Aerosol OT Quantity Impacts on Calcium Nitrate Self-Healing Microcapsule Properties Used for Sustainable Construction Applications

This paper is a continuation of previously published on this issue that studied the microencapsulation calcium nitrate in urea-formaldehyde shell using Aerosol OT (AOT) hexane solution. The aim to determine quantity AOT optimizes microcapsule distribution, diameter, and thickness. Different quantities AOT, namely 0.25 g, 0.50 1.5 2.5 g were dissolved 180 solution prepare continuous phase. A Scanning Electron Microscopy (SEM) was used characterize distribution diameters prepared microcapsules. Transmission (TEM) investigate thicknesses. SEM images have shown may be insufficient totally polymerize whole core materials into fully independent capsules. On other hand, has uniform almost complete polymerization material components distinct Higher (i.e., 1.50 g) resulted agglomerated microcapsules nonuniform distributions. results also demonstrated does not significant impact diameter. Microcapsule average thicknesses found decrease by increasing amount up increase again due agglomeration witnessed for increased quantity. Accordingly, recommended preparation future research work.