Novel positively charged chiral chitosan composite nanofiltration membrane

2014 ◽  
Vol 6 (1) ◽  
pp. 33-38 ◽  
Author(s):  
T. Mu ◽  
X. Liu ◽  
G. Tan ◽  
K. Wang
Keyword(s):  
Nanofiltration Membrane ◽  
Chitosan Composite ◽  
Positively Charged

Novel Positively Charged Metal-Coordinated Nanofiltration Membrane for Lithium Recovery

2021 ◽  
Author(s):  
Li Wang ◽  
Danyal Rehman ◽  
Peng-Fei Sun ◽  
Akshay Deshmukh ◽  
Liyuan Zhang ◽  
...  
Keyword(s):  
Nanofiltration Membrane ◽  
Positively Charged

Toughened Chitosan Composite Nanofiltration Membrane by Introduction of Acrylic Acid

2019 ◽  
Vol 815 ◽  
pp. 139-144
Author(s):  
Tao Mu
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Tensile Strength ◽  
Acrylic Acid ◽  
Nanofiltration Membrane ◽  
Modified Chitosan ◽  
Atomic Force ◽  
Infrared Spectrophotometer ◽  
Chitosan Composite ◽  
Scanning Electron

In this paper, acrylic acid was grafted to chitosan in order to change the structure; polymer was obtained from modified chitosan. A series of novel toughened composite NF memebranes were prepared by over-coating the polysulfone ultrafiltration membrane with the polymer of modified chitosan. The chitosan derivatives and the polymer were characterised by infrared spectrophotometer (IR); the structure of the membrane was characrerised by scanning electron microscopy (SEM) and atomic force microscope (AFM). The composite NF membrane’s performances were strictly related to the structure of polymer. The rejection of the membrane was 96.3% with flux as high as 386.46 L m-2 h-1 with the 1000 mg/L of NaCl. Tensile strength of membrane increased 46%. The HCl (5%) resistance increased from 20.3 to 36.8h. The NaOH (5%) resistance increased from 18.3 to 31.6h. These results indicated the prepared toughened composite NF memebrane was excellent NF membrane, which had a wide application prospect.

A facile preparation of positively charged composite nanofiltration membrane with high selectivity and permeability

2019 ◽  
Vol 581 ◽  
pp. 214-223 ◽  
Author(s):  
Kaifeng Gu ◽  
Shuhao Wang ◽  
Yunhao Li ◽  
Xueting Zhao ◽  
Yong Zhou ◽  
...  
Keyword(s):  
High Selectivity ◽  
Nanofiltration Membrane ◽  
Facile Preparation ◽  
Positively Charged

Preparation of a positively charged nanofiltration membrane based on hydrophilic–hydrophobic transformation of a poly(ionic liquid)

2015 ◽  
Vol 3 (23) ◽  
pp. 12367-12376 ◽  
Author(s):  
Ying Tang ◽  
Beibei Tang ◽  
Peiyi Wu
Keyword(s):  
Aqueous Solution ◽  
Ionic Liquid ◽  
Ion Exchange ◽  
Exchange Reaction ◽  
Composite Membrane ◽  
Nanofiltration Membrane ◽  
High Permeability ◽  
Ion Exchange Reaction ◽  
Poly Ionic Liquid ◽  
Positively Charged

A positively charged NF composite membrane with high permeability was obtained via a simple counter-ion exchange reaction in an aqueous solution, due to the hydrophilic–hydrophobic transformation of the PIL.

scholarly journals An acid-stable positively charged polysulfonamide nanofiltration membrane prepared by interfacial polymerization of polyallylamine and 1,3-benzenedisulfonyl chloride for water treatment

RSC Advances ◽  
2019 ◽  
Vol 9 (4) ◽  
pp. 2042-2054 ◽  
Author(s):  
Hao Wang ◽  
Zhong Wei ◽  
Heyun Wang ◽  
Haoji Jiang ◽  
Yinchun Li ◽  
...  
Keyword(s):  
Water Treatment ◽  
Metal Ions ◽  
Interfacial Polymerization ◽  
Divalent Metal ◽  
Separation Performance ◽  
Nanofiltration Membrane ◽  
Divalent Metal Ions ◽  
Acid Stable ◽  
Positively Charged

Here, an acid stable PSA membrane with positively charge was prepared through the IP between macromolecular PAH and BDSC on PES substrate. In addition, the PSA membrane exhibited excellent separation performance to divalent metal ions.

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