Superhydrophobic fluorine-rich conjugated microporous polymers monolithic nanofoam with excellent heat insulation property

Wei, Huijuan; Wang, Fei; Qian, Xueren; Li, Shan; Hu, Zhi-Long; Sun, Hanxue; Zhu, Zhaoqi; Liang, Weidong; Ma, Chonghua

doi:10.1016/j.cej.2018.06.162

Cited by 72 publications

(32 citation statements)

References 62 publications

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“…Polymer materials have been extensively applied in aerospace because of their strong mechanical properties, high wear resistance, good self‐lubrication properties, easy manufacturing processes, and chemical inertness . Particularly, organic bonded lubricating coatings (OBLCs) provides excellent radiation resistance for spacecraft as a surface protection material and plays an active role in reducing friction and improving the wear resistance of the spacecraft.…”

Section: Introductionmentioning

confidence: 99%

Tribological properties of the polyacrylate/PTFE coating modified by POSS in the space environment

Wan

et al. 2019

J of Applied Polymer Sci

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The irradiation conditions in the low earth orbit (LEO) severely inhibit the development of polymeric materials for solid lubrication coatings used on the external surfaces of spacecraft. To solve the problem, octavinyl polyhedral oligomeric silsesquioxanes (OvPOSS) were covalently grafted onto poly(methyl/butyl methacrylate) composites (PMB). The results showed that the appropriate incorporation of OvPOSS (10 wt %) significantly reduced the friction coefficient and improved the wear resistance of the OvPOSS/PMB composite coatings. Furthermore, the impact of OvPOSS on the tribological properties of PMB/polytetrafluoroethylene (PTFE) lubrication coatings in the space environment was investigated. In particular, the degradations, mass losses, surface morphologies, and chemical compositions of POSS/PMB/PTEF composite coatings were characterized under ultraviolet (UV), electric irradiation (EI), and atomic oxygen (AO). The results indicated that OvPOSS provides numerous SiOSi bonds in the polymer matrix that improve the resistance to UV and EI. Besides, a passivating SiO2 layer was formed to prevent further erosion and degradation of the underlying PMB and PTFE components during AO irradiation. Particularly, the wear resistance of OvPOSS/PMB/PTFE coatings under AO irradiation increased significantly compared with the pristine PMB/PTFE coating. Overall, our results indicate that POSS‐containing composites are a good prospective material for space application in the LEO. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020, 137, 48730.

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Section: Introductionmentioning

confidence: 99%

Tribological properties of the polyacrylate/PTFE coating modified by POSS in the space environment

Wan

et al. 2019

J of Applied Polymer Sci

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“…Overall, the extremely low thermal conductivity obtained in this work represents the best thermal insulation performances (measured under ambient conditions) among the values recently reported for state‐of‐the‐art approaches for thermally insulating structured materials ( Figure C). [ 7 − 11,15,18 − 20,31 − 48 ]…”

Section: Resultsmentioning

confidence: 99%

Graphene‐Based Ultralight Compartmentalized Isotropic Foams with an Extremely Low Thermal Conductivity of 5.75 mW m⁻¹ K⁻¹

Lee

Yoo

2020

Adv Funct Materials

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The importance of high-performance thermal insulation materials is rapidly emerging due to energy conservation and the management of temperaturesensitive device perspectives. Recent thermal insulation materials including complex structures have been developed either by reducing the structural connectivity to mitigate thermal transport through solid conduction or forming directionally aligned confined inner pores to suppress the internal gas convection. In this study, to create a highly efficient thermal insulating material that suppresses thermal transport in all directions, graphene-based anisotropic closed-cellular structures (CCS) are devised with a highly ordered assembly of hollow compartments with extremely thin walls (≈50 nm). This uniquely designed CCS made from microfluidically synthesized graphene solid bubbles exhibited a remarkably low thermal conductivity of 5.75 mW m −1 K −1 thanks to effective suppression of both solid conduction and gas conduction/convection. Therefore, the proposed strategy in this work offers a novel toolkit for implementing next-generation high-performance insulation materials.

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“…As shown in Figure a, the black RGO coating provides the light absorbing layer which can capture the sunlight and convert it to heat. The CF as a support with a low thermal conductivity confines the heat, avoids energy loss to the surrounding, and can quickly warm up the localized water into vapor . Furthermore, the support is comprised with superhydrophilic polymer fiber arrays, which can ensure water transportation and enable a rapid supply of water to the surface.…”

Section: Resultsmentioning

confidence: 99%

“…The CF as as upport with al ow thermalc onductivity confines the heat, avoidsenergy loss to the surrounding, and can quickly warm up the localized water into vapor. [38,39] Furthermore, the support is comprised with superhydrophilic polymer fiber arrays, which can ensure water transportation and enablea rapid supply of water to the surface. The water evaporation efficiency of RGO-CF was investigated using al ab-made measurement systeme quipped with solar stimulator (Figure 6b).…”

Section: Resultsmentioning

confidence: 99%

Photothermal Conversion Material Derived from Used Cigarette Filters for Solar Steam Generation

Sun

Zhu

et al. 2019

ChemSusChem

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Solar steam generation by photothermal materials has recently emerged as a new and feasible approach to effectively harvest solar energy in a variety of applications. This work reports an efficient heat localization material based on the renewable cellulose acetate cigarette filters and a reduced graphene oxide coating (RGO‐CF) as the light‐to‐heat conversion layer for solar steam generation. RGO‐CF possessed an aligned structure with superhydrophilic nature, lower thermal conductivity (0.0733 Wm−1 K−1), and broad light adsorption (≈100 %). These characteristics enable rapid water transportation and excellent light‐to‐heat conversion by the resulting RGO‐CF with an energy conversion efficiency of 94 % under stimulated solar illumination (1 kW m−2), which demonstrates that RGO‐CF is a promising photothermal conversion material for solar steam generation. Such strategy for preparation of photothermal materials not only reduces the fabrication cost but also provides a fundamental guidance for the practical application of renewable polymer resources from used cigarette filters.

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Superhydrophobic fluorine-rich conjugated microporous polymers monolithic nanofoam with excellent heat insulation property

Cited by 72 publications

References 62 publications

Tribological properties of the polyacrylate/PTFE coating modified by POSS in the space environment

Tribological properties of the polyacrylate/PTFE coating modified by POSS in the space environment

Graphene‐Based Ultralight Compartmentalized Isotropic Foams with an Extremely Low Thermal Conductivity of 5.75 mW m⁻¹ K⁻¹

Photothermal Conversion Material Derived from Used Cigarette Filters for Solar Steam Generation

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Superhydrophobic fluorine-rich conjugated microporous polymers monolithic nanofoam with excellent heat insulation property

Cited by 72 publications

References 62 publications

Tribological properties of the polyacrylate/PTFE coating modified by POSS in the space environment

Tribological properties of the polyacrylate/PTFE coating modified by POSS in the space environment

Graphene‐Based Ultralight Compartmentalized Isotropic Foams with an Extremely Low Thermal Conductivity of 5.75 mW m−1 K−1

Photothermal Conversion Material Derived from Used Cigarette Filters for Solar Steam Generation

Contact Info

Product

Resources

About

Graphene‐Based Ultralight Compartmentalized Isotropic Foams with an Extremely Low Thermal Conductivity of 5.75 mW m⁻¹ K⁻¹