Academic literature on the topic 'Dual layer membranes'

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Journal articles on the topic "Dual layer membranes"

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Boztepe, Inci, Stephen Gray, Jianhua Zhang, and Jun-De Li. "Performance modelling of direct contact membrane distillation using a hydrophobic/hydrophilic dual-layer membrane." Journal of Water Reuse and Desalination 11, no. 3 (2021): 490–507. http://dx.doi.org/10.2166/wrd.2021.072.

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Abstract HFP-co-PVDF/N6 hydrophobic/hydrophilic dual-layer membrane was used to study desalination with direct contact membrane distillation (DCMD). A one-dimensional (1-D) model was proposed to predict the flux and thermal efficiency. Heat and mass transfer equations were solved numerically for the combined hydrophilic and hydrophobic layers. The membrane characteristics of the hydrophobic layer were considered for the calculation of the mass transfer coefficients, while the hydrophilic layer was ignored since it was assumed to be filled with water. However, the hydrophilic layer was taken in
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Grünig, Lara, Ulrich A. Handge, Joachim Koll, et al. "Hydrophilic Dual Layer Hollow Fiber Membranes for Ultrafiltration." Membranes 10, no. 7 (2020): 143. http://dx.doi.org/10.3390/membranes10070143.

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In this study, a triblock copolymer was used as additive to fabricate new dual layer hollow fiber membranes with a hydrophilic active inner surface in order to improve their fouling resistance. The polymeric components of the solutions for membrane fabrication were poly(ether sulfone), poly(N-vinyl pyrrolidone), and the triblock copolymer. The additive consists of three blocks: a middle hydrophobic poly(ether sulfone) block and two outer hydrophilic alkyl poly(ethylene glycol) blocks. By varying the additive concentration in the solutions, it was possible to fabricate dual layer hollow fiber m
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Wojciechowski, Cezary, Monika Wasyłeczko, Dorota Lewińska, and Andrzej Chwojnowski. "A Comprehensive Review of Hollow-Fiber Membrane Fabrication Methods across Biomedical, Biotechnological, and Environmental Domains." Molecules 29, no. 11 (2024): 2637. http://dx.doi.org/10.3390/molecules29112637.

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This work presents methods of obtaining polymeric hollow-fiber membranes produced via the dry–wet phase inversion method that were published in renowned specialized membrane publications in the years 2010–2020. Obtaining hollow-fiber membranes, unlike flat membranes, requires the use of a special installation for their production, the most important component of which is the hollow fiber forming spinneret. This method is most often used in obtaining membranes made of polysulfone, polyethersulfone, polyurethane, cellulose acetate, and its derivatives. Many factors affect the properties of the m
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Jang, Kyunghoon, Thanh-Tin Nguyen, Eunsung Yi, Chang Seong Kim, Soo Wan Kim, and In S. Kim. "Open Pore Ultrafiltration Hollow Fiber Membrane Fabrication Method via Dual Pore Former with Dual Dope Solution Phase." Membranes 12, no. 11 (2022): 1140. http://dx.doi.org/10.3390/membranes12111140.

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Hollow-fiber membranes are widely used in various fields of membrane processes because of their numerous properties, e.g., large surface area, high packing density, mass production with uniform quality, obvious end-of-life indicators, and so on. However, it is difficult to control the pores and internal properties of hollow-fiber membranes due to their inherent structure: a hollow inside surrounded by a wall membrane. Herein, we aimed to control pores and the internal structure of hollow-fiber membranes by fabricating a dual layer using a dual nozzle. Two different pore formers, polyethylene g
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Vatani, M., A. Raisi, and G. Pazuki. "Pervaporation separation of ethyl acetate from aqueous solutions using ZSM-5 filled dual-layer poly(ether-block-amide)/polyethersulfone membrane." RSC Advances 8, no. 9 (2018): 4713–25. http://dx.doi.org/10.1039/c7ra13382k.

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Dual-layer mixed matrix membranes were prepared by incorporating ZSM-5 zeolite into PEBA as an active layer on the PES membrane as a support layer for pervaporation separation of EAc from the EAc/water mixtures.
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Tsai, Chung-Yi, Siu-Yue Tam, Yunfeng Lu, and C. Jeffrey Brinker. "Dual-layer asymmetric microporous silica membranes." Journal of Membrane Science 169, no. 2 (2000): 255–68. http://dx.doi.org/10.1016/s0376-7388(99)00343-9.

