Article
Chemistry, Physical
Xiaomin Liu, Zhao Chen, Zhenggang Cui
Summary: This paper proposes a mixed surfactant system that can achieve both ultralow oil/water interfacial tension and high foaming performance simultaneously. Under the reservoir conditions of Daqing oilfield, the ternary surfactant mixture SDS/DTAB/APG was found to be the optimal surfactant system. The study demonstrates that this surfactant system can achieve ultralow interfacial tension and high foaming performance over a wide range of total concentrations.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Chemistry, Physical
Ce Wang, Yang Liu, Na Wang, Yuanyuan Zhang, Lu Zhang, Sui Zhao
Summary: The catanionic surfactant mixture of SDS and C12TAB at a molar ratio of 2:1 showed outstanding synergistic effect in improving the wettability of low energy substrates without the need for complex synthesis of new amphiphiles. This mixture formed a compactly arranged layer at the solid-liquid interface, leading to significant hydrophilic modification of substrates. Overall, catanionic surfactant mixtures may be a promising system for regulating wettability.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Materials Science, Multidisciplinary
Keen Hoe Ho, Martin van Meurs, Xuehong Lu, Soo Khim Lau
Summary: In this study, the addition of a low-cost Janus molecule called HOS to HMS-PP successfully enhanced the expansion ratio and compressive strength of macrocellular PP foams. HOS acted as a surfactant during the extrusion foaming process, stabilizing cell growth and reinforcing the cell surface. Furthermore, HOS slightly improved the viscosity and melt strength of PP and reduced its shear viscosity as a lubricant. This approach provides a simple and economically viable materials design guideline for alleviating the trade-off between expansion ratio and compressive strength in macrocellular polymer foams.
MATERIALS & DESIGN
(2022)
Review
Engineering, Chemical
Badri Vishal
Summary: Although aqueous foam is composed of simple fluids, it shows complex rheological behavior. Understanding this behavior is important for industrial applications in various fields. The stability of foam is related to the air-water interface, and the rheological properties of aqueous foam highly depend on its interfacial properties.
REVIEWS IN CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Physical
Fatmegyul Mustan, Nadya Politova-Brinkova, Zahari Vinarov, Damiano Rossetti, Pip Rayment, Slavka Tcholakova
Summary: This study aimed to investigate the relationship between surfactant structure and foam stability. It was found that sucrose palmitate or stearate can provide exceptional foam stability. The stability of the foam is influenced by the number of EO groups, the length of the surfactant tail, and the presence of double bonds. Diesters present in the fatty acid esters also play a crucial role in foam stabilization.
ADVANCES IN COLLOID AND INTERFACE SCIENCE
(2022)
Article
Chemistry, Applied
Dengfeng Peng, Wei Shang, Jing Yang, Kangyu Li, Wangyang Shen, Chuyun Wan, Fang Geng, Qianchun Deng, Weiping Jin
Summary: This study investigates the influence of pectin on surface modulation of gliadin nanoparticles (GNPs) and its effects on the structure, interfacial properties, and macroscopic foaming performances of GNPs within a pH range of 3.5-5.8. Results show that pectin and gliadin can form complex nanoparticles (GPNPs) through electrostatic interaction at pH values ranging from 3.5 to 5.8. The foam covered by GPNPs exhibits significantly prolonged half-life time compared to GNPs at pH 3.5, due to the hard particle-like characteristic of GPNPs and the formation of a steric barrier layer. GPNPs at pH 5.8 display deformable property and can form a tight interfacial layer through cross-linking with pectin.
