Polymers
·
2018
·Vol. 10
·期 6
·686
·
IF 2.935
Li-Fen Liu,Xing-Ling Gu,Xin Xie,Rui-Han Li,Chun-Yang Yu,Xiao-Xiao Song,Cong-Jie Gao
In this study, modification of polysulfone (PSf)/sulfonated polysulfone (SPSf) blended porous ultrafiltration (UF) support membranes was proposed to improve the reverse osmosis (RO) performance of aromatic polyamide thin film composite (TFC) membranes. The synergistic effects of solvent, polymer concentration, and SPSf doping content in the casting solution were investigated systematically on the properties of both porous supports and RO membranes. SEM and AFM were combined to characterize the physical properties of the membranes, including surface pore natures (porosity, mean pore radius), surface morphology, and section structure. A contact angle meter was used to analyze the membrane surface hydrophilicity. Permeate experiments were carried out to evaluate the separation performances of the membranes. The results showed that the PSf/SPSf blended porous support modified with 6 wt % SPSf in the presence of DMF and 14 wt % PSf had higher porosity, bigger pore diameter, and a rougher and more hydrophilic surface, which was more beneficial for fabrication of a polyamide TFC membrane with favorable reverse osmosis performance. This modified PSf/SPSf support endowed the RO membrane with a more hydrophilic surface, higher water flux (about 1.2 times), as well as a slight increase in salt rejection than the nascent PSf support. In a word, this work provides a new facile method to improve the separation performance of polyamide TFC RO membranes via the modification of conventional PSf porous support with SPSf.
研究领域:
材料科学
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环境工程
✓ 已验证
DOI
高影响因子
SOLID STATE IONICS
·
2016
·
IF 2.38
Baohua Yue,Guangbo Zeng,Yepei Zhang,Sheng Tao,Xiaoming Zhang,Liuming Yan
The synergetic proton conducting effect was observed in an acid-base composite composed of phosphonic acid functionalized polysulfone (PSF-PA) and triazolyl functionalized polysulfone (PSF-CH 2 -iPrOHTri), with three orders of magnitude improvement compared to that of the acidic or basic component. The maximum proton conductivity of 42.71 mS cm − 1 at 100 °C and 90% RH was observed in PSF-PA/PSF-CH 2 -iPrOHTri composite membrane composed of 75.0% PSF-CH 2 -iPrOHTri. In addition, the acid-base composite membrane showed higher thermal and oxidative stability , reduced hydrophilicity and methanol permeability , significantly improved mechanical strength . For the hydrated membranes of PSF-PA or PSF-CH 2 -iPrOHTri, the tensile strengths showed significant degradation with values only about halves of the dry membranes. On the other side, the tensile strength of the acid-base composite composed of 75.0% PSF-CH 2 -iPrOHTri showed only slight drop from 35.52 MPa to 30.59 MPa.
研究领域:
材料科学
·
燃料电池技术
✓ 已验证
产品关联
DOI
高影响因子
Membranes
·
2023
·Vol. 13
·期 9
·759
·
IF 4.2
Fanxin Kong,Lian You,Dingwen Zhang,Guangdong Sun,Jinfu Chen
Polysulfone (PSf) membranes typically have a negligible rejection of salts due to the intrinsic larger pore size and wide pore size distribution. In this work, a facile and scalable heat treatment was proposed to increase the salt rejection. The influence of heat treatment on the structure and performance of PSf membranes was systematically investigated. The average pore size decreased from 9.94 ± 5.5 nm for pristine membranes to 1.18 ± 0.19 nm with the increase in temperature to 50 °C, while the corresponding porosity decreased from 2.07% to 0.13%. Meanwhile, the thickness of the sponge structure decreased from 20.20 to 11.5 μm as the heat treatment temperature increased to 50 °C. The MWCO of PSf decreased from 290,000 Da to 120 Da, whereas the membrane pore size decreased from 5.5 to 0.19 nm. Correspondingly, the water flux decreased from 1545 to 27.24 L·m−2·h−1, while the rejection ratio increased from 3.1% to 74.0% for Na2SO4, from 1.3% to 48.2% for MgSO4, and from 0.6% to 23.8% for NaCl. Meanwhile, mechanism analysis indicated that the water evaporation in the membranes resulted in the shrinkage of the membrane pores and decrease in the average pore size, thus improving the separation performance. In addition, the desalting performance of the heat-treated membranes for real actual industrial wastewater was improved. This provides a facile and scalable route for PSf membrane applications for enhanced desalination.Keywords:PSf membrane;heat treatment;rejection performance
