Article
Engineering, Environmental
Hai-Ming Song, Li-Jing Zhu, Gang Wang, Hao Yang, Zhi-Xiang Zeng, Ling-Hui Wang
Summary: PVDF porous membranes prepared by non-solvent induced phase separation exhibit various crystalline forms and micro/nanostructures, showing excellent oil permeation resistance and outstanding antifouling properties.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Engineering, Chemical
Huarong Yu, Siyuan Shangguan, Haiyang Yang, Hongwei Rong, Fangshu Qu
Summary: In this study, the aging behavior of NIPS-PVDF and TIPS-PVDF membranes was investigated. The NIPS-PVDF membrane experienced more severe aging compared to the TIPS-PVDF membrane. The results provide insights for selecting chemical cleaning strategies and improving the anti-aging characteristics of PVDF membranes.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Polymer Science
Joao Teixeira, Vanessa Fernandes Cardoso, Gabriela Botelho, Antonio Miguel Morao, Joao Nunes-Pereira, Senentxu Lanceros-Mendez
Summary: The production of PVDF membranes using NIPS with DMF as solvent and water as non-solvent was studied in this work. The morphology, surface characteristics, structure, thermal and mechanical properties of the membranes were affected by processing conditions, with increasing polymer dissolution temperature leading to larger pores, higher porosity, and water contact angle. Conditioning time did not have a significant impact on the polymer properties studied, demonstrating that NIPS parameters can be controlled to tailor PVDF membrane properties.
Article
Engineering, Chemical
Ningyuan Chen, Jie Zhao, Lei Shi, Atsushi Goto, Rong Wang
Summary: The use of water-insoluble diluents in the thermally induced phase separation (TIPS) process can eliminate the effect of diluent outflow, while the addition of hydrophilic non-solvents can improve the surface porosity and permeability of polyvinylidene fluoride ultrafiltration membranes. The study also found that the simultaneous addition of both types of additives can significantly enhance the membrane's permeability.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Engineering, Chemical
Jun Pan, Lixun Zhang, Zhaohui Wang, Shi-Peng Sun, Zhaoliang Cui, Naser Tavajohi
Summary: Poly (vinylidene fluoride)-co-hexafluoropropylene membranes were prepared using acetyl tributyl citrate as a non-toxic diluent, with effects of polymer concentration on membrane properties investigated. Results showed that pore size and porosity decreased with increasing polymer concentration, while contact angle, liquid entry pressure, and mechanical properties increased. High salt rejection (>99.9%) was achieved in direct contact membrane distillation, with excellent long-term stability in permeate flux and salt rejection observed for the prepared membranes.
FRONTIERS OF CHEMICAL SCIENCE AND ENGINEERING
(2022)
Article
Engineering, Chemical
Shang Xiang, Xiuxiu Tang, Saeid Rajabzadeh, Pengfei Zhang, Zhenyu Cui, Hideto Matsuyama
Summary: In this study, PVDF/EVOH blend hollow fiber membranes were fabricated using thermally induced phase separation technology. The surface enrichment of EVOH during the fabrication process improved the hydrophilicity, tensile strength, and water permeability of the membranes. Compared to the pristine membrane, the EVOH blend membrane showed better antifouling properties.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Engineering, Chemical
Jie Zhao, Jeng Yi Chong, Lei Shi, Rong Wang
Summary: A novel approach was developed to immobilize F127 in PVDF hollow fiber membranes using PTFE particles as a binding agent through the N-TIPS method. The dual functions of F127 in pore formation and surface hydrophilization for PVDF membranes were observed. The membranes showed excellent pure water permeability and tensile strength, demonstrating the potential of the N-TIPS method for tuning membrane pore structure and hydrophilicity using multifunctional additives.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Chemistry, Physical
Li-Jing Zhu, Ming Yang, Gang Wang, Zhi-Xiang Zeng, Zheng-Feng Jia
Summary: Superoleophobic and anti-oil adhesion membranes were prepared using vapor-induced phase separation and sulfonated dopamine deposition. The resulting membranes showed excellent performance in removing emulsified toluene from water.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Polymer Science
Zhaozhe Chu, Ruijun Zhao, Bin Wang, Long Liu, Zhe Ma, Yuesheng Li
Summary: The presence of hexadecyl trimethyl ammonium bromide (CTAB) and tetrabutylammonium hydrogen sulfate (TBAHS) ions during the crystallization of poly(vinylidene fluoride) (PVDF)-ion composites led to different effects, with TBAHS ions accelerating the formation of the polar γ-phase and CTAB ions enhancing the crystallinity of the nonpolar α-phase. Additionally, flow induced the formation of the β-phase, which exhibited piezo/ferroelectric properties, and the presence of ions increased the amount of this β-phase. Moreover, both CTAB and TBAHS ions induced the crystallization of the γ-phase during the isothermal process at a high temperature, suppressing the α-phase in neat PVDF.
