Study on the phase change thermal storage performance of palmitic acid/carbon nanotubes composites

Xiao, Da; Qu, Yuanyuan; Hu, Shuchun; Han, Hongchuan; Li, Yanbin; Zhai, Jing; Jiang, Yanman; Yang, Haoyue

doi:10.1016/j.compositesa.2015.06.020

Cited by 35 publications

(9 citation statements)

References 24 publications

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“…On the other hand, the measured TC values of FA/CNTs- g -FA and FA/CNTs composites were compared with those of some PCMs doped with different kind of carbon based-fillers in Table 6 . As seen from the tabulated data, the CPCM prepared in this work had much superior thermal properties than the previously reported similar PCMs 14 , 20 , 22 , 26 , 34 – 36 .…”

Section: Resultssupporting

confidence: 47%

“…As seen from these data, especially the LHC values of the composites including CNTs- g -FA (grafting ratio: 1:3) were 6.5–8.9% higher than that of the composites including CNTs due to the LHC contribution of the CNTs-g-FA additive. On the other hand, when compared the LHC of the FA/CNTs- g -FA composite PCMs with those of different kinds of organic PCMs doped with carbon based fillers 14 – 20 , 22 , 26 , 29 , 36 , it was observed that the FA/CNTs-g-FA composite PCMs prepared in this work had relatively higher LHC than most of them. This boosted in the LHC value of the FA/CNTs-FA composite PCMs was due to the fact that the CNTs- g -FA used as doping agents had LHC of in the range of 25–93 J g −1 .…”

Section: Resultsmentioning

confidence: 73%

“…Ji et al 19 used acid treated CNTs and pyrogallo absorbed CNTs to prepare composite PCMs with PA, and observed similar trend, the thermal conductivity increases with the increasing amount of the filers. Xiao et al 20 dispersed CNTs, oxidized CNTs and grafted CNTs into PA at a mass ratio of 1:100. The LHC of PA/G-CNTs were found to be exceeded that of pure PA and showed a higher TC.…”

Section: Introductionmentioning

confidence: 99%

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Thermal energy storage and thermal conductivity properties of fatty acid/fatty acid-grafted-CNTs and fatty acid/CNTs as novel composite phase change materials

Al‐Ahmed

Sarı

Mazumder

et al. 2020

Sci Rep

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In recent year, fatty acids (FAs) are heavily studied for heat storage applications and they have shown promising advantages over other organic phase change materials (PCMs). Among the FAs; capric, palmitic and stearic acids are the most studied PCMs. Several researchers have investigated these FAs and tried to improve their thermal properties, mainly by adding different high conducting fillers, such as graphite, metal foams, CNTs, graphene etc. In most cases, these fillers improved the thermal conductivity and heat transfer property but reduce the heat storage capacity considerably. These composites also lose the mixing uniformity during the charging and discharging process. To overcome these issues, selected FAs were grafted on the functionalized CNT surfaces and used as conductive fillers to prepare FA based composite PCMs. This process significantly contributed to prevent the drastic reduction of the overall heat storage capacity and also showed better dispersion in both solid and liquid state. Thermal cycling test showed the variations in the thermal energy storage values of all composite PCMs, however, within the tolerable grade and they had appreciable phase change stability and good chemical stability even after 2,000 cycles.

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Section: Resultssupporting

confidence: 47%

Section: Resultsmentioning

confidence: 73%

Section: Introductionmentioning

confidence: 99%

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Thermal energy storage and thermal conductivity properties of fatty acid/fatty acid-grafted-CNTs and fatty acid/CNTs as novel composite phase change materials

Al‐Ahmed

Sarı

Mazumder

et al. 2020

Sci Rep

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“…53 PA/OCNTs g 0.29899Xiao, et al . 53 PA/EG h 0.6080Sari, et al . 54 PA/PB-40.392660Present study a carbon nanotube; b capric-myristic acid; c poly-methyl methacrylate; d capric-stearic acid; e white carbon black; f polyaniline; g oxidized carbon nanotubes; h expanded graphite.…”

