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Zhao H, He T, Yao S, Tao L, Zhang X, Wang Z, Cui Z, Chen R. Improved Protein Removal Performance of PES Hollow-Fiber Ultrafiltration Membrane with Sponge-like Structure. Polymers (Basel) 2024; 16:1194. [PMID: 38732663 PMCID: PMC11085754 DOI: 10.3390/polym16091194] [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: 02/19/2024] [Revised: 04/05/2024] [Accepted: 04/10/2024] [Indexed: 05/13/2024] Open
Abstract
The research used polyethersulfone (PES) as a membrane material, polyvinylpyrrolidone (PVP) k30 and polyethylene glycol 400 (PEG 400) as water-soluble additives, and dimethylacetamide (DMAc) as a solvent to prepare hollow-fiber ultrafiltration membranes through a nonsolvent-induced phase separation (NIPS) process. The hydrophilic nature of PVP-k30 and PEG caused them to accumulate on the membrane surface during phase separation. The morphology, chemical composition, surface charge, and pore size of the PES membranes were evaluated by SEM, FTIR, zeta potential, and dextran filtration experiments. The paper also investigated how different spinning solution compositions affected membrane morphology and performance. The separation efficiency of membranes with four different morphologies was tested in single-protein and double-protein mixed solutions. The protein separation effectiveness of the membrane was studied through molecular weight cutoff, zeta potential, and static protein adsorption tests. In addition, the operating pressure and pH value were adjusted to improve ultrafiltration process conditions. The PES membrane with an intact sponge-like structure showed the highest separation factor of 11, making it a prime candidate membrane for the separation of bovine serum albumin (BSA) and lysozyme (LYS). The membrane had a minimal static protein adsorption capacity of 48 mg/cm2 and had excellent anti-fouling properties. When pH = 4, the BSA retention rate was 93% and the LYS retention rate was 23%. Furthermore, it exhibited excellent stability over a pH range of 1-13, confirming its suitability for protein separation applications.
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Affiliation(s)
- Huyang Zhao
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 210009, China; (H.Z.); (T.H.); (L.T.); (X.Z.); (R.C.)
- National Engineering Research Center for Special Separation Membrane, Nanjing Tech University, Nanjing 210009, China
| | - Ting He
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 210009, China; (H.Z.); (T.H.); (L.T.); (X.Z.); (R.C.)
- National Engineering Research Center for Special Separation Membrane, Nanjing Tech University, Nanjing 210009, China
| | - Shuang Yao
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 210009, China; (H.Z.); (T.H.); (L.T.); (X.Z.); (R.C.)
- National Engineering Research Center for Special Separation Membrane, Nanjing Tech University, Nanjing 210009, China
| | - Long Tao
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 210009, China; (H.Z.); (T.H.); (L.T.); (X.Z.); (R.C.)
- National Engineering Research Center for Special Separation Membrane, Nanjing Tech University, Nanjing 210009, China
| | - Xinhai Zhang
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 210009, China; (H.Z.); (T.H.); (L.T.); (X.Z.); (R.C.)
- National Engineering Research Center for Special Separation Membrane, Nanjing Tech University, Nanjing 210009, China
| | - Zhaohui Wang
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 210009, China; (H.Z.); (T.H.); (L.T.); (X.Z.); (R.C.)
- National Engineering Research Center for Special Separation Membrane, Nanjing Tech University, Nanjing 210009, China
- Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University, Nanjing 210009, China
| | - Zhaoliang Cui
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 210009, China; (H.Z.); (T.H.); (L.T.); (X.Z.); (R.C.)
- National Engineering Research Center for Special Separation Membrane, Nanjing Tech University, Nanjing 210009, China
- Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University, Nanjing 210009, China
| | - Rizhi Chen
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 210009, China; (H.Z.); (T.H.); (L.T.); (X.Z.); (R.C.)
- National Engineering Research Center for Special Separation Membrane, Nanjing Tech University, Nanjing 210009, China
- Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University, Nanjing 210009, China
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2
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Zhou Y, Tian Y, Zhang M. Technical development and application of supercritical CO 2 foaming technology in PCL foam production. Sci Rep 2024; 14:6825. [PMID: 38514733 PMCID: PMC10958027 DOI: 10.1038/s41598-024-57545-6] [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: 10/23/2023] [Accepted: 03/19/2024] [Indexed: 03/23/2024] Open
Abstract
Polycaprolactone (PCL) has the advantages of good biocompatibility, appropriate biodegradability, non-toxicity, flexibility, and processability. As a result, PCL-based foams can successfully work in bone tissue engineering, medical patches, drug delivery, reinforcing materials, and other applications. A promising technology for producing PCL foam products is supercritical CO2 (ScCO2) foaming technology, which avoids using organic solvents, is green, and has low foaming agent costs. However, due to the limitations of ScCO2 foaming technology, it is no longer possible to use this technology alone to meet current production requirements. Therefore, ScCO2 foaming technology must combine with other technologies to develop PCL foam products with better performance and matching requirements. This paper systematically reviews the technological development of ScCO2 foaming in producing PCL foams. The molding process of ScCO2 foaming and the conventional preparation process of PCL foam products are discussed comprehensively, including the preparation process, advantages, and disadvantages, challenges faced, etc. Six combined technologies for ScCO2 foaming in the production of PCL foams and the applications of PCL foams are presented. Finally, the future remaining research for producing PCL foams by ScCO2 foaming is analyzed.
