Preparation of Stearic/Montmorillonite Composite as Form-Stable Phase Change Material

2013 ◽  
Vol 652-654 ◽  
pp. 131-134 ◽  
Author(s):  
Zhong Li ◽  
Ming Gong Chen ◽  
De Xin Tan ◽  
Jie Chen
Keyword(s):  
Phase Change ◽  
Phase Change Material ◽  
Xrd Analysis ◽  
Stable Phase ◽  
X Ray Diffraction ◽  
Scanning Calorimetry ◽  
Analysis Technique ◽  
New Type ◽  
Change Material ◽  
Good Heat

A new type of form-stable phase change material (PCM) with good heat storage was prepared by impregnation of stearic acid (SA) into the interlayer of modified montmorillonite (MMT). The structure, thermal properties of the composite PCM were determined by X-ray diffraction (XRD), Fourier transformation infrared (FTIR) and Differential Scanning Calorimetry (DSC) analysis technique. In the XRD analysis, expansions of the interlayer platelet spacing (001 diffraction peak) were observed in all samples, indicating that the impregnation of SA in the interlayer of MMT was successfully completed. The results of DSC indicated that the melting point and latent heat of the form-stable PCM is 63.2 °C and 118.6 J/g, respectively

Myristic Acid/Montmorillonite Composite as Shape Stabilized Phase Change Material for Thermal Energy Storage

2011 ◽  
Vol 332-334 ◽  
pp. 935-938
Author(s):  
Zhong Li ◽  
Shao Ming Yu ◽  
De Xin Tan ◽  
Tong He Yao
Keyword(s):  
Phase Change ◽  
Phase Change Material ◽  
Myristic Acid ◽  
Xrd Analysis ◽  
High Heat ◽  
X Ray Diffraction ◽  
Scanning Calorimetry ◽  
Analysis Technique ◽  
New Type ◽  
Change Material

A new type of shape stabilized phase change material (PCM) with good heat storage was produced by intercalating myristic acid (MA) with modifid montmorillonite (MMT). The structure, thermal properties of the composite PCM were determined by X-ray diffraction (XRD), Fourier transformation infrared (FTIR) and Differential Scanning Calorimetry (DSC) analysis technique. In the XRD analysis, expansions of the d spacings in the (001) plane were observed in all samples, indicating that the intercalation of MA in the interlayers of MMT was successfully achieved. The results of DSC indicated that the shape stabilized PCM displayed a high heat capacity (133.6 J.g-1)

scholarly journals Diffusion of Shape Stabilized PEG-SiO2 as a Driver for Producing Thermoregulating Facing Bricks

Materials ◽  
2021 ◽  
Vol 14 (6) ◽  
pp. 1395
Author(s):  
Angel Serrano ◽  
Ana M. Borreguero ◽  
Isabel Iglesias ◽  
Anselmo Acosta ◽  
Juan F. Rodríguez ◽  
...  
Keyword(s):  
Phase Change ◽  
Phase Change Material ◽  
Sol Gel ◽  
Effective Diffusion ◽  
Gelation Time ◽  
Stable Phase ◽  
Liquid Form ◽  
Indoor Temperature ◽  
Adsorption Capacities ◽  
Change Material

A novel form-stable phase-change material (PCM) based on facing bricks was developed by incorporating thermoregulating PEG-SiO2, synthetized by sol-gel method and based on polyethylene glycol as phase-change material and silica as stabilizer compound. The PEG-SiO2 in its liquid form (sol) is firstly adsorbed inside the porous brick and lastly stabilized (gel) by controlling its gelation time, obtaining form-stable PCMs with PEG-SiO2 contents within 15–110 wt.%. Kinetic adsorption curves of the sol into bricks having different porosities as well as maximum adsorption capacities were obtained. The effective diffusion coefficients (Deff) were estimated by means of Fick’s second law, it being possible to predict the adsorption of sol PEG-SiO2 by the brick as function of its porosity and the free diffusion coefficient. Finally, form-stable PCMs demonstrated an improvement in their thermal energy storage capacity (up to 338%), these materials being capable of buffering the indoor temperature during an entire operational day

scholarly journals Investigation of PEG/mixed metal oxides as a new form-stable phase change material for thermoregulation and improved UV ageing resistance of bitumen

