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Abd El-Lateef HM, Khalaf MM, Mohamed IM. XPS analysis, voltammetric, and impedance characteristics of novel heterogeneous biphosphates based on Cu/Ni for tri(ammonium) phosphate oxidation: A new direction for material processing in fuel technology. FUEL 2024; 356:129618. [DOI: 10.1016/j.fuel.2023.129618] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
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2
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Khalaf MM, Abd El-Lateef HM, Mohamed IMA. Novel electrocatalysts for ethylene glycol oxidation based on functionalized phosphates of bimetals Mn/Ni: Morphology, crystallinity, and electrocatalytic performance. SURFACES AND INTERFACES 2023; 38:102850. [DOI: 10.1016/j.surfin.2023.102850] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
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3
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Mohamed IMA, Wu XY, Zhu JH, El-Lateef HMA, Mousa HM, Xing F. Microstructure and interface analyses of novel external anode mortar incorporated calcined hydrotalcite nanoparticles towards an enhanced impressed current cathodic protection. J Taiwan Inst Chem Eng 2023. [DOI: 10.1016/j.jtice.2023.104803] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/18/2023]
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4
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Liu Y, Wang H, Cui Y, Chen N. Removal of Copper Ions from Wastewater: A Review. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2023; 20:3885. [PMID: 36900913 PMCID: PMC10001922 DOI: 10.3390/ijerph20053885] [Citation(s) in RCA: 16] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Revised: 02/15/2023] [Accepted: 02/20/2023] [Indexed: 06/18/2023]
Abstract
Copper pollution of the world's water resources is becoming increasingly serious and poses a serious threat to human health and aquatic ecosystems. With reported copper concentrations in wastewater ranging from approximately 2.5 mg/L to 10,000 mg/L, a summary of remediation techniques for different contamination scenarios is essential. Therefore, it is important to develop low-cost, feasible, and sustainable wastewater removal technologies. Various methods for the removal of heavy metals from wastewater have been extensively studied in recent years. This paper reviews the current methods used to treat Cu(II)-containing wastewater and evaluates these technologies and their health effects. These technologies include membrane separation, ion exchange, chemical precipitation, electrochemistry, adsorption, and biotechnology. Thus, in this paper, we review the efforts and technological advances made so far in the pursuit of more efficient removal and recovery of Cu(II) from industrial wastewater and compare the advantages and disadvantages of each technology in terms of research prospects, technical bottlenecks, and application scenarios. Meanwhile, this study points out that achieving low health risk effluent through technology coupling is the focus of future research.
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Affiliation(s)
- Yongming Liu
- Shandong Provincial Geo-Mineral Engineering Co., Ltd., Jinan 250013, China
| | - Haishuang Wang
- MOE Key Laboratory of Groundwater Circulation and Environmental Evolution, School of Water Resources and Environment, China University of Geosciences (Beijing), Beijing 100083, China
| | - Yuanyuan Cui
- Shandong Geological Exploration Institute of China Geology and Mine Bureau, Jinan 250013, China
| | - Nan Chen
- MOE Key Laboratory of Groundwater Circulation and Environmental Evolution, School of Water Resources and Environment, China University of Geosciences (Beijing), Beijing 100083, China
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5
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Mousa HM, Hamdy M, Yassin MA, El-Sayed Seleman MM, Abdel-Jaber G. Characterization of nanofiber composite membrane for high water flux and antibacterial properties. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.129655] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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6
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Alsaaed FAT, El-Lateef HMA, Khalaf MM, Mohamed IMA, Al-Omair MA, Gouda M. Drug Delivery System Based on Carboxymethyl Cellulose Containing Metal-Organic Framework and Its Evaluation for Antibacterial Activity. Polymers (Basel) 2022; 14:polym14183815. [PMID: 36145960 PMCID: PMC9503747 DOI: 10.3390/polym14183815] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Revised: 09/04/2022] [Accepted: 09/08/2022] [Indexed: 11/16/2022] Open
Abstract
A novel drug delivery system based on carboxymethyl cellulose containing copper oxide at melamine and zinc oxide at melamine framework (CMC-Cu-MEL and CMC-Zn-MEL) was prepared by the hydrothermal route. Synthesized nanocomposites were characterized by FTIR, SEM, and Raman spectroscopy. In addition, transmission electron microscopy (TEM) and selected area electron diffraction (SAED) images were applied to confirm the particle size and diffraction pattern of the prepared nanocomposites. Furthermore, the crystallinity of the synthesized CMC, CMC-Cu-MEL, and CMC-Zn-MEL materials was studied via X-ray diffraction (XRD). Estimating the transport exponent, which discloses the solvent diffusion and chain relaxation processes, and the Ritger–Peppas kinetic model theory were used to control the TC release mechanism from CMC-Cu-MEL and CMC-Zn-MEL. Additionally, the CMC-Cu-MEL and CMC-Zn-MEL containing TC had the highest activity index percents of 99 and 106% against S. aureus and 93 and 99% against E. coli, respectively. The tailored CMC-Cu-MEL and CMC-Zn-MEL for drug delivery systems are expected to be feasible and efficient.
