JOURNAL OF MEMBRANE SCIENCE
·
2020
·
IF 7.183
Han Jiang,Tao Wang,Shuo Li,Zhi-Ping Zhao
Catalytically active membranes are the core components of the membrane reactors . Polysulfone (PSF) grafted with ionic liquids (ILs), PSF-DG-ILs, was prepared via introducing chloromethyl group into benzene ring of PSF, then grafting ILs, imidazolyl acid ILs ([(CH 2 ) 3 SO 3 HVIm]HSO 4 ), by chemical bonding. Then PSF-DG-ILs membranes were prepared by non-solvent induced phase separation technique for hydrolysis of inulin. The effects of coagulation bath, grafting degree, and various dope blending on structure, physico-chemical characters, and catalytic performance of membranes were evaluated. And results revealed that catalytic performance could be efficiently enhanced by choosing ethanol as coagulation compared with ethyl acetate, which was mainly attributed to surface segregation. Membrane mechanical strength decreased with the enhancing ILs grafting degree, while the catalytic performance increased. However, PSF-DG-ILs with high degree of ILs grafting lost its membrane-forming property. The mechanical and catalytic properties of the membrane were synergistically enhanced by blending PSF-DG-ILs polymers with high and low ILs grafting degree, then the resulting membranes broke the trade-off effect between mechanical strength and catalytic ability. Specifically, membrane fabricated by mixing the polymers with ILs grafting degree of 0.31 and 0.59 integrates optimized mechanical property and catalysis performance. The strength and strain of this blending membrane are 3.17 MPa and 14.10%. The average pore size and porosity are 215.5 nm and 46.2%. The yield of inulin hydrolysis can reach 88.22% with 20 wt% concentration of inulin at 75 °C using a flux of 23.4 L/(m 2 ·h). Therefore, the PSF-DG-ILs membrane displayed promising potential for the application in biomass conversion .
研究领域:
生物工程
·
材料科学
✓ 已验证
DOI
高影响因子
Journal of Water Process Engineering
·
2021
·
IF 5.485
Xiao-Tong Yuan,Lei Wu,Hong-Zhang Geng,Luda Wang,Wenyi Wang,Xue-Shuang Yuan,Benqiao He,Yi-Xuan Jiang,Yu-jie Ning,Ze-Ru Zhu,Jianxin Li
To enhance the anti-fouling performance of polysulfone (PSF) membranes, polyaniline (PANI) nanofibers were used as additives in a facile method to prepare PANI/PSF blended membranes (PPMs). The fouling behavior between the membrane and natural organic matters (NOM) pollutant was further analyzed by implementing extended Derjaguin–Landau–Verwey–Overbeek (XDLVO) theory. Overall, the performance of the PPMs was improved in comparison with that of the pristine PSF membrane. The pure water flux of the PPM increased to 2.4 times that of pristine PSF, reaching up to 169 L·m −2 h −1 bar −1 . The tensile strength of the hybrid membranes also increased after the incorporation of PANI nanofibers. In particular, in anti-fouling measurement, the PPMs exhibited enhanced anti-fouling properties for filtration serum albumin (BSA), humic acid (HA) and sodium alginate (SA) solutions. The anti-fouling mechanism was analyzed by the interfacial interaction energy, which were obtained by applying the XDLVO theory. Results confirmed that there are reduced attractive interaction energies between the PPMs and NOM pollutants molecules in comparison to the interaction between the pristine PSF and NOM pollutants molecules.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2019
·
IF 3.131
Jin Zhou,Heng-Li He,Fei Sun,Yu Su,Hai-Yin Yu,Jia-Shan Gu
To reduce the structural parameter of composite polyamide (PA) forward osmosis membrane , the support polysulfone (PSf) was prepared by blending PSf/PSf-g-methoxypolyethylene glycol (PSf/PSf-g-mPEG) with the mPEG weight molecular weights of 200, 500, 1000 and 1900 g/mol at the PSf/PSf-g-mPEG weight ratios of 4:1 and 9:1, respectively. The composite membranes were prepared as the following steps: (1) propargyl mPEGs preparation; (2) chloromethylation and azidation of PSf; (3) PSf-g-mPEG preparation via click chemistry; (4) PSf/PSf-g-mPEG blended support membrane preparation by phase separation; (5) polyamide active layer formation through interfacial polymerization between phenylenediamine and 1,3,5-benzenetricarbonyl trichloride on the support membrane. The successful synthesis of the polymers and preparation of the composite membranes were certified with Fourier transform infrared spectroscopy , nuclear magnetic resonance, X-ray photoelectron spectroscopy analysis, field emission scanning electron microscope and energy dispersive spectrometer. The pure water fluxes of the blended support membranes were sharply increased; the maximum pure water flux was gained for the PSf/PSf-g-mPEG500 blended membrane. For the composite polyamide (PA) membrane, the water flux was improved drastically, while the rejection to the salt remained unchanged in the reverse osmosis system; the pure water flux rose dramatically and the structure parameter ( S ) dropped significantly in the forward osmosis system.
