摘要
The suspension-like polymerization method is used to obtain poly methyl methacrylate （PMMA）/paraffin wax microcapsules and micro/nanocapsules with high core content. Particle size distribution （PSD） analysis indicates that the average particle size of microcapsules is 94 μm, and the size of micro/nanocapsules ranges in 0.1-19 μm. Differential scanning calorimetry （DSC） and thermalgravimetric analysis （TGA） results show that the fabricated paraffin contents in microcapsules and micro/nanocapsules are as high as 89.5 wt% and 80~2 wt%, respectively with good thermal stability. Thermal cycling tests justify that both the microcapsules and micro/nanocapsules have good thermal reliability with respect to the changes in their thermal properties after 1000 thermal cycling. This work pro- vides a novel method to prepare microcapsules and micro/nanocapsules with high core content which may benefit further study on thermal energy storage.
The suspension-like polymerization method is used to obtain poly methyl methacrylate （PMMA）/paraffin wax microcapsules and micro/nanocapsules with high core content. Particle size distribution （PSD） analysis indicates that the average particle size of microcapsules is 94 μm, and the size of micro/nanocapsules ranges in 0.1-19 μm. Differential scanning calorimetry （DSC） and thermalgravimetric analysis （TGA） results show that the fabricated paraffin contents in microcapsules and micro/nanocapsules are as high as 89.5 wt% and 80~2 wt%, respectively with good thermal stability. Thermal cycling tests justify that both the microcapsules and micro/nanocapsules have good thermal reliability with respect to the changes in their thermal properties after 1000 thermal cycling. This work pro- vides a novel method to prepare microcapsules and micro/nanocapsules with high core content which may benefit further study on thermal energy storage.
基金
This work was supported by the National Natural Science Foundation of China （Nos. 20973022 and11472048）.
