Citation: WU Wen-Hao, HUANG Xin-Yu, YAO Rui-Min, CHEN Ren-Jie, LI Kai, ZOU Ru-Qiang. Synthesis and Properties of Polyurethane/Coal-Derived Carbon Foam Phase Change Composites for Thermal Energy Storage[J]. Acta Physico-Chimica Sinica, ;2017, 33(1): 255-261. doi: 10.3866/PKU.WHXB201610181 shu

Synthesis and Properties of Polyurethane/Coal-Derived Carbon Foam Phase Change Composites for Thermal Energy Storage

1.
Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing 100871, P. R. China;
2.
Research Institute of Chemical Defence, Beijing 100191, P. R. China

Received Date: 27 July 2016
Revised Date: 18 October 2016

Fund Project: The project was supported by the National Natural Science Foundation of China (51322205, 21371014) and Specialized Research Fund of Beijing Municipal Science & Technology Commission, China (Z15111000090000, Z151100000915074).

In this article, we used coal-derived carbon foam (CCF) as a skeleton material to encapsulate the solid-to-solid phase change material polyurethane (PU) to provide PU@CCF composites for functional applications. The obtained PU@CCF composites were characterized by field-emission scanning electron microscopy (SEM), transmission electron microscopy (TEM), powder X-ray diffraction (PXRD), Fourier transform infrared (FT-IR) spectroscopy, thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), and thermal conductivity measurements. The results illustrated that the most preferred ratio of polyethylene glycol (PEG-6000) to hexamethylene diisocyanate (HDI) to synthesize PU was 1:2 and the CCF skeleton prevented PU leakage during the phase change process. Compared with PEG-6000, the thermal conductivity of the PU@CCF composite was raised by 54%, its cycle thermal stability was remarkable after 2000 cycles, and its supercooling degree was lowered by more than 10℃. For electro-to-heat energy conversion, the phase transition behavior of the obtained PU@CCF could be induced under an electron voltage as low as 0.8 V with 75% conversion efficiency at 1.1 V. This functional phase change composite realizes electric-heat conversion under the lowest loading voltage reported to date, providing an important benchmark for the preparation and functionalization of low-cost phase change composites.
- Phase change material,
- Thermal energy storage,
- Thermal conductivity,
- Carbon foam,
- Electro-to-heat energy conversion
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沈阳化工大学材料科学与工程学院沈阳 110142