Review
Chemistry, Multidisciplinary
Majid Vafaeezadeh, Werner R. Thiel
Summary: This review systematically covers recent and significant achievements in the application of task-specific Janus nanomaterials as heterogeneous catalysts in various types of chemical reactions, and provides an outlook on possible future applications.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Multidisciplinary
Chaoping Li, Jintao Hu, Cheng Tang, Zewei Liu, Xia Li, Sijie Liu, Rong Tan
Summary: In this study, a thermo-switchable Pickering emulsion was developed for temperature-controlled catalysis. Thermoresponsive Janus silica nanosheets (JNSs) with a poly(N-isopropylacrylamide) brush on one side and a chiral salen TiIV complex on the other side were prepared. The JNSs exhibited temperature-sensitive wettability switching behaviors, allowing for reversible emulsification and demulsification. The smart JNSs enabled accelerated asymmetric sulfoxidation in water, followed by quick in situ-demulsification for complete separation upon heating.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Chemistry, Applied
Haifeng Tong, Juan Wang, Liang Qi, Qunyu Gao
Summary: Janus particles (J-OSPs) based on chitosan nanoparticles (CSNPs) and octadecenyl succinic anhydride starch (OSPs) were synthesized using Pickering emulsion method and electrostatic interaction. J-OSPs exhibited various asymmetric structures and their surface characteristics were altered, making them superior in terms of emulsion stability by enhancing hydrophobicity and adjusting surface charges.
CARBOHYDRATE POLYMERS
(2023)
Article
Chemistry, Physical
Bin Lyu, Xinru Li, Hui Liu, Dangge Gao, Jianzhong Ma, Mengyu Zhang
Summary: Amphiphilic Janus particles were used to prepare a stable composite emulsion with fluorine-containing polyacrylate, leading to greatly improved hydrophobicity of fabric. The synergistic effect of amphiphilic Janus SiO2 nanoparticles and hexafluorobutyl methacrylate significantly enhanced water resistance of the latex film, with a conversion rate of 98.7% and an average particle size of 500 nm achieved.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Construction & Building Technology
Zhaolin Li, Junjie Yuan
Summary: This study reports the preparation of phase change microcapsules (PCMs) with high encapsulation efficiency using Janus silica particles (JSPs) as stabilizers in combination with Pickering emulsion and suspension polymerization methods. The morphologies and particle sizes of the PCMs can be well controlled, with encapsulation efficiency reaching as high as 99.6%. The PCM remains stable at 150 degrees C and exhibits excellent thermal reliability and durability after 7560 phase change cycles.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Chemistry, Physical
Bo Pang, Huan Liu, Kai Zhang
Summary: This article reviews recent advances in Pickering emulsions stabilized by polysaccharides-based micro/nanoparticles and the construction of functional materials from these emulsions. It discusses the effects of micro/nanoparticles properties on the characteristics of the Pickering emulsions and their applications, as well as the obstacles and prospects for the future development of polysaccharides-based micro/nanoparticles and Pickering emulsions in practical applications.
ADVANCES IN COLLOID AND INTERFACE SCIENCE
(2021)
Article
Chemistry, Physical
Chaoping Li, Su Liu, Yibing Pi, Jingwen Feng, Zewei Liu, Shiye Li, Rong Tan
Summary: The use of IL-functionalized amphiphilic Janus mesosilica nanosheets, prepared by decorating JNS with IL linker, allows for highly enantioselective sulfoxidation in water, providing highly accessible reaction interfaces.
JOURNAL OF CATALYSIS
(2021)
Article
Chemistry, Multidisciplinary
Chenyang Wang, Shujuan Ma, Yinmao Wei, Junjie Ou
Summary: The study focuses on the use of cationic surfactant hexadecyl trimethyl ammonium bromide and co-surfactant octadecylamine to improve the stability of Pickering emulsions and arrange micron-sized silica particles at the toluene-water interface through electrostatic interaction. Organosilane reagents are also added to construct asymmetric hydrophilic or hydrophobic mesoporous onto the silica particles surface. The cation surfactant-assisted Pickering emulsion method is simple and effective, making it applicable for the synthesis of dual Janus silica particles for specific applications.
