Direct impregnation and characterization of Colemanite/Ulexite-Mg(OH)2 paraffin based form-stable phase change composites

Horpan, M.S.; Şahan, Nurten; Paksoy, Halime; Sivrikaya, Osman; Güneş, Mustafa

doi:10.1016/j.solmat.2019.03.018

Cited by 9 publications

(4 citation statements)

References 23 publications

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“…Hence, RT-FTIR spectroscopy is often combined with other techniques in so-called combined techniques, i.e. , rheological measurements, 100–102 dielectric analysis (DEA), 103–106 fluorescence spectroscopy, 107–110 photocalorimetry (DSC), 111–113 thermogravimetry (TGA) and others. 114–117…”

Section: Quantitative Methods For Monitoring Photopolymerization Reac...mentioning

confidence: 99%

“…[95][96][97][98][99] Therefore, this method is only applicable to thin films, so when using RT-FTIR, it is not possible to obtain information, e.g., about the kinetics of rheological changes in the composition, changes in volume due to the expansion or contraction of the polymer network or changes in crosslinking density along with the sample thickness profile. Hence, RT-FTIR spectroscopy is often combined with other techniques in so-called combined techniques, i.e., rheological measurements, [100][101][102] dielectric analysis (DEA), [103][104][105][106] fluorescence spectroscopy, [107][108][109][110] photocalorimetry (DSC), [111][112][113] thermogravimetry (TGA) and others. [114][115][116][117] ATR-FTIR (attenuated total reflectance Fourier-transform infrared) spectroscopy has also been utilized to successfully examine the conversion of the reaction and composition during polymerization monitoring.…”

Section: Fourier-transform Real-time Infrared Spectroscopy (Rt-ftir)mentioning

confidence: 99%

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Review of quantitative and qualitative methods for monitoring photopolymerization reactions

et al. 2023

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Section: Quantitative Methods For Monitoring Photopolymerization Reac...mentioning

confidence: 99%

Section: Fourier-transform Real-time Infrared Spectroscopy (Rt-ftir)mentioning

confidence: 99%

Review of quantitative and qualitative methods for monitoring photopolymerization reactions

et al. 2023

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“…Though many salt hydrates (inorganic PCMs) were explored as suitable building materials, organic PCMs are preferred over inorganic PCMs due to behavioral irregularities with salt hydrates, i.e., phase separation, supercooling, and cyclic instability . Different organic PCMs, e.g., paraffin, fatty acids, esters, and alcohols, were also reported in building applications. − The leakage/contamination with the surroundings issue of PCMs once melted was resolved by forming EP-based composites. Additionally, the composite rendered form stability with the PCM, and mechanical properties of cement could be improved through its application in concrete. − Fatty acid-based EP composites were also reported as thermal energy storage materials, , but the performance of fatty ester-based composites and its application in the building have not been explored enough.…”

Section: Introductionmentioning

confidence: 99%

Thermal Buffering Performance of a Propyl Palmitate/Expanded Perlite-Based Form-Stable Composite: Experiment and Numerical Modeling in a Building Model

et al. 2021

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A phase change material (PCM) composite was prepared by impregnating propyl palmitate in expanded perlite (EP, as a support matrix), and its thermal buffering performance was tested in building applications. Five composites with varying PCM contents, i.e., 60, 55, 50, 45, and 40%, were prepared, and the composite with 55 wt % (EP-55) was chosen for thermal buffering performance analysis. All composite samples showed melting between 18.5 and 18.8 °C (as a PCM), while attenuated total reflection-infrared spectroscopy analysis confirmed simple physical adsorption occurring between the PCM and EP. Differential scanning calorimetry measurements (EP-55) showed a phase change enthalpy of 81.98 ± 1 J g −1 , and stable performance during 1000 thermal cycles with the EP-55 composite confirmed appreciable thermal stability and reliability. The thermal buffering performance of the composite was tested in a building model, which was simulated using COMSOL Multiphysics 5.5. The unsteadystate energy (conduction/convection/radiation and latent heat of a PCM) transport from a source to the building was expressed mathematically along with its boundary conditions. The model was validated using a blank and with a composite, which was later applied to predict another unknown case. The model-predicted temperatures could very closely match (< ±4.0%) with experimental values.

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“…The SSPCMs consist of a substrate and a PCM. When the phase change occurs, the substrate can protect the PCM from leaking and maintain the overall solid shape without causing macroscopic flow . In addition, the substrate can improve the thermal conductivity and enhance the mechanical properties of SSPCMs.…”

Section: Introductionmentioning

confidence: 99%

Novel Shape-Stabilized Phase Change Materials Based on Paraffin/EPDM@Graphene with High Thermal Conductivity and Low Leakage Rate

Ding

et al. 2020

Energy Fuels

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The negatively charged phase change latex (PCL) was obtained by simultaneously emulsifying paraffin and ethylene propylene diene monomer (EPDM) into water. Graphene (GE) was positively modified using cetyltrimethylammonium bromide and was then introduced into the PCL. Because of electrostatic attraction, the positively charged graphene was tightly bonded with the negatively charged PCL particles. Paraffin/EPDM@graphene thermally conductive and shape-stabilized phase change materials (TSPCMs) were obtained by hot press vulcanization. The thermal conductivity of TSPCMs was up to 1.451 W·m–1·K–1, with an increase of 294% compared to that without graphene. The error between the actual enthalpy and the theoretical value of TSPCMs was −1.00%, and the leakage rate was only 0.621% after being heated for 48 h. Because of the combination of EPDM and GE, the prepared TSPCM exhibits excellent comprehensive performance, so it has great application potential in the field of thermal energy storage and thermal management of electronic devices.

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Direct impregnation and characterization of Colemanite/Ulexite-Mg(OH)2 paraffin based form-stable phase change composites

Cited by 9 publications

References 23 publications

Review of quantitative and qualitative methods for monitoring photopolymerization reactions

Review of quantitative and qualitative methods for monitoring photopolymerization reactions

Thermal Buffering Performance of a Propyl Palmitate/Expanded Perlite-Based Form-Stable Composite: Experiment and Numerical Modeling in a Building Model

Novel Shape-Stabilized Phase Change Materials Based on Paraffin/EPDM@Graphene with High Thermal Conductivity and Low Leakage Rate

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