1
|
Hardian R, Jia J, Diaz-Marquez A, Naskar S, Fan D, Shekhah O, Maurin G, Eddaoudi M, Szekely G. Design of Mixed-Matrix MOF Membranes with Asymmetric Filler Density and Intrinsic MOF/Polymer Compatibility for Enhanced Molecular Sieving. Adv Mater 2024:e2314206. [PMID: 38517323 DOI: 10.1002/adma.202314206] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/26/2023] [Revised: 03/03/2024] [Indexed: 03/23/2024]
Abstract
The separation of high-value-added chemicals from organic solvents is important for many industries. Membrane-based nanofiltration offers a more energy-efficient separation than the conventional thermal processes. Conceivably, mixed-matrix membranes (MMMs), encompassing metal-organic frameworks (MOFs) as fillers, are poised to promote selective separation via molecular sieving, synergistically combining polymers flexibility and fine-tuned porosity of MOFs. Nevertheless, conventional direct mixing of MOFs with polymer solutions results in underutilization of the MOF fillers owing to their uniform cross-sectional distribution. Therefore, in this work, a multizoning technique is proposed to produce MMMs with an asymmetric-filler density, in which the MOF fillers are distributed only on the surface of the membrane, and a seamless interface at the nanoscale. The design strategy demonstrates five times higher MOF surface coverage, which results in a solvent permeance five times higher than that of conventional MMMs while maintaining high selectivity. Practically, MOFs are paired with polymers of similar chemical nature to enhance their adhesion without the need for surface modification. The approach offers permanently accessible MOF porosity, which translates to effective molecular sieving, as exemplified by the polybenzimidazole and Zr-BI-fcu-MOF system. The findings pave the way for the development of composite materials with a seamless interface.
Collapse
Affiliation(s)
- Rifan Hardian
- Advanced Membranes & Porous Materials Center, Physical Sciences and Engineering Division (PSE), Sustainable Separation Engineering Laboratory, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia
| | - Jiangtao Jia
- Advanced Membranes & Porous Materials Center, Physical Sciences and Engineering Division (PSE), Functional Materials Design Discovery, and Development Laboratory (FMD3), King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia
| | | | - Supriyo Naskar
- ICGM, Univ. Montpellier, CNRS, ENSCM, Montpellier, 34293, France
| | - Dong Fan
- ICGM, Univ. Montpellier, CNRS, ENSCM, Montpellier, 34293, France
| | - Osama Shekhah
- Advanced Membranes & Porous Materials Center, Physical Sciences and Engineering Division (PSE), Functional Materials Design Discovery, and Development Laboratory (FMD3), King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia
| | - Guillaume Maurin
- ICGM, Univ. Montpellier, CNRS, ENSCM, Montpellier, 34293, France
| | - Mohamed Eddaoudi
- Advanced Membranes & Porous Materials Center, Physical Sciences and Engineering Division (PSE), Functional Materials Design Discovery, and Development Laboratory (FMD3), King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia
- Chemical Science Program, Physical Science and Engineering Division (PSE), King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia
| | - Gyorgy Szekely
- Advanced Membranes & Porous Materials Center, Physical Sciences and Engineering Division (PSE), Sustainable Separation Engineering Laboratory, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia
- Chemical Engineering Program, Physical Science and Engineering Division (PSE), King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia
| |
Collapse
|
2
|
Jia TZ, Feng R, Cui C, Chen Q, Cseri L, Zhou RF, Szekely G, Cao XL, Sun SP. Conductive nanofiltration membranes via in situ PEDOT-polymerization for electro-assisted membrane fouling mitigation. Water Res 2024; 252:121251. [PMID: 38324983 DOI: 10.1016/j.watres.2024.121251] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2023] [Revised: 01/15/2024] [Accepted: 01/31/2024] [Indexed: 02/09/2024]
Abstract
Nanofiltration (NF) membranes play a pivotal role in water treatment; however, the persistent challenge of membrane fouling hampers their stable application. This study introduces a novel approach to address this issue through the creation of a poly(3,4-ethylenedioxythiophene) (PEDOT)-based conductive membrane, achieved by synergistically coupling interfacial polymerization (IP) with in situ self-polymerization of EDOT. During the IP reaction, the concurrent generation of HCl triggers the protonation of EDOT, activating its self-polymerization into PEDOT. This interwoven structure integrates with the polyamide network to establish a stable selective layer, yielding a remarkable 90 % increase in permeability to 20.4 L m-2 h-1 bar-1. Leveraging the conductivity conferred by PEDOT doping, an electro-assisted cleaning strategy is devised, rapidly restoring the flux to 98.3 % within 5 min, outperforming the 30-minute pure water cleaning approach. Through simulations in an 8040 spiral-wound module and the utilization of the permeated salt solution for cleaning, the electro-assisted cleaning strategy emerges as an eco-friendly solution, significantly reducing water consumption and incurring only a marginal electricity cost of 0.055 $ per day. This work presents an innovative avenue for constructing conductive membranes and introduces an efficient and cost-effective electro-assisted cleaning strategy to effectively combat membrane fouling.
Collapse
Affiliation(s)
- Tian-Zhi Jia
- State Key Laboratory of Materials-Oriented Chemical Engineering, Jiangsu Collaborative Innovation Center of Membrane Materials and Membrane Processes, Jiangsu Future Membrane Technology Innovation Center, College of Chemical Engineering, Nanjing Tech University, Nanjing, 211816, China
| | - Ru Feng
- State Key Laboratory of Materials-Oriented Chemical Engineering, Jiangsu Collaborative Innovation Center of Membrane Materials and Membrane Processes, Jiangsu Future Membrane Technology Innovation Center, College of Chemical Engineering, Nanjing Tech University, Nanjing, 211816, China
| | - Chun Cui
- State Key Laboratory of Materials-Oriented Chemical Engineering, Jiangsu Collaborative Innovation Center of Membrane Materials and Membrane Processes, Jiangsu Future Membrane Technology Innovation Center, College of Chemical Engineering, Nanjing Tech University, Nanjing, 211816, China
| | - Qian Chen
- State Key Laboratory of Materials-Oriented Chemical Engineering, Jiangsu Collaborative Innovation Center of Membrane Materials and Membrane Processes, Jiangsu Future Membrane Technology Innovation Center, College of Chemical Engineering, Nanjing Tech University, Nanjing, 211816, China
| | - Levente Cseri
- Department of Chemical Engineering & Analytical Science, School of Engineering, The University of Manchester, The Mill, Sackville Street, Manchester, M1 3BB, United Kingdom
| | - Rong-Fei Zhou
- State Key Laboratory of Materials-Oriented Chemical Engineering, Jiangsu Collaborative Innovation Center of Membrane Materials and Membrane Processes, Jiangsu Future Membrane Technology Innovation Center, College of Chemical Engineering, Nanjing Tech University, Nanjing, 211816, China; Suzhou Laboratory, Suzhou 215100, China
| | - Gyorgy Szekely
- Department of Chemical Engineering & Analytical Science, School of Engineering, The University of Manchester, The Mill, Sackville Street, Manchester, M1 3BB, United Kingdom; Chemical Engineering Program, Physical Science and Engineering Division (PSE), King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia; Advanced Membranes and Porous Materials Center, Physical Science and Engineering Division (PSE), King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia
| | - Xue-Li Cao
- State Key Laboratory of Materials-Oriented Chemical Engineering, Jiangsu Collaborative Innovation Center of Membrane Materials and Membrane Processes, Jiangsu Future Membrane Technology Innovation Center, College of Chemical Engineering, Nanjing Tech University, Nanjing, 211816, China.
| | - Shi-Peng Sun
- State Key Laboratory of Materials-Oriented Chemical Engineering, Jiangsu Collaborative Innovation Center of Membrane Materials and Membrane Processes, Jiangsu Future Membrane Technology Innovation Center, College of Chemical Engineering, Nanjing Tech University, Nanjing, 211816, China; Suzhou Laboratory, Suzhou 215100, China.
| |
Collapse
|
3
|
Cavalcante J, Oldal DG, Peskov MV, Beke AK, Hardian R, Schwingenschlögl U, Szekely G. Biobased Interpenetrating Polymer Network Membranes for Sustainable Molecular Sieving. ACS Nano 2024; 18:7433-7443. [PMID: 38377377 PMCID: PMC10938919 DOI: 10.1021/acsnano.3c10827] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2023] [Revised: 02/05/2024] [Accepted: 02/15/2024] [Indexed: 02/22/2024]
Abstract
There is an urgent need for sustainable alternatives to fossil-based polymer materials. Through nanodomain engineering, we developed, without using toxic cross-linking agents, interpenetrating biopolymer network membranes from natural compounds that have opposing polarity in water. Agarose and natural rubber latex were consecutively self-assembled and self-cross-linked to form patchlike nanodomains. Both nano-Fourier transform infrared (nano-FTIR) spectroscopy and computational methods revealed the biopolymers' molecular-level entanglement. The membranes exhibited excellent solvent resistance and offered tunable molecular sieving. We demonstrated control over separation performance in the range of 227-623 g mol-1 via two methodologies: adjusting the molecular composition of the membranes and activating them in water. A carcinogenic impurity at a concentration of 5 ppm, which corresponds to the threshold of toxicological concern, was successfully purged at a negligible 0.56% pharmaceutical loss. The biodegradable nature of the membranes enables an environmentally friendly end-of-life phase; therefore, the membranes have a sustainable lifecycle from cradle to grave.