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Affiliation(s)
- Yujin Zhou
- College of Physical Education, Wuhan Sports University, Wuhan, 430079, China
- College of Science, Wuhan University of Science and Technology, Wuhan, 430081, China
| | - Yingrui Tian
- School of Materials and Metallurgy, Wuhan University of Science and Technology, Wuhan, 430081, China
| | - Mengdong Zhang
- Hubei Key Laboratory of Advanced Technology for Automotive Components & Hubei Collaborative Innovation Center for Automotive Components Technology, Wuhan University of Technology, Wuhan, 430070, China.
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3
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Lee C, Lee S, Kang SW. Enhanced porous membrane fabrication using cellulose acetate and citric acid: Improved structural integrity, thermal stability, and gas permeability. Carbohydr Polym 2024; 324:121571. [PMID: 37985069 DOI: 10.1016/j.carbpol.2023.121571] [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: 09/24/2023] [Revised: 11/03/2023] [Accepted: 11/05/2023] [Indexed: 11/22/2023]
Abstract
In this study, our primary objective was to enhance the properties of porous membranes by addressing the limitations associated with phase separation. We employed a non-solvent induced phase separation (NIPS) method, utilizing cellulose acetate (CA) in conjunction with citric acid to fabricate these membranes. Citric acid played a dual role: ensuring a uniform pore structure and cross-linking the CA polymer, thereby enhancing its mechanical strength. This approach resulted in the development of a more robust membrane with superior structural integrity. Thermogravimetric analysis (TGA) confirmed enhanced thermal stability, particularly up to 150 °C, as a result of citric acid's cross-linking effect. Beyond 150 °C, the decomposition temperatures of the CA/citric acid membrane were found to be comparable to those of pure CA. Remarkably, a CA/citric acid ratio of 1:0.05 exhibited the slowest decomposition rate as the temperature increased. Scanning electron microscopy (SEM) examination unveiled a sponge-like membrane structure with numerous evenly distributed fine pores. Through the use of citric acid as a plasticizer, we were able to effectively control the penetration of water molecules, preventing the formation of macrovoids and promoting the creation of fine pores. This resulted in the fabrication of a high-porosity membrane, boasting an impressive porosity measurement of 84.9 %. Furthermore, measurements of the Gurley value confirmed efficient gas permeation, a critical characteristic for applications requiring effective gas transport. Fourier transform infrared (FT-IR) spectroscopy attested to the presence of citric acid in the membrane post-phase separation, indicating its successful integration. Our work presents a novel approach to enhance porous membranes, providing improvements in mechanical strength, thermal stability, and gas permeability. These findings offer valuable insights for the development of advanced materials with diverse applications in various fields.
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Affiliation(s)
- Chaeyeon Lee
- Department of Chemistry and Energy Engineering, Sangmyung University, Seoul 03016, Republic of Korea
| | - Sojeong 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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4
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Mubarak MF, Selim H, Hawash HB, Hemdan M. Flexible, durable, and anti-fouling maghemite copper oxide nanocomposite-based membrane with ultra-high flux and efficiency for oil-in-water emulsions separation. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:2297-2313. [PMID: 38062214 DOI: 10.1007/s11356-023-31240-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2023] [Accepted: 11/21/2023] [Indexed: 01/18/2024]
Abstract
In this study, we developed a novel nanocomposite-based membrane using maghemite copper oxide (MC) to enhance the separation efficiency of poly(vinyl chloride) (PVC) membranes for oil-in-water emulsions. The MC nanocomposite was synthesized using a co-precipitation method and incorporated into a PVC matrix by casting. The resulting nanocomposite-based membrane demonstrated a high degree of crystallinity and well-dispersed nanostructure, as confirmed by TEM, SEM, XRD, and FT-IR analyses. The performance of the membrane was evaluated in terms of water flux, solute rejection, and anti-fouling properties. The pinnacle of performance was unequivocally reached with a solution dosage of 50 mL, a solution concentration of 100 mg L-1, and a pump pressure of 2 bar, ensuring that every facet of the membrane's potential was fully harnessed. The new fabricated membrane exhibited superior efficiency for oil-water separation, with a rejection rate of 98% and an ultra-high flux of 0.102 L/m2 h compared to pure PVC membranes with about 90% rejection rate and an ultra-high flux of 0.085 L/m2 h. Furthermore, meticulous contact angle measurements revealed that the PMC nanocomposite membrane exhibited markedly lower contact angles (65° with water, 50° with ethanol, and 25° with hexane) compared to PVC membranes. This substantial reduction, transitioning from 85 to 65° with water, 65 to 50° with ethanol, and 45 to 25° with hexane for pure PVC membranes, underscores the profound enhancement in hydrophilicity attributed to the heightened nanoparticle content. Importantly, the rejection efficiency remained stable over five cycles, indicating excellent anti-fouling and cycling stability. The results highlight the potential of the maghemite copper oxide nanocomposite-based PVC membrane as a promising material for effective oil-in-water emulsion separation. This development opens up new possibilities for more flexible, durable, and anti-fouling membranes, making them ideal candidates for potential applications in separation technology. The presented findings provide valuable information for the advancement of membrane technology and its utilization in various industries, addressing the pressing challenge of oil-induced water pollution and promoting environmental sustainability.