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Kim, Jihyeon, Jinwon Lee, Lindsey B. Bezek, Bumjin Park, and Kwan-Soo Lee. "Use of Nucleating Agent NA11 in the Preparation of Polyvinylidene Fluoride Dual-Layer Hollow Fiber Membranes." Membranes 13, no. 1 (2023): 75. http://dx.doi.org/10.3390/membranes13010075.

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Polyvinylidene fluoride (PVDF) dual-layer hollow fiber membranes were simultaneously fabricated by thermally induced phase separation (TIPS) and non-solvent induced phase separation (NIPS) methods using a triple orifice spinneret (TOS) for water treatment application. The support layer was prepared from a TIPS dope solution, which was composed of PVDF, gamma-butyrolactone (GBL), and N-methyl-2-pyrrolidone (NMP). The coating layer was prepared from a NIPS dope solution, which was composed of PVDF, N,N-dimethylacetamide (DMAc), and polyvinylpyrrolidone (PVP). In order to improve the mechanical s
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Shi, Huyan, Lixin Xue, Ailin Gao, and Qingbo Zhou. "Dual layer hollow fiber PVDF ultra-filtration membranes containing Ag nano-particle loaded zeolite with longer term anti-bacterial capacity in salt water." Water Science and Technology 73, no. 9 (2016): 2159–67. http://dx.doi.org/10.2166/wst.2016.062.

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Dual layer polyvinylidene fluoride (PVDF), antibacterial, hollow fiber, ultra-filtration composite membranes with antibacterial particles (silver (Ag) nano-particles loaded zeolite (Z-Ag)) in the outer layer were prepared with high water flux and desired pore sizes. The amounts of Ag+ released from the composite membranes, freshly made and stored in water and salt solution, were measured. The result indicated that dual layer PVDF antibacterial hollow fiber containing Z-Ag (M-1-Ag) still possessed the ability of continuous release of Ag+ even after exposure to water with high ionic content, sho
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Park, Sung-Joon, Won-Gi Ahn, Wansuk Choi, et al. "A facile and scalable fabrication method for thin film composite reverse osmosis membranes: dual-layer slot coating." Journal of Materials Chemistry A 5, no. 14 (2017): 6648–55. http://dx.doi.org/10.1039/c7ta00891k.

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Karim, Syed Shujaat, Sarah Farrukh, Arshad Hussain, Tayyaba Noor, and Mohammad Younas. "A comprehensive overview of dual-layer composite membrane for air (O2/N2) separation." Polymers and Polymer Composites 29, no. 9_suppl (2021): S1630—S1640. http://dx.doi.org/10.1177/09673911211045852.

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The separation of air (O2/N2) via a polymeric membrane has recently piqued the interest of academic researcher as well as the industrial sector. Because of its remarkable characteristics, the polymeric membrane has emerged as one of the innovative and fast growing technology. However, two major problems faced by membrane technology, which hinder its growth in the commercial sector are, 1): The trade-off between permeability and selectivity. 2): Maintaining physical and chemical structural stability in a long-term commercial scale process. Recent advancements in membrane material, structural, a
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Dissertations / Theses on the topic "Dual layer membranes"

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Husain, Shabbir. "Mixed Matrix Dual Layer Hollow Fiber Membranes For Natural Gas Separation." Diss., Georgia Institute of Technology, 2006. http://hdl.handle.net/1853/16178.

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Mixed matrix membranes offer an attractive route to the development of high performance and efficiency membranes required for demanding gas separations. Such membranes combine the advantageous processing characteristics of polymers with the excellent separation productivity and efficiency of molecular sieving materials. This research explores the development of mixed matrix membranes, namely in the form of asymmetric hollow fiber membranes using zeolites as the molecular sieving phase and commercially available high performance polymers as the continuous matrix. Lack of adhesion between th
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Wu, Zhentao. "Dual-layer functional ceramic hollow fibre membranes for partial oxidation of methane." Thesis, Imperial College London, 2012. http://hdl.handle.net/10044/1/9858.

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Due to the unique mechanism of oxygen permeation through dense ceramic membranes with the mixed ionic-electronic conducting property, these membranes have been widely studied for oxygen separation. It has been several decades since the use of a dense ceramic membrane reactor for methane conversion was proposed. One of the major reasons for persistent worldwide research efforts to develop such dense ceramic membrane reactors is the advantages that result from combining oxygen separation and catalytic reactions within a single unit. Besides the significant progress that has been made to date, mo
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Boztepe, Inci. "Examination of Hydrophobic/Hydrophilic Dual Layer Membranes for Membrane Distillation." Thesis, 2018. https://vuir.vu.edu.au/40253/.

