Synthesis and characterization of dodecanol/polymer phase change nanocapsules via miniemulsion polymerization

The phase change nanocapsules(PCNs) with n-dodecanol as core and St-BA-AM co-polymer as shell were prepared by miniemulsion polymerization.The influence of emulsifier,co-monomer and the mass ratio of styrene to n-dodecanol on the structure and properties of nanocapsules were studied.The particles size and distribution,structure,properties and micro-morphology of nanocapsules were characterized by using DSC,TG,TEM,and laser particle diameter analyzer.The results showed that co-monomer acrylamine(AM) is helpful for encapsulation of n-dodecanol.As the mass ratio of styrene to n-dodecanol was 1∶1,the phase change latent heat of nanocapsule and encapsulation efficiency of n-dodecanol reach to the highest value of 109.3J/g and 92.1%,respectively.