Mixed Polyelectrolyte Brush from Oppositely Charged Polymers for Switching of Surface Charge and Composition in Aqueous Environment

2003 ◽  
Vol 36 (16) ◽  
pp. 5897-5901 ◽  
Author(s):  
Nikolay Houbenov ◽  
Sergiy Minko ◽  
Manfred Stamm
Keyword(s):  
Surface Charge ◽  
Aqueous Environment ◽  
Polyelectrolyte Brush ◽  
Charged Polymers ◽  
Oppositely Charged

Effect of Fe/Al oxides on desorption of Cd2+ from soils and minerals as related to diffuse layer overlapping

Soil Research ◽  
2011 ◽  
Vol 49 (3) ◽  
pp. 231 ◽  
Author(s):  
Yan-ping Wang ◽  
Ren-kou Xu ◽  
Jiu-yu Li
Keyword(s):  
Charge Density ◽  
Surface Charge ◽  
Surface Charge Density ◽  
Charged Particles ◽  
Double Layers ◽  
Mineral Particles ◽  
Variable Charge ◽  
Electrical Double Layers ◽  
Oppositely Charged ◽  
Positively Charged

Cadmium is a toxic metal with high reactivity in acid variable charge soils. Adsorption and desorption of Cd2+ in soil and mineral particles can be affected by the interaction between the electrical double layers on oppositely charged particles, because the interaction can decrease the surface-charge density of the particles. We studied the effect of Fe/Al oxides on desorption of Cd2+ from soils and minerals and proposed the desorption mechanisms based on the overlapping of diffuse layers between negatively charged soils and mineral particles and positively charged Fe/Al oxide particles. Our results indicate that the overlapping of diffuse layers of electrical double layers between positively charged Fe/Al oxides [crystalline and amorphous Al(OH)3 and amorphous Fe(OH)3] and negatively charged Ultisol, Alfisol, kaolinite, and bentonite caused the effective negative surface-charge density on the soils and minerals to become less negative, and thus the adsorption affinity of these negatively charged surfaces for Cd2+ declined as a result of the incorporation of the Fe/Al oxides. Consequently, the release of exchangeable Cd2+ from the surfaces of the soils and minerals increased with the amount of Fe/Al oxides added. The more positive the charge on the surfaces of the Fe/Al oxides, the stronger the interaction of the electrical double layers between the oxides and soils and minerals, and thus the greater the release of Cd2+ from the soils and minerals. A decrease in pH led to an increase in the positive surface charge on the Fe/Al oxides and enhancement of the interaction of the electrical double layers between the oxides and soils and minerals. As a result, more Cd2+ was desorbed from the soils and minerals. This study suggests that the interaction between oppositely charged particles of variable charge soils can enhance the mobility of cadmium in the soils and thus increase its environmental risk.

Multilayers of Oppositely Charged SiO2Nanoparticles:  Effect of Surface Charge on Multilayer Assembly

Langmuir ◽  
2007 ◽  
Vol 23 (17) ◽  
pp. 8833-8837 ◽  
Author(s):  
Daeyeon Lee ◽  
Zekeriyya Gemici ◽  
Michael F. Rubner ◽  
Robert E. Cohen
Keyword(s):  
Surface Charge ◽  
Oppositely Charged ◽  
Effect Of Surface

Complexes of surfactants with oppositely charged polymers at surfaces and in bulk

2010 ◽  
Vol 155 (1-2) ◽  
pp. 32-49 ◽  
Author(s):  
C.D. Bain ◽  
P.M. Claesson ◽  
D. Langevin ◽  
R. Meszaros ◽  
T. Nylander ◽  
...  
Keyword(s):  
Charged Polymers ◽  
Oppositely Charged

scholarly journals Inverted critical adsorption of polyelectrolytes in confinement

Soft Matter ◽  
2015 ◽  
Vol 11 (22) ◽  
pp. 4430-4443 ◽  
Author(s):  
Sidney J. de Carvalho ◽  
Ralf Metzler ◽  
Andrey G. Cherstvy
Keyword(s):  
Charged Surfaces ◽  
Charged Polymers ◽  
Oppositely Charged

What are the fundamental laws for the adsorption of charged polymers onto oppositely charged surfaces, for convex, planar, and concave geometries?

Toughening hydrogels by immersing with oppositely charged polymers

2016 ◽  
Vol 54 (23) ◽  
pp. 2432-2441 ◽  
Author(s):  
Yang Li ◽  
Xin Peng ◽  
Di Zhao ◽  
Shengjie Shi ◽  
Changcheng He ◽  
...  
Keyword(s):  
Charged Polymers ◽  
Oppositely Charged

A New Approach to the Phase Behavior of Oppositely Charged Polymers and Surfactants

2002 ◽  
Vol 106 (5) ◽  
pp. 1013-1018 ◽  
Author(s):  
Anna Svensson ◽  
Lennart Piculell ◽  
Bernard Cabane ◽  
Philippe Ilekti
Keyword(s):  
Phase Behavior ◽  
New Approach ◽  
Charged Polymers ◽  
Oppositely Charged
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