Article
Chemistry, Physical
Tsukasa Morita, Shiho Yada, Tomokazu Yoshimura
Summary: The dynamic surface tensions of gemini surfactants and trimeric surfactants were measured to analyze the effects of molecular structures and surfactant concentration. It was found that gemini surfactants with cyclic structures exhibited slower interfacial adsorption, while trimeric surfactants had lower adsorption rate due to their bulkiness. The diffusion rate of trimeric surfactants increased with the spacer chain length, while linear-type surfactants adsorbed faster and star-type surfactants adsorbed slower at the air/water interface.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Chemistry, Physical
Ravan A. Rahimov, Gulnara A. Ahmadova, Khuraman A. Huseynova, Rustam Kh Mammadov, Nahida Z. Asadova, Yusif Abdullayev, Minavar J. Ibrahimova, Atash Gurbanov, Fedor Zubkov
Summary: New cationic ionic liquid surfactants based on alkyl bromides and N-2-hydroxypropyl piperidine were synthesized and their colloidal parameters and antimicrobial properties were studied.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Chemistry, Physical
Joshua A. Mysona, Alon V. McCormick, David C. Morse
Summary: This study analyzes the dynamic adsorption of surfactant from a micellar solution to a rapidly created surface. The model considers the adsorption of surfactant monomers, rather than micelles, on the surface. The results show the formation of a micelle-free region near the interface, which expands over time. The system reaches a state of full local equilibrium in the final stage.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Chemistry, Physical
Li Zhang, Chun Ling Hao, Xiao Ming Jiang
Summary: We report a Gemini surfactant based on azobenzene (GAS) that selectively adsorbs onto the silica surface and approximately half of the adsorbed surfactants tend to detach from the surface under UV irradiation. The adsorption/desorption of the surfactant on the surface can be reversibly adjusted using visible or UV light alternately. The study investigates the effect of light irradiation on the surfactant's performances and proposes a two-step adsorption mechanism on the surface based on the results of quartz-crystal microbalance with dissipation monitoring (QCM-D).
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Chemistry, Multidisciplinary
Mengsu Peng, Timothy T. Duignan, Cuong Nguyen, Anh Nguyen
Summary: Surfactants play a central role in various scientific and engineering fields, but understanding their behavior at the air-water interface still presents challenges. Research focuses on accurately describing the adsorption layer thickness of surfactants in this area. The modified Poisson-Boltzmann model has been developed to address the effects of surfactants at the air-water interface, with remaining challenges and future research directions also discussed.
Article
Thermodynamics
Yunpeng Yang, Haolan Tan, Jiaqing Zhang, Fengju Shang, Fei Xiao, Kaiyuan Li
Summary: This study systematically investigated the surface activity and foam performance of mixed solutions of short-chain fluorocarbon Gemini surfactant (Gemini) with anionic, zwitterionic, and non-ionic hydrocarbon surfactants. The results demonstrated that Gemini exhibited excellent surface activity and foam properties. The combination of Gemini with three ionic hydrocarbon surfactants showed a synergistic effect, and increasing the concentration of Gemini improved foam performance. Gemini enhanced foam performance by enhancing the alignment of surface adsorbed molecules at the liquid-air interface. Among the mixed systems, Gemini/SDS exhibited the highest foam stability.
THERMAL SCIENCE AND ENGINEERING PROGRESS
(2023)
Article
Chemistry, Physical
Ravan A. Rahimov, Gulnara A. Ahmadova, Khuraman A. Huseynova, Sevda A. Muradova, Rustam Kh Mammadov, Inara Rustamova, Fatma Qasimova, Fedor Zubkov
Summary: New ionic-liquid cationic surfactants were synthesized and their surface activity and antimicrobial properties were studied, based on alkyl bromides and 1-(4-morpholinyl)-2-propanol.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Engineering, Chemical
Haifeng Tang, Jiamei Song, Mengling Zha, Jincheng He, Zhihu Yan
Summary: In this study, the structure-activity relationship between the molecular structure of Gemini surfactants and foam properties was clarified for the first time. The research results show that Gemini surfactants with sulfonic acid head group have excellent foam properties. Additionally, foam properties increase with the increase of hydrophobic tail chain length and decrease with the increase of spacer group length.
Article
Chemistry, Physical
Norio Saito, Sekito Itoyama, Rieko Takahashi, Yutaka Takahashi, Yukishige Kondo
Summary: This study investigated hybrid surfactants containing alkyl and fluoroalkyl chains, finding them to be superhydrophobic and capable of switching surface activity with an external light source. Experiments showed that compositions with octyl-fluorocarbon chains exhibited higher surface tension variation, indicating promising applications.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
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
Chemistry, Physical
Zhihu Yan, Yanju Wu, Min Zhao, Li Yu, Shibo Zhang
Summary: Gemini surfactants with different hydrophobic tails and spacer groups were designed and synthesized in this study. The structures were verified by 1H NMR spectrum and mass spectrometry. The research discussed the modulation of micellar thermodynamics and surface activity by the molecular structure, and demonstrated the cost-effective evaluation of surface activity using the molecular polarity index (MPI).
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Chemistry, Physical
Shubham Tiwari, Sadanandam Namsani, Jayant K. Singh
Summary: This study systematically investigates the combined effect of ionic surfactants and inorganic salts on interfacial properties using experiments, theoretical models, and molecular dynamics simulations. The results reveal increased surfactant packing and decreased surface tension at the air-liquid interface in the presence of salt.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Chemistry, Physical
Malik Abdul Rub, Mohmad Shafi Sheikh, Farah Khan, Naved Azum, Yousef G. Alghamdi, Abdullah M. Asiri
Summary: The study shows synergism between PMT and 16-E-2-16 in various media, with mixed micelles formation enhancing solubility and permeability for drug delivery purposes across the membrane.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Chemistry, Applied
Hiroki Matsubara, Xiaolei Xu, Akira Bochi, Makoto Aratono
Summary: In this study, the adsorption dynamics of mixed aqueous solutions were investigated using sessile bubble surface tensiometry. Different oscillation patterns of surface tension were observed when one surfactant was added to the solution of another surfactant, and this behavior can be explained by the theory of adsorption kinetics of polymer solutions.
JOURNAL OF OLEO SCIENCE
(2023)
Article
Chemistry, Applied
Ravan A. Rahimov, Gulnara A. Ahmadova, Seyid-Zeynab F. Hashimzade, Elmar Imanov, Hajibala G. Khasiyev, Nazani K. Karimova, Fedor I. Zubkov
Summary: Two new classes of gemini cationic surfactants have been synthesized and their aggregation properties in aqueous solution were investigated. These surfactants were found to start forming aggregates at concentrations well below their critical micelle concentrations (CMC), and the effect of the number of isopropylol groups on micelle sizes was explored using dynamic light scattering (DLS) technique. Additionally, the obtained gemini cationic surfactants showed biocidal character.
JOURNAL OF SURFACTANTS AND DETERGENTS
(2021)
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)