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Affiliation(s)
- Mahmoud F Mubarak
- Department of Petroleum Application, Core Lab Analysis Center, Egyptian Petroleum Research Institute, P.B. 11727, Nasr City, Cairo, Egypt
| | - Hanaa Selim
- Department of Analysis and Evaluation, Egyptian Petroleum Research Institute, Nasr City, 11727, Cairo, Egypt.
| | - Hamada B Hawash
- Environmental Division, National Institute of Oceanography and Fisheries, NIOF, Cairo, Egypt
| | - Mohamed Hemdan
- School of Biotechnology, Badr University in Cairo (BUC), Badr City, 11829, Cairo, Egypt
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5
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Fernández-Rico C, Schreiber S, Oudich H, Lorenz C, Sicher A, Sai T, Bauernfeind V, Heyden S, Carrara P, Lorenzis LD, Style RW, Dufresne ER. Elastic microphase separation produces robust bicontinuous materials. NATURE MATERIALS 2024; 23:124-130. [PMID: 37884672 DOI: 10.1038/s41563-023-01703-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Accepted: 09/22/2023] [Indexed: 10/28/2023]
Abstract
Bicontinuous microstructures are essential to the function of diverse natural and synthetic systems. Their synthesis has been based on two approaches: arrested phase separation or self-assembly of block copolymers. The former is attractive for its chemical simplicity and the latter, for its thermodynamic robustness. Here we introduce elastic microphase separation (EMPS) as an alternative approach to make bicontinuous microstructures. Conceptually, EMPS balances the molecular-scale forces that drive demixing with large-scale elasticity to encode a thermodynamic length scale. This process features a continuous phase transition, reversible without hysteresis. Practically, EMPS is triggered by simply supersaturating an elastomeric matrix with a liquid, resulting in uniform bicontinuous materials with a well-defined microscopic length scale tuned by the matrix stiffness. The versatility of EMPS is further demonstrated by fabricating bicontinuous materials with superior mechanical properties and controlled anisotropy and microstructural gradients. Overall, EMPS presents a robust alternative for the bulk fabrication of homogeneous bicontinuous materials.
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Affiliation(s)
| | | | - Hamza Oudich
- Department of Mechanical and Process Engineering, ETH Zürich, Zürich, Switzerland
| | | | - Alba Sicher
- Department of Materials, ETH Zürich, Zürich, Switzerland
| | - Tianqi Sai
- Department of Materials, ETH Zürich, Zürich, Switzerland
| | - Viola Bauernfeind
- Adolphe Merkle Institute, University of Fribourg, Fribourg, Switzerland
| | | | - Pietro Carrara
- Department of Mechanical and Process Engineering, ETH Zürich, Zürich, Switzerland
| | - Laura De Lorenzis
- Department of Mechanical and Process Engineering, ETH Zürich, Zürich, Switzerland
| | - Robert W Style
- Department of Materials, ETH Zürich, Zürich, Switzerland
| | - Eric R Dufresne
- Department of Materials, ETH Zürich, Zürich, Switzerland.
- Department of Materials Science and Engineering, Department of Physics, Cornell University, Ithaca, NY, USA.
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6
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Mahmoud AED, Mostafa E. Nanofiltration Membranes for the Removal of Heavy Metals from Aqueous Solutions: Preparations and Applications. MEMBRANES 2023; 13:789. [PMID: 37755211 PMCID: PMC10538012 DOI: 10.3390/membranes13090789] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2023] [Revised: 09/02/2023] [Accepted: 09/06/2023] [Indexed: 09/28/2023]
Abstract
Water shortages are one of the problems caused by global industrialization, with most wastewater discharged without proper treatment, leading to contamination and limited clean water supply. Therefore, it is important to identify alternative water sources because many concerns are directed toward sustainable water treatment processes. Nanofiltration membrane technology is a membrane integrated with nanoscale particle size and is a superior technique for heavy metal removal in the treatment of polluted water. The fabrication of nanofiltration membranes involves phase inversion and interfacial polymerization. This review provides a comprehensive outline of how nanoparticles can effectively enhance the fabrication, separation potential, and efficiency of NF membranes. Nanoparticles take the form of nanofillers, nanoembedded membranes, and nanocomposites to give multiple approaches to the enhancement of the NF membrane's performance. This could significantly improve selectivity, fouling resistance, water flux, porosity, roughness, and rejection. Nanofillers can form nanoembedded membranes and thin films through various processes such as in situ polymerization, layer-by-layer assembly, blending, coating, and embedding. We discussed the operational conditions, such as pH, temperature, concentration of the feed solution, and pressure. The mitigation strategies for fouling resistance are also highlighted. Recent developments in commercial nanofiltration membranes have also been highlighted.
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Affiliation(s)
- Alaa El Din Mahmoud
- Environmental Sciences Department, Faculty of Science, Alexandria University, Alexandria 21511, Egypt
- Green Technology Group, Faculty of Science, Alexandria University, Alexandria 21511, Egypt
| | - Esraa Mostafa
- Environmental Sciences Department, Faculty of Science, Alexandria University, Alexandria 21511, Egypt
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7
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Zhang Q, Zhou R, Peng X, Li N, Dai Z. Development of Support Layers and Their Impact on the Performance of Thin Film Composite Membranes (TFC) for Water Treatment. Polymers (Basel) 2023; 15:3290. [PMID: 37571184 PMCID: PMC10422403 DOI: 10.3390/polym15153290] [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: 06/12/2023] [Revised: 07/30/2023] [Accepted: 07/31/2023] [Indexed: 08/13/2023] Open
Abstract
Thin-film composite (TFC) membranes have gained significant attention as an appealing membrane technology due to their reversible fouling and potential cost-effectiveness. Previous studies have predominantly focused on improving the selective layers to enhance membrane performance. However, the importance of improving the support layers has been increasingly recognized. Therefore, in this review, preparation methods for the support layer, including the traditional phase inversion method and the electrospinning (ES) method, as well as the construction methods for the support layer with a polyamide (PA) layer, are analyzed. Furthermore, the effect of the support layers on the performance of the TFC membrane is presented. This review aims to encourage the exploration of suitable support membranes to enhance the performance of TFC membranes and extend their future applications.
