Article
Biochemical Research Methods
Katarzyna Pawlak, Kamil Wojciechowski
Summary: The new method provides simultaneous determination of sodium lauryl sulfate and sodium laureth sulfate homologues with high specificity and extended applicability. It successfully validated manufacturers' claims through simplified molecular ion monitoring and the use of a semi-quantitative approach.
JOURNAL OF CHROMATOGRAPHY A
(2021)
Article
Chemistry, Physical
Emmanouil Kainourgiakis, Jannis Samios
Summary: This research investigates the micellization behavior of a cationic surfactant in water through very long atomistic molecular dynamics simulations, focusing on properties such as free monomer count, micelle size and shape, and critical micelle concentration. The results show good agreement with experimental data and indicate that system equilibrium is achieved after approximately 800 nanoseconds.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Thermodynamics
Balaji Bakthavatchalam, Khairul Habib, Cecilia D. Wilfred, R. Saidur, Bidyut Baran Saha
Summary: This paper investigates the application of an ionic liquid in nanofluids and compares its stability and thermal properties with conventional surfactants. The results show that the inclusion of the ionic liquid improves the thermal conductivity and stability of the nanofluid. However, the electrostatic repulsive force of the ionic liquid decreases with increasing temperature. The nanofluid containing the ionic liquid demonstrates the most significant enhancement in thermal conductivity at 303 K and a maximum dispersion stability of over one month.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Biochemical Research Methods
Fotouh R. Mansour, Christopher T. Desire, Emily F. Hilder, R. Dario Arrua
Summary: The study investigated the effect of adding ethoxylated sorbitan ester surfactants (Tweens (R)) to poly(ethylene glycol) diacrylate-based monolithic recipes, characterizing the monoliths through scanning electron microscopy, infrared spectroscopy, and nitrogen physisorption analysis. Different types of Tween (R) resulted in different morphological features and surface areas. The optimized column was successfully used for separating mixtures with a maximum efficiency of 60,000 plates/m.
JOURNAL OF CHROMATOGRAPHY A
(2021)
Article
Multidisciplinary Sciences
A. Lopez-Prieto, A. B. Moldes, J. M. Cruz, B. Perez-Cid
Summary: In this study, the chemical characterization and surface-active properties of two biosurfactants extracted from corn steep liquor were compared. The biosurfactant extracted with chloroform (BS1) had a higher phospholipids content and showed greater similarity to the commercial surfactant lecithin. The biosurfactant extracted with ethyl acetate (BS2) performed better in solubilizing cuprous oxide in water. Optimum conditions for solubilizing cuprous oxide were also determined. It was found that the presence of phospholipids inhibited the solubilization of copper-based pesticides in water.
SCIENTIFIC REPORTS
(2022)
Article
Chemistry, Physical
Jia Ren, Hongyan Xiao, Xulong Cao, Fuqing Yuan, Binlin Pan, Baodong Ma, Lei Zhang, Lu Zhang
Summary: The mixed system of betaine and extended surfactants was studied to understand its effects on interfacial properties and interfacial tension (IFT) reduction. Molecular dynamics simulations and IFT measurements were conducted to analyze the effects of betaine structure and length of oxypropylene (PO) chain of extended surfactant. The results showed that the interfacial behavior of short PO chain was controlled by betaine structure, while that of long PO chain was independent of betaine structure. The xylyl substituted alkyl sulfobetaine (XSB) mixed with short PO chain extended surfactant system exhibited significant synergistic effect in reducing IFT, while it had a negative effect with long PO chain extended surfactant.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Food Science & Technology
Paiam Negahdar Panirani, Hosain Darvishi, Adel Hosainpour, Nasser Behroozi-Khazaei
Summary: Developing bakery techniques is crucial for improving the qualitative and quantitative parameters of bread baking. This study evaluated the impact of different baking methods on baking kinetics, energy consumption, mechanical properties, volume expansion, and sensory parameters of bread. The results showed that the ohmic-conventional method increased baking time, while the combined infrared-conventional method significantly reduced it. The combined ohmic-conventional method had the highest specific energy consumption and volume expansion, while the infrared-conventional method scored highest in taste and flavor in sensory evaluation.
INNOVATIVE FOOD SCIENCE & EMERGING TECHNOLOGIES
(2023)
Article
Electrochemistry
Raymond Horia, Dan-Thien Nguyen, Alex Yong Sheng Eng, Zhi Wei Seh
Summary: This study compared the electrochemical performance of four commercially available magnesium salts and found that magnesium bis(hexamethyldisilazide) is the most reductively stable. It enables excellent magnesium plating/stripping without the need for chloride additives. The results also showed that a chloride-free electrolyte is most appropriate for future development of rechargeable magnesium batteries.
