Microencapsulated phase change materials based on graphene Pickering emulsion for light-to-thermal energy conversion and management

Zhao, Qihang; He, Fangfang; Zhang, Quanping; Fan, Jinghui; He, Rujie; Zhang, Kai; Yan, Haiyu; Yang, Wenbin

doi:10.1016/j.solmat.2019.110204

Cited by 72 publications

(32 citation statements)

References 51 publications

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“…According to our previous work, we synthesized MF prepolymer solution. Then, dropping MF prepolymer to the prepared Pickering emulsions in 80°C with 400 rpm/min for 120 minutes.…”

Section: Methodsmentioning

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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“…According to our previous work, we synthesized MF prepolymer solution. Then, dropping MF prepolymer to the prepared Pickering emulsions in 80°C with 400 rpm/min for 120 minutes.…”

Section: Methodsmentioning

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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“…Although several solid particles have been applied as stabilizers in Pickering emulsion polymerization, particles derived from natural polymers are the most promising emulsifiers in consideration of the practical applications of Pickering emulsions in foods, cosmetics, and pharmaceuticals. Starch is an abundant and renewable natural polymer that is a promising candidate for the design of a Pickering emulsifier because of its hydrophilicity, good biocompatibility, and low cost .…”

Section: Introductionmentioning

confidence: 99%

Synthesis of millimeter‐sized hydrogel beads by inverse Pickering polymerization using starch‐based nanoparticles as emulsifier

Zhai

Zhang

Wang

et al. 2020

Polymers for Advanced Techs

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The preparation of millimeter-sized poly(acrylamide-co-acrylic acid) hydrogel beads via inverse Pickering emulsion polymerization using starch-based nanoparticles (SNPs) as stabilizers is reported. Amphiphilic starch is fabricated by the introduction of butyl glycidyl ether groups and palmitate groups, and the hydrophobically modified SNPs are fabricated by a nanoprecipitation process. The obtained SNPs could adsorb at oil-water interfaces to stabilize an inverse Pickering emulsion, and the effects of oil/water volume fraction ratio and SNP concentration on emulsions are comprehensively studied. Poly(acrylamide-co-acrylic acid) hydrogel beads with a size of approximately 1 mm are obtained by inverse Pickering emulsion polymerization stabilized by SNPs. The morphology and structure of hydrogel beads are extensively investigated, which confirms that SNPs locate on the surface of hydrogel beads and act as emulsifiers and network structures present inside the beads. Polymerization is also detected to investigate the potential formation mechanism of hydrogel beads. The pHresponsive property of hydrogel beads and its potential application for drug delivery are also explored.emulsifier, formation mechanism, hydrogel beads, inverse Pickering polymerization, starchbased nanoparticles

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“…SR has therefore been used as thermal interface materials to reduce the thermal interface resistance for more efficient heat dissipation and increase of span life [36][37][38]. Similarly, improved performance would be expected if SR is used in PCMs [39][40][41]. Fillers with high thermal conductivity, such as graphene, have been utilized in SR based PCMs to enhance their conductivity [40].…”

Section: Introductionmentioning

confidence: 99%

“…Similarly, improved performance would be expected if SR is used in PCMs [39][40][41]. Fillers with high thermal conductivity, such as graphene, have been utilized in SR based PCMs to enhance their conductivity [40]. However, the published research generally requires the use of microencapsules of PW to avoid the leakage issue [39][40][41].…”

Section: Introductionmentioning

confidence: 99%

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Expanded Graphite/Paraffin/Silicone Rubber as High Temperature Form-stabilized Phase Change Materials for Thermal Energy Storage and Thermal Interface Materials

Zhang

Huang

et al. 2020

Materials

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In this work, expanded graphite/paraffin/silicone rubber composite phase-change materials (PCMs) were prepared by blending the expanded graphite (EG), paraffin wax (PW) and silicone rubber (SR) matrix. It has been shown that PW fully penetrates into the three dimensional (3D) pores of EG to form the EG/PW particles, which are sealed by SR and evenly embedded in the SR matrix. As a result of the excellent thermal stability of SR and the capillary force from the 3D pores of EG, the EG/PW/SR PCMs are found to have good shape stability and high reliability. After being baked in an oven at 150 °C for 24 h, the shape of the EG/PW/SR PCMs is virtually unchanged, and their weight loss and latent heat drop are only 7.91 wt % and 11.3 J/g, respectively. The latent heat of the EG/PW/SR composites can reach up to 43.6 and 41.8 J/g for the melting and crystallizing processes, respectively. The super cooling of PW decreased from 4.2 to 2.4 due to the heterogeneous nucleation on the large surface of EG and the sealing effect of the SR. Meanwhile, the thermal conductivity of the EG/PW/SR PCMs reaches 0.56 W·m−1·K−1, which is about 2.8 times and 3.73 times of pure PW and pristine SR, respectively. The novel EG/PW/SR PCMs with superior shape and thermal stabilities will have a potential application in heat energy storage and thermal interface materials (TIM) for electronic devices.

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Microencapsulated phase change materials based on graphene Pickering emulsion for light-to-thermal energy conversion and management

Cited by 72 publications

References 51 publications

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

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

Synthesis of millimeter‐sized hydrogel beads by inverse Pickering polymerization using starch‐based nanoparticles as emulsifier

Expanded Graphite/Paraffin/Silicone Rubber as High Temperature Form-stabilized Phase Change Materials for Thermal Energy Storage and Thermal Interface Materials

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