Collapse
Affiliation(s)
- Joyce Cavalcante
- Advanced
Membranes and Porous Materials Center, Physical Science and Engineering
Division (PSE), King Abdullah University
of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
- Materials
Science and Engineering Program, Physical Science and Engineering
Division (PSE), King Abdullah University
of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia
| | - Diana G. Oldal
- Advanced
Membranes and Porous Materials Center, Physical Science and Engineering
Division (PSE), King Abdullah University
of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
- Chemical
Engineering Program, Physical Science and Engineering Division (PSE), King Abdullah University of Science and Technology
(KAUST), Thuwal, 23955-6900, Saudi
Arabia
| | - Maxim V. Peskov
- Materials
Science and Engineering Program, Physical Science and Engineering
Division (PSE), King Abdullah University
of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia
| | - Aron K. Beke
- Advanced
Membranes and Porous Materials Center, Physical Science and Engineering
Division (PSE), King Abdullah University
of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
- Chemical
Engineering Program, Physical Science and Engineering Division (PSE), King Abdullah University of Science and Technology
(KAUST), Thuwal, 23955-6900, Saudi
Arabia
| | - Rifan Hardian
- Advanced
Membranes and Porous Materials Center, Physical Science and Engineering
Division (PSE), King Abdullah University
of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
| | - Udo Schwingenschlögl
- Materials
Science and Engineering Program, Physical Science and Engineering
Division (PSE), King Abdullah University
of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia
| | - Gyorgy Szekely
- Advanced
Membranes and Porous Materials Center, Physical Science and Engineering
Division (PSE), King Abdullah University
of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
- Materials
Science and Engineering Program, Physical Science and Engineering
Division (PSE), King Abdullah University
of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia
- Chemical
Engineering Program, Physical Science and Engineering Division (PSE), King Abdullah University of Science and Technology
(KAUST), Thuwal, 23955-6900, Saudi
Arabia
| |
Collapse
|
4
|
Hardian R, Szekely G. Multistep Transformation from Amorphous and Nonporous Fullerenols to Highly Crystalline Microporous Materials. ChemSusChem 2023; 16:e202202008. [PMID: 36377928 DOI: 10.1002/cssc.202202008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Revised: 11/14/2022] [Indexed: 06/16/2023]
Abstract
The structural and morphological properties of fullerenols upon exposure to heat treatment have yet to be understood. Herein, the temperature-driven structural and morphological evolutions of fullerenols C60 (OH) and C70 (OH) were investigated. In situ spectroscopic techniques, such as variable-temperature X-ray diffraction and coupled thermogravimetric Fourier-transform infrared analysis, were used to elucidate the structural transformation mechanism of fullerenols. Both fullerenols underwent four-step structural transformation upon heating and cooling, including amorphous-to-crystalline transition, thermal expansion, structural compression, and new crystal formation. Compared to the initially nonporous amorphous fullerenol, the crystalline product exhibited microporosity with a surface area of 114 m2 g-1 and demonstrated CO2 sorption capability. These findings show the potential of fullerene derivatives as adsorbents.
Collapse
Affiliation(s)
- Rifan Hardian
- Advanced Membranes and Porous Materials Center, Physical Science and Engineering Division (PSE), King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia
| | - Gyorgy Szekely
- Advanced Membranes and Porous Materials Center, Physical Science and Engineering Division (PSE), King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia
| |
Collapse
|
5
|
Ignacz G, Beke AK, Szekely G. Data-driven investigation of process solvent and membrane material on organic solvent nanofiltration. J Memb Sci 2023. [DOI: 10.1016/j.memsci.2023.121519] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/27/2023]
|
6
|
Chang YS, Kumari P, Munro CJ, Szekely G, Vega LF, Nunes S, Dumée LF. Plasticization mitigation strategies for gas and liquid filtration membranes - A review. J Memb Sci 2023. [DOI: 10.1016/j.memsci.2022.121125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
7
|
Topuz F, Oldal DG, Szekely G. Valorization of Polyethylene Terephthalate (PET) Plastic Wastes as Nanofibrous Membranes for Oil Removal: Sustainable Solution for Plastic Waste and Oil Pollution. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.2c01431] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Fuat Topuz
- Advanced Membranes and Porous Materials Center, Physical Science and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
| | - Diana G. Oldal
- Advanced Membranes and Porous Materials Center, Physical Science and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
| | - Gyorgy Szekely
- Advanced Membranes and Porous Materials Center, Physical Science and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
| |
Collapse
|
8
|
|
9
|
Alduraiei F, Kumar S, Liu J, Nunes SP, Szekely G. Rapid fabrication of fluorinated covalent organic polymer membranes for organic solvent nanofiltration. J Memb Sci 2022. [DOI: 10.1016/j.memsci.2022.120345] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
10
|
Ignacz G, Szekely G. Deep learning meets quantitative structure–activity relationship (QSAR) for leveraging structure-based prediction of solute rejection in organic solvent nanofiltration. J Memb Sci 2022. [DOI: 10.1016/j.memsci.2022.120268] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
|
11
|
Topuz F, Abdulhamid MA, Hardian R, Holtzl T, Szekely G. Nanofibrous membranes comprising intrinsically microporous polyimides with embedded metal-organic frameworks for capturing volatile organic compounds. J Hazard Mater 2022; 424:127347. [PMID: 34607032 DOI: 10.1016/j.jhazmat.2021.127347] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Here, we report the fabrication of nanofibrous air-filtration membranes of intrinsically microporous polyimide with metal-organic frameworks (MOFs). The membranes successfully captured VOCs from air. Two polyimides with surface areas up to 500 m2 g-1 were synthesized, and the impact of the porosity on the sorption kinetics and capacity of the nanofibers were investigated. Two Zr-based MOFs, namely pristine UiO-66 (1071 m2 g-1) and defective UiO-66 (1582 m2 g-1), were embedded into the nanofibers to produce nanocomposite materials. The nanofibers could remove polar formaldehyde and non-polar toluene, xylene, and mesitylene from air. The highest sorption capacity with 214 mg g-1 was observed for xylene, followed by mesitylene (201 mg g-1), toluene (142 mg g-1), and formaldehyde (124 mg g-1). The incorporation of MOFs drastically improved the sorption performance of the fibers produced from low-surface-area polyimide. Time-dependent sorption tests revealed the rapid sequestration of air pollutants owing to the intrinsic porosity of the polyimides and the MOF fillers. The porosity allowed the rapid diffusion of pollutants into the inner fiber matrix. The molecular level interactions between VOCs and polymer/MOFs were clarified by molecular modeling studies. The practicality of material fabrication and the applicability of the material were assessed through the modification of industrial N95 dust masks. To the best of our knowledge, this is the first successful demonstration of the synergistic combination of intrinsically microporous polyimides and MOFs in the form of electrospun nanofibrous membranes and their application for VOC removal.
