Chloridion response of the microcapsule shelled with polystyrene- cuprous chloride composite

Microcapsules with response to chemicals have a variety of potential applications, for example, embedding chloridiontriggered microcapsule containing repairing agent or corrosion inhibitor in steel reinforced concrete is considered to be an effective measures to protect marine construction against chloride attack. In this paper, a chloridionsensitive microcapsule was designed and synthesized based on the following reaction : CuCl↓+Cl → [CuCl2] (s) This microcapsule was consists of polystyrene-cuprous chloride (PS-CuCl) composite shell and epoxy resin core. It forms in a solvent-evaporation process at 40C. Soaked the result microcapsule in 3.5% NaCl artificial sea water, cuprous chloride was dissolved in a short time. SEM observation shows the shell was hiascent in one houre, and collapsed after 5 hours.