POLYMER TESTING
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2017
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IF 2.464
Jianxi Huang,Haijun Yang,Min Chen,Te Ji,Zhengchi Hou,Minghong Wu
Systematic study of FTIR spectra was carried out on the PES/PVP blends and PES-g-PVP copolymers . In the blends, no shift of carbonyl group absorbance was observed. In the copolymers, there was an occurrence of blue-shift that increases with the grafting degree, which can be used as a compelling evidence of PVP being grafted onto PES . This phenomenon was interpreted from the stereo-hindrance effect. Besides, as the intensity of carbonyl group absorbance increased proportionally with the degree of grafting obtained by elementary analysis, FTIR, a simple and easy tool, became feasible for the quantitative determination of PVP content in the graft copolymers . Calibration curves with high correlation coefficient were established from which the quantitative relationship between the intensity of carbonyl group absorbance normalized by a chosen internal reference and the grafting degree can be obtained.
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
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2022
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IF 3.898
Zhengchi Yin,Xiaoke Wu,Yanwei Yang,Huayu Zhang,Wangtao Li,Ruimin Zhu,Qiancheng Zheng,Zhengbao Wang
Compared to inorganic supports, polymeric supports can offer additional benefits, e.g. , easier processing and cheaper. However, the organic surface has weak adhesion to the zeolitic imidazolate frameworks (ZIFs) membrane layer, which usually requires complex surface modification or seeding. Herein, we demonstrate that a dual-layer asymmetric polymer support prepared by a simple spinning process is a good candidate for the preparation of ZIF-8 membrane. The inner layer of the support is an organic hollow fiber (PES) with finger-like pores, and the outer layer is a ZnO-PES composite layer with finger-like pores also. The ZnO-PES composite layer is expected to contain uniform ZnO crystals in the polymer matrix, i.e ., the ZnO particles in the skin layer of the support are not easy to fall off. Under the induction of ZnO particles in the outer layers, continuous ZIF-8 membranes can be prepared by single in-situ crystallization, showing good adhesion to the supports. The obtained ZIF-8 membranes show a H 2 permeance of 8.7 × 10 −8 mol·m −2 ·s −1 ·Pa −1 with a H 2 /N 2 ideal separation selectivity of 18.0. The design and preparation of this dual-layer polymer support is expected to promote the large-scale application of MOF membranes on polymer supports.
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Xiujuan Zhang,Zelin Liao,Xinlu Zhang,Xuehua Ruan,Hao Gong,Xiaokun Wang,Wenji Zheng,Yan Dai,Gaohong He
Excellent hemocompatibility and long-term stability against blood wetting are important properties required for artificial lung membrane, the core component in extracorporeal membrane oxygenator which is life-saving for patients with severe lung dysfunctions. Herein, novel hydrophilic modified polyethersulfone (PES) asymmetric membranes were synthesized via thermal cross-linking, and characterization via SEM, FTIR, 1 HNMR and surface water contact angle measurements demonstrated that the modified asymmetric membranes composing a dense layer with hydrophilic surface on top of a microporous support layer were successfully fabricated without any observed defects. Among all the modified membranes, PEGylated PES membrane exhibited the smoothest membrane surface, improved mechanical property, good gas permeability and the best performance in hemocompatibility in terms of blood coagulation, protein adsorption and platelet adhesion. Moreover, the PEGylated PES membrane showed excellent long-term stability in membrane surface wettability as well as long-term stable performance against blood fouling and wetting. This research work provides valuable insights and new idea into synthesizing membranes, with simple synthesis process, long lasting high hemocompatibility and stability against wetting, for application as artificial lung membranes.
