Simple deceleration mechanism confirmed in the terminal hypervelocity impacted tracks in SiO2 aerogel

Liu, Mingfang; Du, Ai; Li, Tiemin; Zhang, Ting; Zhang, Zhihua; Cao, Guangwei; Li, Hongwei; Shen, Jun; Zhou, Bin

doi:10.1016/j.icarus.2018.08.017

Cited by 4 publications

(2 citation statements)

References 29 publications

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“…In the early stage of penetration, the momentum loss of particles is small, and the heat generated is low. The surface of the aerogel will be punctured and stretched elastically by the particle, and then spring back into a smaller hole [28] . As shown in Figure 5(a), distributed microcracks around the entrance hole are observed.…”

Section: Resultsmentioning

confidence: 99%

Morphology analysis of tracks in the aerogels impacted by hypervelocity irregular particles

Liu

et al. 2021

High Pow Laser Sci Eng

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As an attractive collector medium for hypervelocity particles, combined with outstanding physical properties and suitable compositional characteristics, SiO2 aerogel has been deployed on outer space missions and laser shock-loaded collection experiments. In this paper, impact experiments were conducted to understand the penetration process of irregular grains, irregular Al2O3 grains with two different sizes and speeds (~110 μm@7 km/s, ~251 μm@2.3 km/s) at various density silica aerogels. By classifying the shapes of projectile residues and tracks, the morphology of tracks was analyzed. It was observed that there were several kinds of typical tracks in the penetration of irregular grains, accompanied by residues with the shapes of near-sphere, polyhedron, streamlined body wedge, and rotator. The rotational behavior was demonstrated by the final status of one flake projectile as direct evidence. In addition, there was no obvious relationship between the track length and experimental parameters, which may be caused by the uncertain interaction between aerogels and irregular particles. In addition, it confirmed the existence of fragmentation, melting situation by observing the shape of the impact entrance hole. At the same time, optical coherence tomography was used to observe the detail of tracks clearly, which provided a method to characterize the tracks nondestructively.

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Section: Resultsmentioning

confidence: 99%

Morphology analysis of tracks in the aerogels impacted by hypervelocity irregular particles

Liu

et al. 2021

High Pow Laser Sci Eng

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“…Aerogel is a class of solid materials with controllable micro‐ or nano‐sized pores, high porosity, extremely low density and specific surface area and the resulting 3D network is filled with gas in place of liquid . These unique properties make it widely used in many fields, such as thermal insulation, sound insulation, supercapacitors, microwave absorption, optical lightweight optics, and chemical and biological separation, Recently, porous aerogels with excellent absorption properties have been intensively studied and started to play an irreplaceable role in oil/water separation due to their high oil absorption capacity and fast oil absorption rate, So far, the reported aerogels include graphene aerogel, carbon nanotube (CNT) aerogel, silicon aerogel, organic aerogel, biomass aerogel and so on. Graphene and carbon nanotubes aerogels are widely used in oil/water separation due to its stable mechanism properties, developed porosity and excellent recyclability, but the expensive cost of graphene and CNT aerogel and complex process limit their practical application.…”

Section: Introductionmentioning

confidence: 99%

3D hierarchical MnO₂ aerogels with superhydrophobicity for selective oil–water separation

Qiu

Zhang

Yue

et al. 2019

Applied Organom Chemis

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Inorganic nanowire aerogel with low density, high specific surface area and high porosity has received increasing attention in the field of materials physics and chemistry because of not only the unique structural and physical features of metallic oxide but also low cost, environmental friendliness and earth abundant of precursor materials. In this work, MnO2 nanowire aerogels (MNA) with ultralow density, and stable 3D hierarchical structures was successfully fabricated by freeze‐drying processes using MnO2 nanowire as building blocks. The length of MnO2 nanowires exceeds 100 μm, making it easier to cross‐link and self‐assemble into a 3D network of aerogels, and the acid and alkali resistance of MnO2 enables it to adapt to extreme environments. Simultaneously, the monodispersed MnO2 nanowire was prepared by the hydrothermal method, followed by acid treatment. To obtain superhydrophobic properties and achieve selective oil adsorption, the surfaces of nanowire aerogels were grafted the hydrophobic groups with low surface energy via vapor deposition. It is indicated that the obtained 3D hierarchical MNA show both superhydrophobic and super‐lipophilic properties simultaneously with a high‐water contact angle of 156° ± 2° and an oil contact angle of 0°. And the MNA exhibited a high oil adsorption capacity of 85–140 g/g, thereby indicating its potential applications in oil/water separation. More importantly, the resulting MNA can be recycled ten cycles without loss of oil absorption capacity (more than 120 g/g). The results presented in this work demonstrate that the as‐prepared nanowire aerogel may find applications in chemical separation and environmental remediation for large‐scale absorption of oils from water.

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Resveratrol-silica aerogel nanodrug complex system enhances the treatment of sports osteoarthritis by activating SIRT-1

Qin

Jing

Cui

et al. 2022

Adv Compos Hybrid Mater

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Simple deceleration mechanism confirmed in the terminal hypervelocity impacted tracks in SiO2 aerogel

Cited by 4 publications

References 29 publications

Morphology analysis of tracks in the aerogels impacted by hypervelocity irregular particles

Morphology analysis of tracks in the aerogels impacted by hypervelocity irregular particles

3D hierarchical MnO₂ aerogels with superhydrophobicity for selective oil–water separation

Resveratrol-silica aerogel nanodrug complex system enhances the treatment of sports osteoarthritis by activating SIRT-1

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Simple deceleration mechanism confirmed in the terminal hypervelocity impacted tracks in SiO2 aerogel

Cited by 4 publications

References 29 publications

Morphology analysis of tracks in the aerogels impacted by hypervelocity irregular particles

Morphology analysis of tracks in the aerogels impacted by hypervelocity irregular particles

3D hierarchical MnO2 aerogels with superhydrophobicity for selective oil–water separation

Resveratrol-silica aerogel nanodrug complex system enhances the treatment of sports osteoarthritis by activating SIRT-1

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3D hierarchical MnO₂ aerogels with superhydrophobicity for selective oil–water separation