Add time:07/30/2019         Source:sciencedirect.com

It is still a challenge to disperse yellow iron oxides in organic media due to their susceptible aggregation, which limits their application in ceramic material area. In order to achieve colloidal stabilization in organic liquid, yellow iron oxides were dispersed in ethanol with p[methyl methacrylate-r-butyl methacrylate-r-N-(3-dimethylaminopropyl) methacrylamide] random copolymers (PMBAs) based on amino groups as anchoring groups and alkyl as solvent chains by reversible-addition fragmentation chain-transfer radical (RAFT) polymerization. The effect of PMBAs on viscosity, rheological properties and dispersion stability was investigated.In the presence of PMBAs, yellow iron oxide dispersion performed excellent colloidal stability and low viscosity with high solid loadings. Furthermore, it is suggested that PMBAs have outstanding dispersion ability, retarding yellow iron oxides aggregating and keeping it stable for more than 60 days at ambient temperature. This study reveals that PMBAs might find promising application in material dispersion area.

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