研究领域:
材料科学
·
膜技术
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
CHINESE JOURNAL OF POLYMER SCIENCE
·
2017
·Vol. 35
·期 7
·846-856
·
IF 1.692
Liang Hong-qing,Li Hao-nan,Yu Hao-hao,Zhou Yong-ting,Xu Zhi-kang
Polysulfone (PSF) membranes have gained great attention in the fields of ultrafiltration, microfiltration, and thin film composite membranes for nanofiltration or reverse osmosis. For the first time, it is proposed to fabricate PSF membranes via thermally induced phase separation (TIPS) process using diphenyl sulfone (DPSO2) and polyethylene glycol (PEG) as mixed diluent. DPSO2 is chosen as a crystallizable diluent, while PEG is considered in terms of molecular weight ( M
w ) and dosage. We systematically investigate the interactions between PSF, DPSO2 and PEG based on the simulation calculations and solubility parameter theory. It is inferred that DPSO2 has an excellent compatibility with PSF, and the addition of PEG results in the ternary system thermodynamically less stable and then facilitates its liquid-liquid (L-L) phase separation. SEM images indicate that cellular-like pores are obvious throughout the membrane when the PEG content in the mixed diluent is 25 wt%−35 wt%. We can facilely manipulate the pore size, water flux and mechanical properties of PSF membranes with the dosage of PEG-200, the M
w
of PEG or the cooling rate. The successful application of TIPS can provide a new approach for structure manipulation and performance enhancement of PSF membranes.
研究领域:
材料科学
·
膜技术
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2018
·
IF 5.091
Li-Jing Zhu,Hai-Ming Song,Gang Wang,Zhi-Xiang Zeng,Qun-Ji Xue
Dual pH- and thermo-responsive polysulfone (PSf) membranes with three-dimensionally interconnected networks are fabricated by introducing poly(acrylic acid- co - N -isopropylacrylamide) (P(AA-NIPAm)) into the membrane surfaces and pore walls during membrane formation via a vapor-liquid induced phase separation (V-LIPS) process. After introducing the copolymers of P(AA-NIPAm), the fabricated membranes exhibit impressive open network pores on the surfaces, meanwhile their cross-sectional structure turns from classical asymmetric finger-like structure into bi-continuous nanopores throughout the whole thickness of membrane, due to high solution viscosity and low mass transfer rate of VIPS process. Furthermore, pure water permeation tests show that the pure water permeation ( L p ) and the molecular weight cutoff (MWCO) of the fabricated PSf/P(AA-NIPAm) membranes increases sharply as the solution pH decreases from 12.5 to 1.5 and the feed temperature increases from 25 to 50 °C, attributing to the increasing pore size. With the decreasing mass ratio of AA to NIPAm, the pH-responsive coefficient decreases, while the temperature- responsive coefficient increases. In particular, for the fabricated membrane with the mass ratio of AA to NIPAm of 3 to 2, L p changes from ∼16.0 to ∼821.4 L m −2 h −1 bar −1 and MWCO increases from ∼223.1 to ∼1493.2 kDa, as the filtration experiments are operated with feed pH and temperature of 12.5/25 °C and 1.5/50 °C respectively. The results proposed in this study provide a novel mode for design and development dual responsive porous membranes in situ, which will enable good separation of various materials and expand the scope of membrane applications.
