Article
Chemistry, Physical
Yangchun Xie, Tao Yang, Junjun Ma, Xiaohua He
Summary: A series of Gemini surfactants with asymmetric structures were synthesized through a two-step reaction process, showing higher surface activities and vesicle-forming abilities compared to traditional single-chain and symmetrical Gemini surfactants. Thermodynamic parameters indicated that the micellization processes of these Gemini surfactants were entropy-driven.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2021)
Article
Engineering, Chemical
Dileep Kumar, Javed Masood Khan, Mihalj Posa, Ajmal Koya Pulikkal, Bidyut Saha, Ajaya Bhattarai
Summary: This study investigates the effect of solutions of double-chained quaternary ammonium gemini surfactants on the rate constant of the ninhydrin and lysine reaction. The results show the impact of different conditions on the rate constant and provide insights into the binding constants and critical micellar concentration.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Engineering, Chemical
Zhen Wen, Peiwen Xiao, Pingmei Wang, Xue Han, Jule Ma, Shuangliang Zhao
Summary: This study systematically explores the influence of alkylbenzene sulfonate Gemini surfactants on the interfacial properties of dodecane/water systems using a dissipative particle dynamics simulation. It is found that increasing the hydrophobic chain length and spacer length can decrease the critical micelle concentration, induce nano-mixing phenomenon, and transform the system from a lamellar interface state to a micelle state.
CHEMICAL ENGINEERING SCIENCE
(2022)
Article
Chemistry, Physical
Dengxi Zhang, Zhicheng Xu, Zhiqiang Jin, Lei Zhang, Lu Zhang, Fenrong Liu, Wangjing Ma
Summary: This study investigated the adsorption behavior and wetting modification ability of sodium salts of bis-octadecenoyl succinate (GeminiC3, GeminiC6) and monomers on polymethyl methacrylate (PMMA) surfaces. The different spacer lengths resulted in slightly different behavior of surfactant molecules in solution. GeminiC3 exhibited complex self-aggregation behavior, forming micelles at low concentrations and transitioning to monolayer or multilayer vesicles. GeminiC6 had longer flexible spacer groups that hindered vesicle formation. Adsorption behavior at the gas-liquid interface was analyzed in three stages, showing a saturated monolayer and bilayer structure formed by GeminiC3 and C6 on PMMA surfaces. The monomers heavily adsorbed on PMMA surfaces and formed semi-colloidal aggregates, with the lowest contact angle reaching 38 degrees. Additionally, the monomers and GeminiC3/C6 surfactants demonstrated high hydrophilic modification ability on PMMA surfaces compared to other literature.
Article
Chemistry, Physical
Yaoqi Pan, Bingqing Ge, Yongle Zhang, Pan Li, Bogeng Guo, Xiaoyang Zeng, Jianguo Pan, Sen Lin, Pei Yuan, Linxi Hou
Summary: Novel rosin-based Gemini surfactants (RGS-n) exhibit lower critical micelle concentration and better cleaning efficacy, with RGS-14 showing the highest performance in cleaning PCBs. This research has specific significance for industrial circuit board cleaning using Gemini surfactants as a cleaning agent.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Chemistry, Physical
Katarzyna Szymczyk, Anna Taraba, Anna Zdziennicka, Bronislaw Janczuk
Summary: The adsorption and volumetric properties of TX114, T80, Q, and Ru were studied at different temperatures. The adsorption isotherms of nonionic surfactants and flavonoids mixtures were analyzed based on surface tension isotherms and thermodynamic parameters. Different methods for determining the composition of mixed surface layers were shown. The behavior of surfactants and flavonoids in the presence and absence of alcohol was analyzed in relation to micelle formations and molar volumes.
ADVANCES IN COLLOID AND INTERFACE SCIENCE
(2023)
Article
Chemistry, Physical
Vivian J. Spiering, Jana Lutzki, Michael Gradzielski
Summary: The study demonstrates that the incorporation of CO2 moieties in the head group of nonionic surfactants reduces the critical micellization concentration, favoring the micellization process and decreasing the temperature sensitivity.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Chemistry, Physical
Zachary R. Hinton, Nicolas J. Alvarez
Summary: This paper proposes a free energy model that is able to collapse experimental data of CiEj surfactants onto mastercurves, successfully representing the critical micelle concentration and adsorption isotherm parameters in terms of molecular parameters. By parameterizing and validating the molecular models, this theory takes a step towards engineering interfacial thermodynamics.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Chemistry, Multidisciplinary
Olivia M. Singer, Jacob W. Campbell, Jacob G. Hoare, Jason D. Masuda, Gerrard Marangoni, Robert D. Singer
Summary: Gemini surfactants are composed of two hydrocarbon tails with corresponding polar headgroups, linked via a covalent spacer. The improved synthetic approach of these symmetrical gemini surfactants has led to their characterization of crystalline packing for the first time ever using X-ray crystallographic analysis.
Article
Chemistry, Multidisciplinary
Tsukasa Morita, Shiho Yada, Tomokazu Yoshimura
Summary: In this study, we synthesized quaternary ammonium salt-based gemini surfactants with different spacer structures and investigated their properties. We found that the solubility of gemini surfactants in water was significantly affected by the spacer structure, and the adsorption and orientation at the air/water interface were influenced by the spacer length.
Article
Chemistry, Physical
Weiguang Yang, Yupeng Cao, Hongbin Ju, Yakui Wang, Yajie Jiang, Tao Geng
Summary: Novel amide Gemini surfactants with different hydrophobic chain lengths were synthesized and their surface properties were studied. The aggregation behavior in aqueous medium was analyzed using surface tension and negative staining TEM methods, showing good antistatic and antibacterial properties.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Biochemistry & Molecular Biology
Bogumil Eugene Brycki, Adrianna Szulc, Iwona Kowalczyk, Anna Kozirog, Ewelina Sobolewska
Summary: This study presents an innovative synthesis of a homologous series of alkylammonium gemini surfactants modified by an ether group, showing broad-spectrum antimicrobial activity. Results indicate that the synthesized compounds are effective microbicides against various microbes, highlighting their potential applications in the field of biocides.
Article
Chemistry, Physical
Yupeng Cao, Weiguang Yang, Yajie Jiang, Yakui Wang, Hongbin Ju, Tao Geng
Summary: The effect of different spacer groups on the performance of Gemini surfactants was investigated, with ZGS-S showing the strongest ability to reduce surface tension and highest electrolytes tolerance among the three surfactants. CGS-O exhibited the lowest performance in terms of surface tension reduction and electrolytes tolerance.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Chemistry, Multidisciplinary
Ayushi Mittal, Krishn, Fatemeh Zabihi, Fiorenza Rancan, Katharina Achazi, Chuanxiong Nie, Annika Vogt, Rainer Haag, Sunil K. Sharma
Summary: In this study, four novel Gemini amphiphiles were synthesized using a chemo-enzymatic approach for the development of biodegradable nanoscale delivery systems. The results showed that these nanocarriers exhibited varied self-assembly behavior and efficiently transported hydrophobic drug molecules into cells.
Article
Chemistry, Multidisciplinary
Manpreet Singh, Sugam Kumar, Vinod Kumar Aswal, Tejwant Singh Kang
Summary: The aggregation behavior of the SAIL and GS in aqueous medium has been studied using various techniques. The extent of synergistic interactions between the components depends on the composition of the surfactant mixture. The properties of the aggregates are influenced by hydrophobic and dipolar interactions, as well as counterion binding.
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.