Using Aerosol OT in Hexane Solution to Synthesize Calcium Nitrate Self-Healing Refined Microcapsules for Construction Applications

The micro-encapsulation procedure of calcium nitrate in urea-formaldehyde shell is well known. most recent developed method for the synthesis self-healing micro-capsules was based on in-situ polymerization using water-in-oil emulsion. Although microcapsules’ yield significantly improved this approach, incorporating into concrete mixes has been found to reduce strength. One potential strength reduction cause might be presence sulfonic acid as a component continuous (oil) phase. As anionic surfactant, Aerosol OT (AOT) widely used prepare emulsions and form aggregates non-polar solvents; submicron refined microcapsules were synthesized AOT hexane solution. While aqueous phase original encapsulation not altered, organic prepared by dissolving hexane. characterized Scanning Electron Microscopy (SEM). preliminary assessment effect cementitious materials carried out preparing mortar 75% capsules’ concentration (by weight cement). reported values, average thickness, diameter satisfactory. Moreover, samples containing that proposed did experience significant their mechanical properties. Hence, such may adopted further investigation efficiency procedure. Future work shall directed towards end.