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Pan X, Pan J, Li Z, Gai W, Dong G, Huang M, Huang L. Preparation of N-MG-modified PVDF-CTFE substrate composite nanofiltration membrane and its selective separation of salt and dye. RSC Adv 2024; 14:11992-12008. [PMID: 38638887 PMCID: PMC11024597 DOI: 10.1039/d4ra00359d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2024] [Accepted: 03/15/2024] [Indexed: 04/20/2024] Open
Abstract
Poly(vinylidene fluoride-co-chlorotrifluoroethylene) (PVDF-CTFE) is considered an ideal membrane material for the treatment of complex environmental water due to its exceptional thermal stability and chemical resistance. Thus, to expand its application in the field of nanofiltration (NF) membranes, in this study, N-methylglucamine (N-MG) was used to hydrophilically modify PVDF-CTFE, overcoming the inherent hydrophobicity of PVDF-CTFE as a porous substrate membrane, which leads to difficulties in controlling the interfacial polymerization (IP) reaction and instability of the separation layer structure. The -OH present in N-MG could replace the C-Cl bond in the CTFE chain segment, thus enabling the hydrophilic graft modification of PVDF-CTFE. The influence of the addition of N-MG on the surface and pore structure, wettability, permeability, ultrafiltration separation, and mechanical properties of the PVDF-CTFE substrate membrane was studied. According to the comparison of the comprehensive capabilities of the prepared porous membranes, the M4 membrane with the addition of 1.5 wt% N-MG exhibited the best hydrophilicity and permeability, indicating that it is a desirable modified membrane for use as an NF substrate membrane. The experiments showed that the rejection of Na2SO4 by the NF membrane was 96.5% and greater than 94.0% for various dyes. In the test using dye/salt mixed solution, this membrane exhibited a good separation selectivity (CR/NaCl = 177.8) and long-term operational stability.
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Affiliation(s)
- Xinyu Pan
- School of Materials Science and Engineering, Shandong University of Technology No. 266 West Xincun Road, Zhangdian District Zibo 255000 China
| | - Jian Pan
- School of Materials Science and Engineering, Shandong University of Technology No. 266 West Xincun Road, Zhangdian District Zibo 255000 China
| | - Zhuoqun Li
- School of Materials Science and Engineering, Shandong University of Technology No. 266 West Xincun Road, Zhangdian District Zibo 255000 China
| | - Wenqiang Gai
- School of Materials Science and Engineering, Shandong University of Technology No. 266 West Xincun Road, Zhangdian District Zibo 255000 China
| | - Guangshun Dong
- School of Materials Science and Engineering, Shandong University of Technology No. 266 West Xincun Road, Zhangdian District Zibo 255000 China
| | - Min Huang
- School of Materials Science and Engineering, Shandong University of Technology No. 266 West Xincun Road, Zhangdian District Zibo 255000 China
| | - Lilan Huang
- School of Materials Science and Engineering, Shandong University of Technology No. 266 West Xincun Road, Zhangdian District Zibo 255000 China
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Augusty AC, Rangkupan R, Klaysom C. Evaluating Post-Treatment Effects on Electrospun Nanofiber as a Support for Polyamide Thin-Film Formation. Polymers (Basel) 2024; 16:713. [PMID: 38475394 DOI: 10.3390/polym16050713] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2024] [Revised: 02/24/2024] [Accepted: 03/01/2024] [Indexed: 03/14/2024] Open
Abstract
Poly(acrylonitrile-co-methyl acrylate) (PAN-co-MA) electrospun nanofiber (ENF) was used as the support for the formation of polyamide (PA) thin films. The ENF support layer was post-treated with heat-pressed treatment followed by NaOH hydrolysis to modify its support characteristics. The influence of heat-pressed conditions and NaOH hydrolysis on the support morphology and porosity, thin-film formation, surface chemistry, and membrane performances were investigated. This study revealed that applying heat-pressing followed by hydrolysis significantly enhances the physicochemical properties of the support material and aids in forming a uniform polyamide (PA) thin selective layer. Heat-pressing effectively densifies the support surface and reduces pore size, which is crucial for the even formation of the PA-selective layer. Additionally, the hydrolysis of the support increases its hydrophilicity and decreases pore size, leading to higher sodium chloride (NaCl) rejection rates and improved water permeance. When compared with membranes that underwent only heat-pressing, those treated with both heat-pressing and hydrolysis exhibited superior separation performance, with NaCl rejection rates rising from 83% to 98% while maintaining water permeance. Moreover, water permeance was further increased by 29% through n-hexane-rinsing post-interfacial polymerization. Thus, this simple yet effective combination of heat-pressing and hydrolysis presents a promising approach for developing high-performance thin-film nanocomposite (TFNC) membranes.