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Affiliation(s)
- Qing Zhang
- School of Chemical Engineering and Technology, Tiangong University, Tianjin 300387, China
- State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin 300387, China
| | - Rui Zhou
- School of Chemical Engineering and Technology, Tiangong University, Tianjin 300387, China
- State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin 300387, China
| | - Xue Peng
- School of Chemical Engineering and Technology, Tiangong University, Tianjin 300387, China
- State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin 300387, China
| | - Nan Li
- State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin 300387, China
- School of Chemistry, Tiangong University, Tianjin 300387, China
| | - Zhao Dai
- School of Chemical Engineering and Technology, Tiangong University, Tianjin 300387, China
- State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin 300387, China
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8
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Woods S, Tinkler JD, Bensabeh N, Palà M, Martin SJ, Martin-Fabiani I, Lligadas G, Hatton FL. Temperature-Responsive Lactic Acid-Based Nanoparticles by RAFT-Mediated Polymerization-Induced Self-Assembly in Water. ACS SUSTAINABLE CHEMISTRY & ENGINEERING 2023; 11:9979-9988. [PMID: 37448723 PMCID: PMC10337250 DOI: 10.1021/acssuschemeng.3c01112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/24/2023] [Revised: 06/08/2023] [Indexed: 07/15/2023]
Abstract
This work demonstrates for the first-time biobased, temperature-responsive diblock copolymer nanoparticles synthesized by reversible addition-fragmentation chain-transfer (RAFT) aqueous emulsion polymerization-induced self-assembly (PISA). Here, monomers derived from green solvents of the lactic acid portfolio, N,N-dimethyl lactamide acrylate (DMLA) and ethyl lactate acrylate (ELA), were used. First, DMLA was polymerized by RAFT aqueous solution polymerization to produce a hydrophilic PDMLA macromolecular chain transfer agent (macro-CTA), which was chain extended with ELA in water to form amphiphilic PDMLA-b-PELA diblock copolymer nanoparticles by RAFT aqueous emulsion polymerization. PDMLAx homopolymers were synthesized targeting degrees of polymerization, DPx from 25 to 400, with relatively narrow molecular weight dispersities (Đ < 1.30). The PDMLA64-b-PELAy diblock copolymers (DPy = 10-400) achieved dispersities, Đ, between 1.18 and 1.54 with two distinct glass transition temperatures (Tg) identified by differential scanning calorimetry (DSC). Tg(1) (7.4 to 15.7 °C) representative of PELA and Tg(2) (69.1 to 79.7 °C) of PDMLA. Dynamic light scattering (DLS) studies gave particle z-average diameters between 11 and 74 nm (PDI = 0.04 to 0.20). Atomic force microscopy (AFM) showed evidence of spherical particles when dispersions were dried at ∼5 °C and film formation when dried at room temperature. Many of these polymers exhibited a reversible lower critical solution temperature (LCST) in water with a concomitant increase in z-average diameter for the PDMLA-b-PELA diblock copolymer nanoparticles.
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Affiliation(s)
- Sarah
E. Woods
- Department
of Materials, Loughborough University, Loughborough LE11 3TU, United Kingdom
| | - James David Tinkler
- Department
of Materials, Loughborough University, Loughborough LE11 3TU, United Kingdom
| | - Nabil Bensabeh
- Laboratory
of Sustainable Polymers, Department of Analytical Chemistry and Organic
Chemistry, University Rovira i Virgili, 43007 Tarragona, Spain
| | - Marc Palà
- Laboratory
of Sustainable Polymers, Department of Analytical Chemistry and Organic
Chemistry, University Rovira i Virgili, 43007 Tarragona, Spain
| | - Simon J. Martin
- Department
of Materials, Loughborough University, Loughborough LE11 3TU, United Kingdom
| | | | - Gerard Lligadas
- Laboratory
of Sustainable Polymers, Department of Analytical Chemistry and Organic
Chemistry, University Rovira i Virgili, 43007 Tarragona, Spain
| | - Fiona L. Hatton
- Department
of Materials, Loughborough University, Loughborough LE11 3TU, United Kingdom
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Bano S, Pednekar M, Rameshkumar S, Borah D, Morris MA, Padamati RB, Cronly N. Fabrication and Evaluation of Filtration Membranes from Industrial Polymer Waste. MEMBRANES 2023; 13:445. [PMID: 37103872 PMCID: PMC10143593 DOI: 10.3390/membranes13040445] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Revised: 03/28/2023] [Accepted: 03/28/2023] [Indexed: 06/19/2023]
Abstract
Polyvinylidene fluoride (PVDF) polymers are known for their diverse range of industrial applications and are considered important raw materials for membrane manufacturing. In view of circularity and resource efficiency, the present work mainly deals with the reusability of waste polymer 'gels' produced during the manufacturing of PVDF membranes. Herein, solidified PVDF gels were first prepared from polymer solutions as model waste gels, which were then subsequently used to prepare membranes via the phase inversion process. The structural analysis of fabricated membranes confirmed the retention of molecular integrity even after reprocessing, whereas the morphological analysis showed a symmetric bi-continuous porous structure. The filtration performance of membranes fabricated from waste gels was studied in a crossflow assembly. The results demonstrate the feasibility of gel-derived membranes as potential microfiltration membranes exhibiting a pure water flux of 478 LMH with a mean pore size of ~0.2 µm. To further evaluate industrial applicability, the performance of the membranes was tested in the clarification of industrial wastewater, and the membranes showed good recyclability with about 52% flux recovery. The performance of gel-derived membranes thus demonstrates the recycling of waste polymer gels for improving the sustainability of membrane fabrication processes.