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Affiliation(s)
- Fatimah A. T. Alsaaed
- Department of Chemistry, College of Science, King Faisal University, Al-Ahsa 31982, Saudi Arabia
| | - Hany M. Abd El-Lateef
- Department of Chemistry, College of Science, King Faisal University, Al-Ahsa 31982, Saudi Arabia
- Chemistry Department, Faculty of Science, Sohag University, Sohag 82524, Egypt
- Correspondence: or (H.M.A.E.-L.); (I.M.A.M.); (M.G.)
| | - Mai M. Khalaf
- Department of Chemistry, College of Science, King Faisal University, Al-Ahsa 31982, Saudi Arabia
- Chemistry Department, Faculty of Science, Sohag University, Sohag 82524, Egypt
| | - Ibrahim M. A. Mohamed
- Chemistry Department, Faculty of Science, Sohag University, Sohag 82524, Egypt
- Correspondence: or (H.M.A.E.-L.); (I.M.A.M.); (M.G.)
| | - Mohammed A. Al-Omair
- Department of Chemistry, College of Science, King Faisal University, Al-Ahsa 31982, Saudi Arabia
| | - Mohamed Gouda
- Department of Chemistry, College of Science, King Faisal University, Al-Ahsa 31982, Saudi Arabia
- Correspondence: or (H.M.A.E.-L.); (I.M.A.M.); (M.G.)
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7
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Zhang Y, Wang H, Gao K, Huang D, Hou L, Yang Y. Efficient removal of Cs(I) from water using a novel Prussian blue and graphene oxide modified PVDF membrane: Preparation, characterization, and mechanism. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 838:156530. [PMID: 35679934 DOI: 10.1016/j.scitotenv.2022.156530] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Revised: 05/06/2022] [Accepted: 06/03/2022] [Indexed: 06/15/2023]
Abstract
The Prussian blue (PB) blending membranes are promising candidates for the removal of trace radionuclide Cs+. Constructing a membrane with high flux and selectivity are challenging in its practical application. Here, a novel polyvinylidene fluoride (PVDF)-PB-graphene oxide (GO) modified membrane was fabricated via phase inversion for trace radionuclide cesium (137Cs) removal from water. Attenuated total reflectance-Fourier transform infrared spectroscopy (ATR-FTIR), X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM) were used to analyze chemical composition and morphology of the membrane, and the properties in terms of water flux and Cs+ removal were studied under different PB dosage, pH and co-existing ions conditions. It was observed that the addition of GO improved the dispersion of PB, and the PVDF-PB-GO membrane presented the highest Cs+ removal efficiency (99.6 %) and water flux (1638.2 LMH/bar) at pH = 7 with 0.1 wt% GO and 5 wt% PB. In addition, Langmuir and pseudo-second-order kinetics models fitted well for Cs+ adsorption by the PVDF-PB-GO membrane, illustrating that the Cs+ was removed via chemical adsorption dominated by Fe(CN)64- defect sites of PB and the oxygen groups of GO. Furthermore, the membrane showed a significant selectivity and reusability towards trace radioactive cesium, even in the presence of excess co-existing ions and in real water, which strongly verified that the modified membrane had application potential.
