Article
Biochemistry & Molecular Biology
Guoqiang Li, Wojciech Kujawski, Katarzyna Knozowska, Joanna Kujawa
Summary: CO2 separation from flue gas based on membrane technology has received significant attention in recent decades. In this study, PEI hollow fibers were fabricated using a dry-jet-wet spinning technique and then coated with a PDMS selective layer to prepare composite membranes. Various spinning conditions of the hollow fibers were characterized, and it was found that factors such as dope concentration, bore fluid flow rate, and bore fluid composition significantly influenced the gas permeance and ideal selectivity of the PDMS/PEI composite membrane.
Article
Polymer Science
Jisu Kim, U. Pramod Kumar, Sung-Jun Lee, Chang-Lae Kim, Jeong-Won Lee
Summary: Modifying surface wettability has been widely practiced in engineering for functional purposes. This study focuses on the fabrication and characterization of fluorine-free superhydrophobic coatings using varying ratios of PDMS and toluene. The results showed that the coating's roughness, wettability, and durability can be controlled by viscosity and surface structure. Furthermore, the superhydrophobic coatings exhibited great durability in saline solutions, but degradation was observed in acidic and alkaline solutions.
Review
Polymer Science
A. P. Ashika, Amrita Nighojkar, Alsha Subash, Balasubramanian Kandasubramanian
Summary: Hydrogen, as a clean fuel, can reduce the greenhouse gas emissions caused by burning coal fuels and crude oil, which accounts for 97% of all fuel sources. However, storing hydrogen gas in gas cylinders is expensive and impractical. Polymers, with their low cost and ability to adsorb hydrogen, can play a crucial role in efficiently utilizing hydrogen as a fuel in membranes, sieves, and microporous organic frameworks for clean energy generation. This review discusses the different architectures of polymers, their physicochemical traits, preparation methods, and the prospects of commercial utility.
EUROPEAN POLYMER JOURNAL
(2023)
Article
Engineering, Chemical
Mikayla D. Armstrong, Riley Vickers, Orlando Coronell
Summary: The primary goal of designing reverse osmosis membranes is to improve water-solute selectivity and water permeance. However, using simplifying assumptions in calculating transport properties may introduce errors and affect conclusions about membrane performance. This study quantified the errors associated with simplifying assumptions and showed that they can significantly affect water permeance, solute permeance, and selectivity results, especially at low and high pressures. The study emphasizes the importance of standardizing test conditions for accurate evaluation of membrane performance.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Polymer Science
Prakash B. Kalahal, Ashok M. Sajjan, T. M. Yunus Khan, Ali A. Rajhi, Sharanappa Achappa, Nagaraj R. Banapurmath, M. Ashwini, Alaauldeen A. Duhduh
Summary: Polyelectrolyte complex membranes were prepared by varying the gelatin content in sodium carboxymethyl cellulose matrix. The membranes showed good pervaporation characteristics for water-bioethanol mixtures, with the highest flux and selectivity observed in membranes with 15% gelatin content.
Article
Engineering, Electrical & Electronic
M. Zhang, J. Shi, S. P. Beeby
Summary: This paper presents approaches to enhance the surface charge density and stability of a PDMS based ferroelectret device by adding Polytetrafluoroethylene (PTFE) to the PDMS. The proportion of PTFE powder and PDMS was found to significantly improve the piezoelectric properties of the ferroelectret. The ferroelectret also showed potential as an energy harvester and pressure sensor.
SENSORS AND ACTUATORS A-PHYSICAL
(2023)
Article
Chemistry, Multidisciplinary
Yujing Tong, Hongjun Liu, Sheng Dai, De-en Jiang
Summary: Researchers have discovered a new type of monolayer covalent fullerene network that shows promising potential as a high-permeance, selective hydrogen separation membrane. These membranes have the best pore size match, a unique funnel-shaped pore, and entropic selectivity, making them ideal for separating H-2 from larger gases such as CO2 and O-2. With excellent hydrogen permeance and high selectivity, these ultrathin membranes surpass the 2008 Robeson upper bounds by a large margin.
Article
Polymer Science
Guoqiang Li, Katarzyna Knozowska, Joanna Kujawa, Andrius Tonkonogovas, Arunas Stankevicius, Wojciech Kujawski
Summary: In this study, PDMS/PEI hollow-fiber membranes were prepared using the dip-coating method and characterized for gas separation performance. It was found that the concentration of PDMS solution and coating time significantly affected the thickness of the thin layer and gas permeance. Results showed that as the coating time and PDMS solution concentration increased, the thickness of the PDMS layer and silicon content in the selective layer also increased.