研究领域:
材料科学
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生物医学工程
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膜技术
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产品关联
DOI
高影响因子
ACS Applied Polymer Materials
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2023
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IF 5
Tianya Chen,Hangcheng Zhu,Xinyi Chen,Shuang Zheng,Fugen Liang,Fei Yang,Shujuan Yang,Yong Zhang
Selectivity and antifouling of ultrafiltration (UF) membranes are major challenges in the separation and purification of biological proteins. This work reported that full-coverage spongy poly(ether sulfone) (PES) ultrafiltration membranes assisted by the self-cross-linking of N-hydroxyethyl acrylamide (HEAA) were fabricated via a phase inversion method at room temperature. The pore structure of the UF membrane from finger-like to coverage of the spongy structure occurred by increasing the content of HEAA, which is beneficial for size-selective separation of biomolecules. The optimized M4 membrane showed a high surface porosity with a uniform pore size of 30 nm, resulting in more than 99% protein rejection rate for immunoglobulin G (IgG) but less than 20% rejection for bovine serum albumin, confirming that the molecular weight cutoff is 100k Da. Furthermore, the fabricated PES composite ultrafiltration membranes showed excellent antifouling performance and flux recovery efficiency for proteins due to the hydrophilic group of HEAA. This study provides an intelligent strategy for fouling prevention and selective isolation of proteins.
研究领域:
材料科学
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生物工程
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化学工程
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产品关联
DOI
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
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2024
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IF 8.3
Kaixuan Lei,Wenzhen Qin,Shulin Bai,Jianfan Cao,Liang Chen
Improving the weak interfacial bonding of carbon fiber (CF)/polyetheretherketone (PEEK) composites is an extremely urgent need. Addressing this issue, sizing modification on CF surfaces is a conventional and effective method. In this work, polyethersulfone-polystyrene sulfonate sodium (PES-NaPSS) was successfully synthesized by UV illumination. A novel surfactant-free aqueous PES-NaPSS sizing agent was prepared by emulsion/solvent evaporation method to regulate the interface of CF/PEEK composites. From the XPS and SEM results, it can be seen that PES-NaPSS was uniformly coated on the CF surfaces, which introduced the reactive groups on the CF surfaces. The PES-NaPSS sizing agent exhibits good thermal performance and storage stability, meeting the needs for high temperature processing of CF/PEEK composites. Compared with the unsized CF/PEEK composites, the ILSS, flexural strength and modulus of the 0.9 wt% PES-NaPSS modified CF/PEEK composite are improved by 32.8 %, 40.3 % and 37.4 %, respectively. Accordingly, the mechanisms of the interface improvement are physical riveting, chain entanglement, chemical and physical interactions between the PES-NaPSS and PEEK matrix. This green and effective method of interface improvement will supply a prerequisite for the extensive application of CF/PEEK composites.
研究领域:
材料科学
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复合材料
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产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
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2022
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IF 7.968
Dongxue Yao,Fan Zhang,Guangli Feng,Yufeng Zhang,Jianqiang Meng
Loose nanofiltration membranes show great potential to realize the effective separation of dyes and salts but still show low capacity for treating textile wastewater due to low membrane flux . In this work, a high-flux hollow fiber nanofiltration membrane (HFNFM) for the separation of dyes and salts was fabricated through a simple one-step non-solvent induced phase separation (NIPS) method. A carboxylated polyethersulfone (PES-COOH) was synthesized by the polycondensation based on Williamson reaction using diallyl bisphenol sulfur as a commoner followed by the thio-ene reaction with thioglycolic acid. Then PES-COOH was blended with polysulfone (PSF) for hollow fiber spinning based on the NIPS method. The effects of the ratio of PSF to PES-COOH on the membrane structure and performance were studied with scanning electron microscope (SEM), differential scanning calorimetry (DSC), X-ray photoelectron spectrometer (XPS), water contact angle and zeta potential measurements . Upon optimization, the PSF/PES-COOH HFNFM displayed a water flux of 159.6 L m −2 h −1 bar −1 , and a rejection of 99.2 % for Congo red at a dye concentration of 100 mg/L and operating pressure of 0.1 MPa. With the effective dye-salt fractionation which was comparative to literature reports, the membrane showed unprecedentedly high flux, which can be attributed to the double layer finger-like structure and hydrophilic PES-COOH as additives. The membrane also presented excellent stability and antifouling property during the treatment of simulated textile wastewater.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
LANGMUIR
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2024
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IF 3.7
Ruiqi Li,Wenhang Chen,Junqing Li,Chunhong Zhang,Yueling Sun,XiaoYan Tang,Yuan Liu
Membrane separation technology offers a sustainable and efficient solution to wastewater management; however, membrane fouling significantly impedes its application. Photocatalytic membranes, integrating photocatalytic and membrane separation technologies, enhance membrane separation efficacy while effectively mitigating organic and biological contaminations. In this work, Ag2S/PANI@PES composite membranes were prepared via a facile in situ polymerization and successive layer adsorption technique. The modified poly(ether sulfone) (PES) membrane demonstrated improved hydrophilicity and separation performance, and its heterostructure between polyaniline (PANI), Ag0, and Ag2S effectively addressed organic fouling issues. Moreover, Ag2S/PANI@PES exhibited outstanding antimicrobial properties, as well as chemical and mechanical stability.
