The Effect of Hydroxylated Multi-Walled Carbon Nanotubes on the Properties of Peg-Cacl2 Form-Stable Phase Change Materials

Zheng, Lingyu; Zhang, Xuelai; Wu, Haoting; Wu, Xinfeng; Mao, Fa

doi:10.3390/en14051403

Cited by 11 publications

(5 citation statements)

References 81 publications

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“…In order to produce a new type of energy storage material by Zheng et al, hydroxylated multi-walled carbon nanotubes (MWCNTs) of different mass were incorporated into the PEG1500•CaCl2 form-stable phase change material. They present ideas to the literature for the preparation and application of form-stable phase change materials with high thermal conductivity [52]. We observed that the phase change and thermal conductivity values of the PS-PEG copolymers we synthesized in this study were as high as in these studies.…”

Section: Thermal Conductivitymentioning

confidence: 54%

Thermal Conductivity and Phase Change Properties of Boron Nitride-Lead Oxide Nanoparticles doped Polymer Nanocomposites

Cinan

Baskan

Erol

et al. 2022

Preprint

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The thermally conductive phase change materials (PCMs) were produced using the crosslinked Poly (Styrene-block-Ethylene Glycol Di Methyl Methacrylate) (PS-PEG DM) copolymer by employing the boron nitride (BN)/lead oxide (PbO) nanoparticles. DSC and TGA methods were used to research the phase transition temperatures (melting and crystallization temperatures: Tm and Tc), the phase change enthalpies (melting and crystallization enthalpies: ∆Hm and ∆Hc). The thermal conductivities (λ) of the PS-PEG/BN/PbO PCM nanocomposites were investigated. The ∆Hm and λ value of PS-PEG/BN/PbO PCM nanocomposite containing BN 13 wt%, PbO 60.90 wt%, and PS-PEG 26.10 wt% was determined to be 27.6 Jg− 1 and 18.874 W/(mK). From DSC measurements, Tm and Tc of PS-PEG PCM nanocomposites were found to vary between 57.8°C-205°C, 4.7°C-188.6°C, respectively. The crystallization fraction (Fc) values of PS-PEG (1000) and PS-PEG (1500) copolymers are 0.032–0.034; 0.063, respectively. XRD results of the polymers, the PCM nanocomposites showed that the sharp diffraction peaks at 17.00° and 25.28° of PS-PEG copolymer belonged to the PEG part. When nanoparticles were added to the polymers, SEM and TEM images confirmed that the PCM nanocomposites have a grain, spherical shape, and homogeneous distribution of the nanoparticles. Since these new nanocomposites, whose successful results we have presented as radiation shields in another study, show remarkable thermal conductivity performance, they can be used as conductive polymer nanocomposites for effective heat dissipation in heat exchangers, power electronics, electric motors, generators, communication, and lighting equipment. At the same time, according to our results, PCM nanocomposites can be considered as heat storage materials in the energy storage system.

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Section: Thermal Conductivitymentioning

confidence: 54%

Thermal Conductivity and Phase Change Properties of Boron Nitride-Lead Oxide Nanoparticles doped Polymer Nanocomposites

Cinan

Baskan

Erol

et al. 2022

Preprint

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“…However, PEG-CaCl 2 /CCF PCMs have no obvious leakage and their shapes remain intact, which is mainly attributed to the complex cross-linking network structure of PEG and CaCl 2 and the network structure adsorption and network barrier of CCF. (1) PEG reacts with CaCl 2 to form the cross-linking structure . At this time, PEG is equivalent to forming a large three-dimensional network structure, and almost all PEG molecules become a part of this network; that is, PEG is forbidden in the macromolecular structure of PEG-CaCl 2 , thus ensuring the shape stability of PCMs.…”

Section: Resultsmentioning

confidence: 99%

Polyethylene Glycol–Calcium Chloride Phase Change Materials with High Thermal Conductivity and Excellent Shape Stability by Introducing Three-Dimensional Carbon/Carbon Fiber Felt

