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Lee C, Kang SW. Influence of citric acid concentrations on the porosity and performance of cellulose acetate-based porous membranes: A comprehensive study. Int J Biol Macromol 2024; 263:130243. [PMID: 38378111 DOI: 10.1016/j.ijbiomac.2024.130243] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2023] [Revised: 02/08/2024] [Accepted: 02/14/2024] [Indexed: 02/22/2024]
Abstract
This study investigates the influence of citric acid concentration on the fabrication of porous cellulose acetate (CA) membranes using the Non-Solvent Induced Phase Separation (NIPS) method. A notable aspect is the precise control over membrane properties, particularly pore size and porosity, achieved solely through the adjustment of citric acid concentration, serving as the additive. Higher concentrations of citric acid increase pore size by rendering polymer chains more pliable, whereas lower concentrations lead to smaller, denser pores due to improved dispersion in the CA matrix and altered water interactions during phase separation. A decrease in porosity and Gurley values with reducing citric acid concentrations (from 5 × 10-2 to 1 × 10-3 M ratios) indicates less plasticization of CA chains. However, at very low concentrations (1 × 10-4 and 1 × 10-5), porosity increases, despite the presence of smaller pores, and Gurley values approach those of pure CA in terms of gas permeability. Fourier Transform Infrared (FT-IR) spectroscopy confirms the presence of citric acid and its interaction with carbonyl groups, consistent with the pore size observations from Scanning Electron Microscopy (SEM). Spectral data deconvolution reveals weakened carbonyl bonds due to the reduced presence of citric acid, correlating with the smaller pores observed in SEM. Thermal Gravimetric Analysis (TGA) demonstrates that composite membranes are more thermally stable than pure CA, attributed to the citric acid-induced crosslinking within the polymer chains. Stability increases with decreasing citric acid concentration, with some anomalies at the lowest levels. In conclusion, this study highlights the capability of adjusting citric acid concentration to tailor membrane properties, offering valuable insights for the creation of porous materials across diverse industrial applications.
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Affiliation(s)
- Chaeyeon Lee
- Department of Chemistry and Energy Engineering, Sangmyung University, Seoul 03016, Republic of Korea
| | - Sang Wook Kang
- Department of Chemistry and Energy Engineering, Sangmyung University, Seoul 03016, Republic of Korea.
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2
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Li C, Tang Y, Lin H, Zhang C, Liu Z, Yu L, Wang X, Lin Y. Novel multiscale simulations on the membrane formation via hybrid induced phase separation process based on dissipative particle dynamics. Sep Purif Technol 2023. [DOI: 10.1016/j.seppur.2023.123614] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023]
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3
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He W, Fan S, Liu G, Zhou L, Chai L, Zhu H, Li C, Yu B. Preparation and properties of poly (vinylidene fluoride) membrane with inverse opal-like structure. Sep Purif Technol 2023. [DOI: 10.1016/j.seppur.2022.122446] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Fluoropolymer Membranes for Membrane Distillation and Membrane Crystallization. Polymers (Basel) 2022; 14:polym14245439. [PMID: 36559805 PMCID: PMC9782556 DOI: 10.3390/polym14245439] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Revised: 12/01/2022] [Accepted: 12/03/2022] [Indexed: 12/15/2022] Open
Abstract
Fluoropolymer membranes are applied in membrane operations such as membrane distillation and membrane crystallization where hydrophobic porous membranes act as a physical barrier separating two phases. Due to their hydrophobic nature, only gaseous molecules are allowed to pass through the membrane and are collected on the permeate side, while the aqueous solution cannot penetrate. However, these two processes suffer problems such as membrane wetting, fouling or scaling. Membrane wetting is a common and undesired phenomenon, which is caused by the loss of hydrophobicity of the porous membrane employed. This greatly affects the mass transfer efficiency and separation efficiency. Simultaneously, membrane fouling occurs, along with membrane wetting and scaling, which greatly reduces the lifespan of the membranes. Therefore, strategies to improve the hydrophobicity of membranes have been widely investigated by researchers. In this direction, hydrophobic fluoropolymer membrane materials are employed more and more for membrane distillation and membrane crystallization thanks to their high chemical and thermal resistance. This paper summarizes different preparation methods of these fluoropolymer membrane, such as non-solvent-induced phase separation (NIPS), thermally-induced phase separation (TIPS), vapor-induced phase separation (VIPS), etc. Hydrophobic modification methods, including surface coating, surface grafting and blending, etc., are also introduced. Moreover, the research advances on the application of less toxic solvents for preparing these membranes are herein reviewed. This review aims to provide guidance to researchers for their future membrane development in membrane distillation and membrane crystallization, using fluoropolymer materials.