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Affiliation(s)
- Saleheen Bano
- School of Chemistry, CRANN, Trinity College Dublin, D02 PN40 Dublin, Ireland
- AMBER, SFI Research Centre for Advanced Materials and BioEngineering Research, D02 PN40 Dublin, Ireland
| | - Mukesh Pednekar
- AMBER, SFI Research Centre for Advanced Materials and BioEngineering Research, D02 PN40 Dublin, Ireland
- School of Physics, CRANN, Trinity College Dublin, D02 PN40 Dublin, Ireland
- Dairy Processing Technology Centre (DPTC), University of Limerick, V94 T9PX Limerick, Ireland
| | - Saranya Rameshkumar
- School of Chemistry, CRANN, Trinity College Dublin, D02 PN40 Dublin, Ireland
- AMBER, SFI Research Centre for Advanced Materials and BioEngineering Research, D02 PN40 Dublin, Ireland
| | - Dipu Borah
- School of Chemistry, CRANN, Trinity College Dublin, D02 PN40 Dublin, Ireland
- AMBER, SFI Research Centre for Advanced Materials and BioEngineering Research, D02 PN40 Dublin, Ireland
| | - Michael A. Morris
- School of Chemistry, CRANN, Trinity College Dublin, D02 PN40 Dublin, Ireland
- AMBER, SFI Research Centre for Advanced Materials and BioEngineering Research, D02 PN40 Dublin, Ireland
| | - Ramesh Babu Padamati
- School of Chemistry, CRANN, Trinity College Dublin, D02 PN40 Dublin, Ireland
- AMBER, SFI Research Centre for Advanced Materials and BioEngineering Research, D02 PN40 Dublin, Ireland
- Dairy Processing Technology Centre (DPTC), University of Limerick, V94 T9PX Limerick, Ireland
| | - Niamh Cronly
- School of Chemistry, CRANN, Trinity College Dublin, D02 PN40 Dublin, Ireland
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10
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Phase Equilibria and Structure Formation in the Polylactic-co-Glycolic Acid/Tetraglycol/Water Ternary System. Polymers (Basel) 2023; 15:polym15051281. [PMID: 36904522 PMCID: PMC10007394 DOI: 10.3390/polym15051281] [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: 01/24/2023] [Revised: 02/28/2023] [Accepted: 03/01/2023] [Indexed: 03/06/2023] Open
Abstract
This paper concerns a detailed study of the phase separation and structure formation processes that occur in solutions of highly hydrophobic polylactic-co-glycolic acid (PLGA) in highly hydrophilic tetraglycol (TG) upon their contact with aqueous media. In the present work, cloud point methodology, high-speed video recording, differential scanning calorimetry, and both optical and scanning electron microscopy were used to analyze the behavior of PLGA/TG mixtures differing in composition when they are immersed in water (the so-called "harsh" antisolvent) or in a nonsolvent consisting of equal amounts of water and TG (a "soft" antisolvent). The phase diagram of the ternary PLGA/TG/water system was designed and constructed for the first time. The PLGA/TG mixture composition with which the polymer undergoes glass transition at room temperature was determined. Our data enabled us to analyze in detail the structure evolution process taking place in various mixtures upon their immersion in "harsh" and "soft" antisolvent baths and gain an insight into the peculiarities of the structure formation mechanism active in the course of antisolvent-induced phase separation in PLGA/TG/water mixtures. This provides intriguing opportunities for the controlled fabrication of a wide variety of bioresorbable structures-from polyester microparticles, fibers, and membranes to scaffolds for tissue engineering.