Shi

Wang

et al. 2021

ACS Omega

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The low thermal conductivity and poor shape stability of phase change materials (PCMs) have seriously restricted their applications in energy storage and energy saving. In this paper, poly(ethylene glycol)–calcium chloride/carbon/carbon fiber felt (PEG-CaCl2/CCF) PCMs were fabricated by a liquid-phase impregnation–vacuum drying–hot compression molding method with carbon/carbon fiber felt as the three-dimensional (3D) thermal skeleton and PEG-CaCl2 as the polymer PCM matrix. PCMs were heated and compressed by the compression confinement method to improve the contact area between 3D skeleton carbon fibers. The carbon fibers in PCMs presented a 3D (X–Y–Z) network structure and the fiber arrangement was anisotropic, which were beneficial to improve the thermal conductivity of PCMs in the fiber direction. The compression confinement can improve the contact area between the fibers in the 3D skeleton. As a result, the thermal conductivity of PEG-CaCl2/CCF PCMs can reach 3.35 W/(m K) (in-plane) and 1.94 W/(m K) (through-plane), about 985 and 571% of that of PEG-CaCl2, respectively. Due to the complexation of PEG and CaCl2 and the 3D skeleton support of carbon fiber felt, PCMs have excellent shape stability. The paper may provide some suggestions for the preparation of high thermal conductivity and excellent shape stability PCMs.

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“…Phase change materials (PCMs) are innovative materials that efficiently absorb and release a significant amount of energy during phase transformation, serving for temperature regulation and energy storage 29–31 . Polyethylene glycol (PEG) is a well‐known kind of PCMs, which emerges as a highly promising solid–liquid PCM due to its exceptional qualities, such as low vapor pressure, excellent chemical and thermal stability, appropriate phase transition temperature, lack of supercooling, and nontoxic nature 32–34 . PEG also exhibits some drawbacks which would limits its practical applications.…”

Section: Introductionmentioning

confidence: 99%

“…[29][30][31] Polyethylene glycol (PEG) is a well-known kind of PCMs, which emerges as a highly promising solid-liquid PCM due to its exceptional qualities, such as low vapor pressure, excellent chemical and thermal stability, appropriate phase transition temperature, lack of supercooling, and nontoxic nature. [32][33][34] PEG also exhibits some drawbacks which would limits its practical applications. The thermal conductivity of PEG leads to reduced heat transfer efficiency, prolonged heat absorption and release time for PCM, and diminished the corresponding energy storage efficiency.…”

Section: Introductionmentioning

confidence: 99%

Preparation of a thermally conductive phase‐change coating with good anti‐corrosion

Hu,

Li,

et al. 2023

Polymer Composites

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Polyethylene glycol (PEG) is a widely available and environmentally friendly phase change material known for its high energy storage capacity. However, its application in various industries is limited due to slow heat absorption and release, poor mechanical properties, and inadequate weather resistance. PEG was blended with waterborne epoxy resin (WER) to improve its mechanical properties and weather resistance. Furthermore, graphene nanoplatelets (GNPs) and boron nitride (BN) were incorporated into the WER/PEG resin substrate to prepare WER/PEG/BN@GNP coatings, resulting in enhanced thermal conductivity. When the GNP content was 0.5 wt%, the WER/PEG/BN@GNP coatings performed excellent anti‐corrosion. Otherwise, the leakage of PEG under heat‐cool cycling was addressed by the preparation of WER/PEG/BN@GNP coatings, as well as the low rates of heat absorption and release. In this work, the preparation method successfully combines the phase‐change characteristics of PEG, the outstanding mechanical properties of WER, and the high thermal conductivity of BN and GNP. The WER/PEG/BN@GNP coatings present significant potential for practical applications.Highlights A new coating is prepared by incorporation of BN/GNP into PEG/WER matrix. The prepared coating performs phase change and good heat conduction efficiency. The phase‐transition leakage of PEG is resolved by the combination with WER. The synergy of BN and GNP fillers can enhance thermal conductivity effectively. The prepared coating exhibits insulation and anti‐corrosion at low GNP content.

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The Effect of Hydroxylated Multi-Walled Carbon Nanotubes on the Properties of Peg-Cacl2 Form-Stable Phase Change Materials

Cited by 11 publications

References 81 publications

Thermal Conductivity and Phase Change Properties of Boron Nitride-Lead Oxide Nanoparticles doped Polymer Nanocomposites

Thermal Conductivity and Phase Change Properties of Boron Nitride-Lead Oxide Nanoparticles doped Polymer Nanocomposites

Polyethylene Glycol–Calcium Chloride Phase Change Materials with High Thermal Conductivity and Excellent Shape Stability by Introducing Three-Dimensional Carbon/Carbon Fiber Felt

Preparation of a thermally conductive phase‐change coating with good anti‐corrosion

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