Investigation of Membrane Emulsification for the Scaled Production of Microcapsules for Self-sealing Cementitious Systems

Capsule-based self-sealing in cementitious systems is an advantageous methodology which has the potential to decrease water ingress and thus enhance a system’s durability extend its lifespan. If capsule-based be considered as industrial solution, production must scaled while capsule quality batch reproducibility are maintained. In this study, polyurethane-shelled microcapsules containing commercially available repellent agent were produced using membrane emulsification equipment, supplied by Micropore Technologies, followed interfacial polymerisation. Production was across three different cross-flow devices, AXF-1, AXF-3, AXF-4, increasing output maximum of 850 L/hr suspension. Following production, capsules characterised, measuring average size distribution, well integrated into matrix. The results highlight key parameters that govern size, versatility consistent produced. It hoped will help develop commercial viability systems.