研究领域:
材料科学
·
分离技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2017
·
IF 4.233
Lijing Zhu,Haiming Song,Dawei Zhang,Gang Wang,Zhixiang Zeng,Qunji Xue
Polysulfone (PSf) membrane has been widely used in water separation and purification, although, membrane fouling is still a serious problem limiting its potential. We aim to improve the antifouling of PSf membranes via a very simple and efficient method. In this work, antifouling PSf membranes were fabricated via in situ cross-linked polymerization coupled with non-solvent induced phase separation. In brief, acrylic acid (AA) and vinyltriethoxysilane (VTEOS) were copolymerized in PSf solution, then directly casted into membranes without purification. With the increase of monomers concentration, the morphology of the as-cast membranes changed from a finger-like morphology to a fully sponge-like structure due to the increased viscosity and decreased precipitation rate of the polymer solutions . Meanwhile, the hydrophilicity and electronegativity of modified membranes were highly improved leading to inhibited protein adsorption and improved antifouling property. Furthermore, in order to further find out the different roles player by AA and VTESO, the modified membrane without VTEOS was prepared and characterized. The results indicated that AA is more effective in the membrane hydrophilicity improvement, VTEOS is more crucial to improve membrane stability. This work provides valuable guidance for fabricating PSf membranes with hydrophilicity and antifouling property via in situ cross-linked polymerization.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2020
·
IF 7.183
Ning Zhang,Wenxu Qi,Lili Huang,En Jiang,Zhiying Li,Yang Luo,Xiaopeng Zhang,Junjiang Bao,Wenji Zheng,Gaohong He
There has been an increasing focus on the application of graphene oxide (GO) composite membrane in water treatment. For long-term operation in aqueous solutions, the diamine cross-linkers are widely used to stabilize the GO laminates on the supporting substrate. Polysulfone (PSf) is a superior candidate to support the GO laminates due to its highly chemical, mechanical and thermal stability, but its lack of active sites for cross-linking reaction leads to the easy exfoliation of the GO laminates from the PSf surface within a few hours. In this work, we report a novel fabrication approach to obtain a composite membrane with semi-interpenetrating network of cross-linked GO film in the PSf substrate coupled with a high hydration stability in the application of water treatment. The hydration swelling has little effect on the water permeability and dye rejection. The GO composite membrane exhibits excellent structure stability in water, acid, and alkaline solutions for several days or even longer. Such membranes show comparable water flux with the pristine GO composite membranes, and nearly complete rejection to dyes (i.e. methyl orange, methylene blue, congo red and reactive green). This work provides a novel and facile strategy for the fabrication of structure-enhanced GO composite membrane highly promising for practical applications.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2020
·
IF 4.939
Ting Pan,Baohua Yue,Liuming Yan,Guangbo Zeng,Yidong Hu,Shufa He,Wei Lu,Hongbin Zhao,Jiujun Zhang
Novel functionalized polysulfone with high local density of sulfonic acid groups, N , N -bis(sulfopropyl)aminyl-4-phenyl polysulfone or O , O′ -bis(sulfopropyl)resorcinol-5-yl-4-phenyl polysulfone (PSF-X-C 3 H 6 SO 3 H, X = N or O) are synthesized. These polymers are synthesized by bromination of polysulfone followed by Suzuki cross-coupling reaction to graft the aminophenyl groups and the dimethoxyphenyl groups onto the polymeric backbone, followed by introduction of the sulfopropyl groups via sultone ring-opening reaction. In addition, the composite membrane of PSF-O-C 3 H 6 SO 3 H and PSF-N-C 3 H 6 SO 3 H is also synthesized for comparison. The maximum proton conductivity of composite PSF-O-C 3 H 6 SO 3 H and PSF-N-C 3 H 6 SO 3 H reaches 46.66 mS cm −1 at 95 °C and 90% RH, higher than PSF-O-C 3 H 6 SO 3 H (42.06 mS cm −1 ) and PSF-N-C 3 H 6 SO 3 H (38.76 mS cm −1 ). Meanwhile, the composite exhibits compromised water uptake and swelling ratio, and low methanol permeability . The excellent overall performance of the composite is attributed to phase-separation between the hydrophilic and the hydrophobic subphases, and the hydrogen-bonding network developed in the hydrophilic subphases.
