Polyethylene Glycol/Carbon Black Shape-Stable Phase Change Composites for Peak Load Regulating of Electric Power System and Corresponding Thermal Energy Storage

Abstract

In this work, a unique electrically conductive polyethylene glycol (PEG)/carbon black (CB) shape-stable phase change composite (SSPCC) for peak load regulating of electric power system was prepared via a vacuum impregnation approach. Scanning electron microscope (SEM), differential scanning calorimeter (DSC) and X-ray diffraction (XRD) were used to study the micro morphology, crystallization behavior, crystallization structure and thermal properties. Leakage test and DSC results showed that when the PEG content in PEG/CB SSPCC was as high as 86 wt%, the phase change enthalpy and relative enthalpy efficiency were up to 147.7 J/g and 95.1%, respectively. Fourier transform infrared (FTIR) and XRD showed no chemical reaction between CB and PEG. Thermal cycling test showed that the PEG/CB SSPCC had excellent thermal stability and thermal reliability. Moreover, the good electro-tothermal conversion ability of PEG/CB SSPCC (0.2 S/m) provided rich possibilities for peak load regulating of electric power system and corresponding thermal energy storage.

Study of crystallization behaviour of electron beam irradiated polypropylene and high-density polyethylene

“…Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited. [1][2][3]. The molecular structure of polymers and consequently their properties can be significantly modified by electron beam irradiation.…”

“…Polypropylene (PP) and polyethylene (PE) are the most widely used polymer materials in pure form but also modified in various ways [ 1 – 3 ]. The molecular structure of polymers and consequently their properties can be significantly modified by electron beam irradiation.…”

Paraffin/methyl stearate/multi‐walled carbon nanotubes composite phase change materials with wide service temperature and high latent heat

“…Among them, the utilization of porous materials like carbon nanotubes (CNTs), carbon black (CB), graphite, diatomite, and perlite to prepare FSPCMs is one of the most important methods. [19][20][21][22][23] The two major aims of FSPCMs are to achieve a high enthalpy value at a certain T pc and a considerable enthalpy value in a wide T pc range relative to a certain T pc . There are few related studies for the latter at present, but a wide T pc range is of great significance for practical application.…”

Upcycling by grafting onto semi‐crystalline polymers using supercritical CO2

“…16,17 Rapid monomer transport is also facilitated as supercritical CO 2 exhibits the density of a liquid and the diffusivity of a gas. 18 Therefore, one can imagine exploiting these transport properties to create many unique materials, including multi-phase materials [19][20][21][22] as well as composites containing additives. [23][24][25][26][27] Additionally, in contrast to many organic solvents, supercritical CO 2 is inexpensive, nontoxic, non-flammable, and environmentally benign when fully recovered in processing.…”