Study of structure–performance relationships of polymeric dispersants on particle dispersion and stabilisation

Abstract

Three different structural types of polymeric dispersants were synthesised, optimised and systematically compared over SiO2 particle dispersion, developing structure–performance relationships.

Synthesis ofSMA‐PEGhyperdispersant and its stabilization mechanism for carbon black

“…For example, the polymeric dispersants with comb-like structures, display effectiveness in dispersing and stabilizing pigment particles based on their functional groups such as amines, carboxylic acids, sulfonic acids, and phosphoric acids on the main chains, which can be firmly adsorbed on the pigment particle surface, and their side chain of hydrophilic polymers such as polyethers or polyacrylates extending to the aqueous phase and thus playing a space or electrostatic repulsion stabilizing role. [8][9][10] In recent years, the application of polycarboxylate comb-like dispersants for the dispersion of pigments and dyes has attracted a lot of attention in the field of science and technology. [11][12][13][14][15] According to the adsorption and dispersion mechanism of dispersants, the structure and composition of polycarboxylate comb-like dispersants such as the molecular weight, side chain length and density will have important effects on the dispersion efficiency.…”

“…As an alternative, high molecular weight polymeric dispersants have been recently developed for more stable and effective pigment dispersion. For example, the polymeric dispersants with comb‐like structures, display effectiveness in dispersing and stabilizing pigment particles based on their functional groups such as amines, carboxylic acids, sulfonic acids, and phosphoric acids on the main chains, which can be firmly adsorbed on the pigment particle surface, and their side chain of hydrophilic polymers such as polyethers or polyacrylates extending to the aqueous phase and thus playing a space or electrostatic repulsion stabilizing role 8–10 …”

Toughening of epoxy thermosets by self-assembled nanostructures of amphiphilic comb-like random copolymers

“…41 Additionally, Fang et al polymerized comb-like random copolymers from poly(propylene glycol) acrylate (PPGA) and 2-(dimethylamino)ethyl methacrylate (DMA) as polymeric dispersants for dispersing SiO 2 particles in organic media. 42 These examples indicate that amphiphilic random copolymers are possible to be used as surfactants, emulsion agents, or polymeric dispersants for various applications, especially for methacrylate-based or acrylate-based random copolymers with a comb-like architecture. The dispersion effectiveness or assembly behavior of amphiphilic random copolymers may not be as good as that of amphiphilic block copolymers.…”