Form‐Stabilized Polyethylene Glycol/Palygorskite Composite Phase Change Material: Thermal Energy Storage Properties, Cycling Stability, and Thermal Durability

Abstract

In this work, polyethylene glycol (PEG) as a phase change material (PCM) was incorporated with palygorskite (Pal) clay to develop a novel form‐stable composite PCM (F‐SCPCM). The Pal/PEG(40 wt%) composite was defined as F‐SCPCM and characterized using SEM/EDS, FT‐IR, XRD, DSC, and TGA techniques. The DSC results revealed that the F‐SCPCM has a melting temperature of 32.5°C and latent heat capacity of 64.3 J/g for thermal energy storage (TES) applications. Thermal cycling test showed that the F‐SCPCM had good cycling thermal/chemical stability after 500 cycles. The TGA data proved that that both cycled and non‐cycled F‐SCPCMs had considerable high thermal durability. Consequently, the created F‐SCPCM could be considered as an additive material for production of green construction components with TES capability. POLYM. ENG. SCI., 60:909–916, 2020. © 2020 Society of Plastics Engineers

Fly Ash/Octadecane Shape-Stabilized Composite PCMs Doped with Carbon-Based Nanoadditives for Thermal Regulation Applications

“…6,7 The first problem can be overcome via shape stabilization of PCMs. In this context, several porous supporter materials have been handled for easy and cheap production of shape-stable composites, some of which are attapulgite, 8,9 diatomite, 10−12 natural clay, 13 perlite, 14−16 silica fume, 17,18 vermiculite, 19−22 and bentonite. 23,24 On the other hand, fly ash (FA) composed of mainly silica and alumina is a good candidate for the production of shape-stabilized composite PCMs (SSC-PCMs) as a lightweight supporter porous material.…”

“…are the pioneer materials because of some of their superior properties such as high LHTES properties, cycling stability, nontoxicity, negligible super cooling, and low vapour pressure. − Still, the leakage issue which emerged throughout the solid–liquid phase transition and low thermal conductivity are the most important deficiencies that restrict their usage in passive solar TES activites. , The first problem can be overcome via shape stabilization of PCMs. In this context, several porous supporter materials have been handled for easy and cheap production of shape-stable composites, some of which are attapulgite, , diatomite, − natural clay, perlite, − silica fume, , vermiculite, − and bentonite. , On the other hand, fly ash (FA) composed of mainly silica and alumina is a good candidate for the production of shape-stabilized composite PCMs (SSC-PCMs) as a lightweight supporter porous material. FA is a byproduct obtained from coal-fired power generation plants and its treatment and comprehensive utilization has been one of the hot social topics among researchers.…”

Preparation and characterization of polyethylene glycol/polyurea composites for shape stabilized phase change materials

“…[30,31] A variety of ssPCMs using PEG as phase change ingredient have been reported. Sarı et al reported a series of PEG based ssPCMs using different inorganic materials (gypsum and natural clay, [32] diatomite/CNTs, [33] and palygorskite [34] ) as supports, and the heat storage density of the ssPCMs is in the range of 24.18-64.3 J/g. PEG based ssPCMs with higher latent heat were obtained using polymers as supporting materials for encapsulating PEG.…”

Preparation, thermal, and mechanical properties of polyethylene glycol/expoxy resin composites as form‐stable phase change materials

“…Form‐stable PCMs composed of working media and skeletal substances can effectively prevent the leakage, which can maintain the solid state even if the phase of the working media turned from solid to liquid at the temperature higher than the melting temperature of working media. Various supporting matrix, including inorganic porous materials such as expanded graphite (EG), [ 31–33 ] activated carbon (AC), [ 34,35 ] mineral, [ 36–39 ] and polymers, [ 40–44 ] have been used as form‐stabilization substances. Compared with inorganic porous matrix, the polymers have relative higher mechanical strength and toughness.…”