Article
Engineering, Chemical
Laura L. Trinkies, Andrea Duell, Jinju Zhang, Sebastian Urban, Benedikt J. Deschner, Manfred Kraut, Bradley P. Ladewig, Andreas Weltin, Jochen Kieninger, Roland Dittmeyer
Summary: Microstructured membrane reactors provide a promising approach to address productivity and safety challenges in direct hydrogen peroxide synthesis. Various mass transport processes occur in this complex system, with experimental investigation into saturation and desaturation behaviors of the liquid reaction medium with gaseous reactants. The study also looks at the permeances of the PDMS membrane to hydrogen and oxygen at different pressures, using mathematical modeling to simulate the results and highlighting the need for constant gas channel flushing for safety reasons.
CHEMICAL ENGINEERING SCIENCE
(2022)
Article
Engineering, Chemical
Siyan Wang, Zhenggong Wang, Shouwen Zhu, Shuqi Liu, Feng Zhang, Jian Jin
Summary: Membranes with high stability and selectivity are needed for efficient chemical separations in harsh solvents. In this study, a thin-film composite polyamide membrane for organic solvent nanofiltration (OSN) was fabricated using an adamantane diamine as a building block. The bulky adamantane structure inhibited polymer chain packing, creating interconnected micropores in the polyamide layer. The membrane exhibited high methanol permeance and retention of organic dye molecules, as well as stability in different organic solvents. This approach improves membrane permeability and solvent resistance without compromising selectivity.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Review
Green & Sustainable Science & Technology
S. Nithin Mithra, S. S. Ahankari
Summary: Membrane technology is widely used in biogas purification, and nanocellulose-based membranes show great advantages in CO2 separation. This paper systematically reviews the feasibility of using nanocellulose-based membranes for facilitated CO2 separation from biogas, discussing the importance of carriers in facilitated transport membranes and the impact of various variables on membrane performance.
MATERIALS TODAY SUSTAINABILITY
(2022)
Article
Biophysics
Huanhuan Li, Wenhui Geng, Zhixiong Qi, Waqas Ahmad, Quansheng Chen
Summary: A stimuli-responsive SERS biosensor was developed for tetracycline detection using EDTA-driven polyethyleneimine grafted calcium carbonate microcapsules and chitosan-Fe magnetic microbeads. The biosensor showed high sensitivity and stability, with a linear relationship established and a LOD of 0.03 ng/mL. The biosensor's application in detecting tetracycline in food matrices was also validated and yielded consistent results with the standard ELISA method. This SERS biosensor offers promising prospects for tetracycline detection.
BIOSENSORS & BIOELECTRONICS
(2023)
Article
Chemistry, Physical
Chun Shen, Hu Qiu, Wanlin Guo
Summary: The nano-porous graphene membrane can break through the Robeson upper bound with high hydrogen permeance and ultrahigh hydrogen/nitrogen selectivity, making it a competitive candidate for hydrogen/nitrogen gas separation.
Article
Chemistry, Applied
Qinwen Zheng, Jian Lv, Jing Zhang, Jie Feng
Summary: This paper introduces a research on an ice-free coating, which successfully improves the anti-icing performance of the coating by modifying its composition and structure, providing a strong support for the running of high-speed trains in winter or the electric power system that requires resistance to freezing rain.
PROGRESS IN ORGANIC COATINGS
(2021)
Article
Engineering, Chemical
Rafael C. A. Amarante, Adam A. Donaldson
Summary: Experimental results showed that higher feed composition and temperatures lead to higher ethanol fluxes, but increasing ethanol feed concentration has an inversely proportional effect on selectivity and separation factor.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Review
Chemistry, Multidisciplinary
Ali Kargari, Sheida Rezaeinia
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2020)
Article
Chemistry, Multidisciplinary
Amin Dehban, Ali Kargari, Farzin Zokaee Ashtiani
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2020)
Article
Engineering, Environmental
Edris Tohidian, Farzin Zokaee Ashtiani, Ali Kargari
JOURNAL OF WATER PROCESS ENGINEERING
(2020)
Article
Engineering, Chemical
Ali Sallakh Niknejad, Saeed Bazgir, Ali Kargari
Summary: A novel method for fabricating triple-layer membranes has been proposed, showing enhanced surface hydrophobicity, improved liquid entry pressure and tensile strength. The membranes exhibited excellent salt rejection and permeate flux, making them a promising option for desalination processes using direct contact membrane distillation (DCMD).
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
Article
Engineering, Chemical
Edris Tohidian, Amin Dehban, Farzin Zokaee Ashtiani, Ali Kargari
Summary: A two-layer polyetherimide ultrafiltration membrane was fabricated using a double-blade casting technique and showed higher flux and improved resistance when used for separation of the toluene-water emulsion. Results indicated that the two-layer membranes had better performance in terms of flux and chemical stability compared to single-layer membranes.