研究领域:
材料科学
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环境工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Membranes
·
2018
·Vol. 8
·期 4
·89
·
IF 0
Qin Liu,Xing Wu,Kaisong Zhang
To improve the filtration performance and properties of organic solvent nanofiltration (OSN) membranes, we firstly introduce nanoporous silica (SiO2) particles into the polyamide (PA) active layer of polysulfone (PSf) membrane via an interfacial polymerization process. Results from the study revealed that introduction of SiO2influenced the properties of PSf/PA-SiO2composite membranes by changing the surface roughness and hydrophilicity. Moreover, results also indicated that nanoporous SiO2modified membranes showed an improved performance of alcohols solvent permeance. The PSf/PA-SiO2composite membrane modified by 0.025 wt % of SiO2reached a permeance of 3.29 L m−2h−1bar−1for methanol and 0.42 L m−2h−1bar−1for ethanol, which were 20.0% and 13.5% higher than the control PSf membrane (permeance of 2.74 L m−2h−1bar−1for methanol and 0.37 L m−2h−1bar−1for ethanol). Conclusively, we demonstrated that the increase of membrane hydrophilicity and roughness were major factors contributing to the improved alcohols solvent permeance of the membranes.Keywords:silica;polysulfone;composite membrane;polyamide
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
PubMed
International Journal of Environmental Research and Public Health
·
2019
·Vol. 16
·期 23
·4659
·
IF 2.468
Zhen Shen,Wei Chen,Hang Xu,Wen Yang,Qing Kong,Ao Wang,Mingmei Ding,Juan Shang
Membrane fouling is still a critical issue for the application of ultrafiltration, which has been widely used in water treatment due to its efficiency and simplicity. In order to improve the antifouling property, a new 2D material MXene was used to fabricate composite ultrafiltration membrane with the approach of in situ embedment during the phase inversion process in this study. Scanning electron microscopy (SEM), atomic force microscopy (AFM), thermogravimetric analysis (TGA), energy dispersive spectroscopy (EDS), Fourier transform infrared spectroscopy (FTIR), water contact angle, bovine serum albumin rejection and porosity measurements were utilized to characterize the prepared membranes. Due to the hydrophilicity of the MXene, the composite membranes obtained higher hydrophilicity, confirmed by the decreased water contact angle. All the modified membranes had a high bovine serum albumin rejection above 90% while that of the pristine polysulfone membrane was 77.48%. The flux recovery ratio and the reversible fouling ratio of the membranes were also improved along with the increasing content of the MXene. Furthermore, the highest flux recovery ratio could also reach 76.1%. These indicated the good antifouling properties of MXene composite membranes. The enhanced water permeability and protein rejection and excellent antifouling properties make MXene a promising material for antifouling membrane modification.Keywords:MXene (Ti3C2Tx);polysulfone;hydrophilicity;ultrafiltration membrane;antifouling
研究领域:
材料科学
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环境工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2025
·
IF 3.9
Peijun Liu,Guan-Ping Jin,Yibo Fu,Bolin Liu,Xu Zhang,Huaitao Jiang
The development of extraction methods for rare and valuable rubidium (Rb) from the aqueous phase remains a challenge today. In this work, based on the promising physicochemical properties of polysulfone (PSF), the strong binding ability of zeolitic imidazolate framework-8 (ZIF-8) to Cu2+, as well as the excellent adsorption ability of potassium copper hexacyanoferrate (KCuFC) toward Rb+, a novel PSF/ZIF-8@KCuFC composite membrane was developed. The prepared composite membrane was applicable for efficient separation of Rb+ from the aqueous solution. The theoretical maximum adsorption capacity of Rb+ could reach 204.45 mg/g at 45 °C. The composite membrane possessed remarkable desorption and regeneration properties, which were demonstrated by a 0.5 mol/L NH4Cl/HCl solution and six adsorption/desorption cycles, respectively. Furthermore, the PSF/ZIF-8@KCuFC composite membrane could still uptake Rb+ with good effect from actual salt lake brine, and the recovery efficiency was maintained at about 38% during ten adsorption/desorption processes.