Collapse
Affiliation(s)
- Fuat Topuz
- Advanced Membranes and Porous Materials Center, Physical Science and Engineering Division (PSE), King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia.
| | - Mahmoud A Abdulhamid
- Advanced Membranes and Porous Materials Center, Physical Science and Engineering Division (PSE), King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
| | - Rifan Hardian
- Advanced Membranes and Porous Materials Center, Physical Science and Engineering Division (PSE), King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
| | - Tibor Holtzl
- MTA-BME Computation Driven Chemistry Research Group, Department of Inorganic and Analytical Chemistry, Budapest University of Technology and Economics, Muegyetem rkp. 3, Budapest 1111, Hungary; Furukawa Electric Institute of Technology, Kesmark utca 28/A, Budapest 1158, Hungary
| | - Gyorgy Szekely
- Advanced Membranes and Porous Materials Center, Physical Science and Engineering Division (PSE), King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia.
| |
Collapse
|
12
|
Kumar S, Abdulhamid MA, Dinga Wonanke AD, Addicoat MA, Szekely G. Norbornane-based covalent organic frameworks for gas separation. Nanoscale 2022; 14:2475-2481. [PMID: 35103279 DOI: 10.1039/d1nr07593d] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Covalent organic frameworks (COFs) have emerged as a new class of crystalline porous materials with distinct structural features, such as uniform pore distribution, tunable architecture, and modifiable skeletons. COFs hold significant promise for application in gas separation because of their high Brunauer-Emmett-Teller surface area and narrow pore-size distribution, which enable selective separation. The porosity and separation performance of COFs have been finely tuned by structurally modifying the starting materials. Along this direction, for the first time, we prepared W-shaped diamines by catalytic arene-norbornene annulation (CANAL) and then treated them with trialdehyde (Tp) to synthesize novel β-ketoenamine-linked norbornane-based COFs, i.e., ND-COF-1 and ND-COF-2, via a solvothermal Schiff-base condensation approach. The pore interior was decorated with methyl groups attached to the norbornane unit of the COF skeleton. Both COFs exhibited high chemical stability in different organic solvents and acidic media. Additionally, they showed high CO2/N2 selectivity compared with those of previously reported COFs. Moreover, their CH4/N2 separation efficiency was investigated, and the results revealed that ND-COF-1 is more selective than ND-COF-2, which could be attributed to the less hindered pathway offered to methane gas molecules by the framework pore.
Collapse
Affiliation(s)
- Sushil Kumar
- Advanced Membranes and Porous Materials Center, Physical Science and Engineering Division (PSE), King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia.
| | - Mahmoud A Abdulhamid
- Advanced Membranes and Porous Materials Center, Physical Science and Engineering Division (PSE), King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia.
| | - A D Dinga Wonanke
- School of Science and Technology, Nottingham Trent University, Nottingham, UK
| | - Matthew A Addicoat
- School of Science and Technology, Nottingham Trent University, Nottingham, UK
| | - Gyorgy Szekely
- Advanced Membranes and Porous Materials Center, Physical Science and Engineering Division (PSE), King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia.
| |
Collapse
|
13
|
|
14
|
Alduraiei F, Manchanda P, Pulido B, Szekely G, Nunes SP. Fluorinated thin-film composite membranes for nonpolar organic solvent nanofiltration. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2021.119777] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
15
|
Abdulhamid MA, Hardian R, Szekely G. Waltzing around the stereochemistry of membrane crosslinkers for precise molecular sieving in organic solvents. J Memb Sci 2021. [DOI: 10.1016/j.memsci.2021.119724] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
16
|
Abdulhamid MA, Park SH, Zhou Z, Ladner DA, Szekely G. Surface engineering of intrinsically microporous poly(ether-ether-ketone) membranes: From flat to honeycomb structures. J Memb Sci 2021. [DOI: 10.1016/j.memsci.2020.118997] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
17
|
Topuz F, Kilic ME, Durgun E, Szekely G. Fast-dissolving antibacterial nanofibers of cyclodextrin/antibiotic inclusion complexes for oral drug delivery. J Colloid Interface Sci 2020; 585:184-194. [PMID: 33279701 DOI: 10.1016/j.jcis.2020.11.072] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Revised: 11/09/2020] [Accepted: 11/19/2020] [Indexed: 02/05/2023]
Abstract
HYPOTHESIS The widespread use of antibacterial electrospun nanofibers is mostly restricted due to their low loading capacity to carry antibiotics and the need to use toxic organic solvents to boost the antibiotic loading capacity. Nanofibers based on natural excipients, such as cyclodextrin (CD)-based nanofibers, can carry larger amounts of antibiotics while achieving better stability via inclusion complexation. EXPERIMENTS Nanofibers were produced by electrospinning and analyzed by electron microscopy to investigate the morphology of fibers. The formation of inclusion-complexation was analyzed by 1H NMR, FTIR, and XRD. Thermal analysis of the fibers was done using TGA. Ab initio modeling studies were done to calculate the complexation energies of antibiotics with CD. A disk-diffusion assay was used to test the antibacterial activity of the fibers. FINDINGS Bead-free antibacterial nanofibers with mean diameters between 340 and 550 nm were produced. The formation of inclusion complexes (IC) between the CD and the antibiotics was confirmed by FTIR and 1H NMR, which was further verified by the disappearance of the crystalline peaks of antibiotics as determined by XRD analysis. Thermal analysis of the nanofibers revealed that the formulations showed good antibiotic encapsulation (45-90%). Ab initio simulations revealed that gentamicin had the highest complexation energy, followed by kanamycin, chloramphenicol, and ampicillin. The antibacterial nanofibers rapidly dissolved in water and artificial saliva, successfully releasing the CD antibiotic complexes. The nanofibers showed high antibacterial activity against Gram-negative Escherichia coli.
Collapse
Affiliation(s)
- Fuat Topuz
- Advanced Membranes and Porous Materials Center, Physical Science and Engineering Division (PSE), King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia.
| | - Mehmet E Kilic
- Department of Materials Science and Engineering, Yonsei University, 03722 Seoul, Republic of Korea
| | - Engin Durgun
- UNAM-National Nanotechnology Research Center, Bilkent University, Ankara 06800, Turkey
| | - Gyorgy Szekely
- Advanced Membranes and Porous Materials Center, Physical Science and Engineering Division (PSE), King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia. http://www.szekelygroup.com
| |
Collapse
|
18
|
McNair R, Cseri L, Szekely G, Dryfe R. Asymmetric Membrane Capacitive Deionization Using Anion-Exchange Membranes Based on Quaternized Polymer Blends. ACS Appl Polym Mater 2020; 2:2946-2956. [PMID: 32905369 PMCID: PMC7469241 DOI: 10.1021/acsapm.0c00432] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Accepted: 06/01/2020] [Indexed: 06/11/2023]
Abstract
Membrane capacitive deionization (MCDI) for water desalination is an innovative technique that could help to solve the global water scarcity problem. However, the development of the MCDI field is hindered by the limited choice of ion-exchange membranes. Desalination by MCDI removes the salt (solute) from the water (solvent); this can drastically reduce energy consumption compared to traditional desalination practices such as distillation. Herein, we outline the fabrication and characterization of quaternized anion-exchange membranes (AEMs) based on polymer blends of polyethylenimine (PEI) and polybenzimidazole (PBI) that provides an efficient membrane for MCDI. Flat sheet polymer membranes were prepared by solution casting, heat treatment, and phase inversion, followed by modification to impart anion-exchange character. Scanning electron microscopy (SEM), atomic force microscopy (AFM), nuclear magnetic resonance (NMR), and Fourier-transform infrared (FTIR) spectroscopy were used to characterize the morphology and chemical composition of the membranes. The as-prepared membranes displayed high ion-exchange capacity (IEC), hydrophilicity, permselectivity and low area resistance. Due to the addition of PEI, the high density of quaternary ammonium groups increased the IEC and permselectivity of the membranes, while reducing the area resistance relative to pristine PBI AEMs. Our PEI/PBI membranes were successfully employed in asymmetric MCDI for brackish water desalination and exhibited an increase in both salt adsorption capacity (>3×) and charge efficiency (>2×) relative to membrane-free CDI. The use of quaternized polymer blend membranes could help to achieve greater realization of industrial scale MCDI.
Collapse
Affiliation(s)
- Robert McNair
- Department
of Chemical Engineering & Analytical Science, University of Manchester, The Mill, Sackville Street, Manchester, M1 3BB, U.K.
- Department
of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL, U.K.
| | - Levente Cseri
- Department
of Chemical Engineering & Analytical Science, University of Manchester, The Mill, Sackville Street, Manchester, M1 3BB, U.K.
| | - Gyorgy Szekely
- Department
of Chemical Engineering & Analytical Science, University of Manchester, The Mill, Sackville Street, Manchester, M1 3BB, U.K.
- Advanced
Membranes and Porous Materials Center (AMPMC), King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia
| | - Robert Dryfe
- Department
of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL, U.K.
- National
Graphene Institute, University of Manchester, Booth Street East, Manchester, M13 9PL, U.K.
