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学者姓名：彭跃莲
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Abstract ：
Triethyl phosphate (TEP) is a promising solvent for the c-TIPS process given its high boiling point and water miscibility. However, casting solutions containing high TEP concentration generally trigger gelation, giving a dense outer surface in PVDF membrane. In this work, we fabricated PVDF hollow fiber membranes with a porous outer surface and excellent mechanical strength via a complex thermally induced phase separation (c-TIPS) method and applied them in the DCMD process. A water-insoluble solvent, dibasic ester solvents (DBEs), was used as the second solvent to modulate the phase separation process of the PVDF/TEP system. The mass transfer between the coagulation bath and the DBEs solvent was analyzed. It could decrease the polymer-solvent interactions and the rate of solvent efflux in the coagulation bath, contributing to the development of a porous membrane structure. When the weight ratio of TEP/DMA was 1, the optimized PVDF hollow fiber membrane exhibited a tensile strength of 8.34 MPa, an average pore diameter of 0.14 mu m, giving the permeate flux of 18.56 +/- 2.5 kg m(-2) h(-1) in DCMD and excellent operational stability when subjected to high brine concentration. Thus, the fabrication method shows a promising potential for tailoring the surface porosity and bulk structure. The PVDF membranes developed in this study demonstrate potential for use in membrane distillation and related applications.
Keyword ：
Casting solution Casting solution High brine High brine Dibasic ester solvents Dibasic ester solvents Water-insoluble Water-insoluble DCMD DCMD
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| GB/T 7714 | Hou, Chunguang , Yue, Dianhe , Wong, Ngie Hing et al. Preparation of high-performance PVDF hollow fiber microporous membranes via the c-TIPS process with water-insoluble solvent as the second solvent [J]. | JOURNAL OF MEMBRANE SCIENCE , 2024 , 713 . |
| MLA | Hou, Chunguang et al. "Preparation of high-performance PVDF hollow fiber microporous membranes via the c-TIPS process with water-insoluble solvent as the second solvent" . | JOURNAL OF MEMBRANE SCIENCE 713 (2024) . |
| APA | Hou, Chunguang , Yue, Dianhe , Wong, Ngie Hing , Sunarso, Jaka , Xie, Songchen , Yu, Ziyu et al. Preparation of high-performance PVDF hollow fiber microporous membranes via the c-TIPS process with water-insoluble solvent as the second solvent . | JOURNAL OF MEMBRANE SCIENCE , 2024 , 713 . |
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Abstract ：
Membrane distillation (MD) demonstrates excellent desalination application potential for high salt concentration wastewater. However, keeping the membrane flux and rejection high during long-term operation remains one of the critical challenges. In this work, a heat-stretching treatment method was proposed to improve the structure of polyvinylidene fluoride (PVDF) hollow fiber membrane and enhance its stability in the MD process. The mem-brane's pore size decreased after a heat-stretching treatment in water at 120 C for 1 h. However, the liquid entry pressure of water (LEPw) value and membrane strength increased significantly, making it less prone to pore deformation during the drying or MD process and thus improving the membrane flux and stability in the MD process. The heat-stretching treatment made the PVDF chain arrangement more compact and oriented, avoiding shrinkage in the length direction. Besides stretching, the shrinkage of hollow fiber can be constricted by the combined effects of pore filling and stretching due to water or glycerol filling in the membrane pores, thus eliminating the capillary stress caused by liquid evaporation during the air-drying. Consequently, the heat -stretching treatment broke the trade-off between high permeate flux and high stability in the MD process.