研究领域:
材料科学
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环境工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
npj Clean Water
·
2024
·Vol. 7
·期 1
·1-15
·
IF 10.4
Wu Zhuobin,Zheng Ke,Zhang Guichang,Huang Longwei,Zhou Shaoqi
Membrane distillation is an emerging wastewater treatment technology that harnesses low-grade heat as an energy source and exhibits potential for complete desalination. Nonetheless, two notable challenges hinder the practical application of this technology: membrane wetting and fouling. To counter these challenges, an innovative anti-fouling Janus membrane with asymmetric wettability was developed through electrospinning. The hydrophobic layer was formed using tetraethyl orthosilicate/polysulfone (PSF), and the superhydrophilic layer was created using polyvinylpyrrolidone (PVP)/PSF. A sensitive adhesion probe was used to assess the anti-fouling performance of the Janus membrane against oil. Molecular dynamics simulation suggested that PVP reduced the adsorption tendency of the membrane for humic acid (HA). Under experimental conditions involving saline water with HA and a saline oil–water emulsion, the non-Janus membrane suffered severe fouling, resulting in rapid water permeate flux decline. However, the Janus membrane demonstrated consistent permeate flux (26.84 LMH and 24.92 LMH) and an impressive salt rejection rate (> 99.99%). This study suggests that the Janus membrane, with its high permeate fluxes and remarkable resistance to fouling and wetting, could be an effective solution for wastewater treatment, with considerable potential for future application.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2019
·
IF 1.911
Hao Yang,Jiemei Zhou,Zhaogen Wang,Xiansong Shi,Yong Wang
Fouling resistance of ultrafiltration (UF) membranes is critical for their long-term usages in terms of stable performance, so convenient approaches to prepare fouling-resistant membranes are always anticipated. Herein, we demonstrate the facile fabrication of antifouling polysulfone- block -poly(ethylene glycol) (PSF- b -PEG, SFEG) composite membranes. SFEG layer was coated onto macroporous supports and cavitated by immerging them in acetone/ n -propanol following the mechanism of selective swelling induced pore generation. Thus-produced SFEG membranes possessed high permeance and excellent mechanical strength. Meanwhile, the structures and separation performances of the SFEG layers can be continuously tuned through simply changing swelling durations. More importantly, the hydrophilic PEG chains were spontaneously enriched onto the pore walls through swelling treatment, endowing intrinsic antifouling property to the SFEG membranes. Bovine serum albumin (BSA)/humic acid (HA) fouling tests proved the prominent fouling resistance of SFEG membranes, and the fouling resistance is expected to be long-standing because of the firm connection between PEG chains and PSF matrix by covalent bonding.
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
JOURNAL OF MEMBRANE SCIENCE
·
2018
·
IF 6.578
Mengqi Shi,Zhi Wang,Song Zhao,Jixiao Wang,Peng Zhang,Xingzhong Cao
We report a novel pathway for preparing polyamide (PA) thin-film composite (TFC) reverse osmosis (RO) membrane with high permselectivity by incorporating tannic acid (TA) into the polysulfone (PSf) support. The support and RO membrane were characterized systematically. The results showed that (1) the support surface was enriched with TA due to the high hydrophilcity of TA and (2) TA endowed the RO membrane with a thinner and more compact PA active layer. The influencing mechanism of TA on the PA layer formation was discussed. TA affected the formation of PA layer through changing the m-phenylenediamine (MPD) molecules absorption behavior and the formation of the nascent film. The RO membrane desalination performances for both brackish water and seawater were evaluated. Due to the thinner and more compact PA active layer, PSf/TA-RO (the membrane prepared on PSf/TA support) possessed a higher rejection and a comparative flux compared to PSf-RO (the membrane prepared on PSf support). This work provides an effective way for preparing high performance RO membranes via utilizing support to tailor the aqueous phase monomer absorption and the formation of the nascent film.
