Fluorinated graphene provides long lasting ice inhibition in high humidity

Akhtar, Naureen; Anemone, Gloria; Farı́as, Daniel; Holst, Bodil

doi:10.1016/j.carbon.2018.09.008

Cited by 48 publications

(37 citation statements)

References 46 publications

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“…The unmodified top surface owns a large water contact angle of 139° with a high hydrophobicity. [ 38 ] The bottom surface is modified to be a hydrophilic state by grafting polyethyleneimine (for details see Figure S13, Supporting Information) and the corresponding water contact angle decreases down to 34° (Figure 5c). It should be noted that many reports try their best to prepare “Janus” graphene‐based monoliths with asymmetrical hydrophilic/hydrophobic structure by various means, thereby achieving particular applications such as moisture generating electricity, [ 39–41 ] touchless interactive panel [ 42 ] and so on.…”

Section: Resultsmentioning

confidence: 99%

Fabrication of Graphene‐Based Self‐Assembly Monoliths through Reversible Fluorination and Defluorination Strategy

Fan

Wang

Liu

et al. 2020

Adv Materials Inter

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The low bending stiffness and inferior self‐lubricating ability of graphene bring about flexible nanosheet and poor mobility, greatly restricting its well‐organized self‐assembly in direct solid‐phase molding. Herein, abundant fluorine atoms are introduced onto graphene nanosheet to obtain fluorinated graphene (FG). A direct dry‐compression molding achieves to rapidly fabricate highly compact FG monolith under room temperature. Tracing origins, the enhanced bending stiffness guarantees relatively flat FG nanosheet and excellent self‐lubricating ability actuates flat FG nanosheets to automatically slip, thereby accomplishing well‐organized and compact layer‐by‐layer stacking with interlock structure. Whereafter, highly compact graphene monolith is finally obtained by high‐temperature annealing, because interlock structure in FG monolith restricts graphene′s deformations during defluorination. Obtained graphene monolith owns a high conductivity of 5.5 × 104 S m−1 and compression strength of 77 MPa, while graphene without above process only forms fluffy foam with a low conductivity of 6.8 S m−1. Interestingly, transitional FG monolith presents a higher compression strength of 102 MPa, ultralow dielectric constant of 1.72 and prolongable chemical reactivity for preparing “Janus” monolith. Designing reversible fluorination and defluorination strategy offers an unexplored avenue to effectively manufacture high‐quality graphene‐based monoliths.

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Section: Resultsmentioning

confidence: 99%

Fabrication of Graphene‐Based Self‐Assembly Monoliths through Reversible Fluorination and Defluorination Strategy

Fan

Wang

Liu

et al. 2020

Adv Materials Inter

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“…Window, aircraft, windshield, reflector, wind turbine, sensor, and offshore operation have been affected to varying degrees . For example, deicing prior to take‐off costs billions of dollars a year, involving expensive power‐consuming systems, and the ethylene glycol–based liquids can also cause environmental pollution . Therefore, the removal and prevention of surface fog and ice is an urgent problem to be solved whether from the perspective of economy, energy, environment, or personal safety.…”

Section: Introductionmentioning

confidence: 99%

“…As a type of coating, antiicing coating can effectively delay the formation of ice on the surface. If the formation of ice can be delayed enough, such as the time that the aircraft stays on the ground before take‐off (usually up to 30 min), then the aircraft will no longer need deicing prior to take‐off . Antiicing coatings need to meet the following conditions: surface waterproof, inhibition of ice nucleation, and low surface adhesion to ice.…”

Section: Introductionmentioning

confidence: 99%

Transparent Electrothermal Film Defoggers and Antiicing Coatings based on Wrinkled Graphene

Zhen

Chai

et al. 2019

Small

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The ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10.1002/smll.201905945. Fog, frost, ice, and other natural phenomena can inevitably affect human life and the function of equipment. Therefore, removal or prevention is an urgent problem to be solved. As a new type of 2D material, graphene possesses great application potential in defogging and antiicing. In this work, a graphene film with intentionally increased defects and uniformly distributed wrinkles is synthesized on copper-zinc alloy substrates by chemical vapor deposition, and transparent electrothermal film defoggers are prepared based on such material. The defoggers can completely remove fog within 5 s when supplying a safe voltage of 28 V. The surface resistance of the defoggers is sensitive to humidity and it can monitor the defogging process in real time. Such outstanding performance is attributed to the ultrafast evaporation mechanism, which can prevent excessive water accumulation. The antiicing performance of wrinkled graphene (WG) is further studied. The antiicing coatings can delay freezing for 1.25 h at −15 °C or 2.8 h at −10 °C. The superior performance of WG can be explained by its unique surface structure and nanoscale roughness. Taken together, WG is expected to be used in antifog glass, rearview mirror defogging, aircraft surface deicing, and other applications.

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“…Due to the specific physicochemical properties of fluorine and corresponding CF bonds, FG exhibits many exceptional properties compared with other graphene derivatives and thus attracts interdisciplinary attentions and interests. [29,30,[34][35][36][37][38][39][40][41][42][43][44] Fluorine atoms have the strongest electronegativity (3.98) among all of the atoms, and the introduction of fluorine atom greatly changes electron distribution of pristine graphene, which results in a series of unique variations in optical and electric properties. [34][35][36][37][38] For instance, the introduced CF bonds destroy the original 2D conjugated structure of graphene and largely open the bandgap, which brings about a tunable bandgap with the different F/C ratios in the range of 0-3.8 eV.…”

Section: Doi: 101002/adma202101665mentioning

confidence: 99%

Recent Advances in Fluorinated Graphene from Synthesis to Applications: Critical Review on Functional Chemistry and Structure Engineering

et al. 2021

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Fluorinated graphene provides long lasting ice inhibition in high humidity

Cited by 48 publications

References 46 publications

Fabrication of Graphene‐Based Self‐Assembly Monoliths through Reversible Fluorination and Defluorination Strategy

Fabrication of Graphene‐Based Self‐Assembly Monoliths through Reversible Fluorination and Defluorination Strategy

Transparent Electrothermal Film Defoggers and Antiicing Coatings based on Wrinkled Graphene

Recent Advances in Fluorinated Graphene from Synthesis to Applications: Critical Review on Functional Chemistry and Structure Engineering

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