Keyword ：
Shrinkage Shrinkage Heat-stretching treatment Heat-stretching treatment PVDF hollow fiber membrane PVDF hollow fiber membrane Membrane distillation Membrane distillation Trade-off Trade-off
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| GB/T 7714 | Hou, Chunguang , Pang, Zhiguang , Xie, Songchen et al. Enhanced permeability and stability of PVDF hollow fiber membrane in DCMD via heat-stretching treatment [J]. | SEPARATION AND PURIFICATION TECHNOLOGY , 2023 , 304 . |
| MLA | Hou, Chunguang et al. "Enhanced permeability and stability of PVDF hollow fiber membrane in DCMD via heat-stretching treatment" . | SEPARATION AND PURIFICATION TECHNOLOGY 304 (2023) . |
| APA | Hou, Chunguang , Pang, Zhiguang , Xie, Songchen , Wong, Ngie Hing , Sunarso, Jaka , Peng, Yuelian . Enhanced permeability and stability of PVDF hollow fiber membrane in DCMD via heat-stretching treatment . | SEPARATION AND PURIFICATION TECHNOLOGY , 2023 , 304 . |
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Abstract ：
蛋白污染严重制约着聚醚砜(PES)膜的实际应用，提高膜表面的亲水性是降低蛋白吸附现象的有效方法.在等离子体处理PES膜的表面进行了一步沉积接枝聚-多巴胺甲基丙烯酰胺-2-甲基丙烯酰氧乙基磷酸胆碱(DMA-MPC),然后考察了改性膜的亲水性与抗污染性.研究结果表明，经过等离子处理，使PES膜表面增加了含胺基的反应位点，其与DMA-MPC反应后形成稳定的共价键，在最优改性条件下PES改性膜的水接触角可降至37.7°±1°,在保持牛血清蛋白(BSA)高截留率的同时，通量提高至1 060±30 L/(m~2·h·MPa),通量保持率从47%±1%提高至73%±1%.改性膜在循环测试中展现出优异的稳定性，为减少PES膜表面蛋白吸附提供了新的方法.
Keyword ：
抗蛋白吸附 抗蛋白吸附 两性离子共聚物 两性离子共聚物 亲水改性 亲水改性 多巴胺衍生物 多巴胺衍生物 聚醚砜 聚醚砜
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| GB/T 7714 | 杨紫云 , 陈聪 , 刘巧鸿 et al. DMA-MPC共聚物亲水改性PES膜及抗蛋白吸附性能研究 [J]. | 膜科学与技术 , 2023 , 43 (04) : 1-9,36 . |
| MLA | 杨紫云 et al. "DMA-MPC共聚物亲水改性PES膜及抗蛋白吸附性能研究" . | 膜科学与技术 43 . 04 (2023) : 1-9,36 . |
| APA | 杨紫云 , 陈聪 , 刘巧鸿 , 李雅倩 , 彭跃莲 , 安全福 . DMA-MPC共聚物亲水改性PES膜及抗蛋白吸附性能研究 . | 膜科学与技术 , 2023 , 43 (04) , 1-9,36 . |
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Abstract ：
膜蒸馏过程受料液盐度的影响较小，可以处理高矿化度的矿井水，但膜污染和润湿制约其工业化应用。本文首次全面比较了两种商业化的疏水膜，即平板聚四氟乙烯（PTFE）和聚偏氟乙烯（PVDF），以及分别进行亲水和疏水表面改性后制备的PVA-PAA/PTFE和Teflon/PVDF两种复合膜，在直接接触式膜蒸馏（DCMD）中浓缩饱和硫酸钙溶液时的结垢和润湿程度。重点分析了两种基膜和复合膜的结垢和润湿机理，探讨它们在矿井水浓缩中的应用潜力和最佳膜结构。实验结果显示，饱和硫酸钙浓缩过程中，膜表面结垢是主要影响因素，PTFE膜和PVDF膜尽管膜微观结构差别巨大，但抗结垢能力接近；Teflon/PVDF复合膜因其表面有滑移特性而表现出完美的抗结垢性能，PVA-PAA/PTFE复合膜尽管有致密的亲水表面，抗结垢能力并不强。
Keyword ：
膜蒸馏 膜蒸馏 润湿 润湿 矿井水 矿井水 疏水改性 疏水改性 亲水改性 亲水改性 结垢 结垢
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| GB/T 7714 | 李雪佳 , 李鹏 , 李志霞 et al. 亲水和疏水改性膜的抗结垢和润湿能力的对比 [J]. | 化工进展 , 2023 , 42 (08) : 4458-4464 . |
| MLA | 李雪佳 et al. "亲水和疏水改性膜的抗结垢和润湿能力的对比" . | 化工进展 42 . 08 (2023) : 4458-4464 . |
| APA | 李雪佳 , 李鹏 , 李志霞 , 晋墩尚 , 郭强 , 宋旭锋 et al. 亲水和疏水改性膜的抗结垢和润湿能力的对比 . | 化工进展 , 2023 , 42 (08) , 4458-4464 . |
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Abstract ：
Mineral scaling is one of the major challenges for membrane distillation in concentrating high-salinity brine. This work first investigated the characteristic of CaSO4 scaling, then explored different cleaning reagents to evaluate their efficiencies and mechanisms. By analyzing the SEM and EDX mapping images, the CaSO4 scaling process could be divided into surface and pore scaling stages. Three cleaning solutions, i.e., commercial detergent (20 %), EDTA-4Na (0.05 M), and MgCl2 (0.8 M), were chosen for their high CaSO4 solubility (0.7 g CaSO4 per 100 g H2O). At the surface scaling stage, three cleaning solutions exhibited excellent removal of CaSO4 scaling with approximately similar 96 % cleaning efficiencies. However, at the pore scaling stage, only the commercial detergent showed high efficiency (89 %). Such high cleaning efficiency was mainly attributed to the detergent's high total dissolved solids (salinity), low pH, and high diffusion rate (5.46 mu m cm(-1) min(-1)) across the membrane. Moreover, periodic cleaning at the surface scaling stage with the commercial detergent followed by drying throughout a 43.5 h continuous concentration test on an actual RO brine could restore the PTFE membrane performance completely, giving 90 % of the total water recovery. This work provides new insights into the cleaning mechanism for gypsum scaling in a hydrophobic porous membrane.