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Membrane Distillation (MD) is a separation technology that uses a temperature difference across a membrane to purify water. Membrane distillation has been known since the early 1960s and there are still breakthroughs to be made. Improvements in the module design or new membranes materials, such as composite membranes, are being investigated, and much research has focused on these aspects. This study focused on membrane distillation performance for direct contact membrane distillation with 5 different membranes, which included 3 hydrophobic and 2 hydrophobic/hydrophilic dual layer membranes. T
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Book chapters on the topic "Dual layer membranes"

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Liu, Mei-Ling, Zheng-Jun Fu, and Shi-Peng Sun. "Hollow fiber spinning of dual-layer membranes." In Hollow Fiber Membranes. Elsevier, 2021. http://dx.doi.org/10.1016/b978-0-12-821876-1.00015-9.

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Zuo, Jian, Kang-Jia Lu, and Peng Wang. "Dual-Layer and Multibore Membranes for Membrane Distillation." In Membrane Distillation. CRC Press, 2019. http://dx.doi.org/10.1201/9780429287879-6.

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Ong, Yee Kang, and Tai-Shung Chung. "High performance dual-layer hollow fiber fabricated via novel immiscibility-induced phase separation (I2PS) process for dehydration of ethanol." In Hollow Fiber Membranes. Elsevier, 2021. http://dx.doi.org/10.1016/b978-0-12-821876-1.00008-1.

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El Dakkony, Saly R., Mahmoud F. Mubarak, and Adel A. H. Abdel-Rahman. "Nanocellulose-based Membranes for Water Purification: Multifunctional Nanocellulose Extraction, Characterization, Modification Strategies, and Current Release in Water Treatment and Environmental Remediation." In Novel Materials and Water Purification. Royal Society of Chemistry, 2024. http://dx.doi.org/10.1039/9781837671663-00101.

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The environment is a top priority in the 21st century. Much research has focused on renewable water desalination membranes and eco-friendly, sustainable materials from natural sources are being studied more due to their recyclability, biodegradability, compatibility, and benign behavior. Due to its availability, green credentials, and glucose residue chains, nanocellulose (NC) is a potential cellulose-based water-filtering material. NC is a promising sustainable nanomaterial due to its unique structure. Researchers are interested in NC-based green composites because they are lightweight, low c
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Conference papers on the topic "Dual layer membranes"

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Bigante, Severino, John G. Johnson, and William H. Julius. "Comparison of Material Costs between Dual Laminate Fiberglass Reinforced Plastic vs. Acid Resistant Brick Lined Steel." In CORROSION 2000. NACE International, 2000. https://doi.org/10.5006/c2000-00549.

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Abstract Process equipment must be fabricated from materials that can resist chemical and thermal degradation. This paper will include material costs for dual laminate construction with fiberglass reinforced plastic (FRP) as the structural layer lined with a thermoplastic sheet such as polyvinyl chloride (PVC), chlorinated polyvinyl chloride (CPVC), polypropylene (PP), ethylene-chlorotrifluoroethylene copolymer (ECTFE), polyvinyl fluoride (PVDF), fluorinated ethylene propylene (FEP), and perfluoroalalkoxy (PFA). The material costs will be compared to the cost of materials used in acid brick sh
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Diler, Erwan, Nicolas Larche, Jean Vittonato, et al. "Cathodic Protection Shielding and Prevention of the Corrosion under Disbonded Coating in Soils." In CONFERENCE 2023. AMPP, 2023. https://doi.org/10.5006/c2023-19248.

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Abstract Cathodic protection shielding of pipeline coatings is largely debated among coatings specialists. Under disbonded coating with or without electrolyte renewal, the amount of current passing through is the key of the protection. In this study, the shielding character of field coatings, such as single and dual layers FBE and liquid epoxy was assessed. Different thicknesses were investigated from 350 to 1000 μm. An experimental setup was designed to assess the ability of a disbonded coating to allow the CP currents to protect the steel underneath. Conditions at low and high oxygen content
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Edwie, Felinia, May May Teoh, and Tai-Shung Chung. "Dual-layer Hydrophobic-hydrophilic PVDF Hollow Fiber Membranes for Continuous Membrane Distillation Operation." In 14th Asia Pacific Confederation of Chemical Engineering Congress. Research Publishing Services, 2012. http://dx.doi.org/10.3850/978-981-07-1445-1_683.

