Interactions of hairy latex particles with cationic copolymers
Interactions between polycations and core–corona particles are governed by ion-exchange reactions, entropically favored by the release of counterions. This complexation process allows the chains to penetrate into the shell, leading to adsorbed amounts greater than 1 mg m −2. The destabilization occu...
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| Veröffentlicht in: | Journal of colloid and interface science 2005-04, Vol.284 (2), p.560-570 |
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| container_end_page | 570 |
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| container_title | Journal of colloid and interface science |
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| creator | Borget, Pascal Lafuma, Françoise Bonnet-Gonnet, Cécile |
| description | Interactions between polycations and core–corona particles are governed by ion-exchange reactions, entropically favored by the release of counterions. This complexation process allows the chains to penetrate into the shell, leading to adsorbed amounts greater than 1 mg m
−2. The destabilization occurs quickly, the domain of flocculation becomes larger when the concentration of monovalent salts is increased, and aggregates are composed of small and very compact clusters in a more or less self-similar structure at large scale. The adsorption of copolymers of low cationicity is characterized by still larger adsorbed amounts and layers thicker than the radius of gyration of the macromolecules. Depending on the charge content, the enhancement of the ionic strength can either promote the destabilization of the suspension or conversely induce the desorption of the chain. In pure water the structure of the flocs is long-range ordered and it becomes more heterogeneous in ionic media. |
| doi_str_mv | 10.1016/j.jcis.2004.10.061 |
| format | Article |
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| language | eng |
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| subjects | Adsorption Cationic copolymer Chemistry Core–corona particle Exact sciences and technology Flocculation General and physical chemistry Small angle neutron scattering Soft surface Surface physical chemistry |
| title | Interactions of hairy latex particles with cationic copolymers |
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