SEPARATION AND PURIFICATION TECHNOLOGY
·
2019
·
IF 5.107
Luhong Zhang,Hongfang Guan,Na Zhang,Bin Jiang,Yongli Sun,Na Yang
In this study, a high flux loose nanofiltration (NF) membrane was fabricated for the desalination of dye wastewater through a facile method which combined doping and surface grafting. First, PES ultrafiltration substrate was prepared via non-solvent induced phase separation by introducing multi-hydroxyl β-cyclodextrin (β-CD) into the casting solution as hydrophilic additive. Then, titanium dioxide (TiO 2 ) nanoparticles were grafted uniformly on membrane surface with the assistance of 1, 6-hexamethylene diisocyanate (HMDI), resulting in the enhancement of surface hydrophilicity and separation performance of the resultant membranes. Remarkably, the membrane prepared at optimized conditions achieved a high pure water flux (52.0 L·m −2 ·h −1 at 0.2 MPa) and high permeate flux for dyes (e.g. 30.5 L·m −2 ·h −1 for Congo Red at 0.2 MPa). It also exhibited high rejection for dyes (e.g. 97.4% for Congo Red) and high transmittance of salts (e.g. 94.0% for Na 2 SO 4 ). Moreover, the membrane possessed good antifouling performance with a high flux recovery ratio of 93.7% after fouled by humic acid (HA). The results indicated that the novel loose NF membrane had an impressive potential application for dye wastewater treatment.
研究领域:
膜科学
·
环境工程
·
水处理
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2022
·
IF 10.53
Jian Ren,Xin Yang,Weixing Yan,Xia Feng,Yiping Zhao,Li Chen
The efficiency of the hemodialysis membrane has been widely improved by blending small molecular additives and modifying the membrane surface for patients with chronic or acute kidney disease. However, a qualified sieving property, flux, and hemocompatibility are intractable to give consideration simultaneously, while the elution of small-molecular additives and modifiers easily cause coagulation, complement activation, etc. Fortunately, the BCP methoxy polyethylene glycol-polyethersulfone-block-methoxy polyethylene glycol (mPEG -b- PES -b- mPEG) based membranes exhibiting great potential for sieving in middle molecular toxin and compatibility between mPEG -b- PES -b- mPEG and PES, is nearly unfeasible elution during hemodialysis, by reason of including bounded hydrophilic segments by chemical bonds. Here, the mPEG -b- PES -b- mPEG is synthesized to fabricate the membranes, including blend membranes and BCP membrane. As a result, the blend membranes have shown an increasing flux, hemocompatibility, and sieving of lysozyme with the increasing cooperation of mPEG-b-PES-b-mPEG, the block copolymer (BCP) mPEG -b- PES -b- mPEG membrane has shown better balance than the blend membranes in flux, sieving, and hemocompatibility. Besides, for exploring further possibilities, the typical blend membrane M4 (mPEG- b -PES- b -mPEG: 20%, PES: 5%) and BCP membrane M5 (mPEG- b -PES- b -mPEG: 25%) are post tailored by ethanol at 50 °C for 2 h. This process leading the typical membranes to an efficient flux (M5-P: 442.22 L m −2 h −1 ) and sieving performances (M5-P: the urea and lysozyme sieving of 96.43% and 74.97%) due to the effect of ethanol at the micro-molecular chain movements and microspheres transfer. Our work presents BCP mPEG -b- PES -b- mPEG a promising future in hemodialysis membranes according to the superior performances of flux and sieving.