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Ma W, Zhou Z, Ismail N, Tocci E, Figoli A, Khayet M, Matsuura T, Cui Z, Tavajohi N. Membrane formation by thermally induced phase separation: Materials, involved parameters, modeling, current efforts and future directions. J Memb Sci 2022. [DOI: 10.1016/j.memsci.2022.121303] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Yu J, Yue D, Sun D, Li B, Ge Y, Lin Y. Micron flower-like CuO light trapping grown on the copper foam skeleton combined with PVDF membrane for solar-driven vacuum membrane distillation. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.121989] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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Zhu J, An Z, Zhang A, Du Y, Zhou X, Geng Y, Chen G. Anisotropic porous designed polymer coatings for high-performance passive all-day radiative cooling. iScience 2022; 25:104126. [PMID: 35402873 PMCID: PMC8983389 DOI: 10.1016/j.isci.2022.104126] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Revised: 02/10/2022] [Accepted: 03/17/2022] [Indexed: 11/25/2022] Open
Abstract
Porous polymer radiative cooling coatings (PPCs) have attracted attention due to their ability of drawing and radiating heat from a hot object into the outer space, without any energy consumption. However, high performance of PPCs has yet to be achieved and the large-scale production of radiative cooling technology is still facing high cost and complex manufacturing constraints. Here, we propose a simple, inexpensive, scalable approach to fabricate anisotropic (P(VdF-HFP))ap PPCs (TPCs) by dissolution and diffusion between solvent and non-solvent-induced phase separation. By adjusting the porosity, pore size, and geometry, a sub-ambient temperature drop of ∼6.3°C in daytime and 10.1°C in night-time was achieved under a solar reflectance of 0.92 and an atmospheric window emittance of 0.96. A thermoelectric generator with an output voltage of almost zero reached 7 V/m2 after coating with TPCs. This could provide a convenient, economical, and environment-friendly way for PPCs materials toward efficient cooling and power generations. Anisotropic porous designed polymer coatings for passive all-day radiative cooling Dissolution and diffusion of the solvent and non-solvent cause phase separation Adjustment of pore shape and size of polymer coating by phase separation process High cooling and power generation efficiency achieved with anisotropic coatings
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Affiliation(s)
- Jiliang Zhu
- Department of Applied Physics, Hebei University of Technology, Tianjin 300401, P. R. China
- Corresponding author
| | - Zhiqiang An
- Department of Applied Physics, Hebei University of Technology, Tianjin 300401, P. R. China
| | - Anxun Zhang
- Department of Applied Physics, Hebei University of Technology, Tianjin 300401, P. R. China
| | - Yike Du
- Department of Applied Physics, Hebei University of Technology, Tianjin 300401, P. R. China
| | - Xuan Zhou
- Department of Applied Physics, Hebei University of Technology, Tianjin 300401, P. R. China
| | - Yizhao Geng
- Department of Applied Physics, Hebei University of Technology, Tianjin 300401, P. R. China
| | - Guifeng Chen
- School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300132, P. R. China
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Yang HL, Ang MBMY, Tsai HA, Lee KR, Lai JY. Effect of adding carbon quantum dots to a NMP solution of cellulose acetate on the formation mechanism of ensuing membrane. J Taiwan Inst Chem Eng 2022. [DOI: 10.1016/j.jtice.2022.104250] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Ibrar I, Yadav S, Naji O, Alanezi AA, Ghaffour N, Déon S, Subbiah S, Altaee A. Development in forward Osmosis-Membrane distillation hybrid system for wastewater treatment. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.120498] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Zhang H, Zhang X, Qian X, Guo C. Dual-Role Mechanism of Dimethyl Sulfone in the Preparation of Surface Layer Membrane of Superfine Fiber Veneer Synthetic Leather. Ind Eng Chem Res 2021. [DOI: 10.1021/acs.iecr.1c03230] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Hao Zhang
- School of Textiles Science and Engineering, Tiangong University, Tianjin 300387, PR China
- Analytical & Testing Center, Tiangong University, Tianjin 300387, PR China
| | - Xiaopeng Zhang
- School of Textiles Science and Engineering, Tiangong University, Tianjin 300387, PR China
| | - Xiaoming Qian
- School of Textiles Science and Engineering, Tiangong University, Tianjin 300387, PR China
| | - Changsheng Guo
- School of Textiles Science and Engineering, Tiangong University, Tianjin 300387, PR China
