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
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
Engineering, Chemical
Yewen Xiao, Feng Xiao, Wei Ji, Li Xia, Linlin Li, Minmin Chen, Hualin Wang
Summary: Janus membranes with unique asymmetric wettability have been developed for oil-water separation. The membrane exhibits superhydrophilicity and superhydrophobicity on opposite sides, which contribute to excellent separation efficiency. The separation mechanism is based on the asymmetric wettability. The membrane shows potential for the separation of oil/water mixtures and surfactant-stabilized emulsions.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Engineering, Chemical
Shaobo Zhang, Yi Li, Yan Yuan, Li Jiang, Haitao Wu, Yanmao Dong
Summary: Membrane separation is an effective method for treating oily wastewater. This study improved the efficiency of oil-in-water emulsion separation by using alkali treatment to promote the deposition of Fe (III) on PVDF membranes. A hydrophilic coating was also produced on the membrane surface, enhancing permeability and antifouling properties. The modified membrane showed excellent pure water flux and oil rejection, as well as underwater anti-oil adhesion and antifouling properties. This environmentally friendly PVDF membrane modification strategy has great potential for oil-in-water emulsion separation.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Electrical & Electronic
Ponnan Sathiyanathan, Lixin Wu, Thomas Walter Schmidt, Tianyuan Li, Gunasekaran Harini Bhuvaneswari, Hongdoo Kim, Arun Anand Prabu, Kap Jin Kim
Summary: This study investigated the changes in beta-crystalline phase in nanofibers using varying content of sulfonated Poly(phenylidene sulfide) as a filler. Among the different samples, the 5 wt.-% sulfonated Poly(phenylidene sulfide) content exhibited the maximum increase in beta-crystallinity, showing a nucleating effect in the nanofibers.
SENSORS AND ACTUATORS A-PHYSICAL
(2021)
Article
Materials Science, Multidisciplinary
Rosalin Rath, Piyush Kumar, Lakshmi Unnikrishnan, Smita Mohanty, Sanjay K. Nayak
Summary: This study successfully fabricated nanocomposite membranes with high ion exchange capacity and proton conductivity, suitable for fuel cell applications. The membranes demonstrated excellent conductivity at high temperatures, suppressed methanol crossover, and higher membrane selectivity compared to Nafion, suggesting their potential as an alternative in fuel cell applications.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
Zhuizhui Fan, Mingwei Hu, Keru Hou, Kaili Jin, Hong Zhao, Zaisheng Cai
Summary: In this study, a hydrophobic PVDF membrane was fabricated using an ethanol/water/glycerol ternary coagulation bath system, leading to significant changes in the micromorphology and performance of the membrane. Introducing glycerol into the coagulation bath finely regulated the precipitation process, inhibiting solid-liquid separation and promoting liquid-liquid separation. The resulting membrane exhibited improved mechanical properties, a more uniform pore size, and a symmetrical interconnected fibrous and spherulitic structure.
Review
Environmental Sciences
R. Suresh, Saravanan Rajendran, Lalitha Gnanasekaran, Pau Loke Show, Wei-Hsin Chen, Matias Soto-Moscoso
Summary: This review investigates the application of PVDF-based nanomembranes in the removal of synthetic dyes. Various methods, including surface coating and blending, were discussed for fabricating high performance PVDF-based nanomembranes. The incorporation of nanomaterials such as metal compounds, metals, (synthetic/bio)polymers, metal organic frameworks, carbon materials and their composites in PVDF membranes to enhance their performance was also explored. The impact of nanomaterials on the surface features, mechanical strength, hydrophilicity, crystallinity, and catalytic ability of PVDF membranes was discussed, along with future research directions.
Article
Polymer Science
Amjad Albiladi, Lassaad Gzara, Hussam Organji, Nazeeha S. Alkayal, Alberto Figoli
Summary: The major challenge in membrane distillation (MD) is membrane wetting caused by pollutants. This study focused on fabricating hydrophobic membranes for brine treatment using electrospun PVDF-HFP nanofiber membranes. The effects of solvent composition and polymer concentration on the electrospinning process were investigated, and post-treatment was carried out to optimize membrane performance.
Article
Engineering, Chemical
Antoine Venault, Yi-Tung Chin, Irish Maggay, Chih-Chen Yeh, Yung Chang
Summary: This work investigates the association of P(S-r-AA) copolymer with PVDF in the fabrication of electrospun fibers for blood filtration, showing improved wetting of nanofibers and enhanced separation and retention of white blood cells. The results demonstrate the potential of PVDF-based nanofibers as efficient separation media for whole blood, with further efforts needed to enhance biocompatibility and red blood cell recovery.
JOURNAL OF MEMBRANE SCIENCE
(2022)
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, 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
Chemistry, Multidisciplinary
O. Prakash, S. Bihari, Keshav, S. Tiwari, R. Prakash, P. Maiti
Summary: The study successfully synthesized an anionic membrane based on PVDF, with good chemical grafting properties and structural transformation characteristics, suitable for electrolyte in alkaline fuel cells, and also exhibiting piezoelectricity, indicating the potential for a smart membrane in various technologies.
MATERIALS TODAY CHEMISTRY
(2022)
Article
Materials Science, Composites
Afsaneh Ramezani, Javad Seyfi, Mir Karim Razavi Aghjeh, Hossein Eivaz Mohammadloo, Seyed Rasoul Mousavi, Hossein Ali Khonakdar
Summary: In this study, robust nanocomposite coatings based on PVDF and MoS2 nanoplatelets were prepared by spray coating method. It was found that the drying temperature affected the surface structure and porosity of the coatings, and the addition of MoS2 nanoplatelets improved the corrosion resistance of the coatings.
POLYMER COMPOSITES
(2022)
Article
Engineering, Chemical
Chao Wei, Cheng-Lin Wang, Ying-Jie Hao, Xuan Zhang, Ji-Sheng Long, Wan-Zhong Lang
Summary: Construction of separation membranes with underwater super-oleophobic property is a promising approach for oily wastewater treatment, but current methods face challenges such as time-consuming preparation and unstable membranes. In this study, alkali-induced hydroxylation and nature-inspired coordination coating were used to modify poly (vinylidene fluoride) (PVDF) membranes. The modified membranes exhibited excellent hydrophilicity and specific hierarchical roughness, resulting in hydrophilic/underwater super-oleophobic properties. The optimized membrane showed improved flux and oil rejection in treating two simulated oil-in-water emulsions, along with enhanced antifouling behavior and membrane stability.
JOURNAL OF MEMBRANE SCIENCE
(2023)