Article
Chemistry, Physical
Bernard P. Binks, Badri Vishal
Summary: The area of oil foams has received little academic attention until the last decade, but interest has grown recently, fueled in part by advances in the general area of colloidal particles at fluid interfaces. There is increasing research on the use of solid particles as foaming agents for oil foams, particularly in relation to the food industry.
ADVANCES IN COLLOID AND INTERFACE SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Omotola Okesanjo, J. Carson Meredith, Sven H. Behrens
Summary: Capillary foams are aqueous foams stabilized by the synergistic action of colloidal particles and a small amount of oil, with unique foam architecture offering opportunities for engineering new foam-related materials and processes. The understanding of structure-property relations is still in its infancy, with particle wettability, particle volume fraction, and oil-to-particle ratio playing key roles in determining the structure and properties of the foams.
Article
Chemistry, Multidisciplinary
Yuchen Si, Tao Li, Paul S. Clegg
Summary: This paper describes an experimental technique for producing foams composed of bubbles in a balanced aqueous and oil phase. By mixing two highly stable foams, a well-mixed and dry final foam can be obtained.
Review
Polymer Science
Yong Ye, Li Guo, Tingjun Zhong
Summary: Polymer-stabilized liquid crystals (PSLCs) are versatile materials with polymer networks providing anchoring energy for liquid crystals. This review details various improvements in PSLCs, including polymer-stabilized nematic, cholesteric, blue phase, smectic, ferroelectric, and antiferroelectric liquid crystals. PSLCs offer multiple functionalities, such as reorientation in smart windows and manual tuning of reflection bandwidth in broadband reflectors. PSBPLCs open up new possibilities for displays, modulators, sensors, lasers, lenses, and photonics applications. Polymer networks in PSFLCs or PSAFLCs enhance grayscale memories for flexible displays and energy-saving smart cards. The remaining challenges and research opportunities in PSLCs are also discussed.
Article
Materials Science, Multidisciplinary
Svenja Marl, Annette Rueppel, Michael Hartung, Kevin Klier, Ralf-Urs Giesen, Hans-Peter Heim
Summary: Foamed molded parts made of LSR are rare due to the process reliability of LSR foam injection molding not being guaranteed. Injection molding can achieve density reductions and hardness changes in LSR foam materials.
ADVANCED ENGINEERING MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Roozbeh Abidnejad, Marco Beaumont, Blaise L. Tardy, Bruno D. Mattos, Orlando J. Rojas
Summary: The study introduces a synergetic combination of colloids to stabilize complex fluids at the interface, which is beneficial for preparing lightweight materials; the strong interactions between high aspect ratio and hydrophilic fibrillated cellulose (CNF) with low aspect ratio hydrophobic particles can significantly increase foamability and extend the foam lifetime; the formation of a fibrillar network by CNF in wet foam regulates interparticle interactions, delaying or preventing drainage, coarsening, and bubble coalescence, leading to the transformation into lightweight and strong architectures after drying.
Article
Chemistry, Physical
Yu Liu, Bernard P. Binks
Summary: The study found that rapidly cooling foam at high temperature can increase foam stability, and demonstrated that the crystallization of surfactants in the foam is beneficial for enhancing foam stability.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Engineering, Chemical
Omotola Okesanjo, J. Carson Meredith, Sven Holger Behrens
Summary: This study investigates the stability and influencing factors of capillary foams in flow, and finds that the particle network structure determines the stability of the foams, and shear force can increase the network strength and stability of the foams.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
Shi Zhang, Dmytro Dedovets, Andong Feng, Kang Wang, Marc Pera-Titus
Summary: Oil foams stabilized by surface-active catalytic particles bearing fluorinated chains and Pd nanoparticles enable fast and efficient aerobic oxidation of various alcohols. The stability of the foam greatly affects the catalytic performance, and the particles can be conveniently recycled.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Chemistry, Physical
Vineet Kumar, Aboozar Nasrollahi, Heung-Shik Park, Sung Tae Shin, Myong-Hoon Lee, Shin-Woong Kang
Summary: A high-quality alignment of liquid crystals (LCs) has been achieved through the synthesis of a photoresponsive azo-polyimide with different substitution ratios of azo-dye, in combination with in situ photoalignment and UV polymerization. The results show that the tilt angle of LCs varies with dose of linearly polarized visible light (LPVL) irradiation and concentration of reactive mesogen (RM). Surface investigations reveal contrasting nature between planar and vertically aligned substrates before and after RM stabilization.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Nanoscience & Nanotechnology
S. Bhogi, V. Pamidi, J. Nampoothiri, K. R. Ravi, M. Mukherjee
Summary: This study compared the foaming behavior of in-situ 6061-2MgAl2O4 composites processed by ultrasonic treatment and conventional route. The results showed that foams produced using the ultrasonically-treated composite exhibited superior structure and microstructural strength, resulting in higher compressive strength and energy absorption.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Engineering, Environmental
Huawen Liu, Wentao Zhai, Chul B. Park
Summary: Ultra-light hydrophobic plastic foams with aligned channel structures have been fabricated using an organic solvent freeze casting strategy, which exhibit excellent liquid absorption performance and can be used for oil absorption in aqueous environments.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Multidisciplinary Sciences
Ashish Jayaraman, Carlos M. Baez-Cotto, Tyler J. Mann, Mahesh K. Mahanthappa
Summary: The addition of water to a mixture of an ionic surfactant and n-decane was found to induce the formation of aqueous lyotropic dodecagonal quasicrystals, which exhibit local 12-fold rotational symmetry and no long-range translational order. The formation of these quasicrystals is sensitive to the mixing order of molecular constituents and sample thermal history, with different conditions leading to the formation of only periodic structures. These findings suggest that molecular complexity is not always required for the formation of aperiodic supramolecular order.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Materials Science, Multidisciplinary
Akshay Devikar, Dipak Bhosale, K. Georgy, Manas Mukherjee, G. S. Vinod Kumar
Summary: This study investigated the influence of beryllium (Be) addition on the stability of Mg alloy foam for the first time. The addition of Be significantly increased foam expansion and improved their structure. XPS analysis confirmed the presence of BeO at the gas-solid interface of Mg foam, which stabilized the foam by forming a smooth and crack-free surface.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2022)
Review
Polymer Science
Ehsan Rostami-Tapeh-Esmaeil, Ali Vahidifar, Elnaz Esmizadeh, Denis Rodrigue
Summary: This review focuses on the preparation and applications of rubber foams, discussing the impact of formulation and processing parameters on their properties, compiling and comparing the relevant research results.
