Adjustable thermal property of polyethylene glycol/diatomite shape‐stabilized composite phase change material

• DOI: 10.1002/pc.23243
• Publication Date: 2014-09-18T06:55:39Z
• Authors: Tingting Qian; Jinhong Li; Hongwen Ma; Jing Yang
• Keywords: Thermogravimetric analysis; Thermal Stability; Phase-change material

The work involves the fabrication, characterization, and thermal properties of polyethylene glycol (PEG)/diatomite powder (DP), which can be used as a novel shape‐stabilized composite phase change material (CPCM). maximum load PEG in DP reach 55% while melts during solid–liquid transformation. Differential scanning calorimeter results indicated that melting temperature new CPCMs could adjusted from 34 to 59°C solidifying 27 44°C. Corresponding latent heats processes were 77.27–106.5 J/g 72.07–94.93 J/g, respectively. Scanning electronic microscope, Fourier transform infrared spectroscopy, X‐ray diffraction was well dispersed diatomite pores no chemical changes took place cyclic test. Thermo‐gravimetric analysis had good stability reliability when immersed into at 75°C for 90 min. Thermal conductivity increased 0.36 0.71 W/mK after adding 10 wt% expanded graphite (EG). POLYM. COMPOS., 37:854–860, 2016. © 2014 Society Plastics Engineers