Article
Materials Science, Multidisciplinary
Tian-Qi Zhang, Shuang Hao, Jun Xiao, Zhi-Qian Jia
Summary: This article presents a low-temperature thermally induced phase separation (LT-TIPS) method for the preparation of porous poly(4-methyl-1-pentene) (PMP) membranes at 70 degrees C. The effects of quenching medium, quenching temperature, time, wet membrane thickness, and polymer concentration on the membrane porosity and air permeability were studied.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Engineering, Chemical
Miaomiao Tian, Junyong Zhu, Shushan Yuan, Yatao Zhang, Bart Van der Bruggen
Summary: The study demonstrates that by co-casting to reduce the solvent/nonsolvent exchange rate at the same time, PVDF membranes with uniformly rough surface structures can be effectively fabricated, facilitating the membrane distillation process. The PVDF concentration significantly affects membrane morphology, with increasing PVDF content leading to different phase inversion mechanisms.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Polymer Science
Tatsuaki Miyashita, Hiromu Saito
Summary: The evolution of gamma-phase spherulites of PVDF-TBAHS during isothermal crystallization was investigated using polarized optical microscopy and light scattering measurements. The results showed a two-stage evolution process, with the growth of disordered domains in the first stage and the increase in ordering due to the increase in lamellar stacks in the spherulite in the second stage. The birefringence of gamma-phase spherulites in PVDF-TBAHS was much smaller than that of alpha-phase spherulites in neat PVDF.
Article
Polymer Science
Thulasinath Raman Venkatesan, David Smykalla, Bernd Ploss, Michael Wuebbenhorst, Reimund Gerhard
Summary: The effects of thermal processing on the micro- and nanostructural features and relaxor-ferroelectric properties of a P(VDF-TrFE-CFE) terpolymer were investigated. Annealing reduces the Curie transition temperature and shifts the ferroelectric phase fraction, leading to relaxor-ferroelectric behavior. Changes in transition temperatures are related to alterations in hysteresis curves.
Article
Polymer Science
Pradeep K. Prajapati, Puyam S. Singh
Summary: The properties of PVDF ultrafiltration membranes, including porosity, hydrophobicity, and flux, are affected by the size of the polymer structural units in the initial casting solution.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Nanoscience & Nanotechnology
Jiale Fang, Chengqi Chen, Hongxing Qi, Jie Zhang, Xiaoxuan Hou, Likun Pan, Xianghui Wang
Summary: Developing flexible electromagnetic interference (EMI SE) shielding materials is crucial for protecting humans from harmful radiation. We designed and fabricated a flexible multilayer structure of PVDF/GNP-PVDF composite film, which exhibited high EMI SE performance (averaging 69.7 dB in X-band), excellent flexibility, and stability (98.85% retention after bending 1000 cycles at 60 degrees). The theoretical study indicates that the multiple reflection and absorption of electromagnetic waves between layers contribute to the high EMI SE performance of the PVDF/GNP-PVDF multilayer film.
ACS APPLIED NANO MATERIALS
(2023)
Article
Engineering, Chemical
Jiawei Hou, Shixuan Guo, Nigel Graham, Wenzheng Yu, Kening Sun, Ting Liu
Summary: A novel 2D composite membrane based on r-HGO and MXene materials was developed, demonstrating exceptional performance for water treatment in terms of permeability, pollutant rejection, and physical stability. The optimization of preparation conditions and material proportions can result in high water flux and efficient removal of pollutants.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Retraction
Engineering, Chemical
Chang Liu, Jinghong Liu, Liang Zhu, Shanfu Tang, Huixin Xiong
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Rui Gao, Caihong Liu, Andreia F. Faria, Qiang He, Chun Yang, Jun Ma
Summary: A novel copolymer architecture has been developed to address biofouling concerns in thin-film composite (TFC) membranes by integrating anti-fouling, bactericidal, and fouling-release functions. The multifunctional membrane demonstrates promising anti-adhesive properties, self-cleaning ability, and high flux recovery rate.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Alexander T. Bridge, Noah P. Wamble, Matthew S. Santoso, Joan F. Brennecke, Benny D. Freeman
Summary: This study demonstrates the reproducible preparation of high-flux defect-free asymmetric gas separation membranes using Cyrene(TM) as a majority dope formulation component. By adjusting the volume ratios of Cyrene(TM) and THF, as well as the concentrations of Matrimid(R) and the dry step time, optimal membrane performance is achieved.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Alessandra Imbrogno, Han Ya Lin, Babak Minofar, Andrea Iris Schaefer
Summary: In this study, a composite nanofiber membrane containing cross-linked beta-cyclodextrin-epichlorohydrin was prepared and evaluated for the removal of steroid hormones. The results showed that the membrane had high adsorption capacity and the ability to form a specific inclusion complex interaction with the hormones, indicating its potential application in hormone removal.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Bora Shin, Jaewon Shin, Yanuar Chandra Wirasembada, Ki Young Park, Jinwoo Cho
