Article
Multidisciplinary Sciences
Aleksandra Svalova, David Walshaw, Clement Lee, Vasily Demyanov, Nicholas G. Parker, Megan J. Povey, Geoffrey D. Abbott
Summary: Bayesian inference and ultrasonic velocity were used to estimate the self-association concentration of asphaltenes in toluene, revealing that a lower abundance of longer side-chains can lead to earlier self-association of asphaltenes.
SCIENTIFIC REPORTS
(2021)
Article
Chemistry, Physical
David J. Barlow
Summary: Surfactants are widely used in various industries such as household cleaning, personal care, and cosmetics. However, most of the surfactants currently in use are derived from fossil fuels and are environmentally unfriendly and toxic. Therefore, there is a need for greener alternatives. The determination of the critical micelle concentration of surfactants is crucial for their development as analytical tools and commercial materials. A fast and cost-effective method using dried drop coffee ring image analysis is proposed for determining the surfactant critical micelle concentration.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Chemistry, Physical
Dongxiang Li, Xing Qian, Changshuo Lian, Rui Huang, Ziyi Hao, Ming Cheng, Shuping Li, Chunfang Li, Shahid Iqbal, Lianjie Qin, Jikuan Zhao
Summary: This study developed three samples of carbon quantum dots (CQDs) with different fluorescence properties as fluorescent probes for the critical micelle concentration (CMC) determination of surfactants. The CMC values were deduced from the fluorescence intensity change and the Stokes shift variation. The study also found that the interaction between CQDs and surfactant molecules is complicated and the CQDs are located at the palisade layer in the surfactant micelles.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Chemistry, Physical
Farzaneh Hajirasouliha, Hua Yang, Qiang Wu, Dominika Zabiegaj
Summary: This study compared the critical micelle concentration (CMC) of two ionic surfactants using optical fiber and drop profile analysis tensiometry (PAT) techniques, showing preliminary consistency between the two methods. However, differences were observed in the behavior of the two surfactants in optical fiber measurement.
ZEITSCHRIFT FUR PHYSIKALISCHE CHEMIE-INTERNATIONAL JOURNAL OF RESEARCH IN PHYSICAL CHEMISTRY & CHEMICAL PHYSICS
(2021)
Article
Chemistry, Physical
Siam Hussain, Sheng-Hsiang Hung, Ruey-Yug Tsay, Shi-Yow Lin
Summary: This study investigated the evaporation process of partially dissociated ionic surfactant DTAB and confirmed the feasibility of using contact angle data to determine the critical micelle concentration. It was also found that the movement of a solution drop's triple line during evaporation is primarily dependent on the localized surface morphology.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Engineering, Environmental
Jared Church, Marjorie R. Willner, Brittany R. Renfro, Yun Chen, Daniela Diaz, Woo Hyoung Lee, Cari S. Dutcher, Jeffrey G. Lundin, Danielle M. Paynter
Summary: The study investigated the relationship between emulsion stability in shipboard bilgewater and critical micelle concentration in the presence of oil (CMCIFT), finding that CMCIFT was most closely related to emulsion stability. It was observed that emulsions with surfactant concentrations below CMCIFT exhibited oil separation, regardless of homogenization intensities and oil concentrations.
JOURNAL OF WATER PROCESS ENGINEERING
(2021)
Article
Chemistry, Physical
Ivan Plastinin, Sergey A. Burikov, Tatiana A. Dolenko
Summary: This study investigated the influence of the size and shape of reverse micelles in water/AOT-Naicyclohexane microemulsions on the vibrational spectral characteristics using Raman laser spectroscopy and dynamic light scattering. The sensitivity of OH and SO spectral bands to the self-organization of surfactants in microemulsions was established, proposing a method to determine the size of reverse micelles with high accuracy. The developed method is applicable to microemulsions with different compositions.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Chemistry, Physical
Johan Larsson, Anna E. Leung, Christian Lang, Baohu Wu, Marie Wahlgren, Tommy Nylander, Stefan Ulvenlund, Adrian Sanchez-Fernandez
Summary: The self-assembly of long-tail surfactants can form nanoscale structures that alter the rheology of the system, but this process is affected by the high Krafft temperature. A novel sugar-based surfactant with an unsaturated C16-tail was synthesized, showing the ability to form a stable micellar solution over a wide temperature range, creating a non-Newtonian, viscoelastic fluid. These findings have implications for the development of sustainable formulated products with remarkable thermal resilience.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Review
Chemistry, Physical
Urmila Saha, Ranjit De, Bijan Das
Summary: The efficacy of drugs is often challenged by issues such as premature degradation, low solubility, side effects, and rapid clearance from the circulatory system. Surfactants play a pivotal role in solubilizing a wide variety of drug molecules through micellization in physiologically relevant fluids. They offer advantages over conventional liposomes and phospholipid-based formulations, including higher micellar stability, ease of formation, and lower maintenance expenses. This review critically analyzes the interactions between loaded drugs and surfactants in micellar delivery systems, highlighting the need for a better understanding of these interactions.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Spectroscopy
Lucia Becherova, Vadym Prokopec, Jitka Cejkova
Summary: This study focuses on investigating micellization-induced liquid-liquid fluctuations in NaD aqueous solutions through vibrational spectroscopic analysis and determination of CMC. The addition of decanol and changes in basic parameters from the perspective of CMC were monitored. The results were supported by multiple spectroscopic techniques.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2021)
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
Polymer Science
Dawei Zhang, Zhongxi Chen, Lu Ren, Xiangchun Meng, Wenge Gu
Summary: Through analyzing the properties of ASP produced water in Daqing Oilfield, it was found that the critical micelle concentration of ASP produced water is greatly affected by pH and slightly affected by temperature. The addition of polymer increases the viscosity of produced water and enhances its stability. The presence of inorganic salts promotes the formation of surfactant micelles in ASP produced water, further enhancing its stability.
Article
Chemistry, Applied
Tina Raeisi Gahrooee, Aref Abbasi Moud, Marziyeh Danesh, Savvas G. Hatzikiriakos
Summary: This study investigates the network structure and rheological behavior of Cellulose Nanocrystal (CNC) suspension in the presence of cetyltrimethylammonium bromide (CTAB) both below and above the critical micelle concentration (CMC). Through TEM imaging and rheological characterization, it was found that CNC-CTAB gels exhibit shear thinning behavior, with a complex relationship between strain amplitudes and CTAB concentration affecting the network structure and performance.
CARBOHYDRATE POLYMERS
(2021)
Article
Physics, Multidisciplinary
Monica Corea, Rogelio Jimenez-Juarez, Gabriela Martinez-Mejia, Maria de Jesus Martinez-Ortiz, Jose Manuel del Rio
Summary: The study experimentally analyzed the influence of the stock solution concentration on the geometrical characteristics of the titration curve, and found that the magnitude and shape of the heat titration depend on the stock solution concentration until reaching a limiting value. Qualitative analysis suggested that the limiting value is substance-dependent.
Article
Chemistry, Multidisciplinary
Kayla D. Thompson, Evan P. Danielson, Kerri N. Peterson, Nicholas O. Nocevski, Jason T. Boock, Jason A. Berberich
Summary: Understanding the interactions between surfactants and proteins is crucial for consumer product formulation and emulsion/foam development. This study found that DDAO has minimal impact on beta LG below its CMC, but induces protein unfolding at concentrations above the CMC.