- Henry
Royce Institute for Advanced Materials, University of Manchester, Oxford Road, Manchester, M13 9PL, U.K.
| |
Collapse
|
19
|
Kisszekelyi P, Hardian R, Vovusha H, Chen B, Zeng X, Schwingenschlögl U, Kupai J, Szekely G. Selective Electrocatalytic Oxidation of Biomass-Derived 5-Hydroxymethylfurfural to 2,5-Diformylfuran: from Mechanistic Investigations to Catalyst Recovery. ChemSusChem 2020; 13:3127-3136. [PMID: 32338429 PMCID: PMC7318667 DOI: 10.1002/cssc.202000453] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2020] [Revised: 04/21/2020] [Indexed: 05/12/2023]
Abstract
The catalytic transformation of bio-derived compounds, specifically 5-hydroxymethylfurfural (HMF), into value-added chemicals may provide sustainable alternatives to crude oil and natural gas-based products. HMF can be obtained from fructose and successfully converted to 2,5-diformylfuran (DFF) by an environmentally friendly organic electrosynthesis performed in an ElectraSyn reactor, using cost-effective and sustainable graphite (anode) and stainless-steel (cathode) electrodes in an undivided cell, eliminating the need for conventional precious metal electrodes. In this work, the electrocatalysis of HMF is performed by using green solvents such as acetonitrile, γ-valerolactone, as well as PolarClean, which is used in electrocatalysis for the first time. The reaction parameters and the synergistic effects of the TEMPO catalyst and 2,6-lutidine base are explored both experimentally and through computation modeling. The molecular design and synthesis of a size-enlarged C3 -symmetric tris-TEMPO catalyst are also performed to facilitate a sustainable reaction work-up through nanofiltration. The obtained performance is then compared with those obtained by heterogeneous TEMPO alternatives recovered by using an external magnetic field and microfiltration. Results show that this new method of electrocatalytic oxidation of HMF to DFF can be achieved with excellent selectivity, good yield, and excellent catalyst recovery.
Collapse
Affiliation(s)
- Peter Kisszekelyi
- Department of Organic Chemistry and TechnologyBudapest University of Technology and EconomicsSzent Gellert ter 4Budapest1111Hungary
| | - Rifan Hardian
- Advanced Membranes and Porous Materials CenterPhysical Science and Engineering Division (PSE)King Abdullah University of Science and TechnologyThuwal23955-6900Saudi Arabia
| | - Hakkim Vovusha
- Physical Science and Engineering Division (PSE)King Abdullah University of Science and TechnologyThuwal23955-6900Saudi Arabia
| | - Binglin Chen
- College of EnergyXiamen UniversityXiamen361102P. R. China
| | - Xianhai Zeng
- College of EnergyXiamen UniversityXiamen361102P. R. China
- Fujian Engineering and Research Center of Clean and High-Valued Technologies for Biomass, Xiamen Key Laboratory of High-Valued Utilization of BiomassXiamen UniversityXiamen361102P. R. China
| | - Udo Schwingenschlögl
- Physical Science and Engineering Division (PSE)King Abdullah University of Science and TechnologyThuwal23955-6900Saudi Arabia
| | - Jozsef Kupai
- Department of Organic Chemistry and TechnologyBudapest University of Technology and EconomicsSzent Gellert ter 4Budapest1111Hungary
| | - Gyorgy Szekely
- Advanced Membranes and Porous Materials CenterPhysical Science and Engineering Division (PSE)King Abdullah University of Science and TechnologyThuwal23955-6900Saudi Arabia
- Department of Chemical Engineering and Analytical ScienceThe University of ManchesterThe Mill, Sackville StreetManchesterM1 3BBUnited Kingdom
| |
Collapse
|
20
|
Kisszekelyi P, Hardian R, Vovusha H, Chen B, Zeng X, Schwingenschlögl U, Kupai J, Szekely G. Selective Electrocatalytic Oxidation of Biomass-Derived 5-Hydroxymethylfurfural to 2,5-Diformylfuran: from Mechanistic Investigations to Catalyst Recovery. ChemSusChem 2020; 13:3060. [PMID: 32537939 DOI: 10.1002/cssc.202001276] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Invited for this month's cover is the group of Gyorgy Szekely at King Abdullah University of Science and Technology (KAUST). The image shows the efficient TEMPO-based electrocatalytic transformation of biomass-based C6 -platform chemical HMF to DFF using non-precious-metal-based electrodes in green solvents with nanofiltration-enabled catalyst recovery. The Full Paper itself is available at 10.1002/cssc.202000453.
Collapse
Affiliation(s)
- Peter Kisszekelyi
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Szent Gellert ter 4, Budapest, 1111, Hungary
| | - Rifan Hardian
- Advanced Membranes and Porous Materials Center, Physical Science and Engineering Division (PSE), King Abdullah University of Science and Technology, Thuwal, 23955-6900, Saudi Arabia
| | - Hakkim Vovusha
- Physical Science and Engineering Division (PSE), King Abdullah University of Science and Technology, Thuwal, 23955-6900, Saudi Arabia
| | - Binglin Chen
- College of Energy, Xiamen University, Xiamen, 361102, P. R. China
| | - Xianhai Zeng
- College of Energy, Xiamen University, Xiamen, 361102, P. R. China
- Fujian Engineering and Research Center of Clean and High-Valued Technologies for Biomass, Xiamen Key Laboratory of High-Valued Utilization of Biomass, Xiamen University, Xiamen, 361102, P. R. China
| | - Udo Schwingenschlögl
- Physical Science and Engineering Division (PSE), King Abdullah University of Science and Technology, Thuwal, 23955-6900, Saudi Arabia
| | - Jozsef Kupai
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Szent Gellert ter 4, Budapest, 1111, Hungary
| | - Gyorgy Szekely
- Advanced Membranes and Porous Materials Center, Physical Science and Engineering Division (PSE), King Abdullah University of Science and Technology, Thuwal, 23955-6900, Saudi Arabia
- Department of Chemical Engineering and Analytical Science, The University of Manchester, The Mill, Sackville Street, Manchester, M1 3BB, United Kingdom
| |
Collapse
|
21
|
Alammar A, Park SH, Williams CJ, Derby B, Szekely G. Oil-in-water separation with graphene-based nanocomposite membranes for produced water treatment. J Memb Sci 2020. [DOI: 10.1016/j.memsci.2020.118007] [Citation(s) in RCA: 61] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
22
|
|
23
|
Fei F, Le Phuong HA, Blanford CF, Szekely G. Tailoring the Performance of Organic Solvent Nanofiltration Membranes with Biophenol Coatings. ACS Appl Polym Mater 2019; 1:452-460. [PMID: 32051963 PMCID: PMC7006363 DOI: 10.1021/acsapm.8b00161] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2018] [Accepted: 01/29/2019] [Indexed: 05/30/2023]
Abstract
This study reports a systematic investigation of fine-tuning the filtration performance of nanofiltration membranes with biophenol coatings to produce solvent-resistant membranes with 390-1550 g mol-1 molecular weight cutoff (MWCO) and 0.5-40 L m-2 h-1 bar-1 permeance. Six kinds of inexpensive, commercial biophenols (dopamine, tannic acid, vanillyl alcohol, eugenol, morin, and quercetin) were subjected to identical oxidant-promoted polymerization to coat six kinds of loose asymmetric membrane supports: polyimide (PI), polyacrylonitrile (PAN), polysulfone (PSf), polyvinylidene difluoride (PVDF), polybenzimidazole (PBI), and polydimethylsiloxane (PDMS). The coatings were characterized by Fourier-transform infrared spectroscopy (FTIR), and the morphologies were characterized by scanning electron microscopy (SEM) and atomic force microscopy (AFM). The long-term stability of 42 membranes were tested in 12 organic solvents, including emerging green solvents MeTHF and Cyrene. The biophenol coatings led to tighter membranes with a decrease in MWCO of 12-79% at a penalty of a 22-92% permeance decrease in acetone.