研究领域:
材料科学
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生物医学工程
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES COMMUNICATIONS
·
2025
·
IF 7.7
Jinghua Wang,Zhishen Yin,Jie Sun,Yeqing Liu,Ruoxi Fan,Jialiang Li,Duo Chen,Jia Yan,Shichao Li,Zhanjun Wu
The mechanical properties of resin matrixes are predominant factors influencing the overall performance of fiber-reinforced composites. In this study, the high brittleness and low toughness of epoxy resin (EP) are addressed by incorporating hydroxyl-terminated polyether-sulfone (PES-OH) and nano-silica (Nano-SiO 2 ) into the EP. The incorporation of PES-OH into EP led to a 22.6 % increase in tensile strength and a 27.8 % improvement in elongation at break at ultra-low temperatures. These enhancements are attributed to the formation of a semi-interpenetrating polymer network (SIPN) during the curing process, which strengthens the molecular network of the epoxy resin matrix through physical entanglement, interfacial reinforcement, and stress dispersion, enhancing crack resistance. The simultaneous introduction of PES-OH and Nano-SiO 2 synergistically improves the mechanical properties of EP at ultra-low temperatures (90 K). Specifically, the tensile strength, elongation at break, and modulus of elasticity of the modified EP were increased by 30.63 %, 19.6 %, 20.9 % and a 65.61 % improvement in fracture toughness (K IC ), respectively, compared to the pure EP. The synergistic effect arises from the covalent bonding between the hydroxyl groups on Nano-SiO 2 and those in PES-OH and EP, thereby toughening and strengthening the epoxy molecular structure. Additionally, microdroplet debonding tests of carbon fiber with EP showed a 25.22 % increase in interfacial shear strength after introducing PES-OH and Nano-SiO 2 . Dynamic thermo-mechanical analysis confirmed that the incorporation of PES-OH and Nano-SiO 2 does not compromise the thermal stability of EP.
研究领域:
材料科学
·
复合材料
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2020
·
IF 7.183
Caini Liu,Wenyi Wang,Liuyong Zhu,Fangyan Cui,Chengcheng Xie,Xingyu Chen,Ning Li
A structurally controlled polyethersulfone (PES) membrane, as the substrate of the thin film composite nanofiltration (NF) membranes, was designed and fabricated with aligned carbon nanotubes (ACNTs) by a direct current electric field. The morphology and properties of the NF membranes were simultaneously affected by the PES substrate with especial macrovoids and ACNTs, increasing the permeability from 6.4 to 29.7 L/m 2 h bar. It was confirmed by FT-IR and XPS that the poly(piperazine amide) selective layer of the modified NF membrane has an increased content of –COOH for enhanced hydrophilicity. The zeta potential proves that the surface of the NF membrane modified by electric field has weaker negative charge than that of unmodified membrane in the range of pH = 5–9. Under the combined action of the Donnan effect and size exclusion, the rejection of MgCl 2 increased while maintaining the dianion rejection above 95%. Particularly, the NF membrane modified with ACNTs exhibited better chlorine resistance and antifouling ability, thus improving the stability and perdurability of membranes. Our work utilizes the characteristics of ACNTs to explore its potential in NF membranes.
研究领域:
材料科学
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化学工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2025
·Vol. 36
·期 1
·e70031
·
IF 3.4
Xiaotian Wang,Yeerken Aheyeli-kai,Huakun Ying,Jiangli Lin,Yulu Luo,Hongying Ma,Zhongyang Li,Zhen Su
Triphenylmethane dyes have a wide range of applications in textiles, pharmaceuticals, food, and other fields. Malachite green (MG), fuchsin acid (FA), and crystalline violet (CV) were typical representatives of triphenylmethane dyes, and they are carcinogenic and mutagenic to aquatic organisms and environment. However, they need to be separated and enriched for their accurate quantification due to their low content. Therefore, it is important to develop a rapid and accurate enrichment method to monitor these dyes in aquatic systems for human health. In this paper, a novel QuEChERS adsorbent porous ZIF67/PAA/PES composite microspheres were prepared and applied for the rapid adsorption of triphenylmethane dyes in wastewater and fish samples, which improved the adsorption capacity and the analytical sensitivity of the targets. The experimental results demonstrated that the porous ZIF-67/PAA/PES composite microspheres exhibited excellent selective adsorption capacity of MG, FA, and CV, and after six adsorption–desorption cycles, the material adsorption amount can reach more than 90% of its original adsorption amount in wastewater. In addition, the porous ZIF67/PAA/PES composite microspheres were applied as QuEChERS adsorbents for the enrichment of MG and CV dyes in fish, and the adsorption rates of the dyes were 99.11% and 99.03%, with the RSDs of 1.58% and 1.27%, respectively. The limits of detection were 0.0093 and 0.0127 mg/L for MG and CV. Through the Langmuir adsorption isotherm models to predict the MG, FA, and CV of the maximum adsorption capacity were 5417.3622, 2119.9011, and 1654.1026 mg/g, respectively. Thus, the novel porous ZIF67/PAA/PES composite microspheres are more advantageous as QuEChERS adsorbents for sample pre-treatment and have very important research significance.
