Preparation and structure characterization of control-released fragrant PVA microcapsules

Fragrant microcapsules was synthesized by interfacial polymerization using polyvinyl alcohol as sheath material,rose perfume as core,and glutaraldehyde as the crosslinking agent.The effects of reaction temperature,sheath /core ratio,dosages of emulsifier and crosslinking agent on the shape and control release properties of the microcapsules were studied.Fourier transform infrared spectroscopy was used to examine the particle size distribution and structure of the microcapsules.The results showed that microcapsules with a diameter of 47.771 6 μm can be obtained under the following process conditions:emulsifier 0.15 g,sheath / core ratio = 2∶ 3,hydrochloric acid(as catalyst) 1 mL,glutaraldehyde 2 mL,reacting at 40 ℃ for 3 h.