研究领域:
环境科学
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材料科学
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化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Guowei Shan,Xiao Xiao,Hong Gao,Qi Zhang,Houyi Peng,Weixing Li
Heavy metal ion (HMI)-contaminated wastewater is a great threat to public health. Membrane separation is an efficient and green technology for HMI removal. Here, the strategy of nanoparticle in-situ growth combined with molecule grafting was proposed to fabricate the UiO-66-NH 2 -g-DTPA/PES composite membrane. The UiO-66-NH 2 nanoparticles bound within the PES membrane substrate uniformly brought a significant number of primary amino groups, providing abundant graft sites for DTPA molecule. Numerous carboxyl groups and tertiary amine groups were introduced as the result of DTPA grafting, enabling the formation of M−DTPA complexes with HMIs. The fabricated UiO-66-NH 2 -g-DTPA/PES membranes exhibited excellent performances. The pure water flux arrived at 6208 L·m −2 ·h −1 and the efficiencies of removing Cu 2+ , Pb 2+ , Cr 3+ and Cd 2+ were 99.73%, 99.79%, 96.91% and 98.33%, respectively. Moreover, the UiO-66-NH 2 -g-DTPA/PES membrane also showed a remarkable stability in pH conditions ranging from 3 to 10 and remained a relatively high performance in the cyclic test.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
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2022
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IF 5.876
Guolong Lu,Hao Cui,Xiaohui Weng,Youhong Sun,Zhiyong Chang
Methane detection is important for exploring combustible ice in energy field. As the core component of the methane sensor, gas-liquid separation membranes play a crucial role in separating methane from water, which can effectively enhance the timeliness and stability of methane detection. Moreover, the correlative permeability and mechanical properties of are contradictory requirements for achieving optimum performance of membranes. Herein, a methane-water separation membrane was developed and optimized by adjusting the PEG as porogen based on PDMS and PES as functional and support layers, respectively. PDMS/PES composite membrane performed an excellent methane permeability and tensile strength . Particularly, the PEG was studied as porogen to affect the morphology and adjust pore structure of the PES layer. Considering the trade-off of methane permeability and mechanical properties , the results indicate the appropriate content of porogen is 4 wt% PEG. This work optimizes a new approach to prepare methane-water separation membrane and give a significant insight to develop methane detection for exploring new energy in seabed.
