1.安徽建筑大学安徽省先进建筑材料重点实验室，安徽 合肥 230022;2.1.安徽职业技术学院建筑工程学院，安徽 合肥 230061;3.2.安徽建筑大学安徽省先进建筑材料重点实验室，安徽 合肥 230022
Anionic silicon-containing waterborne polyurethane prepolymer was prepared by introducing hydroxyl terminated silicone oil ( PDMS-OH ) into polyurethane prepolymer chain segment and using dimethylol propionic acid (DMPA) as hydrophilic chain extender. The anionic silicon-containing waterborne polyurethane prepolymer was polymerized with propylene glycol diacrylate (TPGDA) to encapsulate paraffin core material, and the phase change energy storage microcapsule material of anionic silicon-containing waterborne polyurethane shell material was obtained. The effects of PDMS-OH and polyether polyol (PPG2000) on the properties of phase change energy storage microcapsule were analyzed. The results show that PDMS-OH had been successfully incorporated into the main chain of polyurethane prepolymer, and the shell material had been successfully coated with paraffin core material. The introduction of PDMS-OH improved the mechanical strength of the shell material, and the core material encapsulation rate of phase change energy storage microcapsules was improved. Of the PU90/10 MicroPCMs, the melting enthalpy was 157.25 J/g, the crystallization enthalpy was 183.17 J/g, and the paraffin content was 75.43%. The introduction of PDMS-OH also reduced the particle size of the latex beam in the emulsion, and the minimum particle size was 181.45 nm, which greatly reduced the leakage of the microcapsule core material. In addition, with the increase of PDMS-OH / PPG2000 molar ratio, the weight loss rate of the first stage decomposition increased, and the weight loss rate of PU90 / 10 MicroPCMs was 73.40 %, which indicated that the coating ratio was further improved.