Adsorption of Brilliant Green from Aqueous Solutions onto Crosslinked Chitosan Graft Copolymers

2011 ◽  
Vol 39 (11) ◽  
pp. 1001-1006 ◽  
Author(s):  
Bengi Özkahraman ◽  
Ayça Bal ◽  
Işıl Acar ◽  
Gamze Güçlü
2013 ◽  
Vol 52 (16-18) ◽  
pp. 3246-3255 ◽  
Author(s):  
Ayça Bal ◽  
Bengi Özkahraman ◽  
Işıl Acar ◽  
Mustafa Özyürek ◽  
Gamze Güçlü

e-Polymers ◽  
2008 ◽  
Vol 8 (1) ◽  
Author(s):  
Benjamin Nottelet ◽  
Julie Vendrell ◽  
Jean Coudane ◽  
Michel Vert

AbstractThe potential of novel amphiphilic water soluble and degradable poly(ε- caprolactone)-g-poly(L-lysine) as carriers for DNA transfection has been investigated. Two graft copolymers having the same proportion of lysine units but different structures have been synthesized following two grafting techniques. The chemical composition of these copolymers, their expected architectures and their behaviour in aqueous solutions have been studied. The benefits resulting from the use of these degradable polycationic structures as well as their ability to form polyplexes are discussed. Finally, preliminary transfection assays of MCF-7 cells by pRL-TK plasmid using poly(ε-caprolactone)-g-poly(L-lysine) copolymers as carriers are reported.


Desalination ◽  
2011 ◽  
Vol 275 (1-3) ◽  
pp. 154-159 ◽  
Author(s):  
Maria Lourdes P. Dalida ◽  
Ana Francia V. Mariano ◽  
Cybelle M. Futalan ◽  
Chi-Chuan Kan ◽  
Wan-Chi Tsai ◽  
...  

2020 ◽  
Vol 20 (10) ◽  
pp. 1220-1234
Author(s):  
Dan Zhang ◽  
Grégorio Crini ◽  
Eric Lichtfouse ◽  
Baker Rhimi ◽  
Chuanyi Wang

2016 ◽  
Vol 137 ◽  
pp. 51-59 ◽  
Author(s):  
Liying Kong ◽  
Fengxian Qiu ◽  
Zhenyu Zhao ◽  
Xiaoying Zhang ◽  
Tao Zhang ◽  
...  

2007 ◽  
Vol 146 (1-2) ◽  
pp. 39-50 ◽  
Author(s):  
Kensuke Fujiwara ◽  
Attinti Ramesh ◽  
Teruya Maki ◽  
Hiroshi Hasegawa ◽  
Kazumasa Ueda

2012 ◽  
Vol 463-464 ◽  
pp. 7-11 ◽  
Author(s):  
Ming Yan Dang ◽  
Hong Min Guo ◽  
Yan Kun Tan

Chitosan was crosslinked using epichlorohydrin as crosslinking agent to prepare crosslinked chitosan which was used as an adsorbent for the removal of Zn(II) from aqueous solutions. The adsorption prosperities of Zn(II) on crosslinked chitosan were studied, including the influence of pH value and the adsorption kinetics. The kinetics of adsorption was discussed using two kinetic models, the pseudo first-order and the pseudo second-order model. Results reveal that the crosslinked chitosan is suitable as adsorbent to remove Zn(II) from dilute solution. The rate parameters for the Zn(II) by crosslinked chitosan were also determined. It was shown that the adsorption kinetics of Zn(II) could be best described by the pseudo second-order model and the adsorption process may involve a physical adsorption.


Author(s):  
Andrey V. Sorokin ◽  
Marina G. Kholyavka ◽  
Maria S. Lavlinskaya

The aim of this work is to synthesise chitosan and N-vinylimidazole graft-copolymers of various compositions and to study the properties of their aqueous solutions.Chitosan and N-vinylimidazole graft-copolymers were obtained by solution polymerisation in the presence of a ceric ammonium nitrate redox initiator. The synthesised graft copolymers were characterised by FTIR to determine their compositions and the grafted side chains of poly-N-vinylimidazole were characterised by gel permeation chromatography to determine their molecular wights and polydispersity indices. It was established that the obtained products are characterised by high values of yield and grafting efficiency and low values of the polydispersity index. It was found that when the content of the N-vinylimidazole links is above 57 wt%, the synthesised graft copolymers are water-soluble. Aqueous solutions of the obtained copolymers were characterised using dynamic light scattering, transmission electron microscopy, and laserDoppler microelectrophoresis. The study showed that macromolecules of graft copolymers in aqueous solutions have stimuli-sensitive properties with respect to the medium reaction and at a concentration above 10–2 wt% are characterised by a tendency to self-association forming core-crown aggregates, the geometry of which depends on the molecular masses of the grafted chains. Associates of macromolecules in solutions are characterised by positive values of the electrokinetic potential, the values of which also depend on the medium reaction. Thus, it was found that the ceric ammonium nitrate initiator allows obtaining chitosan and N-vinylimidazole graft-copolymers showing stimuli-sensitive properties in aqueous solutions and prone to self-association at concentrations above 10–2 wt%.


Sign in / Sign up

Export Citation Format

Share Document