A novel nanofiltration membrane prepared with PAMAM and TMC by in situ interfacial polymerization on PEK-C ultrafiltration membrane

2006 ◽  
Vol 269 (1-2) ◽  
pp. 84-93 ◽  
Author(s):  
Li Lianchao ◽  
Wang Baoguo ◽  
Tan Huimin ◽  
Chen Tianlu ◽  
Xu Jiping
Keyword(s):  
Interfacial Polymerization ◽  
Ultrafiltration Membrane ◽  
Nanofiltration Membrane

An ultrahighly permeable-selective nanofiltration membrane mediated by an in situ formed interlayer

2020 ◽  
Vol 8 (10) ◽  
pp. 5275-5283 ◽  
Author(s):  
Yufan Hao ◽  
Quan Li ◽  
Benqiao He ◽  
Bo Liao ◽  
Xianhui Li ◽  
...  
Keyword(s):  
Interfacial Polymerization ◽  
Nanofiltration Membrane

An interlayer is in situ formed to regulate the morphologies and thickness of the polyamide layer during a chitosan assisted interfacial polymerization. The resulted NF membrane exhibits an ultrahigh permeability without compromising on selectivity.

Loose nanofiltration membrane for dye/salt separation through interfacial polymerization with in-situ generated TiO2 nanoparticles

2017 ◽  
Vol 410 ◽  
pp. 494-504 ◽  
Author(s):  
Qi Zhang ◽  
Lin Fan ◽  
Zhen Yang ◽  
Runnan Zhang ◽  
Ya-nan Liu ◽  
...  
Keyword(s):  
Tio2 Nanoparticles ◽  
Interfacial Polymerization ◽  
Nanofiltration Membrane

In Situ Electrochemical Generation of Reactive Chlorine Species for Efficient Ultrafiltration Membrane Self-Cleaning

2020 ◽  
Vol 54 (11) ◽  
pp. 6997-7007 ◽  
Author(s):  
Xiaoxiong Wang ◽  
Meng Sun ◽  
Yumeng Zhao ◽  
Chi Wang ◽  
Wen Ma ◽  
...  
Keyword(s):  
Ultrafiltration Membrane ◽  
Electrochemical Generation ◽  
Self Cleaning

scholarly journals Fabrication of High-Performance Thin-Film Composite Nanofiltration Membrane by Dynamic Calcium-Carboxyl Intra-Bridging during Post-Treatment

Membranes ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 137
Author(s):  
Hongyi Han ◽  
Ruobin Dai ◽  
Zhiwei Wang
Keyword(s):  
Thin Film ◽  
Water Purification ◽  
High Performance ◽  
Rejection Rate ◽  
Post Treatment ◽  
Nanofiltration Membrane ◽  
Film Composite ◽  
Thin Film Composite ◽  
Post Modification

Widespread applications of nanofiltration (NF) and reverse osmosis (RO)-based processes for water purification and desalination call for high-performance thin-film composite (TFC) membranes. In this work, a novel and facile modification method was proposed to fabricate high-performance thin-film composite nanofiltration membrane by introducing Ca2+ in the heat post-treatment. The introduction of Ca2+ induced in situ Ca2+-carboxyl intra-bridging, leading to the embedment of Ca2+ in the polyamide (PA) layer. This post modification enhanced the hydrophilicity and surface charge of NF membranes compared to the pristine membrane. More interestingly, the modified membrane had more nodules and exhibited rougher morphology. Such changes brought by the addition of Ca2+ enabled the significant increase of water permeability (increasing from 17.9 L·m−2·h−1·bar−1 to 29.8 L·m−2·h−1·bar−1) while maintaining a high selectivity (Na2SO4 rejection rate of 98.0%). Furthermore, the intra-bridging between calcium and carboxyl imparted the NF membranes with evident antifouling properties, exhibiting milder permeability decline of 4.2% (compared to 16.7% of NF-control) during filtration of sodium alginate solution. The results highlight the potential of using Ca2+-carboxyl intra-bridging post-treatment to fabricate high-performance TFC membranes for water purification and desalination.

Development of ultrafiltration membrane via in-situ grafting of nano-GO/PSF with anti-biofouling properties

2019 ◽  
Vol 142 ◽  
pp. 34-43 ◽  
Author(s):  
Mohammad Khajouei ◽  
Mahsa Najafi ◽  
Seyed Ahmad Jafari
Keyword(s):  
Ultrafiltration Membrane

scholarly journals Monitoring the Interfacial Polymerization of Piperazine and Trimesoyl Chloride with Hydrophilic Interlayer or Macromolecular Additive by in-situ FT-IR Spectroscopy

2019 ◽  
Author(s):  
Xi Yang
Keyword(s):  
Ir Spectroscopy ◽  
Reaction Rate ◽  
Interfacial Polymerization ◽  
Reaction System ◽  
Reaction Rates ◽  
Water Permeation ◽  
Ft Ir ◽  
Trimesoyl Chloride ◽  
Ft Ir Spectroscopy

The interfacial polymerization (IP) of piperazine (PIP) and trimesoyl chloride (TMC) has been extensively utilized to synthesize the nanofiltration (NF) membrane. However, it is still a huge challenge to monitor the IP reaction, because of the fast reaction rate and the formed ultra-thin film. Herein, two effective strategies are applied to reduce the IP reaction rate: (1) the introduction of hydrophilic interlayers between the porous substrate and the formed polyamide layer; (2) the addition of macromolecular additives in the aqueous solution of PIP. As a result, in-situ FT-IR spectroscopy was firstly used to monitor the IP reaction of PIP/TMC reaction system, with hydrophilic interlayers or macromolecular additives. Moreover, we study the formed polyamide layer growth on the substrate, in a real-time manner. The in-situ FT-IR experimental results confirm that the IP reaction rates are effectively suppressed and the formed polyamide thickness reduces from 138±24 nm to 46±2 nm. Furthermore, the optimized NF membrane with excellent performance are consequently obtained, which include the boosted water permeation flux about 141~238 (L·m2·h/MPa) and superior salt rejection of Na2SO4 > 98.4%.

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