Preparation of microencapsulated phase change materials for use in feminine hygiene napkins based on pH response

To create pH-responsive microcapsules, the research involved microencapsulating n-eicosane phase change material (PCM) with poly(MAA-co-ACR-co-ACN) for application on sanitary napkins. The in-situ polymerization technique was employed for polymer synthesis. SEM, FTIR, and TGA were used to verify the chemical structure and composition of pH-responsive microcapsules through morphology and core-shell structure analysis. The free swell capacity and absorption under load in tap water and saline solution were used to evaluate the absorbency of pH-responsive coated sanitary napkins. Furthermore, strike through and the pH level of every coated sample was investigated. Microcapsule coated napkins have an acidic pH value, and they are better suited for maintaining the acidic pH of the vagina during menstruation, as at the time of menstruation, pH of the blood is alkaline. So, the present work suggests the pH-responsive microcapsules for coating the top layer of feminine napkin and the comparative result suggested by SEM, FTIR, TGA, absorbency capacity, strike through and pH, clearly supports the process.