Collapse
Affiliation(s)
- Fan Fei
- School
of Materials, University of Manchester, Oxford Road, Manchester, M13 9PL, United Kingdom
- Manchester
Institute of Biotechnology, University of
Manchester, 131 Princess Street, Manchester M1 7DN, United Kingdom
| | - Hai Anh Le Phuong
- School
of Materials, University of Manchester, Oxford Road, Manchester, M13 9PL, United Kingdom
- School
of Chemical Engineering and Analytical Science, University of Manchester, The Mill, Sackville Street, Manchester M1 3BB, United Kingdom
| | - Christopher F. Blanford
- School
of Materials, University of Manchester, Oxford Road, Manchester, M13 9PL, United Kingdom
- Manchester
Institute of Biotechnology, University of
Manchester, 131 Princess Street, Manchester M1 7DN, United Kingdom
| | - Gyorgy Szekely
- School
of Chemical Engineering and Analytical Science, University of Manchester, The Mill, Sackville Street, Manchester M1 3BB, United Kingdom
| |
Collapse
|
24
|
Kisszekelyi P, Alammar A, Kupai J, Huszthy P, Barabas J, Holtzl T, Szente L, Bawn C, Adams R, Szekely G. Asymmetric synthesis with cinchona-decorated cyclodextrin in a continuous-flow membrane reactor. J Catal 2019. [DOI: 10.1016/j.jcat.2019.01.041] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
|
25
|
Zhao D, Kim JF, Ignacz G, Pogany P, Lee YM, Szekely G. Bio-Inspired Robust Membranes Nanoengineered from Interpenetrating Polymer Networks of Polybenzimidazole/Polydopamine. ACS Nano 2019; 13:125-133. [PMID: 30605324 DOI: 10.1021/acsnano.8b04123] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Marine mussel inspired polydopamine (PDA) has received increased attention due to its good thermal and chemical stability as well as strong adhesion on most materials. In this work, high-performance nanofiltration membranes based on interpenetrating polymer networks (IPN) incorporating PDA and polybenzimidazole (PBI) were developed for organic solvent nanofiltration (OSN). Generally, in order to obtain solvent stability, polymers need to be covalently cross-linked under harsh conditions, which inevitably leads to losses in permeability and mechanical flexibility. Surprisingly, by in situ polymerization of dopamine within a PBI support, excellent solvent resistance and permeance of polar aprotic solvents were obtained without covalent cross-linking of the PBI backbone due to the formation of an IPN. The molecular weight cutoff and permeance of the membranes can be fine-tuned by changing the polymerization time. Robust membrane performance was achieved in conventional and emerging green polar aprotic solvents (PAS) in a wide temperature range covering -10 °C to +100 °C. It was successfully demonstrated that the in situ polymerization of PDA-creating an IPN-can provide a simple and green alternative to covalent cross-linking of membranes. To elucidate the nature of the solvent stability, a detailed analysis was performed that revealed that physical entanglement along with strong secondary interaction synergistically enable solvent resistance with as low as 1-3% PDA content.
Collapse
Affiliation(s)
- Dan Zhao
- School of Chemical Engineering and Analytical Science , The University of Manchester , The Mill, Sackville street , Manchester M13 9PL , United Kingdom
| | - Jeong F Kim
- WCU Department of Energy Engineering , Hanyang University , Seoul 04763 , Republic of Korea
- Research Centre for Membranes, Advanced Materials Division , Korea Research Institute of Chemical Technology , Daejeon 34114 , Republic of Korea
| | - Gergo Ignacz
- School of Chemical Engineering and Analytical Science , The University of Manchester , The Mill, Sackville street , Manchester M13 9PL , United Kingdom
| | - Peter Pogany
- Department of Inorganic & Analytical Chemistry , Budapest University of Technology and Economics , Szent Gellert ter 4 , Budapest 1111 , Hungary
| | - Young Moo Lee
- WCU Department of Energy Engineering , Hanyang University , Seoul 04763 , Republic of Korea
| | - Gyorgy Szekely
- School of Chemical Engineering and Analytical Science , The University of Manchester , The Mill, Sackville street , Manchester M13 9PL , United Kingdom
| |
Collapse
|
26
|
Didaskalou C, Kupai J, Cseri L, Barabas J, Vass E, Holtzl T, Szekely G. Membrane-Grafted Asymmetric Organocatalyst for an Integrated Synthesis–Separation Platform. ACS Catal 2018. [DOI: 10.1021/acscatal.8b01706] [Citation(s) in RCA: 80] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Christos Didaskalou
- School of Chemical Engineering & Analytical Science, The University of Manchester, The Mill, Sackville Street, Manchester M13 9PL, United Kingdom
| | - Jozsef Kupai
- Department of Organic Chemistry & Technology, Budapest University of Technology & Economics, Szent Gellert ter 4, Budapest 1111, Hungary
| | - Levente Cseri
- School of Chemical Engineering & Analytical Science, The University of Manchester, The Mill, Sackville Street, Manchester M13 9PL, United Kingdom
- Department of Organic Chemistry & Technology, Budapest University of Technology & Economics, Szent Gellert ter 4, Budapest 1111, Hungary
| | - Julia Barabas
- Department of Inorganic & Analytical Chemistry, Budapest University of Technology & Economics, Szent Gellert ter 4, Budapest 1111, Hungary
| | - Elemer Vass
- Department of Organic Chemistry, Eotvos Lorand University, Pazmany Peter setany 1/A, Budapest 1117, Hungary
| | - Tibor Holtzl
- Department of Inorganic & Analytical Chemistry, Budapest University of Technology & Economics, Szent Gellert ter 4, Budapest 1111, Hungary
- Furukawa Electric Institute of Technology, Kesmark utca 28/A, Budapest 1158, Hungary
| | - Gyorgy Szekely
- School of Chemical Engineering & Analytical Science, The University of Manchester, The Mill, Sackville Street, Manchester M13 9PL, United Kingdom
| |
Collapse
|
27
|
Fei F, Cseri L, Szekely G, Blanford CF. Robust Covalently Cross-linked Polybenzimidazole/Graphene Oxide Membranes for High-Flux Organic Solvent Nanofiltration. ACS Appl Mater Interfaces 2018; 10:16140-16147. [PMID: 29672014 DOI: 10.1021/acsami.8b03591] [Citation(s) in RCA: 69] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Robust, readily scalable, high-flux graphene oxide (GO) mixed matrix composite membranes were developed for organic solvent nanofiltration. Hydroxylated polybenzimidazole was synthesized by N-benzylation of polybenzimidazole with 4-(chloromethyl)benzyl alcohol, which was confirmed by FTIR and NMR spectroscopy. Flat-sheet composite membranes comprising of polybenzimidazoles and 1 or 2 wt % GO were fabricated via conventional blade coating and phase inversion. Subsequently, GO was covalently anchored to the hydroxyl groups of the polymer using a diisocyanate cross-linking agent. The even distribution of GO in the membranes was mapped by visible-light microscopy. Hydroxylation and incorporation of GO in the polymer matrix increased the permeance up to 45.2 ± 1.6 L m-2 h-1 bar-1 in acetone, nearly 5 times higher than the unmodified benchmark membrane. The enhancement in permeance from the addition of GO did not compromise the solute rejection. The composite membranes were found to be tight in seven organic solvents, having molecular weight cut-offs (MWCO) as low as 140 g mol-1. Permeance increased with increasing solvent polarity, while rejection of a 420 g mol-1 pharmaceutical remained over 93%. The covalent anchoring resulted in robust composite membranes that maintained constant performance over 14 days in a continuous cross-flow configuration.
Collapse
Affiliation(s)
- Fan Fei
- School of Materials , University of Manchester , Oxford Road , Manchester , M13 9PL , United Kingdom
- Manchester Institute of Biotechnology , University of Manchester , 131 Princess Street , Manchester , M1 7DN , United Kingdom
| | - Levente Cseri
- School of Chemical Engineering and Analytical Science , University of Manchester , The Mill, Sackville Street , Manchester , M1 3BB , United Kingdom
| | - Gyorgy Szekely
- School of Chemical Engineering and Analytical Science , University of Manchester , The Mill, Sackville Street , Manchester , M1 3BB , United Kingdom
| | - Christopher F Blanford
- School of Materials , University of Manchester , Oxford Road , Manchester , M13 9PL , United Kingdom
- Manchester Institute of Biotechnology , University of Manchester , 131 Princess Street , Manchester , M1 7DN , United Kingdom
| |
Collapse
|
28
|
Leaper S, Abdel-Karim A, Faki B, Luque-Alled JM, Alberto M, Vijayaraghavan A, Holmes SM, Szekely G, Badawy MI, Shokri N, Gorgojo P. Flux-enhanced PVDF mixed matrix membranes incorporating APTS-functionalized graphene oxide for membrane distillation. J Memb Sci 2018. [DOI: 10.1016/j.memsci.2018.03.013] [Citation(s) in RCA: 101] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
29
|
|
30
|
Fodi T, Didaskalou C, Kupai J, Balogh GT, Huszthy P, Szekely G. Nanofiltration-Enabled In Situ Solvent and Reagent Recycle for Sustainable Continuous-Flow Synthesis. ChemSusChem 2017; 10:3435-3444. [PMID: 28737002 PMCID: PMC6032941 DOI: 10.1002/cssc.201701120] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/25/2017] [Revised: 07/20/2017] [Indexed: 05/16/2023]
Abstract
Solvent usage in the pharmaceutical sector accounts for as much as 90 % of the overall mass during manufacturing processes. Consequently, solvent consumption poses significant costs and environmental burdens. Continuous processing, in particular continuous-flow reactors, have great potential for the sustainable production of pharmaceuticals but subsequent downstream processing remains challenging. Separation processes for concentrating and purifying chemicals can account for as much as 80 % of the total manufacturing costs. In this work, a nanofiltration unit was coupled to a continuous-flow rector for in situ solvent and reagent recycling. The nanofiltration unit is straightforward to implement and simple to control during continuous operation. The hybrid process operated continuously over six weeks, recycling about 90 % of the solvent and reagent. Consequently, the E-factor and the carbon footprint were reduced by 91 % and 19 %, respectively. Moreover, the nanofiltration unit led to a solution of the product eleven times more concentrated than the reaction mixture and increased the purity from 52.4 % to 91.5 %. The boundaries for process conditions were investigated to facilitate implementation of the methodology by the pharmaceutical sector.
