Review
Chemistry, Physical
Shiva Mohammadi-Jam, Kristian E. Waters, Richard W. Greenwood
Summary: This article reviews the use of the electroacoustic technique in determining the zeta potential of concentrated aqueous suspensions and emphasizes the importance of identifying the isoelectric points for colloidal stability and processing. The application of the technique in polymer lattices is also summarized.
ADVANCES IN COLLOID AND INTERFACE SCIENCE
(2022)
Article
Engineering, Mechanical
Amer Alizadeh, Yunfan Huang, Fanli Liu, Hirofumi Daiguji, Moran Wang
Summary: Surface charging plays a crucial role in the stability of immiscible liquid-liquid interfaces, surfactant adsorption, drug delivery, and mineral flotation. This study presents an alternative experimental method using a streaming potential setup. A Y-Y shaped microchannel with a polymer-coated inner wall was employed to establish a flat and stable liquid-liquid interface. The method was successfully verified by investigating the charging of aqueous solution-silicon surface. The proposed method offers simplicity and flexibility for studying liquid-liquid interface charging mechanisms and inspiring quantitative macroscopic interfacial modeling.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Chemistry, Multidisciplinary
Huiyuan Wu, Shaoke Fu, Wencong He, Chuncai Shan, Jian Wang, Yan Du, Shihe Du, Bangxing Li, Chenguo Hu
Summary: This study reports a fast surface charge injection technique based on air breakdown effect, which allows for directional accumulation of charge and improves the output performance of triboelectric nanogenerator. A novel charge transfer mechanism is proposed, and a method for quantifying surface charge density is given.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Engineering, Chemical
Pavel Apel, Stanislaw Koter, Andriy Yaroshchuk
Summary: The performance and energy conversion of charged nanoporous membranes are influenced by their surface-charge density. Traditional methods to determine the surface-charge density rely on measuring streaming potential, which is challenging for nanoporous membranes in dilute electrolyte solutions. This study introduces a new approach that allows for the simultaneous determination of multiple membrane transport properties, providing a more accurate assessment of the surface-charge density.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Fan Lei, Siming Chen, Haoyang Sun, He Han, Junlong Yang, Jintao Huang, Dandan Li, Dazhi Sun
Summary: This study demonstrates that the concentration of TBA(+)OH(-) has a significant impact on the surface wetting and light transmission performance of the coatings, with higher concentrations leading to better results. The intercalation of more TBA(+) ions into ZrP interlayers results in exfoliated nanoplatelets that can cover the entire glass substrate, contributing to the high transparency and superhydrophilic properties of the coatings.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Multidisciplinary Sciences
Hyang Mi Lee, Yong Woo Kim, Eun Min Go, Chetan Revadekar, Kyu Hwan Choi, Yumi Cho, Sang Kyu Kwak, Bum Jun Park
Summary: Lee et al. design a like-charged colloidal model and characterize the Debye interaction for the first time at the water-oil interface. The Debye interaction plays an important role in self-assembling processes in materials.