研究领域:
材料科学
·
化学工程
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
POLYMER
·
2020
·
IF 4.231
Mengdong Guo,Yue Huang,Jinfeng Cao,Shengyu Feng
The design and application of polysulfone–polysiloxanes block copolymers remains as a big challenge mainly owing to limited synthetic methods of sulfone prepolymers . In this contribution, vinyl-terminated poly (siloxane sulfone) (PSS) was applied as the hard segment to obtain novel polysulfone-polysiloxane multi-block copolymers by hydrosilylation with hydride-terminated polysiloxane (PDMS-H) for the first time. The new vinyl-functionalized sulfone prepolymers were prepared by ring-opening polymerization of benzylsulfonyl macroheterocyclosiloxane (BSM) using divinyltetramethyldisiloxane as end-capping reagent and KOH as a catalyst, which differs from the traditional condensation methods. Based on the polysulfone prepolymers, a better control of the molecular weight of the obtained polymers was achieved, affording relatively low PDI . Their morphological properties were investigated by atomic force microscopy (AFM) and small-angle X-ray scattering (SAXS), which revealed a mild microphase separation in the copolymers. Their surface and fluorescence properties can be effectively tuned by changing the PSS content. Besides, the obtained copolymers exhibited high hydrolytic and thermal-oxidative stability, and underwent a controlled and effective degradation into the starting benzylsulfonyl macroheterocyclosiloxane with a high conversion of 85% in the presence of KHSO 4 at room temperature . This strategy may provide new ideas for the design and application of new polysulfone–polysiloxanes block copolymers.
研究领域:
材料科学
·
高分子化学
✓ 已验证
DOI
高影响因子
RUSSIAN JOURNAL OF GENERAL CHEMISTRY
·
2023
·Vol. 93
·期 7
·1912-1919
·
IF 0.9
Shen D. X.,Li H.,Ji G. J.,Zhang Z. W.,Lu X. L.,Shen L.,Dang Y. R.,Song A. J.
