Article
Engineering, Chemical
Yu-Jie Wang, Yiqun Liu, Xin Wei, Li -Ming Ding, Ying-Nan Feng, Zhi-Ping Zhao
Summary: In this study, environmentally-friendly castor oil and soybean oil were used to produce polypropylene hollow fiber microporous membranes via thermally induced phase separation. The addition of castor oil led to changes in membrane pore structure and phase separation behavior. The effects of spinning process parameters on the properties of the membranes and desalination performance were also investigated. The findings of this study provide important guidance for mass production of polypropylene hollow fiber microporous membranes.
Article
Engineering, Chemical
Murong Yang, Haihui Liu, Kaikai Chen, Mianning Wang, Huanhuan Chen, Wei Zhao, Changfa Xiao
Summary: Membrane separation technology is widely used in various fields, especially in water treatment. A study focuses on the preparation of PVDF hollow fiber composite membranes through a green preparation method. The addition of PEO promotes phase separation and improves membrane performance. The prepared membrane shows high water flux, excellent protein rejection, and strong mechanical properties.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2023)
Article
Environmental Sciences
Kaikai Chen, Wei Zhao, Changfa Xiao, Hui Zhu, Qiming Wang
Summary: This study investigated the fouling mechanism of different polyvinylidene fluoride hollow fiber membranes in membrane bioreactor systems. The results showed that the homogeneous-reinforced polyvinylidene fluoride (HMR-PVDF) membrane exhibited better fouling resistance compared to the heterogeneous-reinforced polyvinylidene fluoride (HTR-PVDF) membrane.
Article
Engineering, Environmental
Charmaine Jia Mei Lye, Huijuan Xu, Rong Wang
Summary: The study demonstrates that reinforced PVDF hollow fiber membranes have excellent mechanical strength and resistance to chlorine, maintaining good membrane performance even after prolonged exposure to NaOCl.
JOURNAL OF WATER PROCESS ENGINEERING
(2021)
Article
Engineering, Chemical
Chunguang Hou, Zhiguang Pang, Songchen Xie, Ngie Hing Wong, Jaka Sunarso, Yuelian Peng
Summary: Heat-stretching treatment was demonstrated to improve the structure and stability of PVDF hollow fiber membrane in MD process. The PVDF chain arrangement became more compact and oriented, preventing shrinkage in the length direction. Additionally, the combined effects of pore filling and stretching could further restrict the shrinkage of hollow fiber, eliminating capillary stress caused by liquid evaporation during air-drying.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Engineering, Environmental
Chuanfeng Wang, Yingbo Chen, Xiaoyu Hu, Pengfei Guo
Summary: A dual-layer PVDF loose nanofiltration hollow fiber membrane with desirable properties was designed via phase inversion process, demonstrating low MWCO and excellent separation performance.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Article
Materials Science, Characterization & Testing
Jingjing Yan, Changfa Xiao, Dawei Ji
Summary: The PVDF hollow fiber membrane reinforced with homogeneous fibers prepared through dry-wet spinning process showed improved mechanical properties and separation performance. The fibers were evenly distributed in the separation layer and parallel to the membrane axis. The reinforcement mechanism and the potential to adjust membrane properties with different fiber structures were investigated.
