Positively Charged Polysulfonamide Nanocomposite Membranes Incorporating Hydrophilic Triazine-Structured COFs for Highly Efficient Nanofiltration

AbstractThe BMIM+NO3-/Ag metal nanocomposite membranes were utilized for separation of propylene/propane mixtures. The selectivity of propylene/propane and the mixed gas permeance increased to 10 and 1.3 GPU, respectively. It is anticipated that the interactions between NO3- of BMIM+NO3- and the surface of silver nanoparticles causes the Ag surface to be partially positively charged, resulting in the reversible complexation with propylene and consequently facilitated propylene transport. The surface positive charge was confirmed from the increase in the binding energy of the d5/2 orbital of the silver nanoparticles by x-ray photoelectron spectroscopy. It increased from 368.26 for the neat silver nanoparticles to 368.47 eV for BMIM+NO3-/Ag metal composite. The positively charged surface of silver nanoparticles can be utilized as a new durable olefin carrier for facilitated transport.

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Filter‐Through Method of Making Highly Efficient Polymer‐Clay Nanocomposite Membranes

Macromolecular Materials and Engineering ◽

10.1002/mame.201800779 ◽

2019 ◽

Vol 304 (7) ◽

pp. 1800779

Author(s):

Jian Zhu ◽

Christoph Habel ◽

Theresa Schilling ◽

Andreas Greiner ◽

Josef Breu ◽

...

Keyword(s):

Nanocomposite Membranes ◽

Highly Efficient ◽

Polymer Clay Nanocomposite

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Preparation of positively charged thin-film nanocomposite membranes based on the reaction between hydrolyzed polyacrylonitrile containing carbon nanomaterials and HPEI for water treatment application

Separation and Purification Technology ◽

10.1016/j.seppur.2020.116826 ◽

2020 ◽

Vol 242 ◽

pp. 116826 ◽

Cited By ~ 6

Author(s):

Elham Valamohammadi ◽

Fatemeh Behdarvand ◽

Maryam Ahmadzadeh Tofighy ◽

Toraj Mohammadi

Keyword(s):

Thin Film ◽

Water Treatment ◽

Carbon Nanomaterials ◽

Nanocomposite Membranes ◽

Treatment Application ◽

Positively Charged ◽

Thin Film Nanocomposite

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Protamine-DNA interaction

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100081863 ◽

1978 ◽

Vol 36 (2) ◽

pp. 200-201

Author(s):

D.P. Bazett-Jones ◽

F.P. Ottensmeyer

Keyword(s):

Small Volume ◽

Double Helix ◽

Dna Interaction ◽

Dark Field ◽

Sperm Head ◽

Nuclear Proteins ◽

Field Electron Microscopy ◽

Dark Field Electron ◽

Dna Double Helix ◽

Positively Charged

Dark field electron microscopy has been used for the study of the structure of individual macromolecules with a resolution to at least the 5Å level. The use of this technique has been extended to the investigation of structure of interacting molecules, particularly the interaction between DNA and fish protamine, a class of basic nuclear proteins of molecular weight 4,000 daltons.Protamine, which is synthesized during spermatogenesis, binds to chromatin, displaces the somatic histones and wraps up the DNA to fit into the small volume of the sperm head. It has been proposed that protamine, existing as an extended polypeptide, winds around the minor groove of the DNA double helix, with protamine's positively-charged arginines lining up with the negatively-charged phosphates of DNA. However, viewing protamine as an extended protein is inconsistent with the results obtained in our laboratory.

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