Abstract The composite material based on polysulfone (PSF) membrane was synthesized as an adsorbent to treatment of dye wastewater. Here, a gold nanoparticle-functionalized PSF/PDA adsorbent (PSF/PDA-Au) was prepared by a three-step method, the polysulfone membrane was prepared by phase transformation method, then the membrane was immersed in 2 g/L dopamine solution for 24 h to obtain the dopamine-coated material, the product was eventually immersed in a chlorauric acid solution for 3 h. The chemical composition and morphology of the composite were characterized by scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectrometry (XPS), and measurement of contact angle. The efficiency of the adsorbent was evaluated by a series of experiments on the adsorption of the RhB dye. The reduced water contact angle of the adsorbent showed the improved hydrophilicity. Adsorption experiments have shown that PSF/PDA-Au effectively removes the RhB dye. At the same time, recirculation experiments showed that after four adsorption-desorption cycles, the removal rate can still reach 92.67%, indicating good stability of PSF/PDA-Au. Recyclability and convenient assembly of adsorbent using PSF flat membranes as support material make it an attractive candidate for removing dyes from wastewater.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2014
·Vol. 2
·期 27
·10410-10423
·
IF 0
Yang Yang,Lei Miao,Jiwen Hu,Guojun Liu,Yuanyuan Tu,Shudong Lin,Feng Liu,Fei Li,Yan Wu,Ganwei Zhang,Hailiang Zou
An amphiphilic binary graft copolymer polysulfone-graft-[poly(methyl methacrylate)-random-poly(acrylic acid)], PSf-g-(PMMA-r-PAA), was synthesized via a combination of atom transfer radical polymerization (ATRP) and click chemistry. This copolymer and polysulfone (PSf) were used to prepare porous membranes through the phase inversion method, which involved dissolving the polymers in a common solvent N-methyl pyrrolidone (NMP), casting the solution onto a glass plate to obtain a film, and subsequently immersing this film into a coagulant (a mixture of dimethylformamide and water at a given pH). The surfaces of the membrane and its pore walls were covered by the copolymer, and these surfaces were enriched with PAA domains due to the immiscibility of PAA and PSf and the miscibility of PMMA and PSf. More specifically, while the hydrophobic PMMA component served as an anchor to fix the graft copolymer onto the PSf bulk substrate, the hydrophilic PAA component assembled and became exposed at the surfaces of the membrane and the pore walls. Factors influencing this surface AA concentration or carboxyl group content (CGC) enrichment and the surface and pore morphologies of the membranes include the ratio between the amount of the copolymer and PSf in the mixture, the solvent quality of the coagulant for PSf, and the temperature as well as the pH of the coagulant. These factors have been systematically adjusted to optimize the hydrophilization of the PSf membrane and the resultant membranes have been characterized by water contact angle (WCA) measurements, scanning electron microscopy (SEM), atomic force microscopy (AFM), and X-ray photoelectron spectroscopy (XPS). Optimization of the phase inversion process yielded membranes with nearly complete surface coverage by PAA, even when the graft copolymer represented only 8 wt% of the membrane's composition. The hydrophilized membranes exhibited increased water flux and even pH-responsive water flow without adversely affecting their mechanical properties. In addition, these hydrophilic membranes exhibited long-term stability. Therefore, this novel binary amphiphilic graft copolymer-based approach for membrane modification may be of commercial value.
研究领域:
材料科学
·
化学工程
·
膜技术
✓ 已验证
DOI
Scientific Reports
·
2018
·Vol. 8
·期 1
·1-13
·
IF 4.122
Zheng Ke,Zhou Shaoqi,Zhou Xuan
A low-cost sulfonated polysulfone (SPSU)/poly(vinyl chloride) (PVC) substrate based high-performance thin-film composite (TFC) forward osmosis (FO) membrane was fabricated in this work. The results showed that the morphologies of the substrates were looser and more porous, and the porosity, pure water permeability, surface hydrophilicity, and average pore size of the substrates significantly improved after the SPSU was introduced into the PVC substrates. Furthermore, the SPSU/PVC-based TFC membranes exhibited rougher, looser and less crosslinked polyamide active layers than the neat PVC-based TFC membrane. The water permeability obviously increased, and the structure parameter dramatically declined. Moreover, the FO performance significantly improved (e.g. the water flux of TFC2.5 reached 25.53/48.37 LMH under FO/PRO mode by using 1.0 M NaCl/DI water as the draw/feed solution, while the specific salt flux exhibited a low value of 0.10/0.09 g/L). According to the results, it can be concluded that 2.5% of SPSU was the optimal blend ratio, which exhibited the lowest sulfonated material blend ratio compared to the data reported in the literature. Hence, this is a feasible and low-cost fabrication approach for high-performance FO membrane by using the cheap PVC and low blend-ratio SPSU as the membrane materials.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）