研究领域:
环境科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Zhengda Lin,Yijun Liu,Zhongming Zhang,Jie Yao
In this study we used a high-temperature steam-induced hydrolysis method to obtain a fluorinated OH/SiO 2 -TiO 2 /polyethersulfone (PES) composite hollow fiber membrane for CO 2 capture. The purpose of grafting SiO 2 and TiO 2 on the surface of PES by hydrolyzing silicon precursors and titanium precursors at high temperature, is to improve the alkali corrosion resistance and hydrophobicity of the PES membrane. The OH/SiO 2 -TiO 2 /PES composite hollow fiber membranes prepared by the high-temperature steam-induced hydrolysis method and the graft coating method were measured by SEM, EDS , FTIR, WCA, AFM , XRD and XPS in order to characterize the morphology and structure of the prepared membranes. In the CO 2 /CH 4 separation performance test experiment, the OH/SiO 2 -TiO 2 /PES membrane prepared by the high-temperature steam hydrolysis method showed better separation performance than the original PES membrane. The effects of absorbent flow rate, absorbent concentration and feed gas flow rate on CO 2 flux and CO 2 /CH 4 were selectivity investigated. When the flow rate of the absorbent (DEA) reached 16 L/h, the flow rate of the feed gas (CO 2 /CH 4 = 40 : 60) was 30 ml/min, the concentration of the absorbent was 1 mol/L, The CH 4 concentration was 99.88 % and the optimal separation factor was as high as 554.89. In general, the results obtained in this work may provide promising insights into the use of fluorinated OH/SiO 2 -TiO 2 /PES composite membranes for carbon capture and CO 2 /CH 4 separation in GLMC application.
研究领域:
材料科学
·
环境工程
✓ 已验证
DOI
高影响因子
IONICS
·
2021
·Vol. 27
·期 12
·4927-4936
·
IF 2.817
Liu Jiuqing,Song Feifei,Li Qihou,Li Jie,Hong Zikun,Wang Cheng,Liu Meng,Bai Lishun,Zeng Fanli
The polymer separator is part of the gel polymer electrolyte (GPE) and plays a crucial role in battery. In this study, a novel PES-based separator for lithium-oxygen batteries was prepared using non-solvent-induced phase separation (NIPS) technique firstly and modified by doping Al 2 O 3 nanoparticles. It is proved that the properties of the PES/Al 2 O 3 separator are affected by the presence of Al 2 O 3 nanoparticles. The results show that the PES/Al 2 O 3 separator with Al 2 O 3 content of 2 wt% and 4 wt% has lower crystallinity, higher electrolyte uptake, and better mechanical properties and thermal stability than PES-based separator without Al 2 O 3 . The resulting PES/Al 2 O 3 separator containing 4 wt% Al 2 O 3 has higher ionic conductivity (0.49 mS cm −1 ) and lithium ions transference number (0.28). Consequently, the assembled batteries with the PES/Al 2 O 3 separator containing 4 wt% Al 2 O 3 exhibit excellent cycling performance (75 cycles, 1000 mAh g −1 at 0.05 mA cm −2 ). Therefore, PES/Al 2 O 3 separator has a significance meaning in the research of high-safety and long-cycle lithium-oxygen battery.