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
MATERIALS LETTERS
·
2023
·
IF 3
Cijian Zhang,Shicong Song,Qian Liu,Jiahui Li,Qi Cao,Shouhai Zhang,Xigao Jian,Zhihuan Weng
The innovative aerogel obtained by introducing bisphenol A-type polysulfone (PSF) as a precursor has excellent stability and can meet the need for thermal insulation at higher temperatures. In this study, PSF was modified by chloromethylation in a simple one-step process, and then PSF aerogels with tunable structural properties were tailored by changing the degree of chloromethyl and types of amino crosslinkers. This is the first report of the introduction of PSF into the aerogel field as far as we know. The density and volume shrinkage of the obtained aerogels were as low as 46.7 mg/cm 3 and 21.3%, respectively. Compared with aerogels made with triethylenetetramine as the cross-linking agent, aerogels obtained with polyetheramine D230 exhibited better structural stability, higher specific surface area and lower thermal conductivity (down to 0.036 W/mK), which was more favorable for the thermal insulating ability of the aerogel. These findings provide a new design idea for the selection of precursors for polymer-based aerogels.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2024
·
IF 8.4
Shang-yu Chen,Liang Li,Mai Feng,Ting Huang,Nan Zhang,Yong Wang
Enhancing the hydrophilicity/underwater superoleophobicity of fibrous membranes not only boosts their anti-contaminant property during oil/water separation, but also enhances their removal ability toward water-soluble pollutants. Here, a novel kind of electrospun polysulfone/titanium dioxide (PSF/TiO 2 ) composite membranes with UV-activated superwetting ability were fabricated by depositing spherical TiO 2 nanoparticles on the surface of PSF electrospun fibers through hydrothermal reaction . After activated by UV irradiation, the PSF/TiO 2 composite membranes (FPT-A-UV) exhibited amphiphilic features with water contact angle (WCA) and oil contact angle (OCA) approaching 0° in air while under-water oil contact angle (UWOCA) and under-oil water contact angle (UOWCA) exceeding 150°, respectively. The composite membranes showed high removal ability toward methylene blue (MB). Under the complex condition in purifying the emulsion containing MB, the removal ratio of MB achieved 90.8 % with water flux of 780.3 (L m −2 h −1 ). The FPT-A-UV composite membranes also exhibited good demulsification effects on various emulsified solutions. It is reasonable to expect that the composite membrane has satisfactory application prospects in wastewater purification, especially in harsh environments.
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
DESALINATION
·
2024
·
IF 8.3
Zongrui Song,Yujie Wu,Junjie Lv,Yanhong Ji,Mohammad Younas,Benqiao He
Loose nanofiltration (LNF) membranes have extensive applications in precision separation processes, however, synthesizing highly permselective LNF membranes is still a considerable obstacle. Nanobubble-assisted pore-forming method was adapted to prepare a highly perm-selective LNF membrane for the first time in this work, using polysulfone (PSf) as the membrane-forming material, azodicarbonamide (AC) as the reactive pore-forming agents, and NaOH solution as the coagulation and immersion baths. By leveraging nano-bubbles produced through the reaction between AC and NaOH without adding other pore-forming agents, the membrane-forming process of PSf was regulated. It was found that the PSf LNF membranes prepared in NaOH-solution coagulation and immersion baths exhibited significantly enhanced permeation performance without compromising the rejection. These results suggested that the coagulation and immersion post-treatment processes under NaOH solution had a great effect upon the structure and the property of the membranes. The LNF membrane prepared from 20 wt% PSf casting solution with 8 wt% AC achieved a permeation flux of 188.7 L m −2 h −1 , and a Congo red (CR, Mw =696 Da) rejection of over 99 %, while a rejection of NaCl below 7 %, showing a good separation for the CR/NaCl mixed solution. Additionally, the membrane exhibited favorable mechanical properties, with a tensile strength as high as 6.5 MPa and a fracture elongation reaching as much as 32.3 %. This work provided a novel approach for producing high-performance LNF membranes in treating dye wastewater.
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
危险品化学品经营许可证（带存储）