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Affiliation(s)
- Anniza Cornelia Augusty
- Center of Excellence in Particle and Material Processing Technology, Department of Chemical Engineering, Chulalongkorn University, Bangkok 10330, Thailand
| | - Ratthapol Rangkupan
- Metallurgy and Materials Science Research Institute, Chulalongkorn University, Bangkok 10330, Thailand
| | - Chalida Klaysom
- Center of Excellence in Particle and Material Processing Technology, Department of Chemical Engineering, Chulalongkorn University, Bangkok 10330, Thailand
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Fang Y, Zhu CY, Yang HC, Zhang C, Xu ZK. Polyamide nanofiltration membranes by vacuum-assisted interfacial polymerization: Broad universality of Substrate, wide window of monomer concentration and high reproducibility of performance. J Colloid Interface Sci 2024; 655:327-334. [PMID: 37948806 DOI: 10.1016/j.jcis.2023.11.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2023] [Revised: 10/21/2023] [Accepted: 11/01/2023] [Indexed: 11/12/2023]
Abstract
Vacuum assistance is used for filtering solid substances onto porous substrates to create composite membranes typically. However, the potential of this approach has rarely been assessed in facilitating the distribution of liquids within those porous substrates to fabricate composite membranes in typical interfacial polymerization. In this work, we demonstrate the advantages of vacuum-assisted interfacial polymerization (VAIP) in terms of substrate universality, monomer concentration range, and performance reproducibility in the fabrication of polyimide nanofiltration membranes. Aqueous solutions of PIP can be homogeneously distributed by vacuum filtration on diverse microfiltration substrates of polyether sulfone (PES), Nylon-66, polyvinylidene fluoride (PVDF), cellulose acetate (CA), and mixed cellulose esters (MCE), respectively. Interfacial polymerization is then performed on these substrates using different concentrations of piperazine (PIP, 0.0075-0.1000 wt%) and trimoyl chloride (TMC, 0.0112-0.1500 wt%). Remarkably, a uniform and ultra-thin polyamide layer with a thickness of 15 nm can be achieved at an exceptionally low PIP concentration of 0.0250 wt%, exhibits a rejection rate of over 98.8 % for Na2SO4 and a water permeance of 25.8 L·m-2·h-1·bar-1. The membranes with a diameter of 30 cm demonstrate reproducibility in nanofiltration performance and satisfactory long-term stability. This method offers a simple yet effective strategy for regulating the liquid distribution and optimizing interfacial polymerization in fabricating polyamide composite membranes.
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Affiliation(s)
- Yu Fang
- MOE Engineering Center of Separation Membranes and Water Treatment, and Key Lab of Adsorption and Separation Materials & Technologies of Zhejiang Province, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310058, China; The "Belt and Road" Sino-Portugal Joint Lab on Advanced Materials, International Research Center for X Polymers, Zhejiang University, Hangzhou 310058, China
| | - Cheng-Ye Zhu
- MOE Engineering Center of Separation Membranes and Water Treatment, and Key Lab of Adsorption and Separation Materials & Technologies of Zhejiang Province, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310058, China; The "Belt and Road" Sino-Portugal Joint Lab on Advanced Materials, International Research Center for X Polymers, Zhejiang University, Hangzhou 310058, China
| | - Hao-Cheng Yang
- MOE Engineering Center of Separation Membranes and Water Treatment, and Key Lab of Adsorption and Separation Materials & Technologies of Zhejiang Province, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310058, China; The "Belt and Road" Sino-Portugal Joint Lab on Advanced Materials, International Research Center for X Polymers, Zhejiang University, Hangzhou 310058, China.
| | - Chao Zhang
- MOE Engineering Center of Separation Membranes and Water Treatment, and Key Lab of Adsorption and Separation Materials & Technologies of Zhejiang Province, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310058, China; The "Belt and Road" Sino-Portugal Joint Lab on Advanced Materials, International Research Center for X Polymers, Zhejiang University, Hangzhou 310058, China
| | - Zhi-Kang Xu
- MOE Engineering Center of Separation Membranes and Water Treatment, and Key Lab of Adsorption and Separation Materials & Technologies of Zhejiang Province, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310058, China; The "Belt and Road" Sino-Portugal Joint Lab on Advanced Materials, International Research Center for X Polymers, Zhejiang University, Hangzhou 310058, China.