研究领域:
材料科学
·
电化学
·
电池技术
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Xi Wu,Xiaohua Jie,Xinghua Liang,Qicheng Hu,Liuyan Zhang,Jin Wang,Shufang Wu
Solid state lithium-ion batteries (SSLIBs) with high safety and high energy density are promising novel energy storage devices. However, the performance of SSLIBs would descend under a wide work temperature range. A flexible ceramic-polymer composite solid electrolyte membrane was created by solution casting to obtain good stability of SSLIBs at different temperatures. The PVDF-HFP-PES-LiClO 4 -Li 6.4 La 3 Zr 1.4 Ta 0.6 O 12 (LLZTO) composite solid electrolyte shows excellent electrochemical performances in the temperature range of 20 to 60 o C. The ionic conductivity of PVDF-HFP-PES-LiClO 4 -LLZTO (PPLL) is 4.26 × 10 -4 , 4.97 × 10 -4 , 5.26 × 10 -4 , 5.59 × 10 -4 and 5.97 × 10 -4 S cm -1 at 20, 30, 40, 50 and 60 o C, respectively. The PPLL was employed in LiFePO 4 (LFP)/PPLL/Li batteries, and their properties were tested at 0.2 C. The test results show that the LFP/PPLL/Li battery has a good charge-discharge, rate, and cyclic performance at 20 - 60 o C. After 150 cycles with 0.2C at 30 o C and 60 o C, the capacity retention rates of 75.6% and 86.4%, respectively. This work provides an effective strategy for designing and preparing SSLIBs.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Hongyu Yin,Zhoujun Wang,Xiang Zhang,Weifeng Zhao,Ran Wei,Changsheng Zhao
Chronic liver failure (CLF) and chronic renal failure (CRF) lead to toxins accumulation, severely impairing organ functions. To address this challenge, a Janus polyethersulfone (PES)-based architecture integrated dense membrane with porous monolith is developed, pioneering an approach for simultaneous plasma separation and toxins adsorption. The porous monolith, featuring high porosity about 83.3 % and substantial specific surface area about 102.06 m 2 /g, is prepared using the freezing-induced phase separation (FIPS) technique. The porous monolith is composed of polymer networks of PES and amphiphilic copolymer of poly (vinyl pyrrolidone-co-methyl methacrylate) (VM), as well as activated carbon. Among the various monolith, the PES 18 VM 5 C 2 exhibits the optimal balance of adsorption and anti-protein adhesion. The PES-VM-incorporated dense membrane with a controlled submicron pore size is constructed atop the PES 18 VM 5 C 2 . The dense membrane effectively blocks hemocytes and the porous monolith efficiently adsorbs toxins. Together, the Janus architecture PES 18 VM 5 C 2 @M 16 allows over 85 % of bovine serum albumin (BSA) to permeate, showcasing its selective permeability. After being integrated into a custom 3D-printed supporting device, the PES 18 VM 5 C 2 @M 16 achieves significant clearance in creatinine (67.6 %), uric acid (87.4 %), and bilirubin (89.1 %) during 2-hour plasma adsorption test, with minimal impact on essential plasma components such as total protein, albumin, and cholesterol. This work presents a “Janus Interface Architecture” as next-generation platform for plasma separation and toxins adsorption, offering a promising strategy for wearable artificial liver systems.
研究领域:
生物医学工程
·
材料科学
·
血液透析
·
血浆分离技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2022
·
IF 7.968
Jinchao Chen,Chunmei Gao,Shuangquan Zhao,Shenghui Liu,Shifeng Ji,Yunqing Xing,Tianyang Wu,Jinjian Wu,Hongyu Chen,Peng Zou,Jiaonan Cai
In this work, the NH 2 -MIL-125/F127/PES membranes with superior ultrafiltration , anti-fouling and self-cleaning were constructed via the RTIPS method. Characterizations showed the successful fabrication of NH 2 -MIL-125 with good photocatalysis activities, together with its stable anchoring in PES membrane. The loss of NH 2 -MIL-125 was suppressed by hydrogen bond between F127 and NH 2 -MIL-125, where hydrophilic F127 significantly boosted permeability and anti-fouling property. The permeability-selectivity trade-off effect was alleviated by NH 2 -MIL-125 with a regular size window. It was observed that the membranes prepared by the RTIPS method occurred a spongy-like cross-section and a porous surface, which imparted the membrane with improved ultrafiltration and mechanical properties over the finger-like cross-section and dense skin caused by the NIPS method. The optimal membranes exhibited decent permeability (1511 L/m 2 h), BSA rejection rate (85.3%) and high COD removal rate over the commercial membranes, whose flux recovery rate was up to 76.91% after two cycles under light irradiation by the synergistic effect of F127 and NH 2 -MIL-125. The membrane fouled with RhB exhibited excellent regeneration properties benefiting from the holes (h + ) and superoxide free radicals ( • O 2 − ), as well as reactive •OH. Overall, the membrane with F127 and NH 2 -MIL-125 presented a highly promising in improving ultrafiltration and self-cleaning via the RTIPS method.
