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Guangjian Peng,Yahao Hua,Guijing Dou,Yiheng Sun,Yong Huan,Sung Hoon Kang,Zhongyu Piao 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.110 No.-
Microencapsulated phase change materials (MPCMs) are often mixed with matrix materials to formphase change composites for energy storage. Typically, MPCMs are easily debonded from the matrix orruptured, thereby weakening the mechanical properties of composites. This paper aims to simultaneouslyimprove the rupture strength of microcapsules and the bonding strength between microcapsulesand matrix to enhance the mechanical properties of composites. The titanium dioxide (TiO2) nanoparticlesmodified by a silane coupling agent (KH560) were doped into the melamine formaldehyde (MF) shell,forming n-octadecane@MF/TiO2 hybrid shell MPCMs (HS-MPCMs). The doping of modified TiO2 nanoparticlesreduced supercooling and improved the thermal stability of microcapsules. Compared with MFmicrocapsules, the rupture strength of HS-MPCMs was increased by an average of 30.4%. The modifiedTiO2 nanoparticles also built covalent bonds between microcapsule shell and matrix, which led to bettermicrocapsule/epoxy interface bonding. Thus, the HS-MPCMs/epoxy composites performed higher tensilestrength than the unmodified composites. Specifically, the tensile strength of composites was improvedby an average of 17.2% at the microcapsule content of 10 wt.% with the aid of the MF/TiO2 hybrid shell. The reinforced MPCMs/epoxy composites are expected to be used as anti-icing coatings in the aerospacefield.
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