研究领域:
材料科学
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能源工程
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产品关联
DOI
高影响因子
Journal of Water Process Engineering
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2022
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IF 7.34
JongNam Choe,JongMin Ji,MyongBok Kim,JuHyon Yu,JongYol Ri,KyongSu Ri,HyonIl Kim
In this paper, a novel hydrophilic composite polyethersulfone (PES) ultrafiltration membrane was prepared by blending sunlight response photocatalyst NH 2 -MIL-125 via the phase inversion method. The physical-chemistry performance of membrane was carried out by XRD, FTIR, UV-VIS/DRS, contact angle, and cross-section SEM images. The separation ability, anti-fouling ability, and self-cleaning efficiency of ultrafiltration membrane were analyzed by ultrafiltration experiment using the congo red solution. The results indicate that fouling resistance and the flux recovery ratio of ultrafiltration membrane is significantly improved, and it has higher solar response energy. There was no significant change in the rejection ratio of pollutants before and after illumination. For the pristine PES membrane and the 0.5% NH 2 -MIL-125/PES nanocomposite membrane, the water flux recovery ratio (FRR) could increase from 37.84% to 77.09%, and the R r could increase from 22.22% to 44.09%, and the R ir could decrease from 67.11% to 47.09%. In a conclusion, the addition of NH 2 -MIL-125 at a low concentration could result in membranes with more pure water flux, better rejection, and good fouling resistance compared to the unfilled PES membrane.
研究领域:
材料科学
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环境工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMOSPHERE
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2023
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IF 8.8
Jun Young Kim,Kang Hoon Lee,Jae Won Lee,Imtiaz Afzal Khan,Jong-Oh Kim
In this study, the removal efficiency of chemicals of emerging concerns (CECs) was evaluated under exposure to various doses of UV/H 2 O 2 -based oxidation processes in combination with membrane filtration for three cleaning cycles. Polyethersulphone (PES) and polyvinylidene fluoride (PVDF) materials based membranes were used for this study. The chemical cleaning of the membranes was performed by immersion of the membranes into 1 N HCl followed by adding 3000 mg.L −1 NaOCl for 1hr. Degradation and filtration performance was evaluated using Liquid Chromatography with tandem mass spectrometry (LC-MS/MS) and total organic carbon (TOC) analysis. Membrane fouling analysis for assessing the comparative performance of PES and PVDF membranes was determined by specific fouling and fouling indices evaluation. Membrane characterization results show that the alkynes and carbonyl group formation are due to dehydrofluorination and oxidation of PVDF and PES membranes under the attack of foulants and cleaning chemicals, which resulted in a reduction of fluoride percentage and an increase in sulfur percentage in the PVDF and PES membranes. A decrease in the hydrophilicity of the membranes in underexposed conditions was observed and is consistent with an increase in dose. Degradation results of CECs follow with the highest removal efficiency of chlortetracycline (CTC) followed by atenolol (ATL), acetaminophen (ACT), and caffeine (CAF) degradation due to attack on the aromatic ring and the carbonyl group of CECs by OH exposure. Membrane exposed at 3 mg.L-1 dose of UV/H 2 O 2 -based CECs shows minimum alteration with higher filtration efficiency and lower fouling, particularly in PES membranes.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
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2024
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IF 5.9
Jinyang Liu,Chengcai Li,Qiqi Liao,Guojin Liu,Hailin Zhu,Yuhai Guo
Photocatalytic membranes are the most effective solution for dye wastewater treatment and membrane pollution reduction, among them, how to improve the visible light responsiveness of photocatalytic membranes is the focus of research in this direction. In this paper, a novel Δ(Z + II)-type photocatalyst with visible light responsiveness was prepared using YVO 4 -modified dual-precursorgraphitic carbon nitride (U6M1). The Nonsolvent Induce Phase Separation (NIPS) was used to create the YVO 4 /U6M1/PES membrane, which gave the membrane photocatalytic capacity. The efficiency of removing rhodamine B(RhB) reached 99 % within 120 min, and the separation efficiency of Acid Red 18(AR-18) reached 95.1 % within 150 min. In addition, the membrane also has certain self-cleaning capabilities and can maintain a separation efficiency of more than 89 % after 5 cycles. As a green material, the composite membrane loaded with YVO 4 /U6M1 photocatalyst has great potential in the practical application of dye wastewater treatment.
研究领域:
环境科学
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材料科学
✓ 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）