Thermal performance of PEG-MWCNTs composites as shape-stabilised phase change materials for thermal energy storage

Harmen, Yasser; Chhiti, Younes; Alaoui, Fatima Ezzahrae M’hamdi; Bentiss, Fouad; Jama, Charafeddine; Duquesne, Sophie; Bensitel, M.

doi:10.1080/1536383x.2021.1887146

Cited by 19 publications

(5 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The C-O stretching vibration peak at 1175 cm −1 for the -CH-O-group and the C-O stretching vibration peaks at 1130 cm −1 , 1085 cm −1 , and 1040 cm −1 also showed similar changes, but the positions of these peaks remained unchanged, indicating that the main chain structure of PLA remained unchanged before and after blending with PEG. These results confirmed that the prepared CPCMs exhibited non-covalent bonds [24], and the interaction forces between the two materials were manifested as physical forces [25], that is, molecular interactions or hydrogen bonding interactions.…”

Section: Ftir Analysissupporting

confidence: 71%

Preparation and Characterization of Bio-Based PLA/PEG/g-C3N4 Low-Temperature Composite Phase Change Energy Storage Materials

Ding

et al. 2023

Polymers

View full text Add to dashboard Cite

As energy and environmental issues become more prominent, people must find sustainable, green development paths. Bio-based polymeric phase change energy storage materials provide solutions to cope with these problems. Therefore, in this paper, a fully degradable polyethylene glycol (PEG20000)/polylactic acid (PLA)/g-C3N4 composite phase change energy storage material (CPCM) was obtained by confinement. The CPCM was characterized by FTIR and SEM for compatibility, XRD and nanoindentation for mechanical properties and DSC, LFA, and TG for thermal properties. The results showed that the CPCM was physical co-mingling; when PLA: PEG: g-C3N4 was 6:3:1, the consistency was good. PEG destroys the crystallization of PLA and causes the hardness to decrease. When PLA: PEG: g-C3N4 was 6: 3: 1, it had a maximum hardness of 0.137 GPa. The CPCM had a high latent enthalpy, and endothermic and exothermic enthalpies of 106.1 kJ/kg and 80.05 kJ/kg for the PLA: PEG: g-C3N4 of 3: 6: 1. The CPCM showed an increased thermal conductivity compared to PLA, reaching 0.30 W/(m·K),0.32 W/(m·K) when PLA: PEG: g-C3N4 was 6: 3: 1 and when PLA: PEG: g-C3N4 was 3: 6: 1, respectively. Additionally, the CPCM was stable within 250 °C, indicating a wide appliable temperature range. The CPCM can be applied to solar thermal power generation, transportation, and building construction.

show abstract

Section: Ftir Analysissupporting

confidence: 71%

Preparation and Characterization of Bio-Based PLA/PEG/g-C3N4 Low-Temperature Composite Phase Change Energy Storage Materials

Ding

et al. 2023

Polymers

View full text Add to dashboard Cite

show abstract

“…This finding for composite SSPCM containing MWCNTs is surprising because the concentration used (0.6 wt %) is definitely above the percolation threshold (see Figure ). Possibly, the dispersion of the carbon nanotubes was not good enough to realize the potential of the filler in TC enhancement, as many authors reported the enhancement of TC for 1 wt % CNT composite PCMs, which varied within a wide range ∼6–170%. ,,− Oppositely, a significant rise of TC was observed for SSPCM containing 3.0 wt % GnPs; the TC value was equal to 0.454 W/(m•K), which is ∼40% higher than the value obtained for unfilled SSPCM. Thus, the overall effect of TC enhancement caused by both gelation and incorporation of graphene nanoparticles reached 64.5%.…”

Section: Resultsmentioning

confidence: 97%

Phase Change Material with Gelation Imparting Shape Stability

et al. 2022

View full text Add to dashboard Cite

Blending two gelators with different chemistries (12-hydroxystearic acid and a bis-urea derivative, Millithix MT-800) was used to impart shape stability to CrodaTherm 29, a bio-based phase change material (PCM), melting/crystallizing at near-ambient temperature. The gelators immobilized the PCM by forming an interpenetrating fibrillar network. 15 wt % concentration of the gelators was found to be effective in preventing liquid PCM leakage. In order to improve the mechanical properties and thermal conductivity (TC) of the PCM, gelation of suspensions of multiwalled carbon nanotubes (MWCNTs) and graphene nanoplatelets (GnPs) in a molten material was done at concentrations exceeding their percolation thresholds. Compared to pristine PCM, the gelled PCM containing 3.0 wt % of GnPs demonstrated a shorter crystallization time, ∼1.5-fold increase in strength, improved stability, and ∼65% increase in TC. At the same time, PCM filled with up to 0.6 wt % of MWCNTs had diminished strength and increased leakage with a slight TC improvement. Gelation of PCM did not significantly alter its thermal behavior, but it did change its crystalline morphology. The developed shape-stable PCMs may have a wide range of applications in ambient temperature solar-thermal installations, for example, temperature-controlled greenhouses, net zero-energy buildings, and water heaters.

show abstract

“…In fact, global climate concerns and the exhaustion of fossil-based feedstocks for fuels and chemicals have driven the demand for viable alternatives to produce sustainable materials. [1][2][3][4][5] As the most accessible and recyclable carbon resource on Earth, lignocellulosic biomass is recognized as the key renewable material for an alternative and sustainable technology. [6][7][8] Increasingly, lignocellulosic materials are integrated into different technologies via several physicochemical conversions to produce a variety of sustainable and ecological materials in different fields.…”

Section: Introductionmentioning

confidence: 99%

Current approaches, emerging developments and functional prospects for lignin-based catalysts – a review

et al. 2023

View full text Add to dashboard Cite

show abstract

Thermal performance of PEG-MWCNTs composites as shape-stabilised phase change materials for thermal energy storage

Cited by 19 publications

References 32 publications

Preparation and Characterization of Bio-Based PLA/PEG/g-C3N4 Low-Temperature Composite Phase Change Energy Storage Materials

Preparation and Characterization of Bio-Based PLA/PEG/g-C3N4 Low-Temperature Composite Phase Change Energy Storage Materials

Phase Change Material with Gelation Imparting Shape Stability

Current approaches, emerging developments and functional prospects for lignin-based catalysts – a review

Contact Info

Product

Resources

About