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11
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Chen G, Xie W, Chen C, Wu Q, Qin S, Liu B. Preparation of High Flux Chlorinated Polyvinyl Chloride Composite Ultrafiltration Membranes with Ternary Amphiphilic Copolymers as Anchor Pore-Forming Agents and Enhanced Anti-Fouling Behavior. Ind Eng Chem Res 2023. [DOI: 10.1021/acs.iecr.2c03847] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Guijing Chen
- Institute for Disaster Management and Reconstruction, Sichuan University, Chengdu, Sichuan610207, PR China
- Yibin Institute of Industrial Technology, Sichuan University, Yibin Park, Section 2, Lingang Avenue, Cuiping District, Yibin, Sichuan644000, PR China
| | - Wancen Xie
- Yibin Institute of Industrial Technology, Sichuan University, Yibin Park, Section 2, Lingang Avenue, Cuiping District, Yibin, Sichuan644000, PR China
- State Key Laboratory of Hydraulics and Mountain River Engineering, Institute of New Energy and Low-Carbon Technology, Sichuan University, Chengdu, Sichuan610207, PR China
| | - Chen Chen
- Litree Purifying Technology Co., Ltd., Haikou, Hainan571126, PR China
| | - Qidong Wu
- Yibin Institute of Industrial Technology, Sichuan University, Yibin Park, Section 2, Lingang Avenue, Cuiping District, Yibin, Sichuan644000, PR China
- State Key Laboratory of Hydraulics and Mountain River Engineering, Institute of New Energy and Low-Carbon Technology, Sichuan University, Chengdu, Sichuan610207, PR China
| | - Shuhao Qin
- National Engineering Research Center for Compounding and Modification of Polymer Materials, Guiyang550014, China
| | - Baicang Liu
- Institute for Disaster Management and Reconstruction, State Key Laboratory of Hydraulics and Mountain River Engineering, Institute of New Energy and Low-Carbon Technology, College of Architecture and Environment, Sichuan University, Chengdu, Sichuan610207, PR China
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12
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Boosting the permeation of ultrafiltration membranes by covalent organic frameworks nanofillers: Nanofibers doing better than nanoparticles. J Memb Sci 2022. [DOI: 10.1016/j.memsci.2022.120944] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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13
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MacKeown H, Benedetti B, Scapuzzi C, Di Carro M, Magi E. A Review on Polyethersulfone Membranes in Polar Organic Chemical Integrative Samplers: Preparation, Characterization and Innovation. Crit Rev Anal Chem 2022:1-17. [PMID: 36263980 DOI: 10.1080/10408347.2022.2131374] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
The membranes in polar organic chemical integrative samplers (POCIS) enclose the receiving sorbent and protect it from coming into direct contact with the environmental matrix. They have a crucial role in extending the kinetic regime of contaminant uptake, by slowing down their diffusion between the water phase and the receiving phase. The drive to improve passive sampling requires membranes with better design and enhanced performances. In this review, the preparation of standard polyethersulfone (PES) membranes for POCIS is presented, as well as methods to evaluate their composition, morphology, structure, and performance. Generally, only supplier-related morphological and structural data are provided, such as membrane type, thickness, surface area, and pore diameter. The issues related to the use of PES membranes in POCIS applications are exposed. Finally, alternative membranes to PES in POCIS are also discussed, although no better membrane has yet been developed. This review highlights the urge for more membrane characterization details and a better comprehension of the mechanisms which underlay their behavior and performance, to improve membrane selection and optimize passive sampler development.
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Affiliation(s)
- Henry MacKeown
- Department of Chemistry and Industrial Chemistry, University of Genoa, Genoa, Italy
| | - Barbara Benedetti
- Department of Chemistry and Industrial Chemistry, University of Genoa, Genoa, Italy
| | - Chiara Scapuzzi
- Department of Chemistry and Industrial Chemistry, University of Genoa, Genoa, Italy
| | - Marina Di Carro
- Department of Chemistry and Industrial Chemistry, University of Genoa, Genoa, Italy
| | - Emanuele Magi
- Department of Chemistry and Industrial Chemistry, University of Genoa, Genoa, Italy
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14
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Thermodynamic analysis of polymeric membrane formation by non-solvent induced phase separation in the presence of different nanoparticles. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.119732] [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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15
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Maggay IV, Yu ML, Wang DM, Chiang CH, Chang Y, Venault A. Strategy to prepare skin-free and macrovoid-free polysulfone membranes via the NIPS process. J Memb Sci 2022. [DOI: 10.1016/j.memsci.2022.120597] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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16
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Lu D, Babaniamansour P, Williams A, Opfar K, Nurick P, Escobar IC. Fabrication and evaporation time investigation of water treatment membranes using green solvents and recycled polyethylene terephthalate. J Appl Polym Sci 2022. [DOI: 10.1002/app.52823] [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]
Affiliation(s)
- David Lu
- Department of Chemical and Materials Engineering University of Kentucky Lexington Kentucky USA
| | - Parto Babaniamansour
- F. Joseph Halcomb III, M.D. Department of Biomedical Engineering University of Kentucky Lexington Kentucky USA
| | - Alex Williams
- Department of Chemical and Materials Engineering University of Kentucky Lexington Kentucky USA
| | - Kassandra Opfar
- Department of Chemical and Materials Engineering University of Kentucky Lexington Kentucky USA
| | - Parker Nurick
- Department of Chemical and Materials Engineering University of Kentucky Lexington Kentucky USA
| | - Isabel C. Escobar
- Department of Chemical and Materials Engineering University of Kentucky Lexington Kentucky USA
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17
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Aryanti PTP, Nugroho FA, Widiasa IN, Sutrisna PD, Wenten IG. Preparation of highly selective PSf
/
ZnO
/
PEG400 tight ultrafiltration membrane for dyes removal. J Appl Polym Sci 2022. [DOI: 10.1002/app.52779] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
| | - Febrianto Adi Nugroho
- Chemical Engineering Department, Faculty of Engineering Universitas Jenderal Achmad Yani Cimahi Indonesia
| | - I Nyoman Widiasa
- Chemical Engineering Department Universitas Diponegoro Semarang Indonesia
| | | | - I Gede Wenten
- Department of Chemical Engineering Institut Teknologi Bandung Bandung Indonesia
- Research Center for Nanosciences and Nanotechnology Institut Teknologi Bandung Bandung Indonesia
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18
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Ho CC, Su JF. Boosting permeation and separation characteristics of polyethersulfone ultrafiltration membranes by structure modification via dual-PVP pore formers. POLYMER 2022. [DOI: 10.1016/j.polymer.2022.124560] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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19
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Liu H, Liao X, Ren Y. Effects of additive dosage and coagulation bath pH on amphoteric fluorocarbon special surfactant (FS-50) blend PVDF membranes. CHEMOSPHERE 2022; 287:132212. [PMID: 34547558 DOI: 10.1016/j.chemosphere.2021.132212] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2021] [Revised: 08/01/2021] [Accepted: 09/07/2021] [Indexed: 06/13/2023]
Abstract
Amphiphilic copolymers containing hydrophilic and hydrophobic blocks represented by surfactants have proven to be more effective for modifying membranes than hydrophilic copolymers. However, studies on the effects of additive and coagulation bath pH on the morphology and properties of surfactant-modified membranes have rarely been reported. Hence, this study aims to investigate the effects of the additive dosage and the coagulation bath pH on the mechanisms of phase inversion and performance improvement of amphoteric fluorocarbon special surfactant (FS-50) blended PVDF membranes. It was observed that the pure water flux increased from 114.68 LMH/bar of the original membrane M0 to 205.02 LMH/bar of the blend membrane M1, and then to 615.88 LMH/bar of the coagulation-bath-regulated membrane MPH9 with a high BSA rejection rate of 90.86%, showing a two-stage jump. The addition of FS-50 promoted the instantaneous phase inversion of the membrane, allowing the blend membrane to exhibit a higher proportion of pore characteristics and stronger permeability. After that, the mechanisms of the membrane phase inversion process affected by the coagulation bath pH were interpreted according to the pH-response characteristics of FS-50 in terms of charge repulsion effect and compressed double-electron layer effect. Furthermore, the cross-sectional morphology and the surface structure of the membrane prepared in acidic and alkaline coagulation baths were significantly affected by the pH of the coagulation bath, exhibiting different features. For one, the porosity of the membranes gradually decreased as the acidity and alkalinity of the coagulation bath increased, and the membrane MPH9 exhibited both maximum surface and overall porosity. For another, the coagulation bath pH did not negatively affect the contact angle, surface roughness and tensile strength of the membranes. Overall, adjusting the dosage of FS-50 and the pH of the coagulation bath is a promising approach to greatly enhance membrane performance.
