Hierarchical membrane by centrifugal casting and effects of incorporating activated carbon as pore-former |
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| Affiliation: | 1. Laboratory of Membrane Processes (LABSEM), Graduate Program of Food Engineering, Department of Chemical and Food Engineering, Federal University of Santa Catarina (UFSC), Trindade, Florianópolis, Santa Catarina 88040-900, Brazil;2. Laboratory of Biological Engineering (LiEB), Graduate Program of Chemical Engineering, Department of Chemical and Food Engineering, Federal University of Santa Catarina (UFSC), Trindade, Florianópolis, Santa Catarina 88040-900, Brazil;1. College of Materials and Metallurgy, Guizhou University, Guiyang 550025, China;2. School of Metallurgical Engineering, Anhui University of Technology, Ma’anshan 243032, China;3. Institute of Energy, Hefei Comprehensive National Science Centre, Hefei 230041, China;4. The State key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, China;5. College of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China;1. Dispersive Solids Group, Department of Materials and Earth Sciences, Technical University of Darmstadt, 64287, Germany;2. Surface Science Laboratory, Department of Materials and Earth Sciences, Technical University of Darmstadt, 64287 Darmstadt, Germany;3. Advanced Electron Microscopy Division, Department of Materials and Earth Sciences, Technical University of Darmstadt, 64287 Darmstadt, Germany;4. College of Materials, Key Laboratory of High Performance Ceramic Fibers, Xiamen University, Ministry of Education, Xiamen, China;5. College of Materials, Xiamen Key Laboratory of Electronic Ceramic Materials and Devices, Xiamen University, Xiamen, China;6. Fraunhofer IWKS, Department Digitalization of Resources, Brentanostr. 2a, 63755 Alzenau, Germany;1. Institute of Modern Physics, Fudan University, Shanghai, China;2. Department of Materials Science and Engineering, University of Wisconsin-Madison, 1509 University Ave., Madison, WI 53706, USA;1. School of Resources, Environment and Materials, Guangxi University, Nanning, Guangxi 530004, PR China;2. National Engineering Laboratory for Modern Materials Surface Engineering Technology, Institute of New Materials, Guangdong Academy of Sciences, Guangzhou, 510651, PR China;3. Department of Applied Chemistry, Xi’an University of Technology, Xi’an 710048, PR China;1. School of Physics and Microelectronics, Zhengzhou University, Zhengzhou 450052, China;2. Zhengzhou Dahe Village Archaeological Site Park, Zhengzhou 450045, China;3. Henan Provincial Institute of Cultural Relics and Archaeology, Zhengzhou 450004, China;4. Institute of High Energy Physics Chinese Academy of Sciences, Beijing 100039, China |
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| Abstract: | Producing ceramic asymmetric membranes usually requires several steps to prepare macroporous support and then the selective layer deposition. This process is energy and time-consuming, which is expensive. In this sense, the one-step centrifugal casting technique is an interesting alternative. Therefore, this work aimed to prepare ultrafiltration ceramic membranes by the centrifugal casting method, investigating the effect of a pore-forming agent on membrane performance. Different concentrations of activated carbon were used in the alumina suspension, and then the tubes were molded, dried, and sintered. The membranes' shrinkage, morphology, apparent porosity, hydraulic permeance, and BSA protein retention were evaluated to identify the effect of using the pore-forming agent. The membrane prepared without activated carbon rejected 91% of the BSA molecules (66 kDa), indicating its molecular weight cut-off. Using more than 2.5% of activated carbon increased the porosity and hydraulic permeance of the membranes, but at the expense of low BSA retention. |
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| Keywords: | Inorganic membrane α-alumina Asymmetric membrane Pore former agent Ultrafiltration membrane |
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