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Teixeira J, Cardoso VF, Botelho G, Morão AM, Nunes-Pereira J, Lanceros-Mendez S. Effect of Polymer Dissolution Temperature and Conditioning Time on the Morphological and Physicochemical Characteristics of Poly(Vinylidene Fluoride) Membranes Prepared by Non-Solvent Induced Phase Separation. Polymers (Basel) 2021; 13:4062. [PMID: 34883566 PMCID: PMC8659276 DOI: 10.3390/polym13234062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2021] [Revised: 11/12/2021] [Accepted: 11/19/2021] [Indexed: 11/16/2022] Open
Abstract
This work reports on the production of poly(vinylidene fluoride) (PVDF) membranes by non-solvent induced phase separation (NIPS) using N,N-dimethylformamide (DMF) as solvent and water as non-solvent. The influence of the processing conditions in the morphology, surface characteristics, structure, thermal and mechanical properties were evaluated for polymer dissolution temperatures between 25 and 150 °C and conditioning time between 0 and 10 min. Finger-like pore morphology was obtained for all membranes and increasing the polymer dissolution temperature led to an increase in the average pore size (≈0.9 and 2.1 µm), porosity (≈50 to 90%) and water contact angle (up to 80°), in turn decreasing the β PVDF content (≈67 to 20%) with the degree of crystallinity remaining approximately constant (≈56%). The conditioning time did not significantly affect the polymer properties studied. Thus, the control of NIPS parameters proved to be suitable for tailoring PVDF membrane properties.
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Affiliation(s)
- João Teixeira
- CF-UM-UP, Centre of Physics of Minho and Porto Universities, Campus de Gualtar, University of Minho, 4710-057 Braga, Portugal; (J.T.); (V.F.C.)
| | - Vanessa Fernandes Cardoso
- CF-UM-UP, Centre of Physics of Minho and Porto Universities, Campus de Gualtar, University of Minho, 4710-057 Braga, Portugal; (J.T.); (V.F.C.)
- CMEMS-UMinho, Campus de Azurém, University of Minho, 4800-058 Guimarães, Portugal
| | - Gabriela Botelho
- Department of Chemistry, Campus de Gualtar, University of Minho, 4710-057 Braga, Portugal;
| | - António Miguel Morão
- CICS-UBI, The Health Sciences Research Centre, University of Beira Interior, Av. Infante D. Henrique, 6200-506 Covilhã, Portugal;
| | - João Nunes-Pereira
- CF-UM-UP, Centre of Physics of Minho and Porto Universities, Campus de Gualtar, University of Minho, 4710-057 Braga, Portugal; (J.T.); (V.F.C.)
- C-MAST-UBI, Centre for Mechanical and Aerospace Science and Technologies, University of Beira Interior, Rua Marquês d’Ávila e Bolama, 6200-001 Covilhã, Portugal
| | - Senentxu Lanceros-Mendez
- BCMaterials, Basque Center for Materials, Applications and Nanostructures, UPV/EHU Science Park, 48940 Leioa, Spain
- IKERBASQUE, Basque Foundation for Science, 48009 Bilbao, Spain
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Frappa M, Macedonio F, Gugliuzza A, Jin W, Drioli E. Performance of PVDF Based Membranes with 2D Materials for Membrane Assisted-Crystallization Process. MEMBRANES 2021; 11:302. [PMID: 33919213 PMCID: PMC8143142 DOI: 10.3390/membranes11050302] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Revised: 04/08/2021] [Accepted: 04/16/2021] [Indexed: 11/29/2022]
Abstract
Membrane crystallization (MCr) is a promising and innovative process for the recovery of freshwater from seawater and for the production of salt crystals from the brine streams of desalination plants. In the present work, composite polymeric membranes for membrane crystallization were fabricated using graphene and bismuth telluride inks prepared according to the wet-jet milling (WJM) technology. A comparison between PVDF-based membranes containing a few layers of graphene or bismuth telluride and PVDF-pristine membranes was carried out. Among the 2D composite membranes, PVDF with bismuth telluride at higher concentration (7%) exhibited the highest flux (about 3.9 L∙m-2h-1, in MCr experiments performed with 5 M NaCl solution as feed, and at a temperature of 34 ± 0.2 °C at the feed side and 11 ± 0.2 °C at the permeate side). The confinement of graphene and bismuth telluride in PVDF membranes produced more uniform NaCl crystals with respect to the pristine PVDF membrane, especially in the case of few-layer graphene. All the membranes showed rejection equal to or higher than 99.9% (up to 99.99% in the case of the membrane with graphene). The high rejection together with the good trans-membrane flux confirmed the interesting performance of the process, without any wetting phenomena, at least during the performed crystallization tests.
