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Cigane U, Palevicius A, Jurenas V, Pilkauskas K, Janusas G. Development and Analysis of Electrochemical Reactor with Vibrating Functional Element for AAO Nanoporous Membranes Fabrication. SENSORS (BASEL, SWITZERLAND) 2022; 22:8856. [PMID: 36433453 PMCID: PMC9695578 DOI: 10.3390/s22228856] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Revised: 11/11/2022] [Accepted: 11/14/2022] [Indexed: 06/16/2023]
Abstract
Nanoporous anodic aluminum oxide (AAO) is needed for a variety of purposes due to its unique properties, including high hardness, thermal stability, large surface area, and light weight. Nevertheless, the use of AAO in different applications is limited because of its brittleness. A new design of an electrochemical reactor with a vibrating element for AAO nanoporous membranes fabrication is proposed. The vibrating element in the form of a piezoceramic ring was installed inside the developed reactor, which allows to create a high-frequency excitation. Furthermore, mixing and vibration simulations in the novel reactor were carried out using ANSYS 17 and COMSOL Multiphysics 5.4 software, respectively. By theoretical calculations, the possibility to excite the vibrations of five resonant modes at different frequencies in the AAO membrane was shown. The theoretical results were experimentally confirmed. Five vibration modes at close to the theoretical frequencies were obtained in the novel reactor. Moreover, nanoporous AAO membranes were synthesized. The novel aluminum anodization technology results in AAO membranes with 82.6 ± 10 nm pore diameters and 43% porosity at 3.1 kHz frequency excitation and AAO membranes with 86.1 ± 10 nm pore diameters and 46% porosity at 4.1 kHz frequency excitation. Furthermore, the chemical composition of the membrane remained unchanged, and the hardness decreased. Nanoporous AAO has become less brittle but hard enough to be used for template synthesis.
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Affiliation(s)
- Urte Cigane
- Faculty of Mechanical Engineering and Design, Kaunas University of Technology, Studentu Str. 56, 51424 Kaunas, Lithuania
| | - Arvydas Palevicius
- Faculty of Mechanical Engineering and Design, Kaunas University of Technology, Studentu Str. 56, 51424 Kaunas, Lithuania
| | - Vytautas Jurenas
- Institute of Mechatronics, Kaunas University of Technology, Studentu Str. 56, 51424 Kaunas, Lithuania
| | - Kestutis Pilkauskas
- Faculty of Mechanical Engineering and Design, Kaunas University of Technology, Studentu Str. 56, 51424 Kaunas, Lithuania
| | - Giedrius Janusas
- Faculty of Mechanical Engineering and Design, Kaunas University of Technology, Studentu Str. 56, 51424 Kaunas, Lithuania
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One-step sintering for anti-fouling piezoelectric α-quartz and thin layer of alumina membrane. J Memb Sci 2022. [DOI: 10.1016/j.memsci.2022.121188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Zhao Y, Gu Y, Liu B, Yan Y, Shan C, Guo J, Zhang S, Vecitis CD, Gao G. Pulsed hydraulic-pressure-responsive self-cleaning membrane. Nature 2022; 608:69-73. [PMID: 35922500 DOI: 10.1038/s41586-022-04942-4] [Citation(s) in RCA: 22] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Accepted: 06/07/2022] [Indexed: 11/09/2022]
Abstract
Pressure-driven membranes is a widely used separation technology in a range of industries, such as water purification, bioprocessing, food processing and chemical production1,2. Despite their numerous advantages, such as modular design and minimal footprint, inevitable membrane fouling is the key challenge in most practical applications3. Fouling limits membrane performance by reducing permeate flux or increasing pressure requirements, which results in higher energetic operation and maintenance costs4-7. Here we report a hydraulic-pressure-responsive membrane (PiezoMem) to transform pressure pulses into electroactive responses for in situ self-cleaning. A transient hydraulic pressure fluctuation across the membrane results in generation of current pulses and rapid voltage oscillations (peak, +5.0/-3.2 V) capable of foulant degradation and repulsion without the need for supplementary chemical cleaning agents, secondary waste disposal or further external stimuli3,8-13. PiezoMem showed broad-spectrum antifouling action towards a range of membrane foulants, including organic molecules, oil droplets, proteins, bacteria and inorganic colloids, through reactive oxygen species (ROS) production and dielectrophoretic repulsion.
