Polyurethane-based solid-solid phase change materials with in situ reduced graphene oxide for light-thermal energy conversion and storage

Zhou, Yan; Liu, Xiangdong; Sheng, Dekun; Lin, Chucheng; Ji, Fance; Li, Dong; Xu, Shaobin; Wu, Haohao; Yang, Yuming

doi:10.1016/j.cej.2018.01.021

Cited by 161 publications

(64 citation statements)

References 42 publications

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“…Moreover, the as‐prepared composites exhibited high shape‐stabilized property. Figure shows the shape‐stabilized features of BN/cMOG/PCM composites investigated using hot‐stage‐digital camera technology . In contrast to the pure PCM, which displayed a phase change during heating (pointed in red, Figure b), BN/cMOG/PCM composites were maintained their original shape above the melting temperature of pure PCM (80 °C), thus confirmed their advantageous shape stability performance of the composites.…”

Section: Resultsmentioning

confidence: 74%

“…The peak intensity ratio ( r = I D / I G ) for the samples exhibited a partial graphitic carbon structure ( r < 1.0), which is advantageous for heat transfer performance of PCMs in composite materials . In addition, the peak depicted at 2880 cm –1 is related to 2D, which helps to generate high surface area and better textural properties, and also provides reasonable information for heat transfer during phase change process . Similarly, cMOG exhibited two distinct broad patterns situated at about 23.3° and 44.9° due to the diffraction (002) and (100), correspondingly (Figure a).…”

Section: Resultsmentioning

confidence: 97%

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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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Section: Resultsmentioning

confidence: 74%

Section: Resultsmentioning

confidence: 97%

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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“…Meanwhile, the highest temperature of microPCMs‐15 attains to 78.82°C at 3200 seconds. According to the previous report, the photothermal conversion efficiency ( η ) is evaluated as below Equation :

normalη (() %) = \frac{m normalΔ H_{m}}{normalε S ((), t_{2} - t_{1})} .

…”

Section: Resultsmentioning

confidence: 99%

“…The η is distinctly enhanced along with the increasing of GO. The main reason is that the GO possesses excellent ability of capture light photon …”

Section: Resultsmentioning

confidence: 99%

Multifunctional phase change microcapsules based on graphene oxide Pickering emulsion for photothermal energy conversion and superhydrophobicity

Zhao

Yang

et al. 2020

Int J Energy Res

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Summary In order to enlarge the applications of microencapsulated phase change materials (microPCMs), the novel stearic acid (SA)@graphene oxide (GO)/melamine‐formaldehyde (MF) multifunctional superhydrophobic microPCMs were prepared with the method of condensation polymerization. We have made a systematical study of the effects of GO content on the SA@GO/MF microPCMs. The morphology and chemical composition characterizations showed the successful fabrication of microcapsules. The differential scanning calorimeter (DSC) identified that microPCMs could store latent heat energy. According to the contact angles (CA) measurement, the microPCMs displayed the water contact angle of 160.2°, which possessed the superhydrophobic property. Moreover, the self‐cleaning property of SA@GO/MF microPCMs was demonstrated by designing self‐cleaning experiment. The simulated irradiation experiment showed the good photothermal conversion performance of microPCMs. Owing to photothermal energy conversion performance and superhydrophobicity, multifunctional phase change microcapsules could have vital potentials in energy conversion and self‐cleaning.

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“…Radial distribution function g ( r ) is defined by the following formula:

g ((), r) = 4 π r^{2} ρ ((), r),

where ρ ( r ) is number density and r is the distribution radius.…”

Section: Materials and Experimentsmentioning

confidence: 99%

Quantitative evaluation on oil diffusion mechanisms in nano‐organic‐montmorillonite modified caster oil‐based polyurethane foam for oil/water separation

Zhou

Huang

2020

Polymers for Advanced Techs

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To improve the oil absorbency of caster oil-based polyurethane foam, nano-organicmontmorillonite (OMMT) was used for the additives. The aim of this study is to evaluate the oil diffusion mechanism and dispersion uniformity of OMMT modified caster oil-based polyurethane (MPU) using experiments and molecular dynamic simulation.Molecule movement and molecule trajectory of oil was investigated by molecular dynamic simulation and numerical simulation. According to the quantitative analyzing results, the diffusion model was put forward. The average diffusion coefficient of crude oil in 0, 1, 2 wt%, 4, and 6 wt% MPU is 2.4 × 10 −4 cm 2 /s, 2.6 × 10 −4 cm 2 /s, 3.0 × 10 −4 cm 2 /s, 3.2 × 10 −4 cm 2 /s, and 3.3 × 10 −4 cm 2 /s, respectively. It indicated that crude oil appeared gradient in the MPU. The optimal diffusion direction of crude oil is (0, 0, 1) crystal face, and the small particles of crude oil are easy to be adsorbed.The two-dimensional diffusion trajectory of crude oil is nonlinear. The diffusion model includes the diffusion of crude oil at the interface of oil and polyurethane, surface diffusion and pore diffusion, and pore adsorption. Furthermore, the diffusion model showed that the van der Waals force was the main reason for crude oil diffusion or adsorption. OMMT could improve the ability of oil/water separation of polyurethane. K E Y W O R D Sdiffusion mechanism, modeling and simulation, nano-organic-montmorillonite, polyurethane, quantitative evaluation

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Polyurethane-based solid-solid phase change materials with in situ reduced graphene oxide for light-thermal energy conversion and storage

Cited by 161 publications

References 42 publications

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

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

Multifunctional phase change microcapsules based on graphene oxide Pickering emulsion for photothermal energy conversion and superhydrophobicity

Quantitative evaluation on oil diffusion mechanisms in nano‐organic‐montmorillonite modified caster oil‐based polyurethane foam for oil/water separation

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