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Azzam, R. M. A., and F. A. Mahmoud. "Tilted Bilayer Membranes as Wave Retardation Plates." In Optical Interference Coatings. Optica Publishing Group, 1995. http://dx.doi.org/10.1364/oic.1995.thc6.

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Coherent multiple-beam interference in a tilted parallel-plane thin dielectic slab leads to a differential transmission phase shift Δt between the p and s linear polarizations, hence such a slab (of an optically isotropic material) acts as the simplest possible nondeviating retardation plate1. However, a fundamental limitation of this basic device is that quarter-wave retardation (QWR), i.e., Δt = 90°, is not attainable using a single uncoated slab. Here it is shown that this limitation is lifted if the slab is coated with a thin film of transparent material of different refractive index. All
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Sajidah, Happy Bunga Nasyirahul, Silvana Dwi Nurherdiana, Wahyu Prasetyo Utomo, et al. "Preparation and characterization of dual-layer hollow fibre catalyst membrane for oxygen transport." In THE 3RD INTERNATIONAL SEMINAR ON CHEMISTRY: Green Chemistry and its Role for Sustainability. Author(s), 2018. http://dx.doi.org/10.1063/1.5082495.

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Alkarbouly, Sura, and Basma Waisi. "Dual-layer Antifouling Membrane of Electrospun PAN: PMMA Nonwoven Nanofibers for Oily Wastewater Treatment." In Proceedings of 2nd International Multi-Disciplinary Conference Theme: Integrated Sciences and Technologies, IMDC-IST 2021, 7-9 September 2021, Sakarya, Turkey. EAI, 2022. http://dx.doi.org/10.4108/eai.7-9-2021.2314932.

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Shin, Buhyun, Youngshik Kim, and Wan-Chin Kim. "Dual Axes Scanning Micro Mirror Using Electromagnetic Actuators and Elastic Compliant Membrane." In ASME 2023 32nd Conference on Information Storage and Processing Systems. American Society of Mechanical Engineers, 2023. http://dx.doi.org/10.1115/isps2023-110712.

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Abstract Micromirror has many applications including vision systems, optical networking, and laser projects. Most of them are operated on a resonant mode for high-speed scan operation, but there are large demands for statically controlled mirrors with large deflection. In this paper, we propose a dual-axes scanning micromirror for large deflection, which also has the advantages of wide frequency bandwidth and low manufacturing cost. To achieve large deflection, we design and develop a customized electromagnetic actuator as a driving mechanism, which is composed of one permanent magnet and four
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Liu, Yuchen, Xin Liu, Xin Cai, Aimin Du, and Rui Lin. "Effective Pt-Based N-Doped Carbon Nanosphere Electro-Catalyst for the Application in PEMFC." In WCX SAE World Congress Experience. SAE International, 2025. https://doi.org/10.4271/2025-01-8551.

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<div class="section abstract"><div class="htmlview paragraph">With the growing energy crisis, people urgently need green energy sources to replace fossil ones. As a zero-emission clean energy source, the proton-exchange membrane fuel cell (PEMFC) has received growing attention from researchers due to its broad practical application. However, the large-scale application of PEMFC is currently impeded by their unsatisfying power output and high cost. PEMFC is composed of multiple components, among which the catalyst layer significantly affects the output power and cost of PEMFC. Drast
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Wöhner, Timo, Ben R. Whiteside, Guido Tosello, Hans Nørgaard Hansen, and Aminul Islam. "Influence of Process Temperatures on Blister Creation in Micro Film Insert Molding of a Dual Layer Membrane." In 4M/IWMF2016 The Global Conference on Micro Manufacture : Incorporating the 11th International Conference on Multi-Material Micro Manufacture (4M) and the 10th International Workshop on Microfactories (IWMF). Research Publishing Services, 2016. http://dx.doi.org/10.3850/978-981-11-0749-8_715.

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Zulkifli, W. N. A. A. W., N. F. Q. Amran, A. A. Fauzi, F. Arith, and A. S. M. Shah. "Study on effect of dual-layer Polyvinylidene Fluoride nanofiber membrane towards quasi-solid state dyesensitized solar cell's characteristics." In Engineering Technology International Conference (ETIC 2022). Institution of Engineering and Technology, 2022. http://dx.doi.org/10.1049/icp.2022.2601.

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