Elson; Leite, Edson Roberto; Paranhos, Caio Márcio; Camargo, Emerson R.

doi:10.1016/j.colsurfa.2014.08.012

Cited by 17 publications

(14 citation statements)

References 50 publications

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“…The SDS formed the tail and head structure with the heads as negatively charged ions. The SDS ions connected and formed spherical micelles, which then encapsulated the SiO 2 particles . This process controls the local dispersion of SiO 2 particles through electrostatic force interaction between the outer micelles, which might then reduce the silica agglomeration.…”

Section: Methodsmentioning

confidence: 99%

“…Stirring the mixture will further randomly distribute the SiO 2 particles within the matrix (this mechanism can be seen in Figure ). The mechanism responsible for the intermolecular arrangements of SDS was the initiation of the functional groups of the polymer, especially the carboxylates . Previous studies have shown that SDS has been successfully used to enhance the dispersion of silica in different polymer matrices.…”

Section: Methodsmentioning

confidence: 99%

“…The mechanism responsible for the intermolecular arrangements of SDS was the initiation of the functional groups of the polymer, especially the carboxylates . Previous studies have shown that SDS has been successfully used to enhance the dispersion of silica in different polymer matrices. SDS can initiate better adsorption of the sulfate polar groups on the surface of the particles by electrostatic interaction.…”

Section: Methodsmentioning

confidence: 99%

See 2 more Smart Citations

Dynamic tensile and shear storage moduli of PEG/silica‐polymorph composites

Fauziyah

Hilmi

Fadly

et al. 2018

J of Applied Polymer Sci

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The effect of silica polymorphs on the thermomechanical properties of 0, 5, 10, and 20 wt % silica particles-reinforced-based poly(ethylene glycol) (PEG) composites have been studied as a function of temperature using dynamic mechanical analysis (DMA). The silica polymorphs exhibited quartz (Q), cristobalite (C), and amorphous (A) phases, which were obtained by processing natural silica sand. The DMA thermomechanical properties were determined in tensile (E) and shear (G) modes. The maximum storage moduli (E 0 and G 0 ) were achieved by samples with 20 wt % silica for all type of fillers. These values increased approximately 12 times for PEG/Q, 10 times for PEG/A, and 11 times for PEG/C composites compared to the pure PEG. Furthermore, the Poisson's ratio values of the composites were filler phase dependent, that is, 0.39-0.47 for PEG/Q, 0.15-0.18 for PEG/A, and somewhat anomalous for PEG/C composites.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Dynamic tensile and shear storage moduli of PEG/silica‐polymorph composites

Fauziyah

Hilmi

Fadly

et al. 2018

J of Applied Polymer Sci

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“…This is mainly attributed to the effect of adding SDS as a dispersant in the synthesis of the composites 21,22 . The mechanism of the homogenization of the filler, which is n‐ZrO 2 in this case, as a result of SDS addition, would be similar to those in other systems 23,24 where electric repulsion of the charged SDS is responsible. Satisfactory mixing caused the n‐ZrO 2 filler to distribute more evenly in the polymer matrix.…”

Section: Resultsmentioning

confidence: 72%

Zirconia‐dispersedpolyethylene glycol composites with a lowtemperature‐degradationrate

Hilmi

Muwwaqor

Fauziyah

et al. 2020

J of Applied Polymer Sci

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The effect of tetragonal‐zirconia nanoparticle inclusion on the temperature‐dependent storage modulus, or the temperature‐degradation rate, of polyethylene glycol (PEG)‐based composites was investigated using shear‐mode dynamic mechanical analysis (DMA) at temperatures ranging from room temperature up to 75°C. We carried out further investigations in the rubbery area in terms of the characteristic of the degradation rate with temperature and compared it with silica‐quartz‐filled PEG composites, which exhibited a potential as phase‐change materials (PCMs). The investigation began by plotting the shear storage modulus (G′) of the composites and observing the slopes of the curves in the range of the rubbery area, which were assumed to follow a straight‐line equation. Then, we completed the investigation by developing and introducing a temperature‐dependent storage modulus model in the rubbery area for describing the storage modulus of such filler‐dispersed PEG/inorganic composites, to yield the degradation rates of the composites. The new model includes parameters k1 and C that are associated with the degradation rate and the amount of a filler, respectively. The model shows a satisfactory agreement with the experimental data of G′ in the rubbery area, being parameter k1 is associated with a linear degradation rate.

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“…The preparation of SiO 2 nanoparticles was following the process demonstrated by Sala et al: 25 mL of ethanol, 35 mL of distilled water, and 7.4 mL of ammonia hydroxide were added successively into a 200‐mL glass beaker and homogenized to form solution A; 10.4 g of TEOS and 25 mL of ethanol were blended in a 100‐ml glass beaker to form solution B. Solution B was quickly added into solution A and stirred at 500 rpm for 12 hours.…”

Section: Methodsmentioning

confidence: 99%

Effect of Pickering emulsion on the mechanical performances and fracture toughness of epoxy composites

2019

Polymers for Advanced Techs

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The improvement of mechanical properties and toughness of nanoparticles for epoxy composites was mostly dependent on the disperse state of nanoparticles in epoxy matrices. When the content of nanoparticles was higher than a threshold value, it was easy to aggregate and then affect the improvement effect. Pickering emulsion was prepared using SiO2 nanoparticles as emulsifier and functional monomer as oil phase. The influence of Pickering emulsion on the curing process was investigated. The effect of Pickering emulsion on the mechanical properties, toughness, and glass transition temperature (Tg) was studied. Impact and tensile fracture surface were observed by scanning electron microscopy (SEM). Results from differential scanning calorimeter (DSC), tensile, impact, and fracture toughness tests are provided. The results indicated that the introduction of Pickering emulsion can eliminate the residual stress and accelerate curing reaction. Epoxy composites were capable of increasing tensile strength by up to 29.9%, impact strength of three‐fold, fracture toughness of 35%, and Tg of 20.7°C in comparison with the reference sample. SEM images showed that SiO2 nanoparticles exhibit a good dispersion in epoxy matrix. The increases in mechanical properties, toughness, and Tg of epoxy composites were attributed to the “Second Phase Toughness” mechanism.

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Evaluation of modified silica nanoparticles in carboxylated nitrile rubber nanocomposites

Cited by 17 publications

References 50 publications

Dynamic tensile and shear storage moduli of PEG/silica‐polymorph composites

Dynamic tensile and shear storage moduli of PEG/silica‐polymorph composites

Zirconia‐dispersedpolyethylene glycol composites with a lowtemperature‐degradationrate

Effect of Pickering emulsion on the mechanical performances and fracture toughness of epoxy composites

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