Section: Resultsmentioning

confidence: 99%

A promising form-stable phase change material prepared using cost effective pinecone biochar as the matrix of palmitic acid for thermal energy storage

Wan

Chen

Cui

et al. 2019

Sci Rep

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A promising new form-stable phase change material (PA/PB) was fabricated using pinecone biochar (PB) as the supporting material of palmitic acid (PA). The biochar of PB with large surface area was produced by forest residue of pinecone, and it was cheap, environment friendly and easy to prepare. The PB was firstly utilized as the supporter of PA and the characterizations of PA/PB were analyzed by the BET, SEM, XRD, DSC, TGA, FT-IR and thermal conductivity tester. The results demonstrated that the PA was physically absorbed by the PB and the crystal structure of the PA was not destroyed. The results of DSC showed that the fusing and crystallization points of the form-stable phase change material with the maximum content of PA (PA/PB-4) were 59.25 °C and 59.13 °C, and its fusing and freezing latent heat were 84.74 kJ/kg and 83.81 kJ/kg, respectively. The results of TGA suggested that the thermal stability of the PA/PB-4 composite was excellent, which could be used for the applications of thermal energy storage. Furthermore, the thermal conductivity of PA/PB-4 was 0.3926 W/(m∙K), which was increased by 43.76% compared with that of the pure PA. Thus, the study results indicated that the PA/PB-4 had great potential for thermal energy storage applications.

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“…In recent years, several research studies have been performed to examine the effects of applying PCMs on the performance of DASC systems [23]. Beside the heat storage capacity, the efficiency will be significantly improved if PCMs also possess the capability of absorbing solar irradiation and transferring it into thermal energy [24]. Wang et al [25] reported that the achieved working temperature of illuminated dispersion of graphite nanoparticle in paraffin/water emulsion ranges from room temperature to 80 °C.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Phase Change Microcapsules with the Enhanced Photothermal Performance

Latibari

Eversdijk²,

Cuypers

et al. 2019

Polymers

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The performance of solar-thermal conversion systems can be improved by incorporation of encapsulated phase change materials. In this study, for the first time, CrodathermTM 60 as a phase change material (PCM) was successfully encapsulated within polyurea as the shell supporting material. While preparing the slurry samples, graphite nanoplatelet (GNP) sheets were also incorporated to enhance the thermal and photothermal properties of the prepared materials. The morphology and chemical properties of these capsules were characterized by scanning electron microscopy (SEM) and Fourier transform infrared (FTIR) spectrum, respectively. The results show the spherical-like and core-shell structure of capsules with an average diameter size of 3.34 μm. No chemical interaction was observed between the core and the supporting materials. The thermal characteristics of the microencapsulated PCMs (MEPCMs), analyzed by differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA), indicate that the prepared samples with 0.1 weight percentage of GNP possess the latent heat of 95.5 J/g at the phase transition temperature of about 64 °C. Analyzing the rheological properties of the prepared slurry with 16 wt % of MEPCMs proves that the prepared material meet the requirements given by the heat transfer applications. The thermal storage capacity, good thermal stability, and improved photothermal performance of the prepared material make it a potential candidate for using in direct absorption solar thermal applications.

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Study on the phase change thermal storage performance of palmitic acid/carbon nanotubes composites

Cited by 35 publications

References 24 publications

Thermal energy storage and thermal conductivity properties of fatty acid/fatty acid-grafted-CNTs and fatty acid/CNTs as novel composite phase change materials

Thermal energy storage and thermal conductivity properties of fatty acid/fatty acid-grafted-CNTs and fatty acid/CNTs as novel composite phase change materials

A promising form-stable phase change material prepared using cost effective pinecone biochar as the matrix of palmitic acid for thermal energy storage

Preparation of Phase Change Microcapsules with the Enhanced Photothermal Performance

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