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Affiliation(s)
- Hailong Liu
- School of Environmental Science and Resources, Shanxi University, No. 92 Wucheng Road, Taiyuan, 030006, China.
| | - Xiangjun Liao
- School of Environmental Science and Resources, Shanxi University, No. 92 Wucheng Road, Taiyuan, 030006, China
| | - Yuxia Ren
- School of Environmental Science and Resources, Shanxi University, No. 92 Wucheng Road, Taiyuan, 030006, China
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20
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Uchida Y, Uyama H, Minakuchi A, Matsunobu K, Yoshida M, Shirakawa Y. Phase-Field Simulation with Semi-Empirical and Effective Parameters in a Case Study from PVA Membrane Syntheses by Phase Separation and Drying Process. JOURNAL OF CHEMICAL ENGINEERING OF JAPAN 2021. [DOI: 10.1252/jcej.20we242] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Yuri Uchida
- Department of Chemical Engineering and Materials Science, Doshisha University
| | - Hiroshi Uyama
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University
| | | | | | - Mikio Yoshida
- Department of Chemical Engineering and Materials Science, Doshisha University
| | - Yoshiyuki Shirakawa
- Department of Chemical Engineering and Materials Science, Doshisha University
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21
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Durmaz EN, Willott JD, Mizan MMH, de Vos WM. Tuning the charge of polyelectrolyte complex membranes prepared via aqueous phase separation. SOFT MATTER 2021; 17:9420-9427. [PMID: 34609392 PMCID: PMC8549507 DOI: 10.1039/d1sm01199e] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2021] [Accepted: 09/29/2021] [Indexed: 05/19/2023]
Abstract
In this work, polyelectrolyte mixing ratio is studied as a tuning parameter to control the charge, and thus the separation properties of polyelectrolyte complex (PEC) membranes prepared via Aqueous Phase Separation (APS). In this approach, various ratios of poly(sodium 4-styrenesulfonate) (PSS) and poly(diallyldimethylammonium chloride) (PDADMAC) are mixed at high salinity and the PEC-based membranes are then precipitated using low salinity coagulation baths. The monomeric ratio of PSS to PDADMAC is varied from 1.0 : 0.8 through to 1.0 : 1.2. Obtained membranes have an asymmetric structure and function as nanofiltration membranes with on average 1 L m-2 h-1 bar-1 pure water permeance and <400 Da molecular weight cut-off (MWCO); except for the 1.0 : 1.2 membrane, where the water permeance was much higher (>20 L m-2 h-1 bar-1) with a similarly low MWCO. For the first time, we report the formation of both negatively and positively charged PSS-PDADMAC based APS membranes, as determined by both streaming potential and salt retention measurements. We hypothesize that the salt type used in the APS process plays a key role in the observed change in membrane charge. The point where the membrane charge transitions from negative to positive is found to be between the 1.0 : 0.9 and 1.0 : 1.0 PSS : PDADMAC ratios. The polyelectrolyte ratio not only affects membrane charge, but also their mechanical properties. The 1.0 : 0.9 and 1.0 : 1.0 membranes perform the best amongst the membranes prepared in this study since they have high salt retentions (up to 90% Na2SO4 and 75% MgCl2, respectively) and better mechanical stability. The higher permeance of the more charged, and thus more swollen, 1.0 : 0.8 and 1.0 : 1.2 membranes provide a relevant new direction for the development of APS-based PEC membranes.
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Affiliation(s)
- Elif Nur Durmaz
- Membrane Science and Technology, MESA+ Institute for Nanotechnology, University of Twente, Faculty of Science and Technology, P.O. Box 217, 7500 AE Enschede, The Netherlands.
| | - Joshua D Willott
- Membrane Science and Technology, MESA+ Institute for Nanotechnology, University of Twente, Faculty of Science and Technology, P.O. Box 217, 7500 AE Enschede, The Netherlands.
| | - Md Mizanul Haque Mizan
- Membrane Science and Technology, MESA+ Institute for Nanotechnology, University of Twente, Faculty of Science and Technology, P.O. Box 217, 7500 AE Enschede, The Netherlands.
| | - Wiebe M de Vos
- Membrane Science and Technology, MESA+ Institute for Nanotechnology, University of Twente, Faculty of Science and Technology, P.O. Box 217, 7500 AE Enschede, The Netherlands.