Article
Engineering, Chemical
Tao Zhang, Xin Guo, Brusly Solomon, Mohsen Sharifpur, Li-Zhi Zhang
Summary: In this study, a hydrophobic-hydrophilic composite hollow fiber membrane with remarkable antiwetting and antifouling properties was successfully prepared to address the issues of membrane fouling and wetting in seawater desalination. The membrane, prepared using a chemical grafting method, exhibited low moisture transfer resistance and a superhydrophobic surface, resulting in a sustained high permeate flux.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Engineering, Chemical
Jingjing Yan, Changfa Xiao, Chun Wang
Summary: A new type of enhanced hollow fiber membrane was fabricated by simultaneous deposition of PVDF nanofibers and PVDF/silica (SiO2) micro/nanospheres on the outer surface of a rotating PVDF braided tube using electrospinning and electrospraying. The membrane exhibited superoleophilicity, underoil superhydrophobicity, high permeability, excellent oil-water separation performance, and outstanding tensile strength.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Engineering, Chemical
Pengfei Zhang, Saeid Rajabzadeh, Qiangqiang Song, Ralph Rolly Gonzales, Yuandong Jia, Shang Xiang, Zhan Li, Hideto Matsuyama
Summary: This study proposes a new method for fabricating loose nanofiltration (LNF) membranes by combining co-extrusion technology and chemical cross-linking. The prepared membranes exhibit small pore size, strong positive charge, high rejection of various dyes, and low salt rejection. They also show excellent stability during long-term filtration and good fouling reduction properties against bovine serum albumin (BSA) and lysozyme (LYZ). This research provides new perspectives for the design of useful LNF HFMs for the treatment of dye/salt wastewater mixtures.
Article
Engineering, Environmental
Nurul Syazana Fuzil, Nur Hidayati Othman, Nur Hashimah Alias, Fauziah Marpani, Muhammad Shafiq Mat Shayuti, Munawar Zaman Shahruddin, Mohd Rizuan Mohd Razlan, Norazah Abd Rahman, Woei Jye Lau, Mohd Hafiz Dzarfan Othman, Ahmad Fauzi Ismail, Tutuk Djoko Kusworo, Anwar Ul-Hamid
Summary: In this study, the performance of membrane distillation (MD) was improved by coating MoS2-TiO2 on a PVDF-based hollow fiber membrane. The MoS2-TiO2/PP20 membrane showed enhanced hydrophobicity and porosity, leading to significantly improved MD performances. This work suggests that the MoS2-TiO2 coating can overcome the typical permeability/rejection rate trade-off effect and play a significant role in enhancing MD performances.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Engineering, Chemical
Dong Zou, Hyun Woo Kim, Seong Min Jeon, Young Moo Lee
Summary: This study investigates the fabrication of PVDF/PSF hollow-fiber membranes with high mechanical strength and satisfactory water permeance using a green technique. The results show that hydrophobic coating fluid leads to higher water permeance, and hydrophobic modification improves the performance for separation of saline water.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Engineering, Chemical
Thi My Hanh Le, Sudkanueng Singto, Warayuth Sajomsang, Rattachat Mongkolnavin, Roongkan Nuisin, Pisut Painmanakul, Sermpong Sairiam
Summary: PVDF membranes were modified using pulse inductively coupled plasma (PICP) and grafted with chloroalkylsilanes to enhance hydrophobicity for dye wastewater treatment by ozonation membrane contactor. Oxygen plasma activation was more effective for functionalizing MTCS to improve hydrophobicity, while grafting with MTCS increased hydrophobicity and stability of ozone flux. Modification of membranes greatly improved water contact angle and led to efficient decolorization of DB 71 dye.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Biotechnology & Applied Microbiology
F. Abbasi, M. H. Jazebizadeh, A. Mansourizadeh, M. R. Hojjati
Summary: The study successfully enhanced the extraction efficiency of Pen-G from wastewater by preparing a structurally optimized PVDF-HFP hollow fiber membrane. Response surface methodology was used to optimize the main operating variables in the liquid-liquid membrane contactor process, predicting a maximum extraction flux of 1.55x10(-3) kg/m(2) s at the optimum operating conditions.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2021)
Article
Engineering, Environmental
Yunus Aksoy, Halil Hasar
Summary: The study demonstrated the usability of gas-permeable hollow fiber membranes produced with additives in a membrane biofilm reactor. These membranes showed increased oxygen gas diffusion coefficients, leading to improved nitrate reduction and ammonium oxidation. This cost-effective approach could help promote membrane biofilm technology.
JOURNAL OF WATER PROCESS ENGINEERING
(2021)
