Multi-functional phase change materials with anti-liquid leakage, shape memory, switchable optical transparency and thermal energy storage

Zhang, Haiquan; Mai, Junping; Li, Shuliang; Althakafy, Jalal T.; Liu, Houji; Alanazi, Abdullah K.; El‐Bahy, Salah M.; Li, Xin; Wu, X.; Wang, Renjuan; Wang, Ning; Mai, Xianmin

doi:10.1007/s42114-022-00540-0

Cited by 30 publications

(10 citation statements)

References 43 publications

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“…The latent heats of PCM composites are smaller than pure PCMs, the main reason is that the polymer skeleton does not provide phase change property, the strong interaction between porous skeletons and PCMs also affects the crystallization process. Despite latent heats of PCM composites are lower than pure PCMs, still have comparability with reported materials, such as CNF APTMS /CNT 50 ‐PEG (143.3 J g −1 ), 34 C800K (105.2 J g −1 ), 35 and PMMA/PEG‐6 g (79.9 J g −1 ) 36 . Encapsulation ratio represents load capacity, it can be directly calculated by following equation 37 …”

Section: Resultsmentioning

confidence: 73%

“…Despite latent heats of PCM composites are lower than pure PCMs, still have comparability with reported materials, such as CNF APTMS /CNT 50 -PEG (143.3 J g À1 ), 34 C800K (105.2 J g À1 ), 35 and PMMA/PEG-6 g (79.9 J g À1 ). 36 Encapsulation ratio represents load capacity, it can be directly calculated by following equation. 37 F I G U R E 5 XRD patterns of (a) FNPOPs, (b) PA and PA@FNPOPs, (c) SA and SA@FNPOPs, and (d) PW and PW@FNPOPs.…”

Section: Thermal Properties and Thermal Energy Storage Studiesmentioning

confidence: 99%

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N‐doped flexible triazine‐based porous polymer for thermal energy storage

Jiang

Liu

Tan

et al. 2023

J of Applied Polymer Sci

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Nitrogen atoms has been widely adopted in preparation of porous organic polymers (POPs). In our study, flexible nitrogen porous organic polymers (FNPOPs) with high nitrogen content are synthesized by using acetic acid both as solvent and catalyst. The materials show moderate Brunauer–Emmett–Teller (BET) surface area and outstanding thermal stabilities (Td: 330°C). FNPOP‐2 is prepared into phase change material (PCM) composites by self‐adsorption method. From differential scanning calorimetry (DSC) analysis, the PCM composites show high encapsulation ratio (55.2 wt%) and latent heat (135.7 J g−1) due to flexible structure and high nitrogen atomic content. Furthermore, the thermal energy storage properties of all PCM composites remained after several thermal cycles. In general, FNPOPs have potential applications in phase change materials adsorption and thermal energy storage.

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Section: Resultsmentioning

confidence: 73%

Section: Thermal Properties and Thermal Energy Storage Studiesmentioning

confidence: 99%

N‐doped flexible triazine‐based porous polymer for thermal energy storage

Jiang

Liu

Tan

et al. 2023

J of Applied Polymer Sci

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“…Even so, the insulation effect achieved by the porous aerogel structure alone cannot fully meet the infrared stealth requirements because of the limited heat capacity and rapid heat equilibrium rate. Therefore, n-octadecane with thermal energy absorption capacity , is partially impregnated into the bottom half of the aerogel skeleton to optimize the heat-insulating behavior (Figures S9 and S10a). Notably, n-octadecane is firmly encapsulated in the MG aerogel via capillary action, − in which it skillfully distributes in the bottom part and adheres to the walls (Figures S3 and S10b), preserving porous channels to insulate sensible heat after completing the transformation.…”

Section: Resultsmentioning

confidence: 99%

Adaptive and Adjustable MXene/Reduced Graphene Oxide Hybrid Aerogel Composites Integrated with Phase-Change Material and Thermochromic Coating for Synchronous Visible/Infrared Camouflages

Luo

Yang

et al. 2023

ACS Nano

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Although single-function camouflage under infrared/visible bands has made great advances, it is still difficult for camouflage materials to cope with the synergy detection spanning both visible and infrared spectra and adapt to complex and variable scenarios. Herein, a trilayer composite integrating thermal insulation, heat absorption, solar/electro-thermal conversions, and thermochromism is fabricated for visible and infrared dual camouflages by combining anisotropic MXene/reduced graphene oxide hybrid aerogel with the n-octadecane phase change material in its bottom and a thermochromic coating on its upper surface. Benefiting from the synergetic heat-transfer suppression derived from the thermal insulation of the porous aerogel layer and the heat absorption of the n-octadecane phase-change layer, the composite can serve as a cloak to hide the target signatures from the infrared images of its ambient surroundings during the day in the jungle and at night in all scenes and can assist the target in escaping visual surveillance by virtue of its green appearance. For desert scenarios, the composite can spontaneously increase its surface temperature via its solar-thermal energy conversion, merging infrared images of the targets into the high-temperature surroundings; meanwhile, it can vary the surface color from the original green to yellow, enabling the target to visually disappear from ambient sands and hills. This work provides a promising strategy for designing adaptive and adjustable integrated camouflage materials to counter multiband surveillance in complicated environments.

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“…However, the traditional textile has no such function (Figure b). It is worth noting that this personal radiative cooling is completely passive and does not require any energy input to radiate human body heat into cold outer space. − …”

Section: Introductionmentioning

confidence: 99%

“…Since the MIR radiation emitted by human skin (7–14 μm) overlaps with most traditional textiles’ MIR absorption wavelength range, the textiles can easily absorb human radiation and have low MIR transmittance. − This is where the difficulty lies in developing a material that is transparent to infrared light but opaque to visible light. Some studies have found that polyolefin, which has only aliphatic C–C bonds and C–H bonds, can meet the conditions and have great potential to be used for PTM. , For example, an increasing amount of research has been done on the use of polyethylene (PE) recently. , Hsu et al processed the nanoPE to develop a textile that promotes effective radiative cooling while still having wearability.…”

Section: Introductionmentioning

confidence: 99%

A Shish-Kebab Superstructure Film for Personal Radiative Cooling

Liu

Pan

et al. 2023

ACS Appl. Mater. Interfaces

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Due to global warming and the energy crisis, incorporating passive radiative cooling into personal thermal management has attracted extensive attention. However, developing a wearable textile that reflects incoming sunlight and allows mid-infrared radiation transmission is still a tough challenge. Herein, a shish-kebab superstructure film was produced via a flow-induced crystallization strategy for personal radiative cooling. The resulting film endowed a high infrared transmittance (87%) and improved sunlight reflectivity (83%). A device was developed to simulate the human body skin, and the temperatures of the shish-kebab film were 2.5 and 2.6 °C lower than that of traditional textile in outdoor and indoor tests, respectively. In order to make the shish-kebab film more wearable, a series of modifications were then carried out. This study demonstrates the substantial potential to personal thermal management textiles.

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Multi-functional phase change materials with anti-liquid leakage, shape memory, switchable optical transparency and thermal energy storage

Cited by 30 publications

References 43 publications

N‐doped flexible triazine‐based porous polymer for thermal energy storage

N‐doped flexible triazine‐based porous polymer for thermal energy storage

Adaptive and Adjustable MXene/Reduced Graphene Oxide Hybrid Aerogel Composites Integrated with Phase-Change Material and Thermochromic Coating for Synchronous Visible/Infrared Camouflages

A Shish-Kebab Superstructure Film for Personal Radiative Cooling

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