Highly concentrated oil-in-water (O/W) emulsions stabilized by catanionic surfactants

Zhang, Na; Fu, Yanxu; Chen, Guojun; Liang, Dong; Abdunaibe, Aibu; Li, Hongguang; Hao, Jingcheng

doi:10.1016/j.colsurfa.2016.02.009

Cited by 12 publications

(3 citation statements)

References 40 publications

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“…a, b and d). Microscopies show how the proteins, besides being located as a matrix filler, surround the oil drops, observed as gray or black circles, keeping the mass emulsified (Zhang et al ., ). Starch granules and the proteins remain mixed in the dough structure as part of the matrix.…”

Section: Resultsmentioning

confidence: 97%

Amaranth functional cookies exert potential antithrombotic and antihypertensive activities

Sabbione

Suarez

Añón

et al. 2018

Int J of Food Sci Tech

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In this study, amaranth flour was used as an ingredient to prepare gluten-free cookies. The production process and attributes of amaranth cookies were characterised, and the potential use of amaranth flour as a functional ingredient was analysed. Cookies exhibited a non-uniform reddish brown colour and a cookie factor ratio of 4.5 AE 0.6. Storage studies indicated that after 3 weeks at room temperature cookies presented slight variations in the texture. Simulated gastrointestinal digestion of this product was able to release peptides capable of exerting potential antithrombotic and antihypertensive activities, IC 50 values of 0.22 AE 0.04 and 0.23 AE 0.03 mg mL À1 protein, respectively. This work demonstrates for the first time that food made with amaranth flour exerts potential antithrombotic and antihypertensive activity. In conclusion, these amaranth cookies could be an alternative way of incorporating potentially health beneficial products for people who choose a conscious diet, including coeliac or vegan consumers.

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Section: Resultsmentioning

confidence: 97%

Amaranth functional cookies exert potential antithrombotic and antihypertensive activities

Sabbione

Suarez

Añón

et al. 2018

Int J of Food Sci Tech

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“…Thus, there are different types of additives and chemical formulation (chemical treatment) used as viscosity reducers, which are cheap and commercially available (Martínez-Palou et al , 2011; Hasan et al , 2010; Gateau et al , 2004; Nesterenko et al , 2014). Therefore, different types of chemical formulation studies by using stabilized water-in-oil emulsions have been reported (Czarnecki and Moran, 2005; Zhang et al , 2016; Nesterenko et al , 2014; Horváth-Szabó et al , 2002; Arla et al , 2007; Sinha et al , 2016; Delgado et al , 2007). In addition, different emulsions and its control are very complex, and can depend on treatment for heavy or extra-heavy crude oil, such as desalting process (Fortuny et al , 2008; Sad et al , 2015), hydrodynamic and homogeneous mixtures conditions (Nešić et al , 1995; Becerra et al , 2000; Gulbrandsen and Kvarekvål, 2007; Hong et al , 2002), dielectric and capacitive effects (Lesaint et al , 2010; Lvovich and Smiechowski, 2009), the chain length effect of the surfactant molecule (Asefi et al , 2009; Zhang and Somasundaran, 2006; Guyot, 2004), critical micelle concentration and the stable coalescence (water cuts) or water media (Domínguez et al , 1997; Bresciani et al , 2010; Zahariev et al , 2016).…”

Section: Introductionmentioning

confidence: 99%

The effect of non-ionic surfactant on the internal corrosion for X52 steel in extra-heavy crude oil-in-water emulsions