Keyword ：
Hydrophobic porous membrane Hydrophobic porous membrane Cleaning reagents Cleaning reagents Diffusion rate Diffusion rate Cleaning depth Cleaning depth Membrane distillation Membrane distillation CaSO4 scaling CaSO4 scaling
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| GB/T 7714 | Xie, Songchen , Wong, Ngie Hing , Sunarso, Jaka et al. Cleaning mechanism of gypsum scaling in hydrophobic porous membranes [J]. | DESALINATION , 2023 , 547 . |
| MLA | Xie, Songchen et al. "Cleaning mechanism of gypsum scaling in hydrophobic porous membranes" . | DESALINATION 547 (2023) . |
| APA | Xie, Songchen , Wong, Ngie Hing , Sunarso, Jaka , Guo, Qiang , Hou, Chunguang , Pang, Zhiguang et al. Cleaning mechanism of gypsum scaling in hydrophobic porous membranes . | DESALINATION , 2023 , 547 . |
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Abstract ：
膜蒸馏(MD)技术由于受浓差极化影响小，有望在浓盐水的深度浓缩中发挥作用，但在实际运行过程中会面临膜污染和润湿的问题.本研究采用旋涂法在商用疏水性聚四氟乙烯(PTFE)膜上涂覆一层亲水性皮层，制备了一种Janus复合膜.该皮层由聚乙烯醇(PVA)和聚丙烯酸(PAA)通过高温脱水缩合而成，在热水中性质稳定，具有较强的耐污染能力.Janus复合膜具有不对称的润湿性，PTFE膜表面呈疏水性，空气中水接触角为144.3°;涂层在空气中亲水，水接触角为59.1°,水下憎油.采用Janus复合膜，以含500 mg/L腐殖酸(HA)、14.7 mmol/L硫酸钙(CaSO_4)以及各自添加氯化钠(NaCl)...
Keyword ：
Janus复合膜 Janus复合膜 直接接触式膜蒸馏(DCMD) 直接接触式膜蒸馏(DCMD) 垃圾渗滤液 垃圾渗滤液 耐污染 耐污染
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| GB/T 7714 | 李志霞 , 谢松辰 , 晋墩尚 et al. PVA-PAA/PTFE复合膜的制备及其在膜蒸馏中浓缩垃圾渗滤液的性能 [J]. | 膜科学与技术 , 2022 , 42 (04) : 96-104 . |
| MLA | 李志霞 et al. "PVA-PAA/PTFE复合膜的制备及其在膜蒸馏中浓缩垃圾渗滤液的性能" . | 膜科学与技术 42 . 04 (2022) : 96-104 . |
| APA | 李志霞 , 谢松辰 , 晋墩尚 , 宋旭锋 , 彭跃莲 . PVA-PAA/PTFE复合膜的制备及其在膜蒸馏中浓缩垃圾渗滤液的性能 . | 膜科学与技术 , 2022 , 42 (04) , 96-104 . |
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Abstract ：
提高膜表面的疏水化及液体进入压力(LEP)是减缓膜蒸馏过程中膜污染问题的有效策略.以聚偏氟乙烯(PVDF)中空纤维膜为基膜,采用浸渍涂覆-固化法将乳液组装到PVDF膜表面,制备了具有抗污染性能的复合膜.探究了涂覆时间对膜的形貌及性能的影响,并考察了复合膜的抗污染和抗结垢性能.结果表明,当涂覆时间为20 min时,复合膜的水接触角达到115°,LEP达到0.75 MPa.在DCMD浓缩实验中,复合膜在分别处理质量分数3.5％NaCl、质量浓度50 mg/L的HA和14.7 mmo/L CaSO4水溶液时,膜通量稳定,冷凝液电导率保持在10μS/cm以内,表现出优异的抗污染和抗结垢性能.此外,考察了中空纤维复合膜的稳定性.结果表明,复合膜在浓缩质量分数3.5％NaCl水溶液时,膜通量为16 kg/(m2·h),冷凝液电导率保持在15 μS/cm以内,表现出良好的长期稳定性能.