NATURE COMMUNICATIONS
(2023)
Article
Nanoscience & Nanotechnology
Penghao Zhang, Chenguo Yao, Liang Yu, Yingjiang He, Shoulong Dong
Summary: The primary challenge for high-voltage semiconductor modules above 10 kV is insufficient surface insulation margin. This study proposes a solution by using tailored coating deposition with colliding plasma jets to inhibit surface charge accumulation and optimize local electric field. The results show that this approach significantly increases the surface flashover voltages of polymer packaging materials while reducing leakage loss.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Nanoscience & Nanotechnology
Huaze Wu, Takeshi Ueno, Kosuke Nozaki, Huichuan Xu, Yuki Nakano, Peng Chen, Noriyuki Wakabayashi
Summary: This study utilized anodization as a novel approach to immobilize lithium ions on a titanium surface and evaluated the changes in surface characteristics. The results showed that the surface charge characteristics were enhanced on the 3V-anodized surface, leading to increased adsorption of extracellular matrix proteins and improved attachment of osteoblast cells. This study suggests that anodization could be an effective method to promote osseointegration by modifying the surface charge characteristics and allowing for enhanced biological adhesion.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Philippe Leroy, Alexis Maineult, Shuai Li, Jan Vinogradov
Summary: This study found that slightly moving the shear plane closer to the mineral surface can significantly improve the predictions of the zeta potential and surface charge density at high salinity conditions, with important implications for modeling the electrochemical properties of minerals in contact with highly saline solutions.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Nanoscience & Nanotechnology
Hiroyuki Kono, Yoichiro Sogame, Uugan-Erdene Purevdorj, Makoto Ogata, Kenji Tajima
Summary: Nanofibrillated bacterial cellulose (NFBC) was modified with an aqueous alkaline solution of 2,3-epoxypropyltrimethylammonium chloride (EPTMAC) to confer it with antimicrobial properties. The modified NFBC showed similar fiber morphologies and crystal structures to pristine NFBC, indicating that EPTMAC selectively reacted with the surface hydroxyl groups of NFBC. The modified nanofibers demonstrated antibacterial activity against Klebsiella pneumoniae, likely due to the positive charge on the surface of the modified NFBC.
ACS APPLIED NANO MATERIALS
(2023)
Article
Engineering, Chemical
Hao-yu Guo, Xiao-qi Gao, Kai-chang Yu, Xiao-mao Wang, Shu-ming Liu
Summary: In this study, the characteristics and mechanisms of ion adsorption on a typical negatively charged nanofiltration (NF) membrane surface were investigated. The results showed that cation adsorption followed the Langmuir isotherm and was primarily of Coulomb force origin. Additionally, divalent cations such as Ca2+ and Mg2+ adsorbed more easily than monovalent cations such as Na+. The study also found no significant difference between the adsorption of Ca2+ and Mg2+, as well as between two common types of acidic functional groups on the membrane surface. These mechanisms of ion adsorption can help explain the rejection behaviors observed in NF membranes.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Chemistry, Physical
Yuting Zhao, Tonghui Hao, Wei Wu, Yuan Meng, Xianwu Cao, Qunchao Zhang, Wei She, Jun You, Dean Shi, Tao Jiang
Summary: This work demonstrates an eco-friendly and robust superhydrophobic coating based on siloxane-modified hyperbranched waterborne polyurethane (Si-HBPU) and fluorinated silica nanoparticles (F-SiO2). The coating shows excellent water repellency and mechanical robustness, and is capable of maintaining superhydrophobicity even after sandpaper abrasion. Additionally, it exhibits outstanding anti-icing/deicing performance and scratch resistance, anti-fouling, and anti-corrosion properties.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
Vladimir D. Sobolev, Anatoly N. Filippov, Victor M. Starov
Summary: In the measurements of membranes with high porosity and permeability, it is necessary to introduce a correction that accounts for the influence of fluid flow and charge transfer inside the membrane. Equations for modified zeta potential calculations were derived for both streaming potential and streaming current measurements considering flow and charge transfer inside the membrane.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Engineering, Chemical
Tianrun Gu, Runnan Zhang, Shiyu Zhang, Benbing Shi, Junhui Zhao, Zhen Wang, Mengying Long, Guangzhe Wang, Ting Qiu, Zhongyi Jiang
Summary: In this study, a positively selective layer for Li+/Mg2+ separation was successfully constructed on the surface of a polyamide nanofiltration membrane through modification, leading to significantly increased membrane surface charge density and high performance in Li+/Mg2+ separation.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Multidisciplinary Sciences
Veronica Bastos, Parastu Oskoei, Elina Andresen, Maysoon Saleh, Bastian Ruehle, Ute Resch-Genger, Helena Oliveira
Summary: This study investigated the transformations and potential toxicity of UCNPs under physiological conditions, demonstrating the importance of surface chemistry in their stability, dissolution behavior, and cytotoxicity. The results highlight the biocompatibility of certain surface modifications and the protective role of a sufficiently thick silica shell in preventing UCNP dissolution and release of cytotoxic ions.
SCIENTIFIC REPORTS
(2022)