Shape‐Stabilized PCMs@Foam‐Based Porous Polymers for Thermal Energy Storage

Abstract

Hyper-crosslinked polymers (HCPs) have drawn much attention due to their high surface areas, low skeleton density, thermal stability and chemical durability. Foam-based hyper-crosslinked polymers (HCfoam-1 and HCfoam-2) were synthesized by Friedel-Crafts alkylation reaction and Scholl Coupling reaction. HCfoam-1 and HCfoam-2 exhibit high specific surface area (1098 m 2 g À 1 and 1078 m 2 g À 1 ) and permanent porosity. They both show well thermal stability. By using them as supporting materials, shape-stabilized phase change materials (PCMs) composites were prepared. The composites show favorable encapsulation rate and phase enthalpies. For palmitic acid@-HCfoam-1 (PA@HCfoam-1), its encapsulation rate reaches up to 77.6 wt%, the melting latent heat is 150.6 kJ Kg À 1 . In addition, PCMs@HCfoams still remain stable without leakage above the melting point. All these indicate that the materials have broad prospects in thermal energy storage application.[a] Z.

Introduction of Phase Change Material into Sustainable Carbon Materials for Enhanced Shape Stability and Thermal Conductivity

“…The composites achieved a considerably high latent heat of 150.6 J g −1 with no leakage out. However, the thermal conductivity of the composites was not reported . In the past few years, porous carbon materials, including carbon nanotubes aerogel, graphene aerogel, carbon foam, and biomass‐derived porous carbon materials, were applied to comprehensively modifying the thermal conductivity together with preventing the leakage.…”

Recent Advances in Polymer‐Containing Multifunctional Phase‐Change Materials

“…Herein, for the first time, we summarized the advanced applications of polymers in multifunctional SSPCMs, such as shape memory, hydrophobicity, and wearable devices. This review aims to gain an in‐depth understanding of polymers as supporting materials to encapsulate PCMs, and at the same time endow PCMs with more intelligent applications [65–68] . We hope that the in‐depth study of polymers and multifunctional SSPCMs can provide better guidance for the design of multifunctional SSPCMs.…”