Keyword ：
PVDF中空纤维膜 PVDF中空纤维膜 膜蒸馏 膜蒸馏 浸渍涂覆-固化 浸渍涂覆-固化 抗结垢 抗结垢 抗污染 抗污染
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| GB/T 7714 | 晋墩尚 , 谢松辰 , 李志霞 et al. 膜蒸馏用抗污染PVDF复合膜的制备与研究 [J]. | 膜科学与技术 , 2022 , 42 (5) : 129-138 . |
| MLA | 晋墩尚 et al. "膜蒸馏用抗污染PVDF复合膜的制备与研究" . | 膜科学与技术 42 . 5 (2022) : 129-138 . |
| APA | 晋墩尚 , 谢松辰 , 李志霞 , 宋旭峰 , 彭跃莲 . 膜蒸馏用抗污染PVDF复合膜的制备与研究 . | 膜科学与技术 , 2022 , 42 (5) , 129-138 . |
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Abstract ：
Landfill leachates (LFLs) pose a severe environmental threat given their high strength and the slow degradation nature of their organic and inorganic pollutants constituents. Hence, they are challenging to treat by conventional wastewater treatment methods. Although membrane distillation (MD) is promising for wastewater treatment, membrane wetting and scaling that lead to membrane fouling are the bottlenecks in applying this technology to LFLs. In this work, a commercial Teflon emulsion was used to modify the PVDF membrane via a simple dip-coating method, followed by depositing the PTFE particles onto the membrane surface via thermal curing crosslinking reaction. Hence, a Teflon/PVDF composite membrane was successfully prepared with resistance to sodium dodecyl sulfate wetting, CaSO4 scaling, and humic acid fouling. Effects of the Teflon emulsion concentration and dipping time on the composite membrane's chemical composition, surface characteristics, porosity, mechanical properties, liquid entry pressure (LEPW), and direct contact membrane distillation (DCMD) performance were systematically investigated. The results showed that Teflon emulsion modification could improve the membrane surface's hydrophobicity, reduce pore size, and increase mechanical strength. The Teflon/PVDF composite membrane with 100% Teflon emulsion and 10 min dipping time exhibited the highest hydrophobicity and 144.3o water contact angle. The M100-10 membrane also exhibited stable performance for treating nanofiltration (NF) brine collected from the LFL. When concentrating the NF brine, the M100-10 membrane achieved only a 7.1% flux decay rate. Hence, the Teflon/PVDF composite membrane demonstrated excellent wetting, scaling, and fouling resistance. This dip-coating method is simple, low cost, easy to scale up, and has potential in the large-scale production of hydrophobic porous membranes.