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Affiliation(s)
- Yanjun Zhang
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, No.19, Xinjiekouwai Street, Haidian District, Beijing 100875, PR China
| | - Huixian Wang
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, No.19, Xinjiekouwai Street, Haidian District, Beijing 100875, PR China
| | - Kexuan Gao
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, No.19, Xinjiekouwai Street, Haidian District, Beijing 100875, PR China
| | - Doudou Huang
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, No.19, Xinjiekouwai Street, Haidian District, Beijing 100875, PR China
| | - Li''an Hou
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, No.19, Xinjiekouwai Street, Haidian District, Beijing 100875, PR China; Xi'an High-Tech Institute, Xi'an 710025, PR China
| | - Yu Yang
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, No.19, Xinjiekouwai Street, Haidian District, Beijing 100875, PR China.
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Autopsy of Used Reverse Osmosis Membranes from the Largest Seawater Desalination Plant in Oman. MEMBRANES 2022; 12:membranes12070671. [PMID: 35877874 PMCID: PMC9322904 DOI: 10.3390/membranes12070671] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/29/2022] [Revised: 06/20/2022] [Accepted: 06/24/2022] [Indexed: 02/01/2023]
Abstract
The Barka desalination plant, commissioned in 2018, is the largest desalination plant in Oman. It has a capacity of 281 MLD with a reverse osmosis (RO) first-pass recovery rate of 46%. As part of the standard operator practice, a membrane autopsy was conducted to determine the cause of reductions in membrane performance. This study investigated fouled membranes (model No. SW30HRLE-440) from two different locations in the membrane rack. Various analytical methods were used to conduct the membrane autopsy. Field-emission scanning electron microscopy/energy-dispersive X-ray (FESEM/EDS) analyses of membrane samples showed major components of inorganic foulants. Moreover, black and salt-like crystals deposited on the membrane surface revealed significant carbon (C) components and oxygen (O), with a small amount of magnesium (Mg), chloride (Cl), sodium (Na), aluminium (Al), and calcium (Ca), respectively. A Fourier transform infrared (FTIR) analysis revealed the presence of long-chain hydrocarbons, carboxylic acids/esters, carbohydrates/polysaccharides, and inorganic foulants. Thermogravimetric analyses (TGA) of the membranes showed a high initial weight loss due to organic and inorganic fouling. X-ray photoelectron (XPS) analyses further confirmed the presence of inorganic and organic foulants on the membrane surfaces. Bacteria identification results showed the presence of Bacillus cereus and Bacillus marisflavi. This paper offers a detailed analysis of the foulants present on the reverse osmosis membrane surface and sub-surface before and after a cleaning process.
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Torre-Celeizabal A, Garea A, Casado-Coterillo C. Chitosan: Polyvinyl alcohol based mixed matrix sustainable coatings for reusing composite membranes in water treatment: Fouling characterization. CHEMICAL ENGINEERING JOURNAL ADVANCES 2022. [DOI: 10.1016/j.ceja.2021.100236] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
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10
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Elakkiya S, Arthanareeswaran G. Evaluation of membrane tailored with biocompatible halloysite‒polyaniline nanomaterial for efficient removal of carcinogenic disinfection by‒products precursor from water. ENVIRONMENTAL RESEARCH 2022; 204:112408. [PMID: 34800534 DOI: 10.1016/j.envres.2021.112408] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2021] [Revised: 11/12/2021] [Accepted: 11/13/2021] [Indexed: 06/13/2023]
Abstract
Humic acid (HA) is the main component of natural organic matter that generates carcinogenic by‒products during disinfection and its removal from water resources is challenging. Biocompatible halloysite (HNTs) nanomaterial decorated with polyaniline (HNTs‒PANI) was synthesized via polymerization technique. HNTs‒PANI was added to prepare polyethersulfone mixed matrix membranes (MMMs). The influence of HNTs‒PANI concentration on HA removal efficiency was studied by varying the HNTs‒PANI (0.5, 1 and 1.5 wt%). The characterization studies of MMMs revealed that the addition of HNTs‒PANI improved the morphology of the membranes, surface properties, chemical stability and thermal property. The amine and hydroxyl groups within the MMMs improved the membrane wettability. The addition of HNTs‒PANI within the MMMs had significantly enhanced the pure water flux and HA filtration. YHP2 MMM with 1 wt% of HNTs‒PANI demonstrated sieving coefficient of 0.10 and the highest HA removal efficiency of 91% greater than the neat PES membrane. Furthermore, the antifouling property of the MMMs was studied using HA as foulant. 1 wt% of HNTs‒PANI added MMM showed a high flux recovery ratio (94.9%) with low total fouling of 12% and low irreversible fouling of 5%, respectively. Thus, HNTs‒PANI was an efficient nanomaterial for enhancing the pure water flux, removal efficiency and antifouling property to treat water contaminated with HA.