FOOD HYDROCOLLOIDS
(2023)
Article
Chemistry, Physical
Chi M. Phan
Summary: This study introduces a model for fitting surface tension of water/ethanol mixture across the complete composition range, and presents a new method for calculating the composition of the interfacial layer in binary liquid mixtures and surfactant solutions.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Chemistry, Physical
Xiaoyang Yu, Fan Li, Huasong Fang, Xuyang Miao, Jiyun Wang, Ruowen Zong, Shouxiang Lu
Summary: This study systematically investigated the foaming behavior of a zwitterionic fluorocarbon surfactant used in fire-fighting, revealing differences compared to hydrocarbon surfactants in terms of surfactant adsorption dynamics and solution viscosity. The presence of vesicles formed by FC1157 molecules in solution strongly influences the solution viscosity and foaming ability, highlighting the importance of viscosity and self-assembly structure in determining the foaming behavior.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Chemistry, Physical
Shasha Jiang, Xiaoyu Li, Shuitao Gao, Cheng Ma, Tongyue Wu, Zhijie Liu, Ting Gu, Jinwan Qi, Yun Yan, Xinmin Song, Jianbin Huang
Summary: Hydrocarbons are found to be a distinct stimulus for the selfassembly transition in catanionic surfactant systems, with cyclic and chain-like hydrocarbons having opposite effects. The saturation state of hydrocarbons is not relevant to the self-assembly transition; the determining factor is whether the alkanes are cyclic or chain-like.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Energy & Fuels
Himanshu Kesarwani, Amit Saxena, Ajay Mandal, Shivanjali Sharma
Summary: The present study investigated the effects of a binary surfactant mixture on various aspects of surfactant polymer flooding, including the critical micelle concentration, adsorption behavior, interfacial properties, and wetting characteristics. By comparing initial and final concentrations of the surfactant mixture, it was found that the binary surfactant mixture outperforms individual surfactants and efficiently reduces surfactant adsorption by 63%. Additionally, the binary surfactant mixture achieved an ultralow interfacial tension value of 0.0097 mN/m and was able to recover up to 76% of the total oil in sand pack flooding experiments.
Article
Chemistry, Physical
R. K. Thomas, J. Penfold
Summary: Understanding and optimizing the mixing properties of surfactants at interfaces and in bulk solution is crucial for their diverse applications in industry, technology, biology, and households. The use of neutron reflectivity (NR) and small angle neutron scattering (SANS) with isotopic substitution has enabled quantitative analysis and understanding of surfactant mixing at the air-water interface and in self-assembled aggregates or micelles in solution. This approach provides important insights into the thermodynamic properties and trends of mixed surfactants, which are not readily obtainable from analyzing data solely based on the variation in critical micelle concentration (cmc) alone.
ADVANCES IN COLLOID AND INTERFACE SCIENCE
(2023)
Review
Chemistry, Multidisciplinary
Masaaki Akamatsu, Kenichi Sakai, Hideki Sakai
Summary: This review discusses the important roles of molecular systems that utilize light as a stimulus or driving force in biological and artificial molecular functions. Photoresponsive surfactants with photochromic moieties are attractive materials that offer control over interfacial functions and self-assembly ability through photoirradiation. The examples and characteristics of photoresponsive surfactants are discussed, categorized into three types of photochromic reaction modes: isomerization, cleavage, and reversible cleavage.
Article
Chemistry, Multidisciplinary
Qiqi Niu, Zhaoxia Dong, Qichao Lv, Fengfan Zhang, Hao Shen, Zihao Yang, Meiqin Lin, Juan Zhang, Kang Xiao
Summary: CO2 enhanced oil recovery with viscoelastic surfactant-stabilized foam shows excellent stability and foam performance. The aggregation and adsorption behavior of the surfactant are affected by temperature and salt concentration.
JOURNAL OF CO2 UTILIZATION
(2022)
Article
Chemistry, Physical
Gourab Chakraborty, Satyajit Pramanik, Uddipta Ghosh
Summary: The linear stability of two-layer channel flows in the presence of bulk-soluble surfactants is investigated, considering the rheological properties of the interface. The bulk solubility of surfactants has a stabilizing effect on the interface, while the interfacial viscosities play a complex role depending on various factors. These results can contribute to the design of stable co-flow systems.
Article
Chemistry, Multidisciplinary
Sonali Mondal, Sumana Pyne, Partha Pyne, Animesh Patra, Rajib Kumar Mitra, Soumen Ghosh
Summary: Polymer/surfactant composites are used as excipients for water-insoluble solutes, with enhanced dissolution ability attributed to the formation of pre-micellar polymer surfactant aggregates (PS) at lower concentrations than the surfactant critical micelle concentration in water. This study investigates the microscopic interfacial structure of PS in composite media, including interface electrostatics and surface polarity. It is found that changing the polymer concentration in a composite system can regulate the counter-ion binding ability, surface potential, charge density, packing, and surface polarity of the PS interface, leading to increased solute dissolution. The modulation of the PS interface also acts as a barrier for the relocation of water-soluble charged solutes into the PS pseudo-phase, as shown by fluorescence anisotropy studies.