Article
Polymer Science
Mengnan Li, Xiuli Li, Chunyu Li, Hongchen Liu, Wenxiang Wang, Liangjiu Bai, Hou Chen, Lixia Yang
Summary: Janus nanomaterials play an important role as functional nanocomposites due to their asymmetric structure and different components on the same surface. In this study, SiO2@PDA/PMAUPy JNs were successfully prepared and further applied to create dual self-healing hydrogels with preferable mechanical properties and excellent healing ratio, showing potential for broad applications in smart flexible sensors and biomedical fields.
EUROPEAN POLYMER JOURNAL
(2021)
Article
Chemistry, Physical
Sneha Daradmare, Hag Sung Lee, Tae Seok Seo, Bum Jun Park
Summary: This study demonstrates the synthesis of surfactant-free Janus particles (JPs) using a solvent evaporation-induced phase separation method in a continuous flow system. The composition, fluorescence properties, and interfacial arrangement of the particles were investigated.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Review
Food Science & Technology
Iveta Klojdova, Constantinos Stathopoulos
Summary: Pickering emulsions, stabilized by adsorbed particles, have high potential for application in the food industry. They provide more benefits compared to emulsions stabilized with surfactants, such as lower susceptibility to coalescence and possible encapsulation and controlled release of functional compounds. Additionally, they can be used for fat reduction and encapsulation of sensitive compounds.
Article
Biochemistry & Molecular Biology
Shixin Song, Yufei Li, Qiyuan Zhu, Xin Zhang, Yang Wang, Li Tao, Lei Yu
Summary: In this study, buckwheat protein colloidal particles (BPCPs) were prepared by heat treatment to stabilize the oil-water interface. The results showed that the prepared BPCPs could be used as a novel Pickering emulsifier with certain particle size, surface hydrophobicity, and wettability. The effects of BPCPs concentration, ionic strength, and heat treatment on the structure and properties of Pickering emulsions were investigated.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Review
Chemistry, Multidisciplinary
Lin Ni, Chang Yu, Qianbing Wei, Dongming Liu, Jieshan Qiu
Summary: This review provides a comprehensive summary of the development and catalysis applications of Pickering emulsions. It discusses the explicit mechanism of Pickering emulsions, summarizes the design strategies for amphiphilic emulsion catalysts, and describes the progress of unconventional catalytic reactions in Pickering emulsions. The challenges and future trends for the development of Pickering emulsion catalysis are also outlined.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Review
Chemistry, Medicinal
Fernanda Brito de Carvalho-Guimaraes, Kamila Leal Correa, Tatiane Pereira de Souza, Jesus Rafael Rodriguez Amado, Roseane Maria Ribeiro-Costa, Jose Otavio Carrera Silva-Junior
Summary: This review discusses the characteristics and effects of microparticles in Pickering emulsions, highlighting the advantages of using natural stabilizers such as clay minerals. It provides a theoretical basis for a broader range of emulsion types and explores the main aspects related to stability.
Article
Chemistry, Physical
Weiguang Yang, Mi Zhang, Qiqi Wang, Jiyong Sun, Aixin Song
Summary: A new Pickering emulsion system utilizing surfactant particles as stabilizers responded to external factors such as pH and metal ligands. The system exhibited long-term stability in a wide temperature range and high ionic strength resistance. The reversible transformation between emulsions stabilized by rhamnolipids and Rha-Cu particles could be conveniently manipulated by changing pH or introducing metal ligands, showing potential advantages in application fields requiring convenient transitions between emulsified and demulsified forms.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Chemistry, Inorganic & Nuclear
Mahsa Saberian, Alireza Nezamzadeh-Ejhieh
Summary: CuO was successfully supported on clinoptilolite nanoparticles (NCP) via ion exchange and calcination, forming CuO-NCP photocatalysts. CuO-NCP exhibited enhanced photocatalytic activity towards tetracycline (TC), and the best degradation performance was achieved under optimal conditions (25 ppm TC solution, pH 4.8, and 0.5 g/L catalyst).
SOLID STATE SCIENCES
(2024)