Crosslinked polyelectrolyte complex fiber membrane based on chitosan–sodium alginate by freeze-drying

RSC Advances ◽  
2014 ◽  
Vol 4 (78) ◽  
pp. 41551-41560 ◽  
Author(s):  
Chengling Jiang ◽  
Zhiliang Wang ◽  
Xueqin Zhang ◽  
Xiaoqun Zhu ◽  
Jun Nie ◽  
...  
Keyword(s):  
Sodium Alginate ◽  
Formation Mechanism ◽  
Freeze Drying ◽  
Polyelectrolyte Complex ◽  
Fiber Membrane

The formation mechanism polyelectrolyte complex nanofibers during the process of freeze drying.

scholarly journals Freeze drying of polyelectrolyte complex nanoparticles: Effect of nanoparticle composition and cryoprotectant selection

2018 ◽  
Vol 552 (1-2) ◽  
pp. 27-38 ◽  
Author(s):  
Anita Umerska ◽  
Krzysztof J. Paluch ◽  
Maria Jose Santos-Martinez ◽  
Owen I. Corrigan ◽  
Carlos Medina ◽  
...  
Keyword(s):  
Freeze Drying ◽  
Polyelectrolyte Complex

Use of Natural Biopolymers to Create Nanocomposite Materials

2020 ◽  
Vol 299 ◽  
pp. 299-304
Author(s):  
A.O. Makarova ◽  
L.R. Bogdanova ◽  
O.S. Zueva
Keyword(s):  
Carbon Nanotubes ◽  
Composite Materials ◽  
Sodium Alginate ◽  
Freeze Drying ◽  
Nanocomposite Materials ◽  
High Porosity ◽  
Composite Hydrogels ◽  
Xerogel Films

Method of carbon nanotubes disaggregation with the help of protein material, gelatin, has been proposed which facilitate to disperse evenly nanotubes in hydrogels based on gelatin and polysaccharides (sodium alginate or κ-carrageenan). In the obtained composite hydrogels carbon nanotubes are located in the biopolymer matrix, i.e. being in biocompatible form without losing their unique properties. The removal of water from the pores of the hydrogel by means of freeze drying allowed to obtain materials having high porosity and with included carbon nanotubes. The produced hydrogels can be used to create eco-friendly composite materials for biomedical and technical purposes. Depending on the tasks the developed systems can also be used in the forms of xerogel (films), cryogel, aerogel, and even in the form of powder, containing carbon nanotubes.

scholarly journals The Effect of Ca and Mg Ions on the Filtration Profile of Sodium Alginate Solution in a Polyethersulfone-2-(methacryloyloxy) Ethyl Phosphorylchloline Membrane

Water ◽  
2018 ◽  
Vol 10 (9) ◽  
pp. 1207 ◽  
Author(s):  
Nasrul Arahman ◽  
Suffriandy Satria ◽  
Fachrul Razi ◽  
M. Bilad
Keyword(s):  
Sodium Alginate ◽  
Relative Permeability ◽  
Hollow Fiber ◽  
Membrane Fouling ◽  
Membrane Filtration ◽  
Hollow Fiber Membrane ◽  
Pure Water ◽  
Fiber Membrane ◽  
Cake Layer ◽  
The Stability

The efforts to improve the stability of membrane filtration in applications for wastewater treatment or the purification of drinking water still dominate the research in the field of membrane technology. Various factors that cause membrane fouling have been explored to find the solution for improving the stability of the filtration and prolong membrane lifetime. The present work explains the filtration performance of a hollow fiber membrane that is fabricated from polyethersulfone-2-(methacryloyloxy) ethyl phosphorylchloline while using a sodium alginate (SA) feed solution. The filtration process is designed in a pressure driven cross-flow module using a single piece hollow fiber membrane in a flow of outside-inside We investigate the effect of Ca and Mg ions in SA solution on the relative permeability, membrane resistance, cake resistance, and cake formation on the membrane surface. Furthermore, the performance of membrane filtration is predicted while using mathematical models that were developed based on Darcy’s law. Results show that the presence of Ca ions in SA solution has the most prominent effect on the formation of a cake layer. The formed cake layer has a significant effect in lowering relative permeability. The developed models have a good fit with the experimental data for pure water filtration with R2 values between 0.9200 and 0.9999. When treating SA solutions, the developed models fit well with experimental with the best model (Model I) shows R2 of 0.9998, 0.9999, and 0.9994 for SA, SA + Ca, and SA + Mg feeds, respectively.

Sodium alginate–gelatin polyelectrolyte complex membranes with both high water vapor permeance and high permselectivity

2011 ◽  
Vol 375 (1-2) ◽  
pp. 304-312 ◽  
Author(s):  
Yifan Li ◽  
Huiping Jia ◽  
Qinglai Cheng ◽  
Fusheng Pan ◽  
Zhongyi Jiang
Keyword(s):  
Water Vapor ◽  
Sodium Alginate ◽  
Polyelectrolyte Complex ◽  
High Water

scholarly journals Single-step synthesis of a polyelectrolyte complex hollow-fiber membrane for forward osmosis

2021 ◽  
Vol 264 ◽  
pp. 118430
Author(s):  
M. Mohammadifakhr ◽  
J. de Grooth ◽  
K. Trzaskus ◽  
H.D.W. Roesink ◽  
A.J.B. Kemperman
Keyword(s):  
Hollow Fiber ◽  
Polyelectrolyte Complex ◽  
Hollow Fiber Membrane ◽  
Forward Osmosis ◽  
Single Step ◽  
Fiber Membrane
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