Bio-based alternative for encapsulating fragrance oils in epoxy resin microcapsules

Trends on Reinforced Polymer Composites – A Review

“…The most common component of epoxy resins is diglycidyl ether bisphenol A (DGEBA). DGEBA is industrially synthesized by reacting bisphenol A (BPA) with a large excess of epichlorohydrin under alkaline conditions [125]. The behavior of the resin depends on certain factors such as time, temperature, curing speed and pressure on the curing process.…”

Hydrolyzable Quaternary Pyridinium Surfactants: Antimicrobial Profragrances for Controllable Perfume Release

“…Inherently, the high volatility of fragrance molecules can provide an efficient olfactory effect, especially the top notes with a vapor pressure of more than 0.13 mbar are evaporated completely in a couple of hours . For achieving the controllable release of fragrances, − physical encapsulation is developed as an attractive technique to trap the volatile fragrances with synthetic polymers, natural materials, nanoporous carbon, or metal–organic frameworks. − As such, the capsule technology has already been commercialized in the detergent, food, and pharmaceutical industries. In sharp contrast to encapsulation, Herrmann and others specialized the concept of profragrances by designing a class of nonvolatile precursors in which the volatile fragrances were stored by covalent bonding. ,− Under specific external conditions, such as UV light, hydrolysis, heat, or enzyme catalysis, fragrances were controllably released by the cleavage of covalent bonds. − Among them, hydrolysis is one of the most promising means in practical applications in presence of humidity.…”