Polypyrrole-coated expanded graphite-based phase change materials for photothermal energy storage

Liu, Changqing; Wan, Ying; Gao, Yan; Dong, Chen; Chen, Xiao

doi:10.1016/j.mtnano.2023.100376

Cited by 16 publications

(10 citation statements)

References 40 publications

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“…Moreover, low thermal conductivity and leakage in the liquid state of pure PCMs greatly limit them in practical applications. 6,7 To overcome these challenges and unlock the full potential of phase change materials in photo-to-thermal conversion, researchers have turned to the integration of photo-to-thermal conversion materials. Various materials, including carbon materials (porous carbon nanotubes, graphene, and expanded graphite), metals (Au, Ag, Cu, etc.…”

Section: Introductionmentioning

confidence: 99%

“…However, pure PEGs as well as other pure PCMs usually exhibit intrinsically poor photo-to-thermal conversion ability. Moreover, low thermal conductivity and leakage in the liquid state of pure PCMs greatly limit them in practical applications. , …”

Section: Introductionmentioning

confidence: 99%

“…), and organic dyes (polypyrrole, polyaniline, porphyrin, etc. ), have been extensively studied for photo-to-thermal conversion. ,, Comparatively, porous carbon materials exhibit excellent light absorption, high thermal conductivity, and exceptional stability. When incorporated into composite PCMs, these carbon scaffolds can not only improve light absorption and facilitate efficient heat transfer for rapid phase transitions but also effectively prevent liquid PCM from leakage by capillary and surface tension forces of the porous structure .…”

Section: Introductionmentioning

confidence: 99%

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Using Carbonized Cotton Fabric Waste to Prepare Poly(ethylene glycol) Composite Phase Change Materials with Improved Thermal Conductivity and Solar-to-Thermal Conversion

Tien Nguyen,

Minh Tam,

Thi Nhung

2024

ACS Omega

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Poly(ethylene glycol) (PEG) boasts excellent thermal energy storage capabilities but lacks efficiency in thermal conductivity and solar absorption. Simultaneously, the escalating concern surrounding the substantial volume of discarded cotton fabric underscores environmental issues. In this study, we devised composite phase change materials (PCMs) by embedding PEG into a carbon cotton material (CCM), varying PEG content from 50 to 80%, and conducted a comprehensive analysis of their thermal properties and solar-to-thermal conversion. The CCM, crafted from a waste 100% cotton towel through carbonization, provided an optimal porous structure that accommodated a significant 70% PEG content without any leakage, thanks to interactions such as surface tension, capillary forces, and interfacial hydrogen bonds. These PEG/CCM composites exhibited impressive crystallization fractions (>92%), resulting in notable thermal energy storage capacities ranging from 85.3 to 143.2 J/g as the PEG content increased from 50 to 80%. Moreover, these composites showed high thermal stability and exceptional cycling durability even after 500 melting/crystallization cycles. Notably, their thermal conductivities markedly increased to a range of 0.46−0.85 W/m•K compared to pure PEG's modest 0.24 W/m•K. Furthermore, the PEG/CCM composites substantially augmented visible and near-infrared (VIS-NIR) light absorption. Evaluation of solar-to-thermal conversion illustrated the composite's ability to efficiently convert solar energy into thermal energy, storing and subsequently releasing it through melting and crystallization processes. This study introduces a novel class of composite PCMs characterized by cost-effectiveness, outstanding thermal performance, and impressive solar-to-thermal conversion capabilities. These composite PCMs hold significant promise for large-scale solar-to-thermal energy storage applications while contributing to the sustainability of cotton waste management.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Using Carbonized Cotton Fabric Waste to Prepare Poly(ethylene glycol) Composite Phase Change Materials with Improved Thermal Conductivity and Solar-to-Thermal Conversion

Tien Nguyen,

Minh Tam,

Thi Nhung

2024

ACS Omega

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“…19,21–23 Extensive efforts have been devoted to encapsulating organic PCMs into porous carriers with high thermal conductivity to develop shape-stabilized composite PCMs to deal with these challenges. 21,23 The most commonly used support materials include expanded graphite (EG), 24,25 porous carbon, 4,26 metal foam, 27 carbon-based aerogels, 28 etc . It is widely accepted that the interaction between the macropores of matrices and PCMs is not strong enough to effectively prevent liquid leakage, whereas nanometer-scale confinement can stabilize the PCMs through the capillary force, hydrogen bonding interaction and other interactions, thus achieving a more powerful encapsulation.…”