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Affiliation(s)
- S Elakkiya
- Membrane Research Laboratory, Department of Chemical Engineering, National Institute of Technology, Tiruchirappalli, 620015, India
| | - G Arthanareeswaran
- Membrane Research Laboratory, Department of Chemical Engineering, National Institute of Technology, Tiruchirappalli, 620015, India.
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11
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Li J, Chen G, Luo S, Pang H, Gao C, Huang S, Liu S, Qin S. Tuning the microstructure of
SMA
/
CPVC
membrane for enhanced separation performance by adjusting the coagulation bath temperature. J Appl Polym Sci 2022. [DOI: 10.1002/app.52148] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Juan Li
- National Engineering Research Center for Compounding and Modification of Polymer Materials Guiyang China
| | - Guijing Chen
- National Engineering Research Center for Compounding and Modification of Polymer Materials Guiyang China
| | - Shanshan Luo
- National Engineering Research Center for Compounding and Modification of Polymer Materials Guiyang China
| | - Huixia Pang
- National Engineering Research Center for Compounding and Modification of Polymer Materials Guiyang China
| | - Chengtao Gao
- National Engineering Research Center for Compounding and Modification of Polymer Materials Guiyang China
| | - Shaowen Huang
- National Engineering Research Center for Compounding and Modification of Polymer Materials Guiyang China
| | - Shan Liu
- National Engineering Research Center for Compounding and Modification of Polymer Materials Guiyang China
- College of Materials and Energy Engineering Guizhou Institute of Technology Guiyang China
| | - Shuhao Qin
- National Engineering Research Center for Compounding and Modification of Polymer Materials Guiyang China
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12
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Huang X, Tian F, Chen G, Wang F, Weng R, Xi B. Preparation and Characterization of Regenerated Cellulose Membrane Blended with ZrO 2 Nanoparticles. MEMBRANES 2021; 12:42. [PMID: 35054568 PMCID: PMC8780500 DOI: 10.3390/membranes12010042] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Revised: 12/14/2021] [Accepted: 12/25/2021] [Indexed: 12/07/2022]
Abstract
It is of great significance to search for efficient, renewable, biodegradable and economical membrane materials. Herein, we developed an organic-inorganic hybrid regenerated cellulose membrane (ZrO2/BCM) with excellent hydrophilic and anti-fouling properties. The membrane was prepared by introducing ZrO2 particles into an N-Methylmorpholine-N-oxide(NMMO)/bamboo cellulose(BC) solution system by the phase inversion method. The physi-chemical structure of the membranes were characterized based on thermal gravimetric analysis (TGA), Fourier transform infrared spectroscopy (ATR-FTIR), field emission scanning electron microscopy (FE-SEM), and X-ray diffraction (XRD). The modified regenerated cellulose membrane has the excellent rejection of bovine serum albumin (BSA) and anti-fouling performance. The membrane flux of ZrO2/BCM is 321.49 (L/m2·h), and the rejection rate of BSA is 91.2%. Moreover, the membrane flux recovery rate after cleaning with deionized water was 90.6%. This new type of separation membrane prepared with green materials holds broad application potential in water purification and wastewater treatment.