Article
Polymer Science
Tiago Outerelo Corvo, Antoine Jourdain, Shona O'Brien, Frederic Restagno, Eric Drockenmuller, Alexis Chenneviere
Summary: This study investigates the influence of nanostructure of poly(ionic liquid)s on the macromolecular conformation of polymer chains using small-angle neutron scattering. The results show that the nanostructure of poly(ionic liquid)s leads to an increase in the radius of gyration of polymer chains in solution and a nonmonotonic evolution in bulk. Furthermore, evidence of interdigitation of alkyl side chains is observed.
Correction
Chemistry, Medicinal
Ana Teresa Silva, Isabel S. Oliveira, Joana Gomes, Luisa Aguiar, Diana Fontinha, Denise Duarte, Fatima Nogueira, Miguel Prudencio, Eduardo F. Marques, Catia Teixeira, Ricardo Ferraz, Paula Gomes
Article
Nanoscience & Nanotechnology
Xavier Chevalier, Gwenaelle Pound-Lana, Cindy Gomes Correia, Sebastien Cavalaglio, Benjamin Cabannes-Boue, Frederic Restagno, Guillaume Miquelard-Garnier, Sebastien Roland, Christophe Navarro, Guillaume Fleury, Marc Zelsmann
Summary: In this study, the self-assembly of a lamellar block copolymer (BCP) was investigated under different wetting conditions. The chemical composition of under-layers and top-coats was found to influence the thin film stability, self-assembly kinetics, and BCP domain orientation. The dewetting of the BCP layer and the self-organization kinetics were explored using controlled wetting configurations.
Article
Physics, Multidisciplinary
Gabriel Guyard, Frederic Restagno, Joshua D. McGraw
Summary: Hydrodynamic flows in compliant channels have significant implications in physiology and microfluidics. This study investigates the relaxation dynamics of thin and soft rectangular microfluidic channels and provides a complete description of the experimental results. The findings contribute to the understanding of elastohydrodynamic coupling and the time-dependent behavior of compliant channel networks.
PHYSICAL REVIEW LETTERS
(2022)
Article
Biochemistry & Molecular Biology
Isabel S. Oliveira, Sandra G. Silva, Maria Luisa do Vale, Eduardo F. Marques
Summary: This study investigated the aggregation properties of two catanionic mixtures containing biomimetic surfactants derived from serine. One of the mixtures formed vesicles that only existed within a very narrow compositional range, with average diameters of 80 and 300 nm and a bimodal population. These vesicles are promising for application as drug/gene nanocarriers.
Article
Materials Science, Paper & Wood
Catarina Costa, Carla Silva, Eduardo F. Marques, Nuno G. Azoia
Summary: Long-chain cellulose esters (LCCEs) are cellulose derivatives with properties relevant to diverse applications. In this study, LCCEs were evaluated as eco-friendly hydrophobic additives in textiles with different compositions. The LCCE-based formulations were applied using a conventional textile dry-cleaning process. Water-repellent textiles were obtained through sustainable flourine-free compounds, without the need for crosslinkers or pre-treatments.
Article
Materials Science, Paper & Wood
Catarina Costa, Carla Silva, Eduardo F. Marques, Nuno G. Azoia
Summary: The textile industry is interested in developing waterproof, self-cleaning, and stain-resistant clothing and textiles. This study developed fluorine-free formulations based on long-chain cellulose esters, synthesized from recycled cellulose, to enhance hydrophobicity in textiles. These eco-friendly and sustainable formulations provide a simple and effective alternative to current compounds used for water repellency in textiles, with non-toxicity and ease of application.
Article
Mechanics
Marie Corpart, Frederic Restagno, Francois Boulogne
Summary: The origin of the difference between the deposition of suspended particles in a sessile droplet and in an axisymmetric droplet deposited on a fiber is analyzed. The shape of the droplet on a fiber and its evaporative flux are modeled to derive analytical calculations. The hydrodynamics equations in the liquid phase are solved under the lubrication approximation to determine the flow velocity toward the contact lines. The substrate curvature plays a role in contact line depinning, local evaporative flux, and liquid flow field.