BATTERIES & SUPERCAPS
(2022)
Article
Chemistry, Physical
Jana Madejova, Martin Barlog, Lubos Jankovic, Michal Slany, Helena Palkova
Summary: Organo-montmorillonites are highly attractive materials with wide application potential. This study reported the structural, vibrational, and thermal characteristics of two series of alkylammonium- and alkylphosphonium-montmorillonites for the first time. It was found that phosphonium-based montmorillonites had higher interlayer space expansion and higher decomposition rate temperature compared to their ammonium counterparts.
APPLIED CLAY SCIENCE
(2021)
Article
Pharmacology & Pharmacy
Benedykt Kozuch, Johanna Weber, Julia Buske, Karsten Maeder, Patrick Garidel, Tim Diederichs
Summary: A comparative stability study was conducted to investigate the oxidative degradation tendencies of surfactants polysorbate 20 (PS20) and polysorbate 80 (PS80) at different concentrations stored for 48 weeks at varying temperatures. PS80 showed stronger degradation and earlier onset of oxidation compared to PS20, with significantly less oxidative processes observed at higher PS concentrations. Iron impurities, oxygen in the vial headspaces, and the pH values of the formulations were identified as main contributing factors to accelerate PS oxidation.
Article
Chemistry, Physical
Shaojie Li, Jun Yan, Yunfeng Zhang, Yuhong Qin, Yuling Zhang, Shiguo Du
Summary: In this study, the dispersion ability of six representative surfactants for carbon nanotubes (CNTs) was compared using molecular dynamics simulations and experimental investigations. Triton X-100 and sodium dodecyl benzenesulfonate (SDBS) showed the strongest interaction with CNTs, while sodium dodecyl sulfate (SDS) showed the weakest interaction. Structural factors such as the presence of benzene rings and long alkyl chains were found to enhance the adsorption efficiency of surfactants on the CNTs surface. This study provides guidance for selecting optimal surfactants for CNTs dispersion.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Electrochemistry
Arej S. Al-Gorair, S. Abd El Wanees, Ameena Mohsen Al-bonayan, Mohamed T. Alotaibi, Salih S. Al-Juaid, Mahmoud G. A. Saleh, S. Nooh, M. Abdallah
Summary: The potentiometric technique was used to study the effect of different concentrations of bromide ions on the repair and destruction of oxide films on indium electrodes in a sodium borate solution. Higher concentrations of bromide ions (≥5 x 10-2 M) reduce the growth of oxide films and initiate pitting corrosion. Ethoxylated surfactant molecules were used as inhibitors to resist oxide film destruction and promote repair by forming a layer of surfactant molecules. The inhibition efficacy depends on the surfactant concentration and the number of ethylene oxide monomers per molecule, with ETO III showing the highest inhibition efficacy.
INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE
(2023)
Article
Construction & Building Technology
Willian M. Duarte, Tiago F. Paulino, Sinthya G. Tavares, Kassio N. Cancado, Luiz Machado
Summary: Due to the high cost of electricity, the air conditioning sector is seeking efficient alternatives to produce cold air. This is especially necessary in Brazil, where 17% of residential electricity consumption is due to air conditioning systems. While there have been studies on the technical and economic data of heat-pumping and air conditioning systems, there is a lack of research considering applications with only cooling demand. This study presents a comparative analysis of conventional and geothermal air conditioning systems, using an open loop water system. The results show that in the best scenario, the geothermal system has 34% lower annual energy consumption compared to the conventional system and a payback time of 1.4 years.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Engineering, Chemical
Karen Fuentes, Claudia Matamala, Nayaret Martinez, Rommy N. Zuniga, Elizabeth Troncoso
Summary: This study evaluated the effect of various emulsifiers on the properties and stability of food grade nanoemulsions, finding that whey protein isolate (WPI) was an effective natural alternative to synthetic surfactants like Tween 20.
Article
Chemistry, Analytical
Xin Meng, Kechun Wen, Marimuthu Citartan, Qiao Lin
Summary: This study compares three SELEX strategies for aptamer isolation, including conventional agarose bead-based partitioning, microfluidic affinity selection, and fully integrated microfluidic affinity selection and PCR amplification. Using immunoglobulin E (IgE) as a model target molecule, the microfluidic strategies are shown to be more time- and cost-efficient than conventional SELEX.