Collapse
Affiliation(s)
- Tamas Fodi
- School of Chemical EngineeringThe University of ManchesterThe Mill, Sackville StreetManchesterM13 9PLUnited Kingdom
- Department of Organic Chemistry and TechnologyBudapest University of Technology and EconomicsSzent Gellert ter 4Budapest1117Hungary
- Compound Profiling Laboratory, Gedeon Richter Plc.PO Box 27Budapest1475Hungary
| | - Christos Didaskalou
- School of Chemical EngineeringThe University of ManchesterThe Mill, Sackville StreetManchesterM13 9PLUnited Kingdom
| | - Jozsef Kupai
- Department of Organic Chemistry and TechnologyBudapest University of Technology and EconomicsSzent Gellert ter 4Budapest1117Hungary
| | - Gyorgy T. Balogh
- Compound Profiling Laboratory, Gedeon Richter Plc.PO Box 27Budapest1475Hungary
| | - Peter Huszthy
- Department of Organic Chemistry and TechnologyBudapest University of Technology and EconomicsSzent Gellert ter 4Budapest1117Hungary
| | - Gyorgy Szekely
- School of Chemical EngineeringThe University of ManchesterThe Mill, Sackville StreetManchesterM13 9PLUnited Kingdom
| |
Collapse
|
31
|
Razali M, Didaskalou C, Kim JF, Babaei M, Drioli E, Lee YM, Szekely G. Exploring and Exploiting the Effect of Solvent Treatment in Membrane Separations. ACS Appl Mater Interfaces 2017; 9:11279-11289. [PMID: 28276673 DOI: 10.1021/acsami.7b01879] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
It is well-known that solvent treatment and preconditioning play an important role in rejection and flux performance of membranes due to solvent-induced swelling and solvent adsorption. Investigations into the effect of solvent treatment are scarce and application specific, and were limited to a few solvents only. This study reveals the trend in solvent treatment based on solvent polarity in a systematic investigation with the aim to harness such effect for intensification of membrane processes. Nine solvents with polarity indices ranging from 0.1 to 5.8 (hexane to acetonitrile) were used as treatment and process solvents on commercial Borsig GMT-oNF-2, Evonik Duramem 300, and emerging tailor-made polybenzimidazole membranes. TGA-GCMS, HS-GC-FID, and NMR techniques were employed to better understand the effect of solvent treatment on the polymer matrix of membranes. In this work, apart from the solvent treatment's direct effect on the membrane performance, a subsequent indirect effect on the ultimate separation process was observed. Consequently, a pharmaceutical case study employing chlorhexidine disinfectant and antiseptic was used to demonstrate the effect of solvent treatment on the nanofiltration-based purification. It is shown that treatment of polybenzimidazole membranes with acetone resulted in a 25% increase in product recovery at 99% impurity removal. The cost of the process intensification is negligible in terms of solvent consumption, mass intensity, and processing time.
Collapse
Affiliation(s)
- Mayamin Razali
- School of Chemical Engineering & Analytical Science, The University of Manchester , The Mill, Sackville Street, Manchester M13 9PL, United Kingdom
| | - Christos Didaskalou
- School of Chemical Engineering & Analytical Science, The University of Manchester , The Mill, Sackville Street, Manchester M13 9PL, United Kingdom
| | - Jeong F Kim
- WCU Department of Energy Engineering, Hanyang University , 222 Wangsimni ro, Seongdong-gu, Seoul 04763, Republic of Korea
| | - Masoud Babaei
- School of Chemical Engineering & Analytical Science, The University of Manchester , The Mill, Sackville Street, Manchester M13 9PL, United Kingdom
| | - Enrico Drioli
- WCU Department of Energy Engineering, Hanyang University , 222 Wangsimni ro, Seongdong-gu, Seoul 04763, Republic of Korea
- Institute on Membrane Technology (ITM-CNR) , Via P. Bucci 17/C, 1-87030 Rende, Cosenza, Italy
| | - Young Moo Lee
- WCU Department of Energy Engineering, Hanyang University , 222 Wangsimni ro, Seongdong-gu, Seoul 04763, Republic of Korea
| | - Gyorgy Szekely
- School of Chemical Engineering & Analytical Science, The University of Manchester , The Mill, Sackville Street, Manchester M13 9PL, United Kingdom
| |
Collapse
|
32
|
Sulc R, Szekely G, Shinde S, Wierzbicka C, Vilela F, Bauer D, Sellergren B. Phospholipid imprinted polymers as selective endotoxin scavengers. Sci Rep 2017; 7:44299. [PMID: 28303896 PMCID: PMC5358689 DOI: 10.1038/srep44299] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2016] [Accepted: 02/07/2017] [Indexed: 11/23/2022] Open
Abstract
Herein we explore phospholipid imprinting as a means to design receptors for complex glycolipids comprising the toxic lipopolysaccharide endotoxin. A series of polymerizable bis-imidazolium and urea hosts were evaluated as cationic and neutral hosts for phosphates and phosphonates, the latter used as mimics of the phospholipid head groups. The bis-imidazolium hosts interacted with the guests in a cooperative manner leading to the presence of tight and well defined 1:2 ternary complexes. Optimized monomer combinations were subsequently used for imprinting of phosphatidic acid as an endotoxin dummy template. Presence of the aforementioned ternary complexes during polymerization resulted in imprinting of lipid dimers - the latter believed to crudely mimic the endotoxin Lipid A motif. The polymers were characterized with respect to template rebinding, binding affinity, capacity and common structural properties, leading to the identification of polymers which were thereafter subjected to an industrially validated endotoxin removal test. Two of the polymers were capable of removing endotoxin down to levels well below the accepted threshold (0.005 EU/mg API) in pharmaceutical production.
Collapse
Affiliation(s)
- Robert Sulc
- Faculty of Chemistry, Technical University of Dortmund, Germany
| | - Gyorgy Szekely
- Faculty of Chemistry, Technical University of Dortmund, Germany
- Hovione FarmaCiencia SA, R&D, Lisbon, Portugal
| | - Sudhirkumar Shinde
- Faculty of Chemistry, Technical University of Dortmund, Germany
- Department of Biomedical Sciences, Faculty of Health and Society, Malmö University, Malmö, Sweden
| | - Celina Wierzbicka
- Department of Biomedical Sciences, Faculty of Health and Society, Malmö University, Malmö, Sweden
| | - Filipe Vilela
- Faculty of Chemistry, Technical University of Dortmund, Germany
| | - David Bauer
- Department of Biomedical Sciences, Faculty of Health and Society, Malmö University, Malmö, Sweden
| | - Börje Sellergren
- Faculty of Chemistry, Technical University of Dortmund, Germany
- Department of Biomedical Sciences, Faculty of Health and Society, Malmö University, Malmö, Sweden
| |
Collapse
|
33
|
Pogány P, Razali M, Szekely G. Experimental and theoretical investigation of the complexation of methacrylic acid and diisopropyl urea. Spectrochim Acta A Mol Biomol Spectrosc 2017; 170:69-76. [PMID: 27419640 DOI: 10.1016/j.saa.2016.07.005] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2016] [Revised: 07/04/2016] [Accepted: 07/05/2016] [Indexed: 06/06/2023]
Abstract
The present paper explores the complexation ability of methacrylic acid which is one of the most abundant functional monomer for the preparation of molecularly imprinted polymers. Host-guest interactions and the mechanism of complex formation between methacrylic acid and potentially genotoxic 1,3-diisopropylurea were investigated in the pre-polymerization solution featuring both experimental (NMR, IR) and in silico density functional theory (DFT) tools. The continuous variation method revealed the presence of higher-order complexes and the appearance of self-association which were both taken into account during the determination of the association constants. The quantum chemical calculations - performed at B3LYP 6-311++G(d,p) level with basis set superposition error (BSSE) corrections - are in agreement with the experimental observations, reaffirming the association constants and justifying the validity of computational investigation of such systems. Furthermore, natural bond orbital analysis was carried out to appraise the binding properties of the complexes.
