Abstract: Polymethyl methacrylate (PMMA) is used as shell material to prepare aromatic oil slow release microcapsules by solvent evaporation method.The effects of preparation parameters on the particle size and surface topography of microcapsules are investigated.The results show that the prepared microcapsules have good coating performance,smooth surface and uniform sizes with average particle size being about 60 μm when the gelatin-sodium dodecyl sulfate (SDS) is used as composite surfactant,the mass ratio of core material to shell material is 1:1 and the shear speed is 700 r·min-1.The thermal stability of the microcapsules is studied by thermogravimetric experiments.The results indicate that the evaporation rate of aromatic oil microcapsules is only 31.8% when it is heated for 4 h at 205℃,far lower than 58.4%-the evaporation rate of aromatic oil.It proves that these microcapsules can significantly slow down the release rate of aromatic oil,which provides the feasibility for the application of aromatic oil controlled release microcapsules in asphalt.
阎鑫, 惠小艳, 高强, 闫从祥, 艾涛, 赵鹏, 王振军. 芳烃油缓释微胶囊的制备及缓释性能研究[J]. 现代化工, 2017, 37(9): 127-130.
YAN Xin, HUI Xiao-yan, GAO Qiang, YAN Cong-xiang, AI Tao, ZHAO Peng, WANG Zhen-jun. Preparation of slow release microcapsule for aromatic oil and its performance study. Modern Chemical Industry, 2017, 37(9): 127-130.
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