RSC Advances ◽  
2020 ◽  
Vol 10 (73) ◽  
pp. 44903-44911
Author(s):  
Suhong Zhu ◽  
Tao Ji ◽  
Dongyu Niu ◽  
Zhengxian Yang
Keyword(s):  
Service Life ◽  
Phase Change ◽  
Metal Oxides ◽  
Phase Change Material ◽  
Extreme Temperature ◽  
Stable Phase ◽  
Mixed Metal Oxides ◽  
Uv Aging ◽  
New Form ◽  
Change Material

As a new performance-enhancing additive, PEG/MMO PCM is expected to be effective in regulating extreme temperature and resisting UV aging of bitumen binder and thus could significantly extend the service life of bitumen pavement.

Thermal Stability and Crystallization Behavior of PP/Organoclay Phase Change Composites

2013 ◽  
Vol 785-786 ◽  
pp. 123-126
Author(s):  
Ying Ye ◽  
Kun Yan Wang ◽  
Ge Chang ◽  
Qian Ying Jiang
Keyword(s):  
Thermal Stability ◽  
Phase Change ◽  
Crystallization Behavior ◽  
Melt Blending ◽  
X Ray Diffraction ◽  
Nucleation Agent ◽  
Scanning Calorimetry ◽  
Blending Method ◽  
Phase Change Composites ◽  
Change Material

Polypropylene/organoclay modified by dodecanol phase change material were prepared by melt blending method. The thermal stability and crystallization behavior was studied by thermogravimetry (TG), differential scanning calorimetry (DSC), and X-ray diffraction (XRD). TG results indicated the window of processing of PP could be improved by adding small amount organoclay modified by dodecanol to the blend. DSC showed the organoclay modified by dodecanol affected the crystallization behavior of PP as heterogeneous nucleation agent. XRD results show that the organoclay modified by dodecanol does not change the crystal structure in the blends but only decrease the intensity of the diffraction peak.

A polyethylene glycol-based form-stable phase change material supported by nanoarray-modified metal foam

2021 ◽  
pp. 103592
Author(s):  
Tongyan Ren ◽  
Guotong Du ◽  
Qiyu Li ◽  
Yuechuan Wang ◽  
Xiaowei Fu ◽  
...  
Keyword(s):  
Polyethylene Glycol ◽  
Phase Change ◽  
Phase Change Material ◽  
Metal Foam ◽  
Stable Phase ◽  
Change Material

Synthesis and Thermal Properties of Magnesium Sulfate Heptahydrate/Urea Resin as Thermal Energy Storage Micro-Encapsulated Phase Change Material

2017 ◽  
Vol 140 (1) ◽  
Author(s):  
Chenzhen Liu ◽  
Ling Ma ◽  
Zhonghao Rao ◽  
Yimin Li
Keyword(s):  
Particle Size ◽  
Thermal Properties ◽  
Phase Change ◽  
Magnesium Sulfate ◽  
Phase Change Material ◽  
Core Material ◽  
Scanning Calorimetry ◽  
Sulfate Heptahydrate ◽  
Encapsulated Phase Change Material ◽  
Change Material

In this study, micro-encapsulated phase change material (microPCM) was successfully synthesized by emulsion polymerization method, using magnesium sulfate heptahydrate (MSH) as core material and urea resin (UR) as shell material. The surface morphologies and particle size distributions of the microPCM were tested by scanning electron microscopy (SEM) and laser particle size analyzer. The chemical structure of microPCM was analyzed by Fourier-transform infrared spectroscopy (FTIR). The thermal properties were investigated by differential scanning calorimetry (DSC) and thermal conductivity coefficient instrument, respectively.

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