Article
Chemistry, Physical
Chunhui Li, Xiumei Tai, Lingxiao Guo, Qian Chen, Yanyun Bai
Summary: The combination of anionic and cationic surfactants can achieve high surface activity, but precipitation at the isoelectric mole ratio is a common issue. The introduction of polyoxyethylene chains and Gemini quaternary ammonium surfactants can effectively address this problem and enhance the surface activity of the mixed system.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
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
Elia Grueso, Rosa M. Giraldez-Perez, Edyta Kuliszewska, Jesus A. Guerrero, Rafael Prado-Gotor
Summary: A new method for detecting DNA and lysozyme biomolecules was developed using gold nanoparticles, with a practical and economical approach. The method showed high sensitivity and immediate results, avoiding issues with time delays seen in previous sensor designs.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Engineering, Chemical
Xue Liang, Jun Dong, Weihong Zhang, Yanyang Mo, Yan Li, Jing Bai
Summary: This study investigates the solubilization of chlorinated hydrocarbons using synthesized anionic-nonionic gemini surfactants (GEOnS-m) in an aquifer. The results show that the solubilization rate increases with the decrease of ethylene oxide content (EO) of the surfactant molecules, and the solubilization process and form depend on the polarity of the chlorinated hydrocarbons. The study advances the application of anionic-nonionic gemini surfactants in surfactant-enhanced aquifer remediation (SEAR) for chlorinated hydrocarbon solubilization, providing important insights for the design and modeling of such processes.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Biochemistry & Molecular Biology
Maozhang Tian, Xi Chen, Xinyuan Zou, Yuchen Qian, Zhang Liu, Yaxun Fan
Summary: The aggregation behavior of anionic gemini surfactant and cationic monomeric surfactant mixtures was studied, showing that pH and total concentration control can affect the formation of different micelle structures. The mixed system exhibits high viscoelasticity at low pH and certain concentrations, which enhances drug delivery efficiency.
Review
Biochemistry & Molecular Biology
Wajih Al-Soufi, Mercedes Novo
Summary: The critical micellar concentration (cmc) is a fundamental property of surfactant solutions, which can be determined using a concentration model and equations for different surfactant properties. This modular concept allows for systematic and unambiguous determination of cmc, and can be applied to study both surfactants as well as non-surfactant systems.
Article
Chemistry, Physical
Mohamed A. Abo-Riya, Sharbat A. Baker
Summary: Conventional and gemini anionic sulphonate surfactants with different alkyl chain lengths were synthesized and characterized. The surface properties, adsorption energy, and micellization behavior of the synthesized surfactants were investigated. The dispersing effect of the surfactants in water solutions with different salinity was evaluated, and it was found that higher hydrophobicity improved the dispersing properties. Additionally, the synthesized surfactants exhibited higher adsorption ability at the surface compared to micellization in the solution.
JOURNAL OF MOLECULAR STRUCTURE
(2023)
Article
Chemistry, Applied
Afreen Nishat, Naved Azum, Abdullah M. Asiri, Najam Sardar
Summary: Gemini surfactants show stronger interaction with the polymer compared to their conventional counterpart CTAB; viscosity studies indicate significant interaction between Gemini surfactants and the polymer; thermodynamic parameters support the feasibility of interaction between the polymer and surfactant.
JOURNAL OF SURFACTANTS AND DETERGENTS
(2021)
Article
Energy & Fuels
Shuyun Feng, Zhaowen Jiang, Shanfa Tang, Ruizhi Hu, Lijun Jin, Siyao Wang, Rui Wang
Summary: A series of new Gemini surfactants were synthesized and characterized, showing good interfacial activity and low CMC values, promising for oil recovery in low permeability reservoirs. Varying the carbon number of the hydrophobic chain can control the surface activity and viscoelastic properties, helping to increase the oil-water interfacial tension and enhance oil recovery efficiency in reservoirs.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Chemistry, Physical
Arifa Shaheen, Arun Dhanagar, Rabia Arif
Summary: The interaction between anionic quantum dots (QDs) and a gemini surfactant [C(16)Im-3OH-ImC(16)]Br-2 in water resulted in luminescent self-assemblies. The surfactant self-associates into micelles before engaging with the QDs. The addition of the surfactant to the QD solution led to the formation of supramolecular and vesicle structures, with self-assembled QDs inside the spherical vesicles exhibiting luminescence.
Article
Chemistry, Applied
Sanbao Dong, Jiabao Fan, Hongmiao Lv, Taotao Qiang, Yue Ji, Weiwei Han
Summary: This study developed a foaming formula containing anionic, cationic, and zwitterionic surfactants, and optimized it through foaming ability and foam stability tests. The foaming formula exhibited excellent liquid unloading performance under high salinity, high condensate fraction, and high methanol fraction conditions.