JOURNAL OF FLUID MECHANICS
(2023)
Article
Biochemistry & Molecular Biology
Catarina Costa, Andre Viana, Isabel S. S. Oliveira, Eduardo F. F. Marques
Summary: Interactions between polymers and surfactants in aqueous solution have significant implications in physical chemistry and industrial applications. By synthesizing two ionic derivatives from recycled cellulose, we explored the interactions of these polymers with different types of surfactants commonly used in the textile industry. The results showed that oppositely charged polymer/surfactant mixtures exhibited strong associations, while similarly charged mixtures showed minimal interactions except for the QC/CTAB system. Furthermore, the P/S mixtures significantly enhanced the hydrophilicity of a hydrophobic textile substrate at lower surfactant concentrations compared to surfactant alone.
Article
Multidisciplinary Sciences
Chiara Guidolin, Jonatan Mac Intyre, Emmanuelle Rio, Antti Puisto, Anniina Salonen
Summary: Foams are unstable jammed materials whose evolution over time is crucial for applications. Despite the importance of foams made from viscoelastic fluids, the coarsening mechanism is not well understood. In this study, we investigated the impact of continuous phase viscoelasticity on foam coarsening using foamed emulsions and found that bubble size evolution is slowed down and foam structure is greatly affected. The absence of continuous phase redistribution and the complex link between foam structure and mechanical properties contribute to spatially heterogeneous coarsening. These findings not only have implications for designing foamy materials, but also provide a macroscopic understanding of phase separation in viscoelastic mediums.
NATURE COMMUNICATIONS
(2023)
Article
Physics, Fluids & Plasmas
Marina Pasquet, Frederic Restagno, Isabelle Cantat, Emmanuelle Rio
Summary: This article investigates the production, drainage, and stability of foam films, focusing on the regime of large velocities and large film sizes. The thickness profile of the film is found to follow an exponential pattern influenced by gravity and surface elasticity. A proposed model takes into account the interplay between gravity, film elasticity, and film extraction, and accurately predicts experimental data.
PHYSICAL REVIEW FLUIDS
(2023)
Article
Chemistry, Physical
Dmitriy Moreira, Oren Regev, Nuno Basilio, Eduardo F. Marques
Summary: This study develops a delivery system based on dual light and pH responsive vesicles, which can achieve precise drug release. By adjusting the acid and base conditions and UV irradiation, the release of the drug is successfully controlled, demonstrating the potential application of vesicles as nano-carriers in acidic environments such as tumors.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Multidisciplinary Sciences
Nicolo Galvani, Marina Pasquet, Arnab Mukherjee, Alice Requier, Sylvie Cohen-Addad, Olivier Pitois, Reinhard Hohler, Emmanuelle Rio, Anniina Salonen, Douglas J. Durian, Dominique Langevin
Summary: Coarsening is crucial for the stability of dense particle packings and this study presents coarsening experiments on wet foams. The experiments reveal a self-similar regime with an invariant bubble size distribution, and an unexpected excess of small roaming bubbles. A critical liquid fraction above which the bubble assembly unjams and the two bubble populations merge into a single narrow distribution of bubbly liquids is identified. The study proposes a new comprehensive view of the coarsening phenomenon in wet foams.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2023)
Article
Chemistry, Physical
Marina Pasquet, Nicolo Galvani, Alice Requier, Sylvie Cohen-Addad, Reinhard Hohler, Olivier Pitois, Emmanuelle Rio, Anniina Salonen, Dominique Langevin
Summary: Foam coarsening studies were conducted in the International Space Station (ISS) to suppress drainage due to gravity. The coarsening rates for the driest foams and bubbly liquids were determined and found to be in close agreement with theoretical predictions. A sharp cross-over between different bubble growth laws was observed at a critical value of liquid fraction φ*, which was significantly larger than the random close packing volume fraction of the bubbles φ(rcp).
