title: The effect of different soft segments on the formation and properties of binary core microencapsulated phase change materials with polyurea/polyurethane double shell.
abstract: A series of polyurea/polyurethane microcapsules with butyl stearate and paraffin as binary core materials are successfully synthesized via interfacial polymerization method. The phase change temperature of these microencapsulated phase change materials (micro-PCMs) can be adjusted by regulating the composition of the binary core. SEM photographs show that these micro-PCMs have relatively spherical profiles and compact surfaces with diameter ranging from 5 to 15 μm. DSC results indicate that the binary core content in micro-PCMs is in a range of 45-60 wt%. Moreover, after being treated under 50°C for 7 days or subjected to thermal-cycling test for 500 times, the micro-PCMs keep good thermal performances and stabilities. Besides, these micro-PCMs show good thermal stability, and the degradation temperature differs from the different compositions of the binary core and molecular weight of the water-soluble monomers.
authors.affiliation: Institute of Advanced Materials, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China; Key Laboratory of Advanced Materials, Department of Materials Science and Engineering, Tsinghua University, Haidian District, Beijing 100084, China.
authors.forename: Yanhong
authors.initials: Y
authors.lastname: Ma
authors.affiliation: Institute of Advanced Materials, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China.
authors.forename: Xiaodong
authors.initials: X
authors.lastname: Chu
authors.affiliation: Institute of Advanced Materials, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China; Key Laboratory of Advanced Materials, Department of Materials Science and Engineering, Tsinghua University, Haidian District, Beijing 100084, China.
authors.forename: Guoyi
authors.initials: G
authors.lastname: Tang
authors.affiliation: Institute of Advanced Materials, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China; Key Laboratory of Advanced Materials, Department of Materials Science and Engineering, Tsinghua University, Haidian District, Beijing 100084, China. Electronic address: yaoyw@mail.tsinghua.edu.cn.
authors.forename: Youwei
authors.initials: Y
authors.lastname: Yao
mesh_terms: D015394:Molecular Structure; D010316:Particle Size; D058105:Polymerization; D011108:Polymers / Q000737:chemistry*; D011140:Polyurethanes / Q000737:chemistry*; D013499:Surface Properties
chemical_list: D011108:Polymers; D011140:Polyurethanes; C045786:polyurea