JOURNAL OF SURFACTANTS AND DETERGENTS
(2023)
Article
Chemistry, Physical
Weiwei Han, Jiabao Fan, Hongmiao Lv, Yongli Yan, Chenwei Liu, Sanbao Dong
Summary: This study developed a surfactant mixture composed of alpha-olefin sulfonate, synthesized green cocamidopropyl betaine, and modified quaternary ammonium Gemini surfactant for gas well deliquification. The foam stabilized by this mixture exhibited high stability and improved foaming and liquid unloading efficiency in the presence of condensate. Temperature also played a role in the performance of the mixture.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Chemistry, Physical
Shida Hou, Jun Li, Yakui Wang, Yajie Jiang, Zhifei Wang, Tao Geng
Summary: This study investigates the surface properties and aggregation behavior of mixed systems containing two different anionic surfactants and a new cationic surfactant. The presence of long polyoxyethylene chains weakens the negative charge density of the hydrophilic head groups, leading to enhanced stability of the mixed systems. The mixed systems exhibit lower critical micelle concentration, faster diffusion rates, and superior wetting capability compared to single surfactants.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Review
Chemistry, Multidisciplinary
Camillo La Mesa, Gianfranco Risuleo
Summary: The surface activity of surfactant mixtures was analyzed, finding that while the decrease in cmc was substantial, the change in surface tension was moderate. The surface tension remained roughly constant throughout the concentration range, suggesting differences in desolvation of polar heads at interfaces between the two species. Differences in the sizes and solvation of the polar head groups may explain these findings.
FRONTIERS IN CHEMISTRY
(2021)
Article
Chemistry, Applied
Yongchen Cai, Hujun Xu, Peng Ling
Summary: This study investigated the properties of amide Gemini surfactants (DLP-12, DLP-14, and DLP-16). The results showed that these surfactants exhibit good wettability and solubility, with a decrease in these properties as the hydrophobic chain length increases. The critical micelle concentrations (CMC) measured by two different methods showed a decreasing trend with increasing hydrophobic chain length. The solubilization capacities in toluene improved with increasing chain length, while the surfactants demonstrated good thermal stability with high decomposition temperatures.
TENSIDE SURFACTANTS DETERGENTS
(2023)
Article
Chemistry, Physical
Wenjing Tan, Chunmei Gao, Shifeng Ji, Yunqing Xing, Yi Guo, Baogui Liang
Summary: Membrane separation technology is widely used in wastewater treatment due to its cost-effectiveness and productivity. However, organic membrane fouling caused by humic acid is a major barrier to its further development. This study successfully addressed this issue through the production of composite materials and self-cleaning membranes, providing beneficial strategies and solutions for membrane contamination problems.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Qichang Peng, Qingdong Ruan, Bin Wang, Jinyuan Liu, Chao Huang, Xingwang Zhu, Dan Li, Liangliang Liu, Yinchuan Wang, Xiaolin Zhang, Jia Yan, Paul K. Chu, Hui Xu
Summary: The escalating issue of water pollution has led to significant attention in the field of photocatalysis. In this study, OV-Sb2WO6-X photocatalyst with oxygen vacancies was synthesized, which exhibited enhanced charge separation efficiency and improved photocatalytic activity. The introduction of oxygen vacancies was successfully controlled and characterized, and the modified photocatalyst showed superior degradation efficiency for dye wastewater treatment.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Wangcheng Zhang, Cunchuan Zheng, Hu Xie, Weichao Du
Summary: By using a specific curing agent ETB, the problem of dispersion and stability for oily epoxy resin in cement slurry system has been successfully solved. The application of the emulsified curing agent ETB in oilfield cement slurry system shows good rheological performance, resistance to high temperature and high pressure water loss, and corrosion resistance.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
O. I. Krivonos, A. Babenko, O. B. Belskaya
Summary: This study synthesized biochar based on sapropel and investigated the effects of chemical modification on its textural characteristics, acid-base properties, and adsorption properties. The results showed that the chemical modification increased the fraction of micropores, specific surface area, and changed the surface properties of biochar. The experiment also revealed that biochar pretreated with alkali exhibited the maximum adsorption capacity for copper ions. A conceptual model identifying the mechanisms of copper adsorption on sapropel-based biosorbent was proposed.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
H. Lachhab, N. Benzbiria, A. Titi, S. Echihi, M. E. Belghiti, Y. Karzazi, A. Zarrouk, R. Touzani, C. Jama, F. Bentiss
