Article
Nanoscience & Nanotechnology
M. Obaid, Norah Alsadun, Osama Shekhah, Sarah Almahfoodh, Sheng Zhou, Noreddine Ghaffour, Mohamed Eddaoudi
Summary: Despite progress in oil-water separation, challenges like low permeance and fouling problems still exist. Superwettable materials, particularly metal-organic frameworks (MOFs), are potential candidates for oily wastewater treatment. However, MOFs have been rarely explored for separating stabilized oil-in-water emulsions, calling for the development of better MOF materials.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Hui Li, Jianqiang Zhang, Shaopeng Gan, Xilu Liu, Lei Zhu, Fujun Xia, Xiaoming Luo, Qingzhong Xue
Summary: An oil-water separation membrane with bioinspired bubble-mediated antifouling strategy is developed to overcome the limitations of low surface energy and high viscosity of oil foulants. The membrane is superhydrophilic/superaerophobic and can catalyze hydrogen evolution, generating microbubbles that coalesce with the oil fouling and increase their buoyancy and warp their interface tension. The synergy of warped interface tension, increased buoyancy, and kinetic energy enables efficient dynamic antifouling and removal of solid sediment. The membrane maintains high flux in long-term oil-water and oil-sand-water emulsion separation, making it promising for treating industrial oily wastewater.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Engineering, Chemical
A. Kumar, K. Nayak, A. S. Muench, P. Uhlmann, A. Fery, B. P. Tripathi
Summary: Polydopamine and poly(MPC-co-GMA) were combined to create a robust zwitterionic antifouling surface, which exhibited superhydrophilic character and excellent performance in oil-water separation. The modified membrane showed high oil rejection and flux recovery rates, making it a promising solution for long-term water purification and separation applications.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Engineering, Chemical
Chao Yang, Zeru Wang, Mengying Long, Bingnan Qin, Yuhan Wang, Keda Zhi, Yu Zheng, Junhui Zhao, Wenwen Li, Zhen Wang, Miaomiao Zhang, Runnan Zhang, Hong Wu, Zhongyi Jiang
Summary: A PPS membrane with an amphiphilic surface (aPPS) was designed and fabricated by assembling phytic acid (PA) and perfluorohexanoic acid (PFHA) on the PPS membrane to obtain superior antifouling properties. The amphiphilic surface showed nearly zero adhesion force towards oil due to low intermolecular interaction and small contact area. The aPPS membrane exhibited a low flux decline ratio, high flux recovery ratio, high permeance, and desired oil rejection, making it a promising material for oil/water emulsion separation.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Engineering, Chemical
Yang Wang, Jianqiang Wang, Yajie Ding, Shouyong Zhou, Fu Liu
Summary: A novel membrane antifouling method using in situ generated micro-bubbles for oil/water separation was proposed in this study, which combined membrane separation with catalytic reaction to reduce fouling. The in situ generated micro-bubbles significantly inhibited the surface deposition of rejected oils, leading to a remarkable reduction in membrane fouling.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Chemistry, Physical
Baibing Wei, Kai Wang, Jiarong Wang, Tian C. Zhang, Xiaobao Tian, Shaojun Yuan, Yingqi Li, Haiqing Chang, Ying Liang, Zhihong Zhou
Summary: A thermo-modulated nanofibrous skin covered Janus membrane with good antifouling ability and oil-water separation performance was successfully developed using a scalable synergetic electrospraying/electrospinning method. The membrane exhibited high flux and efficiency in separating oil/water mixtures, and demonstrated improved wettability and water permeability with temperature variation. It also showed excellent antifouling and cleaning ability due to its thermoresponsive property.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Engineering, Chemical
Yu-Hui Jiang, Yu-Qing Zhang, Ce Gao, Qing-Da An, Zuo-Yi Xiao, Shang-Ru Zhai
Summary: A novel type of superhydrophobic biopolymer aerogel membrane was prepared using freeze-casting technique and subsequent chemical vapor deposition. The membrane exhibited excellent oil/water separation and oil sorption performance, providing new insights for designing task-specific functional materials.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
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
Environmental Sciences
Jiahui Zhao, Lin Cao, Xiao Wang, Haoling Huo, Huaijun Lin, Qiwei Wang, Xusheng Yang, Florian Vogel, Wei Li, Zhidan Lin, Peng Zhang
Summary: Metal organic frameworks (MOFs) have great potential in improving the performance of water treatment membranes. In this study, novel nanoparticles based on both nanoporous MOFs and organic PDA layer were used as dopants for PES ultrafiltration membranes. The resulting membranes showed enhanced permeability and anti-fouling properties, and demonstrated promising applications in oily sewage remediation.
