Phase change paraffin at 36℃ was used as the core material,and natural polymer chitosan modified by nano-TiO2 was used as the wall material to prepare phase change microcapsules with anti-UV functionality by emulsion crosslinking method.The effects of different factors on the properties of microcapsules were investigated.The optimized experimental results were obtained and revealed that the encapsulation efficiency of the microcapsules was 81.61％,when emulsifier dosage was 10%,oil-water ratio was 3∶1 and nano-TiO2 dosage was 0.12g.Through the analysis of scanning electron micrograph (SEM),differential scanning calorimetry (DSC),thermogravimetric analyzer (TGA) and UV-Vis spectrophotometer,the results showed that the microcapsule had smooth surface,regular morphology,latent heat of phase change of 118.90J/g,good thermal cycle and thermal stability,as well as UV shielding function.
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基金资助
国家自然科学基金(51503084);中国博士后科学基金项目(2016M601713);江苏省博士后科学基金项目(1601068C)
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