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学者姓名：彭跃莲
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摘要 ：
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.
关键词 ：
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 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
Membrane wetting is one of the key challenges that needs to be overcome to realize operational stability in membrane distillation. In this work, we showed that negative pressure mode can be applied into direct contact membrane distillation (DCMD) using PVDF hollow fiber membrane to achieve such stability for low surface tension (42.2 mN m-1) organic solvent (represented by ethanol)-containing saline solution feed but is less useful for surfactant (represented by Tween-20)-containing saline solution feed with similar surface tension. While the conventional positive pressure DCMD showed rapid deterioration of flux and increase of permeate conductivity during 6-hour continuous operation when treating a 25 vol% ethanol in 0.6 M NaCl solution, negative pressure DCMD could maintain stable high flux of 10.4 kg m- 2 h-1 and low permeate conductivity of 3 mu S cm-1 throughout 6-hour duration. Using time-dependent droplet evaporation experiments and membrane morphology observations, we demonstrated the different membrane wetting and fouling mechanisms of ethanol and Tween20-containing solutions. We also demonstrated that negative pressure can effectively prevent the membrane wetting in ethanol solution feed case by keeping the contact angle of the liquid on the pore wall larger than 90o, which promotes the formation of a Cassie-Baxter state on the liquid-vapor interface.
关键词 ：
Evaporation Evaporation Surfactant Surfactant Organic solvent Organic solvent Cassie-Baxter state Cassie-Baxter state PVDF PVDF Fouling Fouling
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| GB/T 7714 | Xie, Songchen , Hou, Chunguang , Pang, Zhiguang et al. Anti-wetting mechanism of negative pressure mode in direct contact membrane distillation using hollow fiber membrane [J]. | DESALINATION , 2023 , 569 . |
| MLA | Xie, Songchen et al. "Anti-wetting mechanism of negative pressure mode in direct contact membrane distillation using hollow fiber membrane" . | DESALINATION 569 (2023) . |
| APA | Xie, Songchen , Hou, Chunguang , Pang, Zhiguang , Yu, Ziyu , Sunarso, Jaka , Wong, Ngie Hing et al. Anti-wetting mechanism of negative pressure mode in direct contact membrane distillation using hollow fiber membrane . | DESALINATION , 2023 , 569 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
Polyvinylpyrrolidone (PVP) is a widely used water-soluble polymer that can act as a pore -forming additive in ultrafiltration membrane preparation. Here, the PVDF hollow fiber membranes were prepared via the c -TIPS method by introducing PVP to the casting solution. The dual PVP roles in the membrane fabrication process enabled the production of PVDF hollow fiber membranes composed of bicontinuous structures. The PVP inhibited PVDF crystallization and then reduced the gelation temperature of the casting solution. They grew faster at coarsening, allowing greater growth of pores, and the formation of gap -connected pores and interlinked pores, which formed the bicontinuous structure. The PVP also acted as an effective pore -forming agent, giving porous outer surface. PVP can be removed almost completely from the membrane and did not lead to the wetting of PVDF membranes. Therefore, the synthesized PVDF membrane under optimal conditions could be used in the DCMD process with a maximum vapor flux of 18 +/- 3 kg m- 2 h-1, the pure water flux in ultrafiltration process reached 335.91 L m- 2 h-1 bar -1, and the tensile stress was 5.8 MPa. This work presents a new route for preparing PVDF hollow fiber membranes using conventional spinning equipment with simple operation and moderately elevated temperature that is scalable to industry level.
关键词 ：
microfiltration microfiltration water permeance water permeance ultrafiltration ultrafiltration upper bound upper bound NIPS NIPS membrane distillation membrane distillation
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| GB/T 7714 | Hou, Chunguang , Pang, Zhiguang , Xie, Songchen et al. Dual PVP roles for preparing PVDF hollow fiber membranes with bicontinuous structures via the complex thermally induced phase separation (c-TIPS) [J]. | SEPARATION AND PURIFICATION TECHNOLOGY , 2023 , 332 . |
| MLA | Hou, Chunguang et al. "Dual PVP roles for preparing PVDF hollow fiber membranes with bicontinuous structures via the complex thermally induced phase separation (c-TIPS)" . | SEPARATION AND PURIFICATION TECHNOLOGY 332 (2023) . |
| APA | Hou, Chunguang , Pang, Zhiguang , Xie, Songchen , Yang, Ziyun , Wong, Ngie Hing , Sunarso, Jaka et al. Dual PVP roles for preparing PVDF hollow fiber membranes with bicontinuous structures via the complex thermally induced phase separation (c-TIPS) . | SEPARATION AND PURIFICATION TECHNOLOGY , 2023 , 332 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
Membrane distillation (MD) is an attractive desalination technology for treating high salt concentration water/wastewater. Nonetheless, developing membrane modules with high flux and fouling resistance but low energy consumption for industrial application remains a critical challenge. In this work, a novel vacuum membrane distillation (VMD) module with a central perforated tube was developed. The variation of vapor pressure on the shell side was monitored to analyze the relationship between the mass transfer driving force and the permeate flux. The energy consumption of each piece of equipment in the VMD device was evaluated. The heater, chiller, and vacuum pump consumed about 1/3 of the total energy for the VMD system. The central perforated tube suction decreased the mean vapor pressure better than the shell suction. Double suction enabled more uniform pressure distribution on the shell side. The permeate flux under double suction was 50-70 % higher than that under single suction. Consequently, the optimal length, packing fraction, and suction mode were proposed based on energy saving. Our results that include the first report on the generation of superheated vapor in VMD can guide engineers in designing the relevant modules and system scale-up and process optimization for industrial applications.
