Effects of different surfactants and physical properties on the coalescence of dimethyl disulfide drops with mother phase at the interface of sodium hydroxide aqueous solutions

Kasmaee, M.; Varaminian, Farshad; Khadiv‐Parsi, Parissa; Saien, Javad

doi:10.1016/j.molliq.2018.04.025

Cited by 12 publications

(9 citation statements)

References 15 publications

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“…Coalescence is a phenomenon by which several individual bodies merge to form an integrated mass [94,95]. Various mechanisms, such as capillary-induced flow, mass diffusion, or crystallization, could occur in order to facilitate it.…”

Section: Influence Of Heat Transfer On Rheological Characteristicsmentioning

confidence: 99%

In-Process Monitoring of Temperature Evolution during Fused Filament Fabrication: A Journey from Numerical to Experimental Approaches

Vanaei

Shirinbayan

Deligant

et al. 2021

Thermo

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Fused filament fabrication (FFF), an additive manufacturing technique, unlocks alternative possibilities for the production of complex geometries. In this process, the layer-by-layer deposition mechanism and several heat sources make it a thermally driven process. As heat transfer plays a particular role and determines the temperature history of the merging filaments, the in-process monitoring of the temperature profile guarantees the optimization purposes and thus the improvement of interlayer adhesion. In this review, we document the role of heat transfer in bond formation. In addition, efforts have been carried out to evaluate the correlation of FFF parameters and heat transfer and their effect on part quality. The main objective of this review paper is to provide a comprehensive study on the in-process monitoring of the filament’s temperature profile by presenting and contributing a comparison through the literature.

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Section: Influence Of Heat Transfer On Rheological Characteristicsmentioning

confidence: 99%

In-Process Monitoring of Temperature Evolution during Fused Filament Fabrication: A Journey from Numerical to Experimental Approaches

Vanaei

Shirinbayan

Deligant

et al. 2021

Thermo

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“…The zeta potential of microfiltration membranes was determined using a SurPASS electrokinetic analyzer (Anton Paar) based on the streaming potential phenomenon and calculated by the Fairbrother‐Mastin equation 20 . The procedure for the zeta potential determination was previously described 21 .…”

Section: Methodsmentioning

confidence: 99%

Anti‐fouling performance of polyamide microfiltration membrane modified with surfactants

Maitam

Nicolini

Kronemberger

2022

J of Applied Polymer Sci

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Fouling is the main limitation in membrane separation processes. This phenomenon occurs by the adsorption/deposition of particles, colloids, or biomolecules on the membrane surface and it pores. This process can severely affect membrane performance due to the decrease in permeate flux, lifetime reduction, and selectively and separability changes. Studies have concluded that physicochemical superficial characteristics of membranes is a key for understanding and mitigating fouling. In this study, the surface of a commercial microfiltration membrane (MF) was modified with commercial surfactants and a biosurfactant to reduce fouling and improve its performance. Coated (MF‐SDS, MF‐CTAB, MF‐Tween80, and MF‐Rha) and uncoated membranes were characterized by Fourier‐transform infrared spectroscopy (FT‐IR), contact angle, and zeta potential. Microfiltration tests were performed by using Saccharomyces cerevisiae yeast suspensions as model fouling agent at different transmembrane pressures and feed flow rates. Interfacial analysis indicated that the adsorption of surfactants on the membranes' surface is responsible for significant changes in the membrane's hydrophilicity and superficial charges. Considering filtration of the model suspensions, the permeate flux values were increased for all coated membranes compared to the uncoated one. Long‐term experiments showed a high stability of the rhamnolipid adsorption on the membrane surface, proving its effectiveness in fouling reduction.

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“…Here we thoroughly discuss the standard molar Gibbs energy of micellization (Δ m G 0 ), standard molar enthalpy of micellization (Δ m H 0 ) and standard molar entropy of micellization (Δ m S 0 ). The obtained parameters are clearly arranged into tables and compared with those acquired by some other authors, and/or by other methods [18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60]. We did this because exact knowledge of parameters is inevitable for synthesis of the reliable in silico means of predicting bioavailability and the effects of the final drugs.…”

Section: Introductionmentioning

confidence: 99%

Effect of Molecular Composition of Head Group and Temperature on Micellar Properties of Ionic Surfactants with C12 Alkyl Chain

et al. 2019

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The paper analyses influences of the temperature and hydrophilic groups on micellar properties of ionic surfactants with 12-carbonic hydrophobic chains. The aim is to assess the impact of hydrophilic groups and temperature on thermodynamic parameters and micellization. This knowledge is indispensable for the formulation of new dosage forms. The method uses conductometric measurements. The following hydrophilic groups are analyzed: trimethylammonium bromide, trimethylammonium chloride, ethyldimethylammonium bromide, didodecyldimethylammonium bromide, pyridinium chloride, benzyldimethyl-ammonium chloride, methylephedrinium bromide, cis and trans-[(2-benzyloxy)-cyclohexyl-methyl]-N, N-dimethylammonium bromide, sodium sulphate and lithium sulphate. Except for a few cases, there is a good agreement between values of critical micellar concentrations (CMC) and critical vesicle concentration (CVC) obtained here and those which were obtained by other authors and/or by other physicochemical methods. Values of the CMC are compared with respect to the molar masses of hydrophilic groups. It was found that CMC values increased non-linearly with increasing system temperature. The degrees of counterion binding and thermodynamic parameters, like the standard molar Gibbs energy, enthalpy and entropy of micellization are determined and discussed in detail. The results obtained will be incorporated into in silico processes of modeling and design of optimal dosage forms, a current interdisciplinary research focus of the team.

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Effects of different surfactants and physical properties on the coalescence of dimethyl disulfide drops with mother phase at the interface of sodium hydroxide aqueous solutions

Cited by 12 publications

References 15 publications

In-Process Monitoring of Temperature Evolution during Fused Filament Fabrication: A Journey from Numerical to Experimental Approaches

In-Process Monitoring of Temperature Evolution during Fused Filament Fabrication: A Journey from Numerical to Experimental Approaches

Anti‐fouling performance of polyamide microfiltration membrane modified with surfactants

Effect of Molecular Composition of Head Group and Temperature on Micellar Properties of Ionic Surfactants with C12 Alkyl Chain

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