Collapse
Affiliation(s)
- Peter Pogány
- Department of Inorganic and Analytical Chemistry, Budapest University of Technology and Economics, Szent Géllert tér 4, Budapest 1111, Hungary; Spectroscopic Research Department, Gedeon Richter Plc., Gyömrői út 19-21, Budapest 1103, Hungary
| | - Mayamin Razali
- School of Chemical Engineering & Analytical Science, The University of Manchester, The Mill, Sackville Street, Manchester M13 9PL, United Kingdom
| | - Gyorgy Szekely
- School of Chemical Engineering & Analytical Science, The University of Manchester, The Mill, Sackville Street, Manchester M13 9PL, United Kingdom.
| |
Collapse
|
34
|
Le Phuong HA, Cseri L, Whitehead GFS, Garforth A, Budd P, Szekely G. Environmentally benign and diastereoselective synthesis of 2,4,5-trisubstituted-2-imidazolines. RSC Adv 2017. [DOI: 10.1039/c7ra11827a] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A one-pot, membrane-assisted synthesis of 2,4,5-trisubstituted-2-imidazolines was developed, and substituent effects, reaction kinetics and mechanism by DFT were studied.
Collapse
Affiliation(s)
- Hai Anh Le Phuong
- School of Chemical Engineering & Analytical Science
- The University of Manchester
- Manchester
- UK
| | - Levente Cseri
- School of Chemical Engineering & Analytical Science
- The University of Manchester
- Manchester
- UK
| | | | - Arthur Garforth
- School of Chemical Engineering & Analytical Science
- The University of Manchester
- Manchester
- UK
| | - Peter Budd
- School of Chemistry
- The University of Manchester
- Manchester
- UK
| | - Gyorgy Szekely
- School of Chemical Engineering & Analytical Science
- The University of Manchester
- Manchester
- UK
| |
Collapse
|
35
|
Kupai J, Razali M, Buyuktiryaki S, Kecili R, Szekely G. Long-term stability and reusability of molecularly imprinted polymers. Polym Chem 2016; 8:666-673. [PMID: 28496524 PMCID: PMC5361172 DOI: 10.1039/c6py01853j] [Citation(s) in RCA: 108] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2016] [Accepted: 11/23/2016] [Indexed: 01/22/2023]
Abstract
The effect of crosslinker, functional monomer and extraction on the long-term performance and degradation of molecularly imprinted polymers was investigated through adsorption studies, NMR, SEM, TGA and BET.
Molecularly imprinted materials are man-made mimics of biological receptors. Their polymer network has recognition sites complementary to a substrate in terms of size, shape and chemical functionality. They have diverse applications in various chemical, biomedical and engineering fields such as solid phase extraction, catalysis, drug delivery, pharmaceutical purification, (bio)sensors, water treatment, membrane separations and proteomics. The stability and reusability of molecularly imprinted polymers (IPs) have crucial roles in developing applications that are reliable, economic and sustainable. In the present article the effect of crosslinkers, functional monomers and conditions for template extraction on the long-term stability and reusability of IPs was systematically investigated. Adsorption capacity, selectivity, morphology and thermal decomposition of eleven different l-phenylalanine methyl ester imprinted polymers were studied to reveal performance loss over 100 adsorption–regeneration cycles. Furthermore, crosslinker and functional monomer specific reversible and irreversible decomposition of imprinted polymers as a result of adsorbent regeneration were investigated through adsorption studies, electron microscopy, N2 adsorption and thermogravimetric analysis. A decomposition mechanism was proposed and revealed using NMR spectroscopy. Solutions to avoid or overcome the limitations of the most common crosslinkers, functional monomers and extraction techniques were proposed and experimentally validated.
Collapse
Affiliation(s)
- Jozsef Kupai
- School of Chemical Engineering & Analytical Science , The University of Manchester , The Mill , Sackville Street , Manchester , M13 9PL and UK . .,Department of Organic Chemistry & Technology , Budapest University of Technology & Economics , Szent Gellert ter 4 , Budapest , 1117 , Hungary
| | - Mayamin Razali
- School of Chemical Engineering & Analytical Science , The University of Manchester , The Mill , Sackville Street , Manchester , M13 9PL and UK .
| | - Sibel Buyuktiryaki
- Yunus Emre Vocational School , Anadolu University , Eskisehir , 26470 , Turkey
| | - Rustem Kecili
- Yunus Emre Vocational School , Anadolu University , Eskisehir , 26470 , Turkey
| | - Gyorgy Szekely
- School of Chemical Engineering & Analytical Science , The University of Manchester , The Mill , Sackville Street , Manchester , M13 9PL and UK .
| |
Collapse
|
36
|
Schaepertoens M, Didaskalou C, Kim JF, Livingston AG, Szekely G. Solvent recycle with imperfect membranes: A semi-continuous workaround for diafiltration. J Memb Sci 2016. [DOI: 10.1016/j.memsci.2016.04.056] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
37
|
Taheri R, Razmjou A, Szekely G, Hou J, Ghezelbash GR. Biodesalination-On harnessing the potential of nature's desalination processes. Bioinspir Biomim 2016; 11:041001. [PMID: 27387607 DOI: 10.1088/1748-3190/11/4/041001] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Water scarcity is now one of the major global crises, which has affected many aspects of human health, industrial development and ecosystem stability. To overcome this issue, water desalination has been employed. It is a process to remove salt and other minerals from saline water, and it covers a variety of approaches from traditional distillation to the well-established reverse osmosis. Although current water desalination methods can effectively provide fresh water, they are becoming increasingly controversial due to their adverse environmental impacts including high energy intensity and highly concentrated brine waste. For millions of years, microorganisms, the masters of adaptation, have survived on Earth without the excessive use of energy and resources or compromising their ambient environment. This has encouraged scientists to study the possibility of using biological processes for seawater desalination and the field has been exponentially growing ever since. Here, the term biodesalination is offered to cover all of the techniques which have their roots in biology for producing fresh water from saline solution. In addition to reviewing and categorizing biodesalination processes for the first time, this review also reveals unexplored research areas in biodesalination having potential to be used in water treatment.
Collapse
Affiliation(s)
- Reza Taheri
- Department of Biotechnology, Faculty of Advanced Sciences and Technologies, University of Isfahan, Isfahan, Iran
| | | | | | | | | |
Collapse
|
38
|
Campbell J, Burgal JDS, Szekely G, Davies R, Braddock DC, Livingston A. Hybrid polymer/MOF membranes for Organic Solvent Nanofiltration (OSN): Chemical modification and the quest for perfection. J Memb Sci 2016. [DOI: 10.1016/j.memsci.2016.01.024] [Citation(s) in RCA: 86] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
39
|
Szekely G, Amores de Sousa MC, Gil M, Castelo Ferreira F, Heggie W. Genotoxic Impurities in Pharmaceutical Manufacturing: Sources, Regulations, and Mitigation. Chem Rev 2015; 115:8182-229. [DOI: 10.1021/cr300095f] [Citation(s) in RCA: 108] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Gyorgy Szekely
- School of Chemical Engineering & Analytical Science, The University of Manchester, The Mill, Sackville Street, Manchester M13 9PL, United Kingdom
| | - Miriam C. Amores de Sousa
- Department
of Bioengineering and Institute for Bioengineering and Biosciences
(iBB), Instituto Superior Técnico, Universidade de Lisboa, Avenida Rovisco Pais, 1049-001, Lisbon, Portugal
| | - Marco Gil
- Hovione FarmaCiencia SA, R&D, Sete Casas, 2674-506, Loures, Portugal
| | - Frederico Castelo Ferreira
- Department
of Bioengineering and Institute for Bioengineering and Biosciences
(iBB), Instituto Superior Técnico, Universidade de Lisboa, Avenida Rovisco Pais, 1049-001, Lisbon, Portugal
| | - William Heggie
- Hovione FarmaCiencia SA, R&D, Sete Casas, 2674-506, Loures, Portugal
| |
Collapse
|
40
|
Kupai J, Rojik E, Huszthy P, Szekely G. Role of chirality and macroring in imprinted polymers with enantiodiscriminative power. ACS Appl Mater Interfaces 2015; 7:9516-9525. [PMID: 25884100 DOI: 10.1021/acsami.5b00755] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Enantioselective discrimination of chiral amines is of great importance as their biological properties often differ. Therefore, here we report the development of synthetic receptors for their enantioselective recognition and pH-sensitive drug release. This paper reports the preparation of three pyridine and two benzene derivatives containing an allyloxy group [(S,S)-5, 6-9] as well as their evaluation as functional monomer anchors for chiral imprinting of amines. The enantiomeric enriching ability and controlled release of the imprinted polymers (IPs) were evaluated using racemic mixture of 1-(1-naphthyl)ethylamine hydrogen perchlorate (1). The effect of the enantiomeric purity of the template on the enantioseparation performance was investigated. Racemic template in combination with enantiomerically pure macrocyclic anchors and vice versa yields IPs with excellent enantiomeric recognition. In vitro drug delivery, enantiomeric enrichment and pH-sensitive release were investigated through kinetic models.