Summary: This study develops a mathematical model to estimate the initial flux of volatile fatty acids in the direct contact membrane distillation process. It identifies the parameters affecting the flux and their relationship with pH.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Yi-Jui Yeh, Jr Rong Liou, Wei Lin, Kuo-Lun Tung, Wei-Hung Chiang
Summary: This study demonstrates an effective plasma engineering method to create nitrogen-doped graphene quantum dot (NGQD)-inorganic nanocomposites for tunable molecular separation. The composite materials show high separation efficiency and controllable nanopore structures, making them potentially valuable for various applications.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Horacio Lopez-Marques, Kristofer L. Gleason, Manuel Aguilar-Vega, Rita Sulub-Sulub, J. Ehren Eichler, Hyeonji Oh, C. Buddie Mullins, Benny D. Freeman, Manish Kumar
Summary: In this study, water transport properties in Carbon Molecular Sieve (CMS) membranes were investigated. It was found that membranes synthesized at different pyrolysis temperatures exhibited varying water permeabilities. Compared to other polymeric materials, CMS membranes showed high water permeability, indicating potential for dehydration applications.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Dmitry A. Alentiev, Roman Yu. Nikiforov, Marina A. Rudakova, Danil P. Zarezin, Maxim A. Topchiy, Andrey F. Asachenko, Nikolay A. Belov, Maxim Bermeshev
Summary: A series of new norbornene-type monomers containing linear and branched substituents were synthesized, and robust thin membranes were prepared by vinyl-addition polymerization. Gas separation performance for the synthesized polymers was evaluated, and the structure of substituent side chains was found to significantly affect gas permeability and CO2 facilitated transport.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Lei Yan, Qi Zhang, Ze Zhang, Gui-Jie Li, Yi Jin, Xin-Lin Zhang, Yan-Yun Sun
Summary: In this study, a continuous, stable and fast ion transport channel was established through in-situ guided cross-linking of zinc alginate hydrogels on a porous membrane, overcoming the negative pore effect and effectively inhibiting the dendrite growth of zinc anodes and interfacial side reactions.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Yuqing Zhang, Ailing Zhang, Huiyang He, Yuting Fan, Yongjiang Li, Song Wang, Sanxi Li
Summary: The Langmuir-Blodgett self-assembly process is used to create an ordered SPEEK membrane, which enhances the proton conductivity by three times compared to conventional solution casting method.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Hasan Ismaeel, David Gibson, Eleonora Ricci, Maria Grazia De Angelis
Summary: In this study, a machine learning-based group contribution method (ML-GC) was developed to predict pure polymer parameters and successfully applied to predict gas solubility and gas solubility isotherms in glassy polymeric membranes. The model showed satisfactory performance on a small dataset, but has the potential to provide more accurate predictions for a wider range of polymers as more data becomes available.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Yi Ji, Yu Sun, Huilin Li, Qiang Fu, Yan Zhang
Summary: Previous studies have shown that vibration- or rotation-based techniques can effectively mitigate fouling during membrane filtration. However, it is difficult to incorporate these techniques with spiral wound modules (SWMs) widely used in water and wastewater treatment. This study developed a prototype membrane system to accommodate angular vibrations with a modified SWM, and experimental results showed that applying angular vibrations can effectively control algal fouling in an SWM with lower energy consumption compared to traditional methods.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Lakshmeesha Upadhayaya, Abaynesh Yihdego Gebreyohannes, Muhammad Wakil Shahzad, Usman T. Syed, Sandra L. Aristizabal, Radoslaw Gorecki, Suzana P. Nunes
Summary: Increasing temperatures worldwide pose a significant health risk, exacerbated by high humidity. Conventional air conditioners contribute heavily to carbon dioxide emissions, with dehumidification being a major factor. Membrane-based dehumidification system offers energy efficiency and non-toxic water vapor removal. This study demonstrates a membrane dehumidification system with polymeric hollow fibers coated with a green polyphenol coating, showing remarkable water vapor transport rate and selectivity. Long-term testing reveals minimal decline in vapor transport and a 4-5 times higher coefficient of performance (COP) compared to conventional dehumidifiers, making it a highly competitive, energy-saving device with reduced emissions and a smaller footprint.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Engineering, Chemical
Zhengzhong Zhou, Xue Zhu, Yi Yuan, Shaoqiang Wang, Xiaoshan Meng, Taoli Huhe, Qian Wang
Summary: In this study, lignin, a biomass material, was chemically modified and utilized in the interfacial polymerization process to improve the performance of nanofiltration membranes. The modified membranes showed enhanced hydrophilicity and anti-fouling properties, and the optimization of membrane pore size increased permeability. The study also demonstrated the potential application of the membranes in biogas slurry valorization.
JOURNAL OF MEMBRANE SCIENCE
(2024)