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Affiliation(s)
- Mirko Frappa
- Institute on Membrane Technology, National Research Council of Italy (CNR-ITM), via Bucci 17/C, 87036 Rende, Italy; (M.F.); (E.D.)
| | - Francesca Macedonio
- Institute on Membrane Technology, National Research Council of Italy (CNR-ITM), via Bucci 17/C, 87036 Rende, Italy; (M.F.); (E.D.)
| | - Annarosa Gugliuzza
- Institute on Membrane Technology, National Research Council of Italy (CNR-ITM), via Bucci 17/C, 87036 Rende, Italy; (M.F.); (E.D.)
| | - Wanqin Jin
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, 30 Puzhou Road (S), Nanjing 211816, China;
| | - Enrico Drioli
- Institute on Membrane Technology, National Research Council of Italy (CNR-ITM), via Bucci 17/C, 87036 Rende, Italy; (M.F.); (E.D.)
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, 30 Puzhou Road (S), Nanjing 211816, China;
- Department of Environmental and Chemical Engineering, University of Calabria, via Bucci Cubo 44A, 87036 Rende, Italy
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Frappa M, Del Rio Castillo AE, Macedonio F, Politano A, Drioli E, Bonaccorso F, Pellegrini V, Gugliuzza A. A few-layer graphene for advanced composite PVDF membranes dedicated to water desalination: a comparative study. NANOSCALE ADVANCES 2020; 2:4728-4739. [PMID: 36132930 PMCID: PMC9417500 DOI: 10.1039/d0na00403k] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2020] [Accepted: 08/15/2020] [Indexed: 05/12/2023]
Abstract
Membrane distillation is envisaged to be a promising best practice to recover freshwater from seawater with the prospect of building low energy-consuming devices powered by natural and renewable energy sources in remote and less accessible areas. Moreover, there is an additional benefit of integrating this green technology with other well-established operations dedicated to desalination. Today, the development of membrane distillation depends on the productivity-efficiency ratio on a large scale. Despite hydrophobic commercial membranes being widely used, no membrane with suitable morphological and chemical feature is readily available in the market. Thus, there is a real need to identify best practices for developing new efficient membranes for more productive and eco-sustainable membrane distillation devices. Here, we propose engineered few-layer graphene membranes, showing enhanced trans-membrane fluxes and total barrier action against NaCl ions. The obtained performances are linked with filling polymeric membranes with few-layer graphene of 490 nm in lateral size, produced by the wet-jet milling technology. The experimental evidence, together with comparative analyses, confirmed that the use of more largely sized few-layer graphene leads to superior productivity related efficiency trade-off for the membrane distillation process. Herein, it was demonstrated that the quality of exfoliation is a crucial factor for addressing the few-layer graphene supporting the separation capability of the host membranes designed for water desalination.
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Affiliation(s)
- M Frappa
- Institute on Membrane Technology-National Research Council (CNR-ITM) Via Pietro Bucci 17C Rende (CS) 87036 Italy
| | - A E Del Rio Castillo
- Graphene Labs, Fondazione Istituto Italiano di Tecnologia Via Morego 3016163 Genova Italy
| | - F Macedonio
- Institute on Membrane Technology-National Research Council (CNR-ITM) Via Pietro Bucci 17C Rende (CS) 87036 Italy
| | - A Politano
- Graphene Labs, Fondazione Istituto Italiano di Tecnologia Via Morego 3016163 Genova Italy
- Department of Physical and Chemical Sciences, University of L'Aquila Via Vetoio 67100 L'Aquila AQ Italy
| | - E Drioli
- Institute on Membrane Technology-National Research Council (CNR-ITM) Via Pietro Bucci 17C Rende (CS) 87036 Italy
- Department of Environmental and Chemical Engineering, University of Calabria Via P. Bucci 87036 Rende CS Italy
| | - F Bonaccorso
- Graphene Labs, Fondazione Istituto Italiano di Tecnologia Via Morego 3016163 Genova Italy
- Bedimensional s.p.a Via Albisola 121 16163 Genova Italy
| | - V Pellegrini
- Graphene Labs, Fondazione Istituto Italiano di Tecnologia Via Morego 3016163 Genova Italy
- Bedimensional s.p.a Via Albisola 121 16163 Genova Italy
| | - A Gugliuzza
- Institute on Membrane Technology-National Research Council (CNR-ITM) Via Pietro Bucci 17C Rende (CS) 87036 Italy
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