Keyword ：
Anti -fouling Anti -fouling Teflon emulsion Teflon emulsion PVDF membrane PVDF membrane Landfill leachate Landfill leachate Dip -coating Dip -coating Membrane distillation Membrane distillation
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| GB/T 7714 | Hou, Chunguang , Guo, Qiang , Wong, Ngie Hing et al. Preparation of a fouling-resistant Teflon/PVDF composite membrane and its application to treat nanofiltration brine from landfill leachates [J]. | PROCESS SAFETY AND ENVIRONMENTAL PROTECTION , 2022 , 168 : 535-543 . |
| MLA | Hou, Chunguang et al. "Preparation of a fouling-resistant Teflon/PVDF composite membrane and its application to treat nanofiltration brine from landfill leachates" . | PROCESS SAFETY AND ENVIRONMENTAL PROTECTION 168 (2022) : 535-543 . |
| APA | Hou, Chunguang , Guo, Qiang , Wong, Ngie Hing , Sunarso, Jaka , Li, Zhixia , Song, Xufeng et al. Preparation of a fouling-resistant Teflon/PVDF composite membrane and its application to treat nanofiltration brine from landfill leachates . | PROCESS SAFETY AND ENVIRONMENTAL PROTECTION , 2022 , 168 , 535-543 . |
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Abstract ：
Mineral scaling is one of the significant obstacles in hypersaline wastewater treatment using membrane distillation (MD) technology. A deeper understanding of the scaling mechanism can help to solve mineral scaling problems. This work investigated three porous membranes with different surface pore sizes and hydrophobic properties, i.e., PTFE-0.22, PTFE-0.10, and PVDF-0.22, used in the direct-contact membrane distillation (DCMD) process. We selected gypsum as a model contaminant in the scaling experiment and focused on its homogeneous and heterogeneous nucleation effects on membrane scaling. The morphology analysis of the scaled membrane revealed that homogeneous nucleation might be the main reason for scaling. In addition, gypsum crystallization in the membrane pores was the main reason for the significant flux decline and low physical cleaning efficiency (PTFE-0.22). When the surface pore size of the membrane (PTFE-0.10 and PVDF-0.22) was reduced, gypsum crystalization in the pores could be alleviated. Such phenomenon was mainly initiated by homogeneous nucleation. Nonetheless, the surface scaling was still severe for PVDF-0.22 because its hydrophobicity was too low to inhibit the heterogeneous nucleation on the membrane. However, PTFE-0.10 with a small surface pore size and high hydrophobicity could simultaneously alleviate the effect of two nucleations. We could easily remove the gypsum crystals deposited on the membrane surface by physical cleaning and achieve more than 90% flux recovery efficiency. Therefore, reducing the surface pore size and increasing the surface hydrophobicity should be two main strategies in preparing the anti-scaling hydrophobic membrane used in MD.
Keyword ：
Gypsum crystallization Gypsum crystallization Mineral scaling Mineral scaling Scaling mechanism Scaling mechanism Hydrophobic membrane Hydrophobic membrane Membrane distillation Membrane distillation
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| GB/T 7714 | Xie, Songchen , Li, Zhixia , Wong, Ngie Hing et al. Gypsum scaling mechanisms on hydrophobic membranes and its mitigation strategies in membrane distillation [J]. | JOURNAL OF MEMBRANE SCIENCE , 2022 , 648 . |
| MLA | Xie, Songchen et al. "Gypsum scaling mechanisms on hydrophobic membranes and its mitigation strategies in membrane distillation" . | JOURNAL OF MEMBRANE SCIENCE 648 (2022) . |
| APA | Xie, Songchen , Li, Zhixia , Wong, Ngie Hing , Sunarso, Jaka , Jin, Dunshang , Yin, Lixin et al. Gypsum scaling mechanisms on hydrophobic membranes and its mitigation strategies in membrane distillation . | JOURNAL OF MEMBRANE SCIENCE , 2022 , 648 . |
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Abstract ：
讨论了构筑耐污染特性超滤膜的策略及其局限性.重点概括了国内外在水合层效应和空间位阻效应(污染物抵制机制)、低表面能效应(污染物释放机制)、氧化分解效应(污染物攻击机制)、膜表面图案技术5种抗污策略指导下的膜研究进展.并对构筑耐污染超滤膜面临的主要挑战和发展方向进行了展望.
Keyword ：
超滤膜 超滤膜 抗污策略 抗污策略 研究进展 研究进展 膜污染 膜污染
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| GB/T 7714 | 侯春光 , 文剑平 , 庞志广 et al. 耐污染超滤膜的研究进展 [J]. | 膜科学与技术 , 2021 , 41 (2) : 157-168 . |
| MLA | 侯春光 et al. "耐污染超滤膜的研究进展" . | 膜科学与技术 41 . 2 (2021) : 157-168 . |
| APA | 侯春光 , 文剑平 , 庞志广 , 谢松辰 , 晋墩尚 , 李志霞 et al. 耐污染超滤膜的研究进展 . | 膜科学与技术 , 2021 , 41 (2) , 157-168 . |
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