Form‐stable phase‐change materials supported by 1‐octadecylamine‐modified montmorillonite for latent heat storage

Abstract

Form-stable phase-change materials (FSPCMs) are of great significance for relieving the contradiction of energy supply and demand. Unfortunately, the practical application of FSPCMs is severely compromised by their intrinsic drawbacks including lower latent heat storage (LHS) capacities, inferior interfacial compatibility, and cycling durability. Herein, we have provided a group of novel FSPCMs with higher LHS capacities, using paraffin as the LHS materials, which tightly intertwines with the 1-octadecylamine-modified montmorillonite (C18-MMT) under the capillary action as well as induced dipole force due to its n-alkyl chains compatibility. The obtained composite FSPCMs not only exhibit high melting enthalpies (137.56 J/g) but also demonstrate enhanced shape stability and thermal stability. In addition, the composites also render an impressive long-term thermal cycling capability and structure stability even after 100 thermal cycling durability tests, which are believed to have great potential for application in the thermal management of green energysaving buildings.

Anisotropic Rotunda‐Shaped Carboxymethylcellulose/Carbon Nanotube Aerogels Supported Phase Change Materials for Efficient Solar‐Thermal Energy Conversion

“…Shi et al constructed a graphene-based stereotyped CPCM by in-situ filling polyethylene glycol (PEG) into a graphene oxide network hydrogel through a simple and direct one-step strategy. [16] The material has a high loading of PCM and can maintain a stable phase change enthalpy after 100 cooling and heating cycles, showing excellent phase change heat storage capacity. With a conversion efficiency of 93.7 %, the material also has outstanding solar-thermal energy conversion capabilities, allowing it to quickly transform solar energy into thermal energy and store it in the PCMs.…”

“…Shi et al. constructed a graphene‐based stereotyped CPCM by in‐situ filling polyethylene glycol (PEG) into a graphene oxide network hydrogel through a simple and direct one‐step strategy [16] . The material has a high loading of PCM and can maintain a stable phase change enthalpy after 100 cooling and heating cycles, showing excellent phase change heat storage capacity.…”