关键词 ：
Novel module Novel module Vapor pressure Vapor pressure Hollow fiber Hollow fiber Specific energy consumption Specific energy consumption Vacuum membrane distillation Vacuum membrane distillation Suction mode Suction mode
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| GB/T 7714 | Pang, Zhiguang , Hou, Chunguang , Xie, Songchen et al. Optimization of hollow fiber membrane module for vacuum membrane distillation (VMD) via experimental study [J]. | DESALINATION , 2022 , 542 . |
| MLA | Pang, Zhiguang et al. "Optimization of hollow fiber membrane module for vacuum membrane distillation (VMD) via experimental study" . | DESALINATION 542 (2022) . |
| APA | Pang, Zhiguang , Hou, Chunguang , Xie, Songchen , Wong, Ngie Hing , Sunarso, Jaka , Peng, Yuelian . Optimization of hollow fiber membrane module for vacuum membrane distillation (VMD) via experimental study . | DESALINATION , 2022 , 542 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
Membrane scaling represents one of the significant challenges for membrane distillation (MD), especially when treating hypersaline brines. This work presents a one-step dip-coating method to develop an omniphobic membrane. The commercial polyvinylidene fluoride (PVDF) hydrophobic porous membranes were immersed into the epoxy acrylic (EA) resin and fluorosilane (1H,1H,2H,2H-Perfluorodecyltrimethoxysilane, PFTS) mixture followed by a heating cross-linking process. EA/PFTS ratio of 1:1 (v/v) gave the best performance regarding surface morphology, surface chemical composition, surface energy, and mechanical property. The resultant PVDF-(EA/PFTS)-1:1 membrane demonstrated excellent wetting resistance and omniphobicity during the penetration of deionized water, 30% and 60% ethanol in water, and kerosene, giving 141 degrees, 124 degrees, 106 degrees, and 116 degrees contact angles, respectively. It also exhibited excellent scaling resistance in concentrating 14.7 mM gypsum solution and actual reverse osmosis (RO) brine. The permeate flux and conductivity were maintained at about 14 kg m(-2) h(-1) and below 3 mu S cm(-1), respectively. More than 99% salt rejection (actual RO brine) was achieved during a long-term continuous MD operation for 80 h. The PVDF-(EA/PFTS)-1:1 membrane exhibited excellent anti-scaling and anti-wetting properties. A series of capillary experiments confirmed that the membrane's surface pores achieved the gas-wetting state. The increase in the membrane surface hydrophobicity, the reduction in the surface pore size, and the toughening of the surface pores contributed to the formation of a stable gas-liquid interface on the modified membrane surface that can enhance the anti-scaling and anti-wetting performance.
关键词 ：
Membrane distillation Membrane distillation Anti -wetting Anti -wetting Anti -scaling Anti -scaling Gas wetting Gas wetting Omniphobic membrane Omniphobic membrane
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| GB/T 7714 | Xie, Songchen , Pang, Zhiguang , Hou, Chunguang et al. One-step preparation of omniphobic membrane with concurrent anti-scaling and anti-wetting properties for membrane distillation [J]. | JOURNAL OF MEMBRANE SCIENCE , 2022 , 660 . |
| MLA | Xie, Songchen et al. "One-step preparation of omniphobic membrane with concurrent anti-scaling and anti-wetting properties for membrane distillation" . | JOURNAL OF MEMBRANE SCIENCE 660 (2022) . |
| APA | Xie, Songchen , Pang, Zhiguang , Hou, Chunguang , Wong, Ngie Hing , Sunarso, Jaka , Peng, Yuelian . One-step preparation of omniphobic membrane with concurrent anti-scaling and anti-wetting properties for membrane distillation . | JOURNAL OF MEMBRANE SCIENCE , 2022 , 660 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
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.