Quej-Aké

Contreras

Aburto

2018

ACMM

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Purpose The purpose of this research is to study different extra-heavy crude oil-in-water emulsions that can be found in practice for corrosion process of X52 steel adding 60 mg.L-1 of non-ionic surfactant and a corrosion inhibitor (CI). Electrochemical impedance spectroscopy and Tafel plots are carried out. Thus, Bode-modulus and Bode-phase angle plots are discussed. Adsorption isotherms obtained from corrosion rate (CR) values are taken into account. Design/methodology/approach Two-electrode arrangement is used to characterize the pseudo-capacitance values for X52 steel exposed to water and crude oil phases, mainly. Electrochemical evaluations for X52 steel exposed to extra-heavy crude oil-in-water emulsions are recorded in a conventional three-electrode cell to study the corrosion process as was documented in detail by Quej-Ake et al. (2015). Therefore, all electrodes are placed as close as possible to eliminate the iR-drop. Findings Pseudo-capacitance analysis shows that X52 steel immersed in oilfield produced water was more susceptible to corrosion than that immersed in ocean water solution and extra-heavy crude oil phase. After being analyzed, the X52 steel surface coverage and adsorption process for surfactant and CI could be concluded that surfactant could protect the metal surface. In a coalescence extra-heavy crude oil-in-water emulsion, the water medium generated a new solution that was more corrosive than the original water phase. Wash crude oil process was provoked in emulsion systems to sweep up the salts, mainly. Thus, corrosive species that can be recovered inside extra-heavy crude oil may appear, and in turn a new more corrosive solution could be obtained. Taking into account the straight line obtained in Bode-modulus plot for X52 exposed to extra-heavy crude oil, it is possible to point out that the negative value of the slope or R2 can be related to a coefficient (Jorcin et al., 2006). It is important to mention that electrochemical responses for X52 steel exposed to extra-heavy crude oil-in-water under coalescence emulsions revealed that corrosion and diffusion processes exist. Therefore, a possible good inhibitor is surfactant in emulsion systems. Originality/value CR and anodic and cathodic slopes suggest that the surfactant acted as mixed CI. Of these, susceptible anodic (MnS and perlite or cementite) and cathodic (ferrite) sites on steel surface could be affected, due to which physicochemical adsorption could happen by using electrochemical parameters analysis. Thus, no stable emulsions should be taken into account for extra-heavy crude oil transportation, because corrosion problems in atmospheric distillation process of the crude oil due to stable emulsion cannot be easily separated. In this manner, coalescent emulsions are more adequate for transporting extra-heavy crude oil because low energy to separate the water media is required.

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“…Emulsifiers play a key role in the formation of HIPE and show significant influences on the porous structures of resultant polyHIPEs. ,, Particles and conventional surfactants were employed to stabilize HIPE templates for the preparation of HPC in the above-mentioned reports. Gemini surfactant (GS) consisting of two monomeric surfactants is a promising type of surfactant with enhanced capabilities, such as much lower critical micelle concentration, higher surface activity, better solubility, and a lower Krafft point. − Hence, it is expectable that HPC with new features could be obtained from HIPE template using GS as the emulsifier.…”

Section: Introductionmentioning

confidence: 99%

Distinctive Performance of Gemini Surfactant in the Preparation of Hierarchically Porous Carbons via High-Internal-Phase Emulsion Template

Zhao

Zhang

et al. 2018

Langmuir

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The superior capability of gemini surfactant (GS) in the preparation of hierarchically porous carbons via high-internal-phase emulsion (HIPE) template followed by pyrolysis was confirmed in this work. Polymerized HIPEs (polyHIPEs) of phenol-formaldehyde resin were prepared by cross-linking the continuous phase of HIPEs stabilized by GS. Nonionic surfactant and cationic surfactant were also selected to stabilize HIPE for comparison. From scanning electron microscope observations, polyHIPEs with open-cell pore architectures were obtained with GS as emulsifier (polyHIPEs-GS) and the derived carbon foams (carboHIPEs-GS) well retained the original pore architectures, whereas polyHIPEs obtained using contrastive surfactants showed closed-cell porous structures and notable differences were observed for the derived carboHIPEs. Nitrogen adsorption/desorption measurements indicated that polyHIPEs-GS and carboHIPEs-GS both exhibited hierarchically porous architectures with much higher surface areas (SA) than those of the corresponding contrast samples. Mercury intrusion porosimetry results indicated that carboHIPEs-GS possessed higher SA and higher porosity than that of the contrast samples. The open-cell pore architecture and high SA are favorable to many applications, like energy storage. carboHIPE-GS expectably showed a higher capacitance than that of contrast samples when used as the electrode material of supercapacitor.

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Highly concentrated oil-in-water (O/W) emulsions stabilized by catanionic surfactants

Cited by 12 publications

References 40 publications

Amaranth functional cookies exert potential antithrombotic and antihypertensive activities

Amaranth functional cookies exert potential antithrombotic and antihypertensive activities

The effect of non-ionic surfactant on the internal corrosion for X52 steel in extra-heavy crude oil-in-water emulsions

Distinctive Performance of Gemini Surfactant in the Preparation of Hierarchically Porous Carbons via High-Internal-Phase Emulsion Template

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