Kaolinite stabilized paraffin composite phase change materials for thermal energy storage

Li, Chuanchang; Fu, Liangjie; Ouyang, Jing; Tang, Aidong; Yang, Huaming

doi:10.1016/j.clay.2015.07.033

Cited by 98 publications

(39 citation statements)

References 57 publications

(53 reference statements)

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“…The crystallinity of the SA in the SA/SG 1 (84.44%) was close to that in the SA/SG 5 (84.39%), and they were clearly higher than that in the SA/SG 10 (60.19%). According to our previous research, 13,49 it meant that more conned SA (disordered) in the SA/SG 10 composite, comparing with more free SA (ordered) in the SA/SG 1 and SA/SG 5 composites. That is to say, with increasing the adding ratio of the graphene in the SG composites, more SA were conned by the SG.…”

Section: -49mentioning

confidence: 99%

“…6b and c, the SG 10 had larger pore volume and surface area than that of the SG 1 and SG 5 in the size range of 1-10 nm, signifying more SA hydrocarbon chains were conned in the SA/SG 10 . Moreover, the interaction between the SA and the SG matrix of capillary and surface tension forces could affect the crystallization of the SA, 49 the larger capillary and surface tension forces between the SA and the SG 10 was contributed to the larger BET surface area of the SG 10 ( Table 2). And then the interaction between the SA and the SG matrix in the SA/SG 10 is more than that in the SA/SG 1 and SA/SG 5 .…”

Section: -49mentioning

confidence: 99%

“…Also, the interaction (including surface tension forces and capillary forces) occurred between the SA and the SG matrix would be strong enough to disturb its phase change process when the pore can conne the crystallization of the PCM. 49,52 Colligated the above discussions, the different pore structure of the SG matrix could be a reason to more than one endothermal or exothermal peak in the DSC curves of the SA/SG composites. From the inset of Fig.…”

Section: -49mentioning

confidence: 99%

“…This interesting question may be connected to the special pore structure of the SG matrix on the basis of our previous research. 13,49 To unlock this interesting question and further clarify this hypothesis, the pore structure of the SG matrix were depicted in Fig. 6, and the specic surface areas and porous properties of them were listed in Table 2.…”

Section: -49mentioning

confidence: 99%

“…The conned SA cannot crystallize and will not work for thermal energy storage. 49 The effective energy stored per unit mass of the SA (E ef ) was used to evaluate the effectiveness of the SA in different composites ( Table 1). The SA in the SA/SG 1 and in the SA/SG 5 had a adjacent E ef ($150 J g À1 ) which higher than that of the SA/SG 10 (106.7 J g À1 ).…”

Section: -49mentioning

confidence: 99%

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Graphene-decorated silica stabilized stearic acid as a thermal energy storage material

Xie

Chen

2017

RSC Adv.

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Novel thermal energy storage materials were synthesized from graphene-decorated silica (SG) and stearic acid (SA) by vacuum impregnation method. Three kinds of SG (SG 1 , SG 5 , and SG 10 ) were prepared by decorating silica with different contents of graphene and were then used to stabilize SA to prepare SA/ SG 1 , SA/SG 5 , and SA/SG 10 composites. The structures and thermal energy storage performances of the SA/SG composites were investigated. It is of interest that the thermal energy storage behaviors of the SA/ SG composites were dramatically changed with different contents of graphene, presenting more than one endothermal or exothermal peak in the differential scanning calorimetry (DSC) curves while pure SA had only one. The SA in SA/SG 1 and SA/SG 5 showed higher crystallinity (F c , 84.44% and 84.39%) and greater effective energy storage per unit mass (E ef , $150 J g À1 ) than that of SA in SA/SG 10 . These thermal energy storage behaviors and properties were revealed to be related to the pore structures of the SG.The thermal stability of the SA/SG composites was analyzed by a thermogravimetric analyzer (TGA), and the SA/SG composites have good thermal stability. Addition of graphene was beneficial to the enhancement in thermal conductivity of the SA/SG composite, which could reach 0.90 W m, and 1.12 W m À1 K À1 for SA/SG 1 , SA/SG 5 , and SA/SG 10 , respectively; and were 246%, 304%, and 331% higher than pure SA, respectively. SA/SG 5 has potential for application in thermal energy storage, especially in thermal gradients due to it having both high E ef and thermal conductivity.

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Section: -49mentioning

confidence: 99%

Section: -49mentioning

confidence: 99%

Section: -49mentioning

confidence: 99%

Section: -49mentioning

confidence: 99%

Section: -49mentioning

confidence: 99%

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Graphene-decorated silica stabilized stearic acid as a thermal energy storage material

Xie

Chen

2017

RSC Adv.

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Advances in Nanoclay‐Based Form Stable Phase Change Materials: A Review

Zhao

Zuo

Yang

2023

Adv Materials Technologies

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As the core material of thermal energy storage technology, phase change materials (PCM) suffer serious leakage problems and slow thermal conductivity in applications. Nanoclay with relatively high specific surface area, high thermal conductivity, and abundant pore structure can successfully compensate for the defects in PCM. However, the ability of nanoclay without further modification to encapsulate the PCM for the preparation of form stable phase change materials (FSPCM) and accelerate their heat transfer is limited. Nanoclay is classified into 1D, 2D, and 3D minerals based on their microscopic morphology. In this review, the specific surface and pore structure of three types of nanoclay and their thermal performance after loading with PCM are summarized and compared. Then, different mineral modification treatments, such as pretreatment, surface modification, structural modulation, and functional assembly, are summarized to investigate the enhancement of thermal performance in nanoclay‐based FSPCM. This review also summarizes the state‐of‐the‐art research progress of emerging nanoclay material‐based FSPCM. Finally, a summary of the traditional applications of mineral‐based FSPCM and an outlook on new applications are presented. This paper will help researchers to better understand the recent developments, performance enhancement strategies of nanoclay‐based FSPCM and to identify potential future research efforts.

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Synthesis and Characterization of Paraffin/Metal Organic Gel Derived Porous Carbon/Boron Nitride Composite Phase Change Materials for Thermal Energy Storage

et al. 2018

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New shape-stabilized paraffin/porous carbon materials derived from metal organic gel (cMOG)/boron nitride (BN) composites were prepared by the impregnation method. In the composites, paraffin was used as phase change material, while cMOG as a supporting and loading large paraffin content in the pores owing to high specific surface area and BN employed to enhance the thermal conductivity. The scanning electron microscopy images showed better filler-filler connectivity in BN/cMOG than the individual supporting materials. With the synergy of BN and cMOG, the thermal conductivity of BN/ cMOG/PCM composites exhibited up to 232.1 % of pristine PCM [a] Beijing

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Kaolinite stabilized paraffin composite phase change materials for thermal energy storage

Cited by 98 publications

References 57 publications

Graphene-decorated silica stabilized stearic acid as a thermal energy storage material

Graphene-decorated silica stabilized stearic acid as a thermal energy storage material

Advances in Nanoclay‐Based Form Stable Phase Change Materials: A Review

Synthesis and Characterization of Paraffin/Metal Organic Gel Derived Porous Carbon/Boron Nitride Composite Phase Change Materials for Thermal Energy Storage

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