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Affiliation(s)
- Xin Huang
- College of Ecological Environment and Urban Construction, Fujian University of Technology, Fuzhou 350118, China; (X.H.); (F.T.); (G.C.); (F.W.)
| | - Feng Tian
- College of Ecological Environment and Urban Construction, Fujian University of Technology, Fuzhou 350118, China; (X.H.); (F.T.); (G.C.); (F.W.)
| | - Guohong Chen
- College of Ecological Environment and Urban Construction, Fujian University of Technology, Fuzhou 350118, China; (X.H.); (F.T.); (G.C.); (F.W.)
| | - Fanan Wang
- College of Ecological Environment and Urban Construction, Fujian University of Technology, Fuzhou 350118, China; (X.H.); (F.T.); (G.C.); (F.W.)
| | - Rengui Weng
- College of Ecological Environment and Urban Construction, Fujian University of Technology, Fuzhou 350118, China; (X.H.); (F.T.); (G.C.); (F.W.)
| | - Beidou Xi
- Fujian Eco-Materials Engineering Research Center, Fujian University of Technology, Fuzhou 350118, China
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Facile preparation of antifouling nanofiltration membrane by grafting zwitterions for reuse of shale gas wastewater. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2021.119310] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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14
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Nurman S, Saiful S, Ginting B, Rahmi R, Marlina M, Wibisono Y. Synthesis of Polyurethane Membranes Derived from Red Seaweed Biomass for Ammonia Filtration. MEMBRANES 2021; 11:membranes11090668. [PMID: 34564485 PMCID: PMC8470907 DOI: 10.3390/membranes11090668] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/26/2021] [Revised: 08/18/2021] [Accepted: 08/27/2021] [Indexed: 11/24/2022]
Abstract
The development of membrane technology is rapidly increasing due to its numerous advantages, including its ease of use, chemical resistant properties, reduced energy consumption, and limited need for chemical additives. Polyurethane membranes (PUM) are a particular type of membrane filter, synthesized using natural organic materials containing hydroxy (-OH) groups, which can be used for water filtration, e.g., ammonia removal. Red seaweed (Rhodophyta) has specific molecules which could be used for PUM. This study aimed to ascertain PUM synthesis from red seaweed biomass (PUM-RSB) by using toluene diisocyanate via the phase inversion method. Red seaweed biomass with a particle size of 777.3 nm was used as starting material containing abundant hydroxy groups visible in the FTIR spectrum. The PUM-RSB produced was elastic, dry, and sturdy. Thermal analysis of the membrane showed that the initial high degradation temperature was 290.71 °C, while the residue from the thermogravimetric analysis (TGA) analysis was 4.88%. The PUM-RSB section indicates the presence of cavities on the inside. The mechanical properties of the PUM-RSB have a stress value of 53.43 MPa and a nominal strain of 2.85%. In order to optimize the PUM-RSB synthesis, a Box–Behnken design of Response Surface Methodology was conducted and showed the value of RSB 0.176 g, TDI 3.000 g, and glycerin 0.200 g, resulting from the theoretical and experimental rejection factor, i.e., 31.3% and 23.9%, respectively.
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Affiliation(s)
- Salfauqi Nurman
- Graduate School of Mathematics and Applied Sciences, Universitas Syiah Kuala, Banda Aceh 23111, Indonesia;
- Department of Agricultural Industrial Engineering, Faculty of Agricultural Technology, Universitas Serambi Mekkah, Banda Aceh 23245, Indonesia
- Politeknik Pelayaran Malahayati, Aceh Besar 23381, Indonesia
| | - Saiful Saiful
- Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Syiah Kuala, Banda Aceh 23111, Indonesia; (B.G.); (R.R.); (M.M.)