关键词 ：
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 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
耐污染超滤膜的研究进展
关键词 ：
超滤膜 超滤膜 膜污染 膜污染 抗污策略 抗污策略 研究进展 研究进展
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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]. | 侯春光 , 2021 , 41 (2) : 157-168 . |
| MLA | 侯春光 et al. "耐污染超滤膜的研究进展" . | 侯春光 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 . | 侯春光 , 2021 , 41 (2) , 157-168 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
膜蒸馏作为一种脱盐的新兴技术受到广泛关注.然而,因为实际水质组分复杂,可能含有如表面活性剂、油类物质、易结垢盐和有机溶剂等污染物,导致一般疏水膜在长时间运行情况下极易发生膜污染或者膜润湿,最终造成膜通量或截留性能降低.本文首先简述了不同种类的膜污染和膜润湿的特点及形成原因,并分析了膜污染和膜润湿之间的区别和联系.对膜蒸馏过程中膜污染和膜润湿的监测和预测手段进行了简要介绍,最后针对膜蒸馏脱盐过程,重点介绍了近几年国内外预防膜污染和膜润湿的研究进展.研究者一般从污染物与疏水膜的相互作用力着手对疏水膜进行表面改性制备全疏膜和Janus复合膜,避免污染物在膜面的吸附以及抑制表面或孔道润湿.越来越多的研究人员采用致密亲水膜的渗透汽化脱盐来从根本上避免疏水膜带来的润湿.除此之外,对进料液进行预处理也能显著延迟膜的污染和润湿,如混凝/沉淀、膜过滤、煮沸、pH调控等,还可通过改变进料方式、辅助外加磁场等措施控制膜表面局部区域的流体力学状态,减少污染物的附着.适当的膜后处理措施也能恢复膜性能.最后,文章指出了解决膜蒸馏中膜污染和膜润湿的研究方向.
关键词 ：
脱盐 脱盐 膜蒸馏 膜蒸馏 膜污染 膜污染 膜润湿 膜润湿
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| GB/T 7714 | 谢松辰 , 文剑平 , 庞志广 et al. 膜蒸馏脱盐中膜污染与膜润湿的研究进展 [J]. | 化工进展 , 2021 , 40 (7) : 3942-3956 . |
| MLA | 谢松辰 et al. "膜蒸馏脱盐中膜污染与膜润湿的研究进展" . | 化工进展 40 . 7 (2021) : 3942-3956 . |
| APA | 谢松辰 , 文剑平 , 庞志广 , 侯春光 , 李志霞 , 晋墩尚 et al. 膜蒸馏脱盐中膜污染与膜润湿的研究进展 . | 化工进展 , 2021 , 40 (7) , 3942-3956 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
一种制作中空纤维膜组件均匀分布膜丝的方法及装置，属于中空纤维膜组件制备技术领域。包括将膜丝均匀分布于胶带上，通过卷取胶带的方法制作膜丝均匀分布的膜组件；该实现装置包括包括带有刻度条的操作台、可固定胶带的滚轮和杆、刻度条、压杆、压杆以及卷杆和动力源，动力源与卷杆之间通过驱动轴、皮带相连接。滚轮可用于放置胶带且固定在杆上，两滚轮在杆上距离可调控。此方法制作的中空纤维膜组件中膜丝分布均匀，膜通量分布均匀，提高膜组件效率。
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| GB/T 7714 | 彭跃莲 , 侯春光 , 庞志广 . 一种制作中空纤维膜组件均匀分布膜丝的方法及装置 : CN202010325474.9[P]. | 2020-04-22 . |
| MLA | 彭跃莲 et al. "一种制作中空纤维膜组件均匀分布膜丝的方法及装置" : CN202010325474.9. | 2020-04-22 . |
| APA | 彭跃莲 , 侯春光 , 庞志广 . 一种制作中空纤维膜组件均匀分布膜丝的方法及装置 : CN202010325474.9. | 2020-04-22 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
本发明公开了一种中空纤维膜及其制备方法和应用，属于膜分离领域。该制备方法采用具有三孔喷丝头的纺丝装置，包括：提供铸膜液、内芯液和外料液；使外料液、铸膜液、内芯液分别从三孔喷丝头的外孔、中间孔、内孔中同时挤出，形成初生态膜；使初生态膜在凝胶浴中固化，形成中空纤维膜。其中，外料液和内芯液均为成膜材料的弱极性非溶剂，且具有水溶性。基于外料液和内芯液，不仅可以减缓溶剂与非溶剂之间的交换速率，有效避免形成致密皮层，利于提高膜的表面孔隙率，且两者形成的液膜最终溶解入凝胶浴中，不会在中空纤维膜及纺丝装置中残留，所制备的中空纤维膜不存在双致密皮层，其内、外表面的表面孔隙率均得以提高，利于提高膜通量。
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| GB/T 7714 | 彭跃莲 , 谢松辰 , 李悦 . 一种中空纤维膜及其制备方法和应用 : CN201910387809.7[P]. | 2019-05-10 . |
| MLA | 彭跃莲 et al. "一种中空纤维膜及其制备方法和应用" : CN201910387809.7. | 2019-05-10 . |
| APA | 彭跃莲 , 谢松辰 , 李悦 . 一种中空纤维膜及其制备方法和应用 : CN201910387809.7. | 2019-05-10 . |
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