研究领域:
材料科学
·
环境工程
·
化学工程
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Qiaoyu Liang,Shenghuan Wang,Yanhong Ji,Mohammad Younas,Benqiao He
Loose nanofiltration membranes (LNF) have wide applications in the field of precise separation of small organic molecules. However, high separation precision of organic molecules with salts and a high water flux are still the challenges in the commercial applications of LNF membranes. In the current work, polyethersulfone (PES)/hydroxylated polyethersulfone (PES-OH) LNF membranes were synthesized by nonsolvent-induced phase separation (NIPS) based on reactive porogen (butyl dicarbonate, BDC) for the first time. The reactive porogen was decomposed to produce nanobubbles during heat-treated casting solution and phase inversion in HCl coagulation. It was found that the heat-treatment temperature of the casting solution was higher, the viscosity of the solution at 20 °C was higher due to the existence of more nanobubbles from BDC decomposition in the casting solution. Moreover, heat-treatment temperature had decisive impacts on the structure and separation property of the formed LNF membranes as nanobubbles actually acted as pore-forming agents. The HCl coagulation/immersion baths also promoted the BDC decomposition to produce the nanobubbles and improved the transmembrane water flux without sacrificing rejection and separation precision performance. The synthesized LNF membrane had a pore diameter approximately 3.81 nm, with a flux up to 200.2 L·m −2 ·h −1 . Direct Black 38 shows a rejection of > 99 %, whereas NaCl shows a rejection of < 5 %, exhibiting a good separation accuracy and found superior to the separation performance in the literature. This research result has offered a novel approach for the preparation of superior performance LNF membranes, which can be utilized for precise separation.
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
SEPARATION AND PURIFICATION TECHNOLOGY
·
2020
·
IF 5.774
Qingping Xin,Chao Zhang,Yu Zhang,Qingqing Liang,Lei Zhang,Shaofei Wang,Hui Ye,Xiaoli Ding,Yuzhong Zhang
Obtaining high SO 2 absorption flux for membrane contactor is noticeably vital for fule gas desulfurization, and superhydrophobic surface is essential to reach excellent desulfurization performance. The development of a generic and low budget strategy for membrane contactors preparation is important in indisturial application. In this study, a superhydrophobic polyethersulfone-silica (PES/PES-SiO 2 ) gas-liquid membrane contactor is fabricated using a facile spin coating method. PES substrate is prepared by a facile non-solvent induced phase separation (NIPS), and then the superhydrophobic surface of PES/PES-SiO 2 is formed on the PES substrate by spin coating method. The solubility parameters of mixed solvent, PES concentration, and SiO 2 content are regulated to investigate the morphology of membrane contactors. On one hand, the surface structure of MMMCs is regulated, and constructs lotus-leaf like morphology, which noticeably elevate surface roughness. On the other hand, SiO 2 nanoparticles enhance hydrophobic characteristic with water contact angle 159° and anti wetting resistance with liquid entry pressure of water (LEP w ) 1.389 bar. Moreover, the SiO 2 nanoparticles help to significantly improve the stability of desulfurization performance, which is much higher than PES control membrane after 12 h test. The SO 2 absorption fluxes and SO 2 removal efficiencies are 1.24 × 10 −3 mol·m −2 ·s −1 and 63.8%, respectively. Besides, the membrane phase transfer coefficient ( K m ) and membrane phase transfer resistance ( H / K m ) are explored.
研究领域:
化学工程
·
环境科学
✓ 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）