Article
Physics, Fluids & Plasmas
Suzanne Lafon, Alexis Chenneviere, Frederic Restagno, Samy Merabia, Laurent Joly
Summary: The effect of temperature on friction and slip at the liquid-solid interface has been studied both numerically and experimentally over the past 20 years. However, the role of temperature on slip close to the glass transition has not been well explored. In this study, molecular dynamics simulations were used to investigate the effect of temperature on friction and slip length in a bidisperse atomic fluid. The results showed that at high temperatures, an Arrhenius law fits well, while in the supercooled state, the viscosity becomes super-Arrhenian and the interfacial friction can drastically decrease, leading to a significant increase in slip length.
Article
Chemistry, Physical
Yiping Yin, Zhe Wang, Hua Zou
Summary: This study presents a novel method for preparing dimpled polymer-silica nanocomposite particles using interfacial swelling-based seeded polymerization. The optimized conditions allow for a relatively high percentage of dimpled particles to be achieved.
Article
Chemistry, Physical
Brenden D. Hoehn, Elizabeth A. Kellstedt, Marc A. Hillmyer
Summary: Porous materials with nanometer-scale pores have important applications as nanoporous membranes. In this study, ABA triblock copolymers were used as precursors to produce nanoporous polymeric membranes (NPMs) in thin film form by degrading the end blocks. Polycyclooctene (PCOE) NPMs with tunable pore sizes were successfully prepared using solvent casting technique. Oxygen plasma etching was employed to improve the surface porosity and hydrophilicity of the membranes. This study provides a straightforward method to produce tough NPMs with high porosity and hydrophilic surface properties.
Article
Chemistry, Physical
Vladislav S. Petrovskii, Stepan I. Zholudev, Igor I. Potemkin
Summary: This article investigates the behavior of linear and ring polypeptide chains in aqueous solution and explores the properties of the complexes formed by these chains with oppositely charged surfactants. The results demonstrate that the complexes of linear supercharged unfolded polypeptides and the corresponding surfactants exhibit impressive adhesive properties.
Article
Chemistry, Physical
Merve Cevik, Serkan Dikici
Summary: Cardiovascular diseases are a leading cause of death globally, and vascular grafts are a promising treatment option. This study focuses on tissue-engineered vascular grafts (TEVGs) using decellularized parsley stems as a potential biomaterial. The decellularized parsley stems showed suitable properties for TEVGs, providing a suitable environment for human endothelial cells to form a pseudo endothelium. This study showcases the potential of using parsley stems for TEVGs.
Article
Chemistry, Physical
Gustavo A. Vasquez-Montoya, Tadej Emersic, Noe Atzin, Antonio Tavera-Vazquez, Ali Mozaffari, Rui Zhang, Orlando Guzman, Alexey Snezhko, Paul F. Nealey, Juan J. de Pablo
Summary: The optical properties of liquid crystals are typically controlled by electric fields. In this study, we investigate the effects of microfluidic flows and acoustic fields on the molecular orientation and optical response of nematic liquid crystals. We identify several previously unknown structures and explain them through calculations and simulations. These findings hold promise for the development of new systems combining sound, flow, and confinement.
Article
Chemistry, Physical
Xinjun Wu, Xin Guan, Shushu Chen, Jiangpeng Jia, Chongyi Chen, Jiawei Zhang, Chuanzhuang Zhao
Summary: This research presents a novel shape memory hydrogel with a remodelable permanent shape and programmable cold-induced shape recovery behavior. The hydrogel is prepared using specific treatment methods to achieve shape fixation by heating and shape recovery by cooling. Additionally, deformable devices can be obtained by assembling hydrogel blocks with different concentrations.
Article
Chemistry, Physical
Rebecca Hengsbach, Gerhard Fink, Ulrich Simon
Summary: This study examines the properties of DNA functionalized pNipmam microgels and pure pNipmam microgels at different concentrations of sodium chloride and in PBS solutions using temperature dependent H-1-NMR measurements. The results show that DNA modification affects the volume phase transition temperature and the addition of salt and PBS further enhances this effect.
Article
Chemistry, Physical
Ningyi Li, Junhong Li, Lijingting Qing, Shicheng Ma, Yao Li, Baohui Li
Summary: This paper investigates the self-assembly behavior of colloids with competing interactions under spherical confinement and finds that different ordered structures can be formed under different sized spherical confinements. Moreover, more perforated structures are formed in smaller spheres.
