A spontaneous interfacial process to produce silica Janus nanosheets as perfect emulsifiers in pickering emulsions

Zamanian‐Fard, Alireza; Sharifzadeh, Esmail; Rajabi, Laleh

doi:10.1080/01932691.2020.1848575

Cited by 9 publications

(4 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[3] For instance, nanoparticles can increase the mechanical/thermal properties of polymers (e.g., tensile modulus, yield strength, thermal conduction, and so forth. [4] ), stability of oil droplets in an O/W Pickering emulsion and compatibility of polymer phases in a polymer blend, [5][6][7] performance of specific membranes, [8][9][10] hydrophobicity/hydrophilicity of surfaces, [11] efficiency of drug-delivery systems, [12] and so forth. Though, the impact of nanoparticles on a system directly depends on their mutual compatibility and aggregation/agglomeration degree.…”

Section: Introductionmentioning

confidence: 99%

An energy‐based approach to study the aggregation/agglomeration phenomenon in polymer nanocomposites: Dispersion force against inter‐particle cohesion

Sharifzadeh

Maleki

2022

Polymer Composites

Self Cite

View full text Add to dashboard Cite

In this study, a novel method was proposed to predict the size and content of the nanoparticle aggregates/agglomerates in polymer nanocomposites based on the characteristics of the mixer, cohesion energy between nanoparticles and their content in the system. The internal energy equilibrium was evaluated by calculating the induced mixing energy by the mixer, aggregation, and agglomeration energies. An analytical model was designed to predict the tensile modulus of the system based on dispersion content and size of the aggregates/agglomerates. In addition, the tensile modulus of the aggregates/agglomerates was defined by developing Wacke's empirical equation. Two sets of PP and PA6 nanocomposite samples, containing 1–3 vol% of silica nanoparticles, were prepared and tested to verify the theoretical results. The applied nanoparticles were subjected to surface modification processes to maximize their compatibility with their surrounding polymer matrix. Different tests, including FE‐SEM, contact‐angle and tensile, were used to determine the mechanical/physical characteristics of the samples. The predicted results for the size of the aggregated/agglomerated domains were very close to those defined using FE‐SEM tests. On the other hand, the predicted tensile moduli based on the content, size and mechanical characteristics of the aggregated/agglomerated domains were acceptably accurate considering the tensile test results.

show abstract

Section: Introductionmentioning

confidence: 99%

An energy‐based approach to study the aggregation/agglomeration phenomenon in polymer nanocomposites: Dispersion force against inter‐particle cohesion

Sharifzadeh

Maleki

2022

Polymer Composites

Self Cite

View full text Add to dashboard Cite

show abstract

“…To ensure the success of the surface modification process, the FTIR results of the PSN and AMS nanoparticles were compared (Figure 3). As it is clear, a distinguished peak for both nanoparticle types is located at 1100 cm −1 related to SiOSi bonds 35,36 . CH peaks are specified at 1570 and 2929 cm −1 37 .…”

Section: Resultsmentioning

confidence: 90%

“…As it is clear, a distinguished peak for both nanoparticle types is located at 1100 cm À1 related to Si O Si bonds. 35,36 C H peaks are specified at 1570 and 2929 cm À1 . 37 and wavenumbers 810 and 2870 cm À1 belong to O H and CH 2 peaks.…”

Section: Thermal Measurementsmentioning

confidence: 99%

Isothermal crystallization kinetics of pure and surface‐modified silica/high‐density polyethylene nanocomposites

Hojatzadeh,

Rahimpour,

Sharifzadeh

2023

Polymer Composites

Self Cite

View full text Add to dashboard Cite

The isothermal crystallization kinetics of high‐density polyethylene (HDPE) nanocomposites containing 0, 0.5, 0.75, and 2 wt% of pure and surface‐modified silica were evaluated at three crystallization temperatures (Tc) of 120°C, 121°C, and 122°C using differential scanning calorimetry (DSC) and applying Avrami, Tobin, and Malkin equations. According to Hoffman‐Weeks theory, the values of the equilibrium melting point () of the nanocomposites decreased with increasing nanoparticle content and were higher in the samples containing AMS nanoparticles, owing to the larger crystal. The results of all three models offered the same trend according to which the change in the crystallization temperature influenced the nucleation mechanism and the crystallization rate. It was found that a greater number of spherulites can be formed via increasing Tc from 120°C to 122°C which also decreased the crystallization rate of the nanocomposites. At the crystallization temperature of 122°C, the lowest melting temperature was recorded for the samples, attributed to the formation of more crystals with a lower thickness. Moreover, in HDPE/AMS nanocomposites, the crystallization rate was higher than that of HDPE/PSN, ascribed to the positive effect of surface modification on nanoparticles.Highlights Increased polymer/particle compatibility and isothermal crystallization. Evaluating the nucleation and crystallization using different models. The impact of isothermal crystallization temperature on crystallinity. Variation of equilibrium melting point with the nanoparticle content.

show abstract

“…[ 8‐11 ] For instance, the characteristics of the polymer/particle interphase, due to the attachment of the polymer chains to the superficial active sites on nanoparticles, can be somewhat controlled via well‐engineered surface modification processes. [ 10,12‐15 ]…”

Section: Introductionmentioning

confidence: 99%

Temperature‐/Frequency‐dependent complex viscosity and tensile modulus of polymer nanocomposites from the glassy state to the melting point

Sharifzadeh

Mohammadi

2021

Polymer Engineering & Sci

Self Cite

View full text Add to dashboard Cite

In this study, the temperature‐/frequency‐dependent viscosity and tensile modulus of polymer nanocomposites were evaluated using the combination of developed Arrhenius's equation and percolation theory. To involve the drastic effects of the polymer/particles interphase region and the aggregation/agglomeration of nanoparticles in the model, the Nielsen–Lewis model was developed and used to interpret the related parameters from heat conduction test results. The value of different state‐to‐state conversion degrees was calculated using the developed percolation theory whose validity was evaluated via comparative studies with theoretical results obtained from developed Arrhenius's equations. The simultaneous effects of the nanoparticles content and temperature/frequency on the viscosity and tensile modulus were also studied, which defined the role of some important phenomena such as the breakdown of the nanoparticle clusters, the increased cluster stability by polar surface modifiers, the increased thermal conductivity of the nanocomposite due to the presence of nanoparticles, etc. Different PA nanocomposites samples, containing 1–4 vol% of spherical silica nanoparticles, were prepared and subject to dynamical mechanical analysis, by temperature ramps and frequency sweep, and the results were used to evaluate the accuracy of the model. The surface of the nanoparticles was chemically modified with (3‐aminopropyl)triethoxysilane to ensure their perfect compatibility with PA phase.

show abstract

A spontaneous interfacial process to produce silica Janus nanosheets as perfect emulsifiers in pickering emulsions

Cited by 9 publications

References 43 publications

An energy‐based approach to study the aggregation/agglomeration phenomenon in polymer nanocomposites: Dispersion force against inter‐particle cohesion

An energy‐based approach to study the aggregation/agglomeration phenomenon in polymer nanocomposites: Dispersion force against inter‐particle cohesion

Isothermal crystallization kinetics of pure and surface‐modified silica/high‐density polyethylene nanocomposites

Temperature‐/Frequency‐dependent complex viscosity and tensile modulus of polymer nanocomposites from the glassy state to the melting point

Contact Info

Product

Resources

About