Abstract
Agglomeration and low stability of layered double hydroxides (LDHs) suspended in water significantly affects its properties for water base applications. In this study, the stability of LDHs suspended in water was improved by using bead milling for size reduction and by surface treatment with tri-sodium citrate. The result showed that bead milling technique can reduce the agglomeration and induce the adsorption of tri-sodium citrate on LDHs without intercalation. Following redispersion in water, the stability of citrate-modified LDHs was >1 hr with particle size around 177 nm, whereas the particle size of unmodified LDHs was around 40 μm with fast sedimentation.
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