Heat storage and conductive properties of the polypyrrole aerogel-based new shape-stabilized phase change composite

Abstract

The development of materials or devices for the storage of sustainable thermal energy is of great significance in alleviating the energy crisis. In this paper, polypyrrole (PPy) aerogels was prepared through the induction of ionic surfactant-oleic acid. Then, it was taken as the carrier material of paraffin to form a new shape-stabilized phase change material(PCM). The morphology, functional groups and pore structure of the samples were measured by SEM, FTIR and BET, respectively. The heat storage and thermal cycling performance were characterized by DSC. The light thermal properties were recorded through a multi-channel temperature recorder under a simulated light source, and the conductive properties were tested using a resistivity tester. The relationship between the adsorption rate to paraffin and the molar ratio of different pyrroles to surfactants was explored. The addition of oleic acid gave PPy aerogel the best adsorption rate to paraffin. When the molar ratio of pyrrole monomer to oleic acid was 7:1, the maximum adsorption rate of PPy aerogel was 59.81 %, which was 117.39 % of the adsorption rate of polypyrrole aerogel without surfactant. And when the mass fraction of paraffin was 55 %, the resistivity of PPy aerogel shape-stabilized PCM was about 40 Ω·cm which met the requirements of resistivity of conductive materials. The prepared shape-stabilized PCM has the application prospect in the field of energy-saving and antistatic, and achieving clean production.