Collapse
Affiliation(s)
- Jozsef Kupai
- ‡Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Szent Gellért tér 4., Budapest H-1111, Hungary
| | - Eszter Rojik
- ‡Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Szent Gellért tér 4., Budapest H-1111, Hungary
| | - Peter Huszthy
- ‡Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Szent Gellért tér 4., Budapest H-1111, Hungary
| | - Gyorgy Szekely
- †School of Chemical Engineering and Analytical Science, The University of Manchester, The Mill, Sackville Street, Manchester M13 9PL, United Kingdom
| |
Collapse
|
41
|
Marchetti P, Jimenez Solomon MF, Szekely G, Livingston AG. Molecular separation with organic solvent nanofiltration: a critical review. Chem Rev 2014; 114:10735-806. [PMID: 25333504 DOI: 10.1021/cr500006j] [Citation(s) in RCA: 812] [Impact Index Per Article: 81.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Patrizia Marchetti
- Department of Chemical Engineering and Chemical Technology, Imperial College London , Exhibition Road, London SW7 2AZ, United Kingdom
| | | | | | | |
Collapse
|
42
|
Furnstahl P, Schweizer A, Nagy L, Szekely G, Harders M. A morphological approach to the simulation of forearm motion. Annu Int Conf IEEE Eng Med Biol Soc 2010; 2009:7168-71. [PMID: 19965092 DOI: 10.1109/iembs.2009.5334629] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Computer-based simulations support surgeons in preoperative planning of osteotomy and assessing the improvement of the forearm motion. To this end, an in-silico model of patient-specific forearm kinematics is required. In this paper we introduce a motion model of the forearm which is based on a patient's joint morphology, the form and shape of the joints. The morphology of the articulations is represented by 3-dimensional splines. In this way the gliding motion of the articulations is expressed analytically in a closed-form. Our algorithm was designed to work with available clinical planning data and requires minimal user interaction. This allows an integration in computer-aided planning systems that are operated by surgeons. The accuracy of the simulation results is verified via cadaver experiments.
Collapse
Affiliation(s)
- P Furnstahl
- Computer Vision Laboratory, ETH Zurich, Zurich, Switzerland
| | | | | | | | | |
Collapse
|
43
|
Abstract
The heating of tissues around implants during MRI can pose severe health risks, and careful evaluation is required for leads to be labeled as MR conditionally safe. A recent interlaboratory comparison study has shown that different groups can produce widely varying results (sometimes with more than a factor of 5 difference) when performing measurements according to current guidelines. To determine the related difficulties and to derive optimized procedures, two different generic lead structures have been investigated in this study by using state-of-the-art temperature and dosimetric probes, as well as simulations for which detailed uncertainty budgets have been determined. The agreement between simulations and measurements is well within the combined uncertainty. The study revealed that the uncertainty can be kept below 17% if appropriate instrumentation and procedures are applied. Optimized experimental assessment techniques can be derived from the findings presented herein.
Collapse
Affiliation(s)
- E Neufeld
- Foundation for Research on Information Technologies in Society (IT'IS), Zurich, Switzerland. Computer Vision Laboratory, Swiss Federal Institute of Technology (ETHZ), Zurich, Switzerland.
| | | | | | | |
Collapse
|
44
|
Hover R, Kosa G, Szekely G, Harders M. Data-Driven Haptic Rendering-From Viscous Fluids to Visco-Elastic Solids. IEEE Trans Haptics 2009; 2:15-27. [PMID: 27788093 DOI: 10.1109/toh.2009.2] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
In this article we present extensions of our earlier work on data-driven haptic rendering. Haptic feedback is generated directly by interpolating measured data. The selection of appropriate data dimensions is guided by the structure of the generalized Maxwell model. Material elasticity and viscosity are reproduced, including transient material effects like stress relaxation. All these properties can be nonlinear and mutually dependent. Besides visco-elastic bodies, we also apply our method to viscous fluids. We present results for several materials and compare the errors of the interpolated forces with perceptual thresholds reported in the literature. Moreover, we examine how these errors behave if different subjects perform the recordings on which the data-driven haptic feedback is based.
Collapse
|
45
|
Bajka M, Tuchschmid S, Bachofen D, Fink D, Szekely G, Harders M. Hysteroskopie: Operationstraining in der Virtuellen Realität. Geburtshilfe Frauenheilkd 2008. [DOI: 10.1055/s-0028-1088743] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
|
46
|
Fornaro J, Harders M, Keel M, Marincek B, Trentz O, Szekely G, Frauenfelder T. Interactive visuo-haptic surgical planning tool for pelvic and acetabular fractures. Stud Health Technol Inform 2008; 132:123-125. [PMID: 18391271] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Treatment of pelvic and acetabular fractures still poses a major challenge to trauma surgeons. We present a tool for intervention planning for such injuries using patient-specific models built from Computed Tomography data. The presented tool has three main parts: (1) the virtual reduction of the bone fragments, (2) the virtual adaptation of the osteosynthesis implants and (3) Finite Element Analysis (FEA) for testing mechanical behavior of the resulting intervention plan. Our tool provides an intuitive visuo-hapic interface designed to be used by trauma surgeons. The type and size of the osteosynthesis material can be determined and measurements like distances and angles relative to landmarks can be taken. First results of prospectively planned interventions show an excellent correlation and a significant gain in operation time.
Collapse
Affiliation(s)
- J Fornaro
- Institute of Diagnostic Radiology, University Hospital of Zurich, Zurich, Switzerland
| | | | | | | | | | | | | |
Collapse
|
47
|
Abstract
In this work a tissue aspiration method for the in vivo determination of biological soft tissue material parameters is presented. An explicit axisymmetric finite element simulation of the aspiration experiment is used together with a Levenberg-Marquardt algorithm to estimate the material model parameters in an inverse parameter determination process. An optimal fit of the simulated experiment and the real experiment is sought with the parameter estimation algorithm. Soft biological tissue is modelled as a viscoelastic, non-linear, nearly incompressible, isotropic continuum. Viscoelasticity is accounted for by a quasi-linear formulation. The aspiration method is validated experimentally with a synthetic material. In vivo (intra-operatively during surgical interventions) and ex vivo experiments were performed on human uteri.
Collapse
Affiliation(s)
- M Kauer
- Centre of Mechanics, ETH Zurich, 8092 Zurich, Switzerland.
| | | | | | | | | |
Collapse
|
48
|
|
49
|
|
50
|
Melegh B, Tóth G, Adamovich K, Szekely G, Gage DA, Bieber LL. Labeled trimethyllysine load depletes unlabeled carnitine in premature infants without evidence of incorporation. Biol Neonate 1999; 76:19-25. [PMID: 10364635 DOI: 10.1159/000014127] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
6-N-Trimethyl-[d9]-L-lysine (dTML), the labeled form of a mammalian carnitine precursor, was administered to two groups of premature infants. Although the urinary output of dTML significantly increased in the low-dose-treated group (100 micromol/day), this amount did not affect the urinary output or plasma levels of carnitine and carnitine esters. In the second group of infants, after administration of 500 micromol dTML the plasma-free carnitine concentration increased (from 9.95 +/- 0.63 to 12.9 +/- 0.87 nmol/ml, p > 0.05) with a significant increase in the urinary excretion of free carnitine on the day of dTML administration and on the posttreatment day (from 4.79 +/- 1.36 to 9.85 +/- 1.18 and to 17.5 +/- 2.31 micromol/day, respectively). Analysis of urine using fast atom bombardment mass spectrometry (FAB-MS) revealed only the presence of the dTML in the urine of the newborns; no change was detected in the relative abundance of any other carnitine precursor. Surprisingly, in the second group, which received the higher dose of dTML supplement, only the signal intensity of the unlabeled carnitine increased after dTML administration; no new peak appeared in the urine that would correspond to the de novo synthesized carnitine containing the stable isotope-labeled trimethyl group of dTML. Thus, the FAB-MS analysis clearly demonstrated that contrary to the likely prediction, the 270% extra free carnitine output was a consequence of a dose-dependent dTML-induced depletion of the free carnitine reserves from the newborns. The absence of the incorporation of the label from dTML into carnitine strongly suggests that circulating TML is not the precursor of carnitine in premature infants.
Collapse
Affiliation(s)
- B Melegh
- Department of Pediatrics, University Medical School of Pécs, University Medical School of Pécs, Hungary.
| | | | | | | | | | | |
Collapse
|