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22
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Barzegar T, Hassanajili S. Fabrication and characterization of dual layer
PEBAX‐SiO
2
/polyethersulfone nanocomposite membranes for separation of
CO
2
/
CH
4
gases. J Appl Polym Sci 2021. [DOI: 10.1002/app.51624] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Tahmineh Barzegar
- Department of Chemical Engineering, School of Chemical and Petroleum Engineering Shiraz University Shiraz Iran
| | - Shadi Hassanajili
- Department of Chemical Engineering, School of Chemical and Petroleum Engineering Shiraz University Shiraz Iran
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23
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Uebele S, Johann KS, Goetz T, Gronwald O, Ulbricht M, Schiestel T. Poly(ether sulfone) hollow fiber membranes prepared via nonsolvent‐induced phase separation using the green solvent Agnique®
AMD
3 L. J Appl Polym Sci 2021. [DOI: 10.1002/app.50935] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Sarah Uebele
- Innovation Field Membranes Fraunhofer Institute for Interfacial Engineering and Biotechnology IGB Stuttgart Germany
- Lehrstuhl für Technische Chemie II Universität Duisburg‐Essen Essen Germany
| | - Kai S. Johann
- Innovation Field Membranes Fraunhofer Institute for Interfacial Engineering and Biotechnology IGB Stuttgart Germany
| | - Tobias Goetz
- Innovation Field Membranes Fraunhofer Institute for Interfacial Engineering and Biotechnology IGB Stuttgart Germany
| | - Oliver Gronwald
- Advanced Materials & Systems, RAP/ES BASF SE Ludwigshafen am Rhein Germany
| | - Mathias Ulbricht
- Lehrstuhl für Technische Chemie II Universität Duisburg‐Essen Essen Germany
| | - Thomas Schiestel
- Innovation Field Membranes Fraunhofer Institute for Interfacial Engineering and Biotechnology IGB Stuttgart Germany
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24
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Lee WJ, Goh PS, Lau WJ, Ismail AF, Hilal N. Green Approaches for Sustainable Development of Liquid Separation Membrane. MEMBRANES 2021; 11:235. [PMID: 33806115 PMCID: PMC8064480 DOI: 10.3390/membranes11040235] [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: 02/27/2021] [Revised: 03/21/2021] [Accepted: 03/22/2021] [Indexed: 11/30/2022]
Abstract
Water constitutes one of the basic necessities of life. Around 71% of the Earth is covered by water, however, not all of it is readily available as fresh water for daily consumption. Fresh water scarcity is a chronic issue which poses a threat to all living things on Earth. Seawater, as a natural resource abundantly available all around the world, is a potential water source to fulfil the increasing water demand. Climate-independent seawater desalination has been touted as a crucial alternative to provide fresh water. While the membrane-based desalination process continues to dominate the global desalination market, the currently employed membrane fabrication materials and processes inevitably bring adverse impacts to the environment. This review aims to elucidate and provide a comprehensive outlook of the recent efforts based on greener approaches used for desalination membrane fabrication, which paves the way towards achieving sustainable and eco-friendly processes. Membrane fabrication using green chemistry effectively minimizes the generation of hazardous compounds during membrane preparation. The future trends and recommendations which could potentially be beneficial for researchers in this field are also highlighted.
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Affiliation(s)
- Wei Jie Lee
- Advanced Membrane Technology Research Centre, School of Chemical & Energy Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, Skudai 81310, Johore, Malaysia; (W.J.L.); (W.J.L.); (A.F.I.)
| | - Pei Sean Goh
- Advanced Membrane Technology Research Centre, School of Chemical & Energy Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, Skudai 81310, Johore, Malaysia; (W.J.L.); (W.J.L.); (A.F.I.)
| | - Woei Jye Lau
- Advanced Membrane Technology Research Centre, School of Chemical & Energy Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, Skudai 81310, Johore, Malaysia; (W.J.L.); (W.J.L.); (A.F.I.)
| | - Ahmad Fauzi Ismail
- Advanced Membrane Technology Research Centre, School of Chemical & Energy Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, Skudai 81310, Johore, Malaysia; (W.J.L.); (W.J.L.); (A.F.I.)
| | - Nidal Hilal
- Water Research Centre, New York University Abu Dhabi (NYUAD), Saadiyat Marina District, Abu Dhabi PO Box 129188, United Arab Emirates
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25
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Ho CC, Su JF, Cheng LP. Fabrication of high-flux asymmetric polyethersulfone (PES) ultrafiltration membranes by nonsolvent induced phase separation process: Effects of H2O contents in the dope. POLYMER 2021. [DOI: 10.1016/j.polymer.2021.123451] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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26
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Kratz K, Heuchel M, Weigel T, Lendlein A. Surface hydrophilization of highly porous poly(ether imide) microparticles by covalent attachment of poly(vinyl pyrrolidone). POLYMER 2020. [DOI: 10.1016/j.polymer.2020.123045] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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27
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Eco-friendly solvents and their mixture for the fabrication of polysulfone ultrafiltration membranes: An investigation of doctor blade and slot die casting methods. J Memb Sci 2020. [DOI: 10.1016/j.memsci.2020.118510] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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