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2021)
Article
Engineering, Chemical
Ali Sallakh Niknejad, Saeed Bazgir, Ali Kargari, Masoud Barani, Esmaeil Ranjbari, Mohsen Rasouli
Summary: High-flux composite MD membranes were successfully fabricated using electroblowing and hot-pressing techniques, achieving high permeate flux and high salt rejection rates, addressing the pore wetting and low permeation challenges in the MD process.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Construction & Building Technology
Fatemeh Oshani, Ali Allahverdi, Ali Kargari, Niyaz Mohammad Mahmoodi
Summary: In this study, metakaolin-based geopolymer was obtained by activating metakaolin with an alkali activator containing silica fume and sodium hydroxide. The addition of silica fume and adjustment of Na2O/Al2O3 molar ratio resulted in the formation of geopolymer-zeolite composites, which exhibited higher compressive strength. The presence of large zeolite crystals in the geopolymer matrix was observed in the composite with 10 wt% silica fume and a Na2O/Al2O3 molar ratio of 1. The maximum compressive strength was achieved at 15 wt% silica fume, Na2O/Al2O3 molar ratio of 1, and curing temperature of 70 degrees C.
JOURNAL OF BUILDING ENGINEERING
(2022)
Article
Green & Sustainable Science & Technology
Omolbanin Hosseinkhani, Ali Kargari
Summary: In hot and humid regions, water recycling and purification are essential for obtaining high-quality drinking water. A membrane-based hybrid system was used to treat condensates from air conditioning units, and the effects of trans-membrane pressure and feed flow rate on the target parameters were investigated. The results showed that the system can achieve a complete reduction of various contaminants and recover more than 97% of the feed water.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Green & Sustainable Science & Technology
Ali Zare Shahrabadi, Ali Kargari, Atousa Tayebi
Summary: The addition of nanoclay to PPSU significantly increases CO2 permeability while having little impact on CO2/CH4 selectivity, or even a slight decrease. Solubility selectivity is increased, while diffusivity selectivity is decreased, indicating the formation of an intercalated morphology.
INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL
(2022)
Review
Engineering, Chemical
Sahar Zare, Ali Kargari
Summary: Foulant build-up and polarization on membrane surfaces limit the application of membranes in industries. Various strategies, including surface patterning, have been proposed to reduce polarization and fouling. This paper reviews the state-of-the-art surface patterned membranes and discusses the methods for their fabrication and their performance enhancements. The future prospects of this technology are also forecasted.
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2023)
Review
Chemistry, Multidisciplinary
Maliheh Mehrabian, Ali Kargari
Summary: This review paper investigates the current application of bio-based polymeric membranes in the fabrication of nonporous membranes. It evaluates the performance of different membrane constituents and explores key performance indices for benchmarking. The review provides an overview of the potential and progress of bio-based polymeric membranes and highlights future trends.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2023)
Article
Chemistry, Physical
Mohammad Amin Alaei Shahmirzadi, Ali Kargari, Takeshi Matsuura
Summary: Inspired by the Tai Chi philosophy, a dual-network ionogel was synthesized by adjusting the inorganic and organic features. The ionogel exhibited high ionic liquid loading (up to 82%) and desirable mechanical and thermal properties. It also showed excellent transport properties in propylene/propane separation.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Materials Science, Characterization & Testing
Atousa Tayebi, Ali Kargari, Somaye Akbari
Summary: This study fabricated novel dense membranes by blending Pebax with PAMAM and evaluated their application in CO2/CH4 gas separation. The results showed that PAMAM loading, operating pressure, and temperature significantly affected gas permeability and CO2/CH4 selectivity. Gas permeability in the membranes was primarily governed by gas solubility rather than diffusivity. Modifying Pebax membrane with PAMAM improved separation performance with minimal aging and good stability.
Review
Energy & Fuels
Atefeh Roozitalab, Fatemeh Hamidavi, Ali Kargari
Summary: Methane, the main gaseous fuel, can be obtained from natural gas or biogas. Upgrading these gases by separating impurities like CO2, N2, H2S, O2, CO, NH3, H2O, and heavier hydrocarbons is important. Membrane separation technology is an attractive method for upgrading, and 6FDA-based polyimides and PIM membranes with mixed matrix (MOFs, zeolites, and POFs) have shown the best performance. However, polymeric membranes are susceptible to chemical and physical changes due to CO2 plasticizing effect, which can be prevented by crosslinking and heat annealing.
GAS SCIENCE AND ENGINEERING
(2023)
Article
Engineering, Environmental
Behnam Ghalami Choobar, Mohammad Amin Alaei Shahmirzadi, Ali Kargari, Massoumeh Manouchehri
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2019)