Section: Introductionmentioning

confidence: 99%

Integration of phase change materials with multi-responsive halloysite nanotubes for efficient Pickering emulsification of high-viscosity oil

Dong,

Zhang,

et al. 2024

J. Mater. Chem. A

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“…Among various form- and shape-stable strategies, the impregnation of organic PCMs into inorganic 3D interconnected foam networks is a cost-effective way to achieve form/shape stability. These 3D foam networks include expanded graphite, graphene aerogel, boron nitride aerogel, carbon nanotube sponge, and MXene aerogel, − whose large porous structure can prevent the migration and leakage of molten PCMs, providing a high package efficiency and high thermal conductance for the resultant phase-change composites. Therefore, a variety of phase-change composites based on organic PCMs and inorganic 3D foams have been developed for versatile applications, such as air-conditioning systems, energy-saving buildings, photothermal energy storage systems, and Li-ion batteries. − …”

Section: Introductionmentioning

confidence: 99%

Eco-Friendly Flame-Retardant Phase-Change Composite Films Based on Polyphosphazene/Phosphorene Hybrid Foam and Paraffin Wax for Light/Heat-Dual-Actuated Shape Memory

Zhou,

Liu,

Zhang

et al. 2024

ACS Appl. Mater. Interfaces

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Multiactuated shape memory materials are a class of promising intelligent materials that have received great interest in the fields of self-healing, anticounterfeiting, biomedical, soft robotic, and smart thermal management applications. To obtain a light/heat-dual-actuated shape memory material for thermal management applications in fire safety, we have designed a type of halogen-free flame-retardant phase-change composite film based on polyaryloxyphosphazene (PDAP)/phosphorene (PR) hybrid foam as a support material and paraffin wax (PW) as a phase-change material (PCM). PDAP was synthesized as a flexible foam matrix through the ring-opening polymerization of hexachlorocyclotriphosphazene, followed by a substitution reaction of aryloxy groups. The porosity of the PDAP foam is improved by introducing PR nanosheets, facilitating a high latent heat capacity of the PDAP−PR/PW composite films for thermal management applications. The PDAP−PR/PW composite films can implement rapid shape recovery within 65 s in the heating process, which is much shorter than that of the corresponding film without PR nanosheets (185 s). Furthermore, the PDAP−PR/PW composite films also exhibit light-actuated shape memory behavior thanks to their good solar-tothermal energy absorption and conversion contributed by PR nanosheets as a highly effective photothermal material. More importantly, the presence of PR nanosheets imparts an excellent flame-retardant property to the PDAP−PR/PW composite films. The PDAP−PR/PW composite film can be self-extinguished within 2 s after the flame. Through an innovative integration of flexible polyphosphazene foam, PR nanosheets, and solid−liquid PCM to obtain a sensitive actuating response to light and heat, this study offers a new approach for developing multiactuated and eco-friendly flame-retardant shape memory materials to meet the requirement of applications with a requirement of fire safety in soft actuators, thermal therapy, control devices, and so on.

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Polypyrrole-coated expanded graphite-based phase change materials for photothermal energy storage

Cited by 16 publications

References 40 publications

Using Carbonized Cotton Fabric Waste to Prepare Poly(ethylene glycol) Composite Phase Change Materials with Improved Thermal Conductivity and Solar-to-Thermal Conversion

Using Carbonized Cotton Fabric Waste to Prepare Poly(ethylene glycol) Composite Phase Change Materials with Improved Thermal Conductivity and Solar-to-Thermal Conversion

Integration of phase change materials with multi-responsive halloysite nanotubes for efficient Pickering emulsification of high-viscosity oil

Eco-Friendly Flame-Retardant Phase-Change Composite Films Based on Polyphosphazene/Phosphorene Hybrid Foam and Paraffin Wax for Light/Heat-Dual-Actuated Shape Memory

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