Surfactant-modulation of the cationic-polymer-induced aggregation of anionic particulate dispersions
| Autor: | Martin Crossman, Wasiu Abdullahi, Peter C. Griffiths |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Polymers and Plastics
Ionic bonding 02 engineering and technology 010402 general chemistry Q1 01 natural sciences Micelle Article lcsh:QD241-441 Colloid lcsh:Organic chemistry Pulmonary surfactant flocculation solvent relaxation Surface charge Physics::Chemical Physics polyelectrolyte chemistry.chemical_classification Cationic polymerization bridging flocculation General Chemistry Polymer 021001 nanoscience & nanotechnology Polyelectrolyte 0104 chemical sciences Condensed Matter::Soft Condensed Matter polyelectrolyte-surfactant interactions chemistry Chemical engineering charge-charge interactions 0210 nano-technology |
| Zdroj: | Polymers Polymers, Vol 12, Iss 2, p 287 (2020) Volume 12 Issue 2 |
| Popis: | Commodity formulations contain many chemically distinct components and their mutual interactions define the beneficial characteristics of the formulation. Mixing oppositely charged polymers and surfactants invariably induces macroscopic phase separation, to a degree dependent on the prevailing polymer and surface charge densities, and the interaction can be modulated by added ionic surfactants. Here, it is shown that a general universality exists between the charge present on a series of cationic-modified cellulose polymers&mdash the charge being controlled either by the degree of cationic modification of the polymer itself or through the subsequent level of anionic surfactant binding&mdash and its capacity to remove anionic colloidal material from solution, be that silica particles or polystyrene-butadiene lattices. Particulate material not removed from solution bears no adsorbed polymer, i.e., the particle surface is bare. Addition of nonionic surfactant does not negate this universality, implying that the nonionic surfactant is largely a spectator molecule or structure (micelle) in these systems, and that the dominant force is an electrostatic one. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|