Summary: The corrosion inhibitory potency of two new pyrimidine-pyrazole derivatives, PPA and PPC, was evaluated for mild steel in 1 M HCl. The results showed enhanced inhibition activities with increased concentration, reaching maximal values of 91.15% and 92.39% for PPA and PPC, respectively. However, the mitigation potency decreased with increasing temperature. SEM and XPS analysis revealed that PPA and PPC adsorbed on the mild steel surface, forming a shielding layer that prevented the dissolution of the steel in the acidic solution.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Shanmugapriya Sivalingam, D. Jeya Sundara Sharmila, Goutham Golla, Lakshmanan Arunachalam, Tarunendu Singh, G. Karthikeyan, A. Shanthi, Kannan Malaichamy
Summary: This study aims to develop a nano-biofungicide comprising of volatile essential oil molecules to enhance its efficacy in the field of agriculture through easily scalable green synthesis technique. The nano biofungicide was prepared through one pot hot melt ultrasonication technique with easy water dispersibility and long term stability. The physico-chemical analysis revealed that, nano bio-fungicides were amorphous sphere-shaped nanoparticles with low melting point. The encapsulation efficiency of major components of essential oil was determined, and it was found that they followed Higuchi model of release kinetics. The essential oil loaded nanostructured lipid carrier showed significantly higher mycelial growth inhibition compared to pure essential oil, indicating enhanced bio-efficacy.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Yinlong Li, Yingqing Zhan, Yiwen Chen, Hongshan Jia, Ximin Chen, Fei Zhu, Xulin Yang
Summary: In this study, ZnO quantum dots decorated MXene nanosheets were used as a functional filler for waterborne epoxy coating. The improved dispersion and synergy of ZnO QDs and MXene nanosheets enhanced the anticorrosion performance of the coating.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Fucheng Guan, Jing Tao, Qiang Yao, Zheng Li, Yihang Zhang, Shi Feng, Jianbin Sun, Qiang Yang, Xuecui Song, Jing Guo, Yuanfa Liu
Summary: This paper presents a method for preparing adsorbent materials based on biomass that can efficiently adsorb methylene blue. The experimental results show that the material has a hierarchical structure, high adsorption capacity, and reusability.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Pengfei Hu, Zuli Mo, Weiliang Wang, Chengzhe Li, Zhaojia Guo, Guanqing Lin, Zhimin Guo
Summary: This study developed a novel in-situ particle vision and measurement (PVM) system to investigate heterocoagulation between coarse and fine particles in mineral processing. The experimental results showed that the degree of heterocoagulation decreased with increasing pH and stirring speed. Furthermore, under certain hydrodynamic conditions, coal particles were more distributed at the rear of the glass bead.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Tanveer ul Haq Zia, Anwar ul Haq Ali Shah, Behisht Ara, Kashif Gul
Summary: A label-free immunosensor for detection of hepatitis C core antigen was fabricated using a ternary nanocomposite based on polypyrrole, silver doped zinc oxide, and exfoliated graphene. The immunosensor demonstrated low detection limit, high selectivity, and stability.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Xiaoyan Feng, Jiachen Li, Lijun Liang, Linli Zhu, Sa Liu, Li Ren
Summary: In this study, polystyrene divinylbenzene microspheres were surface-modified by poly(carboxybetaine methacrylate) to develop an efficient hemoperfusion adsorbent for the removal of protein-bound toxins. The modified microspheres showed increased adsorption capacity and better biocompatibility, making them promising for clinical hemoperfusion therapy.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Xiaoye Bi, Dong Xue, Yunpeng Wang, Chencheng Lv, Zexiong Li, Tao Zhao
Summary: This research aimed to develop a durable and formaldehyde-free flame retardant treatment for cotton fabrics. The results demonstrated successful grafting of phosphorous acid (PA) onto cotton fabrics, leading to enhanced flame resistance while maintaining the desired fabric characteristics.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Ruolin Wang, Wenjuan Sun, Haisheng Han, Dongping Tao
Summary: This study finds that Al-starch colloidal depressants can effectively inhibit the flotation of ultrafine calcite and chlorite, and increase the grade of valuable minerals. The chemisorption of Al-starch on mineral surface changes the functional group peaks and generates new O-Al functional groups.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Wondimu K. Wakejo, Ali Maged, Beteley T. Meshesha, Joon W. Kang, Abayneh G. Demesa, Sandip Chakrabarti, Thallada Bhaskar, Ashok Kumar Gupta, Amit Bhatnagar
Summary: Simultaneously removing different pharmaceutical pollutants from wastewater is an important environmental issue, and the use of a system that can remove multiple contaminants at once is necessary. Functionalized biochar (FBC) has been found to be effective in simultaneously removing acetaminophen and ciprofloxacin and other pharmaceutical pollutants.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Yu Wang, Fengwen Yan, Jie Wu, Zhijun Huang, Liuting Song, Shunda Yuan
Summary: In this study, Cu single atoms are anchored on the external surface of g-C3N4 nanofibers to maximize atom utilization. This catalyst exhibits excellent Fenton-like catalytic activity and good stability due to the full utilization of Cu active sites.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)