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Affiliation(s)
- Yang Zhao
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing, China
| | - Yuna Gu
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing, China
| | - Bin Liu
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing, China
| | - Yujie Yan
- National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, China
| | - Chao Shan
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing, China.,Research Center for Environmental Nanotechnology (ReCENT), Nanjing University, Nanjing, China
| | - Jian Guo
- National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, China
| | - Shantao Zhang
- National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, China
| | - Chad D Vecitis
- Harvard John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, USA
| | - Guandao Gao
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing, China. .,Research Center for Environmental Nanotechnology (ReCENT), Nanjing University, Nanjing, China.
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Tan Z, Chen S, Mao X, Lv H, Wang Y, Ye X. Antifouling BaTiO 3/PVDF piezoelectric membrane for ultrafiltration of oily bilge water. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2022; 85:2980-2992. [PMID: 35638800 DOI: 10.2166/wst.2022.154] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Barium titanate/polyvinylidene fluoride (BaTiO3/PVDF) piezoelectric membrane was successfully prepared and generated in-situ vibrations to reduce membrane fouling by applying alternating current (AC) signal for oily bilge water ultrafiltration. The effect of in-situ vibration on membrane fouling was investigated through changing in the excitation alternating voltage and its frequency, pH, crossflow rate. The results indicated that the piezoelectric membrane by applying AC signal remarkably alleviated the membrane fouling for bilge water ultrafiltration. The membrane fouling decreased with increasing the AC signal voltage. The final steady-state permeate flux from the piezoelectric membrane for bilge water ultrafiltration increased with the AC signal voltage, raising it by up to 63.4% at AC signal voltage of 20 V compared to that of the membrane without applying AC voltage. The high permeate flux was obtained at the resonant frequency of 220 kHz. During the 50-h ultrafiltration of bilge water with the piezoelectric membrane excited at 220 kHz and 15 V, the permeate flux from the membrane was stable. The oil concentration in outflow from the piezoelectric membrane was below 14 ppm, which met the discharged level required by IMO convention. The total organic carbon removal rate in bilge water was over 94%.
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Affiliation(s)
- Zhirong Tan
- School of Navigation, Wuhan University of Technology, Wuhan 430063, PR China; Hubei Key Laboratory of Inland Shiping Technology, Wuhan 430063, PR China
| | - Shuiping Chen
- School of Resource & Environmental Engineering, Wuhan University of Technology, Wuhan 430070, PR China E-mail:
| | - Xin Mao
- School of Navigation, Wuhan University of Technology, Wuhan 430063, PR China; Hubei Key Laboratory of Inland Shiping Technology, Wuhan 430063, PR China
| | - Heng Lv
- School of Resource & Environmental Engineering, Wuhan University of Technology, Wuhan 430070, PR China E-mail:
| | - Yong Wang
- School of the Environment, Nanjing University, NanJing 210023, PR China
| | - Xiaoqing Ye
- School of Navigation, Wuhan University of Technology, Wuhan 430063, PR China; Hubei Key Laboratory of Inland Shiping Technology, Wuhan 430063, PR China
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Ryndzionek R, Sienkiewicz Ł. A review of recent advances in the single- and multi-degree-of-freedom ultrasonic piezoelectric motors. ULTRASONICS 2021; 116:106471. [PMID: 34091199 DOI: 10.1016/j.ultras.2021.106471] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/23/2020] [Revised: 05/17/2021] [Accepted: 05/17/2021] [Indexed: 05/28/2023]
Abstract
In this paper a comprehensive review of recent studies on the ultrasonic piezoelectric motors is presented. The authors focus on research articles published in the last five years mostly. The primary subject of this investigation is the development of piezoelectric ultrasonic motors including analytical, numerical and experimental analysis. In further sections, classification methods of piezoelectric motors, survey criteria and three main groups of ultrasonic piezoelectric motors with examples have been presented and described. Finally, the conclusions and future research perspectives have been proposed.
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Affiliation(s)
- Roland Ryndzionek
- Gdansk University of Technology, Faculty Of Electrical And Control Engineering, Gdansk, Poland.
| | - Łukasz Sienkiewicz
- Gdansk University of Technology, Faculty Of Electrical And Control Engineering, Gdansk, Poland.
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