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Xu GR, An ZH, Min-Wang, Ke-Xu, Zhao HL, Liu Q. Polyamide Layer Modulation for PA-TFC Membranes Optimization: Developments, Mechanisms, and Implications. Sep Purif Technol 2023. [DOI: 10.1016/j.seppur.2023.123200] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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Xue YR, Ma ZY, Liu C, Zhu CY, Wu J, Xu ZK. Polyamide Nanofilms Synthesized by a Sequential Process of Blade Coating – Spraying - Interfacial Polymerization toward Reverse Osmosis. Sep Purif Technol 2023. [DOI: 10.1016/j.seppur.2023.123122] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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Zhang Y, Xu P, Chen X, Qiu M, Fan Y. Preparation of high permeance thin-film composite nanofiltration membrane on macroporous ceramic support. J Memb Sci 2022. [DOI: 10.1016/j.memsci.2022.121076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Gou B, Song X, Wu Z, Chen X. Effects of Silicon Dioxide/Graphene Oxide Hybrid Modification on Curing Kinetics of Epoxy Resin. ACS OMEGA 2022; 7:36551-36560. [PMID: 36278034 PMCID: PMC9583634 DOI: 10.1021/acsomega.2c04505] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/17/2022] [Accepted: 09/23/2022] [Indexed: 06/16/2023]
Abstract
In this study, SiO2-grafted graphene oxide (GO-SiO2) was prepared using the oxygen-containing group on the GO surface as the active site of the reaction. The chemical structure, morphology, and particle size of GO and GO-SiO2 were carefully investigated by Fourier transform infrared (FT-IR) spectroscopy, X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), Raman spectroscopy, thermogravimetry, transmission electron microscopy, scanning electron microscopy, and atomic force microscopy, and the results proved that the grafting modification was successful. Furthermore, epoxy (EP)/GO composites were prepared, and the effects of unmodified GO and GO-SiO2 on the curing kinetics of EP were comparatively studied by differential scanning calorimetry (DSC). The results showed that, compared with neat EP and EP/GO, GO-SiO2 significantly reduces the curing temperature of the composites, indicating that GO-SiO2 has a more significant catalytic effect on the curing process of EP. The calculation results of the Kissinger method showed that the curing activation energy of EP/GO-SiO2 is obviously lower than that of EP/GO and neat EP. Results of the Ozawa method showed that the introduction of GO-SiO2 reduces the curing activation energy during the whole curing process, and in the middle and late stages of curing (α = 0.5-1) can significantly reduce the curing activation energy. The related mechanism has been proposed.
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Jia X, Cheng Q, Tang T, Xia M, Zhou F, Wu Y, Cheng P, Xu J, Liu K, Wang D. Facile plasma grafting of zwitterions onto nanofibrous membrane surface for improved antifouling properties and filtration performance. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.129752] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Tuncay G, Keskin B, Türken T, Vatanpour V, Koyuncu I. Development of braid reinforced hollow fiber membranes as both ultrafiltration and nanofiltration membranes: Effect of pore forming additive on structure and performance. J Appl Polym Sci 2022. [DOI: 10.1002/app.53098] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Gizem Tuncay
- Environmental Engineering Department Istanbul Technical University Istanbul Turkey
- National Research Center on Membrane Technologies Istanbul Technical University Istanbul Turkey
| | - Başak Keskin
- Environmental Engineering Department Istanbul Technical University Istanbul Turkey
- National Research Center on Membrane Technologies Istanbul Technical University Istanbul Turkey
| | - Türker Türken
- Environmental Engineering Department Istanbul Technical University Istanbul Turkey
- National Research Center on Membrane Technologies Istanbul Technical University Istanbul Turkey
| | - Vahid Vatanpour
- Environmental Engineering Department Istanbul Technical University Istanbul Turkey
- National Research Center on Membrane Technologies Istanbul Technical University Istanbul Turkey
- Department of Applied Chemistry, Faculty of Chemistry Kharazmi University Tehran Iran
| | - Ismail Koyuncu
- Environmental Engineering Department Istanbul Technical University Istanbul Turkey
- National Research Center on Membrane Technologies Istanbul Technical University Istanbul Turkey
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Fabrication of polysulfone membrane with sponge-like structure by using different non-woven fabrics. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.121553] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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Fallahnejad Z, Bakeri G, Ismail AF. Performance of TFN nanofiltration membranes through embedding internally modified titanate nanotubes. KOREAN J CHEM ENG 2022. [DOI: 10.1007/s11814-021-1036-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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