ENVIRONMENTAL RESEARCH
(2023)
Article
Engineering, Chemical
Kanupriya Nayak, Anubhav Kumar, Pritam Das, Bijay P. Tripathi
Summary: The polydopamine mediated amphiphilic molecular grafting approach combines hydrophilic and hydrophobic segments to create surfaces with enhanced antifouling properties. The modified surface effectively prevents protein adsorption and shows superior antifouling performance.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Review
Chemistry, Multidisciplinary
Hamouda M. Mousa, Hanan S. Fahmy, Gomaa A. M. Ali, Hani Nasser Abdelhamid, Mohamed Ateia
Summary: This review critically examines the use of membrane technology for oil/water separation. It discusses membrane properties, various materials including organic, inorganic, and hybrid membranes, membrane design, fabrication techniques, and surface modification techniques. The review also highlights the current challenges and future research directions in this field.
ADVANCED MATERIALS INTERFACES
(2022)
Article
Engineering, Environmental
Jialong Chai, Guilong Wang, Aimin Zhang, Xinyang Li, Zhaorui Xu, Jinchuan Zhao, Guoqun Zhao
Summary: In the face of severe pollution in modern industry, membrane separation is widely used for cost-effective treatment of wasted solvents. However, the poor processability of microporous polytetrafluoroethylene (PTFE) membranes poses challenges for waste separation. This study proposes an innovative in-situ fibrillation methodology to prepare PTFE nanofibrous membranes with high porosity, fine pore size, and thin thickness. These membranes exhibit outstanding mechanical properties, chemical resistance, and anti-fouling behavior, making them suitable for fast separation or filtration in harsh solvents. The study achieves high separation efficiency and permeate fluxes driven by gravity and pressure, opening new avenues for the fabrication of robust and anticorrosive PTFE nanofibrous membranes with high separation efficiency.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Jian Xu, Jiuyun Cui, Haotian Sun, Yuting Wu, Changguo Xue, Atian Xie, Chengcai Li
Summary: In this paper, a hydrophilic PVDF@TP membrane was prepared by directly modifying PVDF membrane using green tea extract (tea polyphenols, TP). The resulting membrane exhibited excellent separation efficiency and flux for oil-water emulsion, with good antifouling ability and stability even after 10 times continuous separation. Due to its facile preparation, economy and high-performance, the hydrophilic PVDF@TP membrane has a broad application potential in industrial oily wastewater and oil spill treatment.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Chemistry, Physical
Xueyan Wang, Zhong Liu, Xianfeng Liu, Ying Su, Jin Wang, Tingting Fan, Xin Ning, Seeram Ramakrishn
Summary: In this study, PVDF/SiO2@GO aerogels with high-performance absorbency and flame retardancy were prepared, providing a new choice for efficient and continuous oil-water separation and crude oil absorption.
Article
Engineering, Chemical
Xuehui You, Ming Wang, Guofei Jiang, Xiaodong Zhao, Zicheng Wang, Fang Liu, Chaocheng Zhao, Zehui Qiu, Ruiyu Zhao
Summary: In this study, a metal-free chlorine-sulphur double-doped graphitic carbon nitride (Cl/S-g-C3N4) photocatalyst was incorporated into a polyacrylonitrile (PAN) nanofibrous membrane via electrospinning. The resulting membrane with a porous structure exhibited superior superhydrophilicity and superoleophobicity, enabling efficient separation (>98.0%) of various oil-in-water emulsions. After visible light irradiation, the membrane showed excellent self-cleaning properties, achieving up to 95% removal of contaminants in crude oil/water mixtures and actual oily wastewater. The porous structure increased the contact between contaminants/bacteria and reactive species, enhancing photodegradation and antibacterial properties, and providing high resistance to contamination.
JOURNAL OF MEMBRANE SCIENCE
(2023)