- Correspondence:
| | - Binawati Ginting
- Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Syiah Kuala, Banda Aceh 23111, Indonesia; (B.G.); (R.R.); (M.M.)
| | - Rahmi Rahmi
- Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Syiah Kuala, Banda Aceh 23111, Indonesia; (B.G.); (R.R.); (M.M.)
| | - Marlina Marlina
- Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Syiah Kuala, Banda Aceh 23111, Indonesia; (B.G.); (R.R.); (M.M.)
| | - Yusuf Wibisono
- Department of Bioprocess Engineering, Faculty of Agricultural Technology, Brawijaya University, Malang 65141, Indonesia;
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Chung YC, Gu GY, Park JE, Chun BC. Designing of new hydrophilic polyurethane using the graft-polymerized poly(acrylic acid) and poly(2-(dimethylamino)ethyl acrylate). JOURNAL OF POLYMER ENGINEERING 2021. [DOI: 10.1515/polyeng-2021-0107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Poly(acrylic acid) and poly(2-(dimethylamino)ethyl acrylate) chains were grafted to polyurethane (PU) using the graft-polymerization method in order to enhance the water compatibility of PU. The grafted chains were ionized into cationic or anionic form depending on the addition of strong acid or base. The grafted polymer chains did not affect the melting, crystallization, and glass transition of the soft segment of PU due to the softness of the chain. The cross-link density and solution viscosity increased due to the linking between the grafted chains, but the slight cross-linking did not disturb the solvation of PU. The slight cross-linking notably enhanced the maximum tensile stress and shape recovery capability, and the water compatibility of PU could be notably enhanced by the grafted ionized chains. Overall, the grafting of ionized polymeric chains onto PU could enhance the hydrophilicity of PU surface, tensile strength, and shape recovery capability.
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Affiliation(s)
- Yong-Chan Chung
- Department of Chemistry , The University of Suwon , Hwaseong 18323 , South Korea
| | - Gyo Young Gu
- Department of Chemistry , The University of Suwon , Hwaseong 18323 , South Korea
| | - Ji Eun Park
- School of Nano Engineering , Inje University , Gimhae 50834 , South Korea
| | - Byoung Chul Chun
- School of Nano Engineering , Inje University , Gimhae 50834 , South Korea
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16
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A green hybrid microextraction for sensitive determination of bisphenol A in aqueous samples using three different sorbents: Analytical and computational studies. Microchem J 2021. [DOI: 10.1016/j.microc.2020.105612] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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17
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A New Method for a Polyethersulfone-Based Dopamine-Graphene (xGnP-DA/PES) Nanocomposite Membrane in Low/Ultra-Low Pressure Reverse Osmosis (L/ULPRO) Desalination. MEMBRANES 2020; 10:membranes10120439. [PMID: 33352893 PMCID: PMC7766060 DOI: 10.3390/membranes10120439] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/22/2020] [Revised: 11/30/2020] [Accepted: 12/05/2020] [Indexed: 11/16/2022]
Abstract
Herein we present a two-stage phase inversion method for the preparation of nanocomposite membranes for application in ultra-low-pressure reverse osmosis (ULPRO). The membranes containing DA-stabilized xGnP (xGnP-DA-) were then prepared via dry phase inversion at room temperature, varying the drying time, followed by quenching in water. The membranes were characterized for chemical changes utilizing attenuated total reflectance-Fourier transform infrared spectroscopy (ATR-FTIR) and X-ray photoelectron spectroscopy (XPS). The results indicated the presence of new chemical species and thus, the inclusion of xGnP-DA in the polyethersulfone (PES) membrane matrix. Atomic force microscopy (AFM) showed increasing surface roughness (Ra) with increased drying time. Scanning electron microscopy (SEM) revealed the cross-sectional morphology of the membranes. Water uptake, porosity and pore size were observed to decrease due to this new synthetic approach. Salt rejection using simulated seawater (containing Na, K, Ca, and Mg salts) was found to be up to stable at <99.99% between 1–8 bars operating pressure. After ten fouling and cleaning cycles, flux recoveries of <99.5% were recorded, while the salt rejection was <99.95%. As such, ULPRO membranes can be successfully prepared through altered phase inversion and used for successful desalination of seawater.
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