Two-staged sorption isotherm of a nanoporous energy absorption system

Surani, Falgun B.; Kong, Xiangying; Qiao, Yu

doi:10.1063/1.2144280

Cited by 42 publications

(33 citation statements)

References 9 publications

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“…Based on this concept, nanoporous energy absorption systems (NEAS) have recently received considerable attention. [3][4][5][6] As nominally hydrostatic pressure is applied on a system consisting of hydrophobic nanoporous particles immersed in water, pressure-induced infiltration occurs when the capillary effect is overcome. As a result, the large pore surface is exposed to the nonwetting liquid, and a significant amount of mechanical work is converted to the excess solid-liquid interfacial tension, which can be regarded as being dissipated because, in many nanoporous materials, the confined liquid would remain in the initially nonwettable nanopores even after the external pressure is entirely removed.…”

Section: Introductionmentioning

confidence: 99%

Thermal recoverability of a polyelectrolyte-modified, nanoporous silica-based system

2006

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The thermal recoverability of a nanoporous silica-based system modified by a cross-linked polyelectrolyte is investigated. At room temperature, as a nominally hydrostatic pressure is applied, the gel matrix can be partially dehydrated. The released water molecules will be forced into the initially energetically unfavorable nanopores and are "locked" there. At an elevated temperature, the infiltration pressure increases slightly, which is contradictory to the experimental data of the unmodified system. More importantly, the defiltration of the confined liquid is significantly promoted, leading to a much higher system recoverability.

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Section: Introductionmentioning

confidence: 99%

Thermal recoverability of a polyelectrolyte-modified, nanoporous silica-based system

2006

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“…Recently, Surani and co-workers [13][14][15] investigated a novel liquid-based damping system. As a hydrophobic nanoporous silica gel was added in water, when the hydrostatic pressure reached the critical value for overcoming the capillary effect, pressure-induced infiltration could take place in the nanopores.…”

Section: Introductionmentioning

confidence: 99%

An experimental investigation on a nanoporous carbon functionalized liquid damper

Punyamurtula¹,

Han²,

Qiao³

2006

Philosophical Magazine Letters

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The behaviour of a p-xylene-based lyophobic nanoporous carbon system under high hydrostatic pressures is investigated. As the pressure is increased to a critical value, the nanopore surfaces between graphene layers are exposed to the liquid phase, leading to a considerable increase in solid-liquid interfacial energy. During unloading, defiltration does not occur until the pressure is much lower. Thus, the system is energy absorbing. Owing to the large solid-liquid contact area, the energy absorption efficiency is much higher than that of conventional dampers.

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“…Obviously, its property shows that this system can be used for body protection in sport field even though it can't be utilized in high-velocity impact protection in military. In the nanoenvironment, the inner surface of nanopore should be considered because the NPLs infiltration pressure is created when the promoters are forced into nanopore [18,22].…”

Section: Future Workmentioning

confidence: 99%

Characterization of hydrophobic nanoporous particle liquids for energy absorption

Hsu

Liu

2016

SPIE Proceedings

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ACKNOWLEDGEMENTS ABSTRACTRecently, the development of hydrophobic nanoporous technologies has drawn increased attention, especially for the applications of energy absorption and impact protection. Although significant amount of research has been conducted to synthesis and characterize materials to protect structures from impact damage, the tradition methods focused on converting kinetic energy to other forms, such as heat and cell buckling. Due to their high energy absorption efficiency, hydrophobic nanoporous particle liquids (NPLs) are one of the most attractive impact mitigation materials.During impact, such particles directly trap liquid molecules inside the non-wetting surface of nanopores in the particles. The captured impact energy is simply stored temporarily and isolated from the original energy transmission path. In this paper we will investigate the energy absorption efficiency of combinations of silica nanoporous particles and with multiple liquids. Inorganic particles, such as nanoporous silica, are characterized using scanning electron microscopy. Small molecule promoters, such as methanol and ethanol, are introduced to the prepared NPLs. Their effects on the energy absorption efficiency are studied in this paper. NPLs are prepared by dispersing the studied materials in deionized water. Energy absorption efficiency of these liquids are experimentally characterized using an Instron mechanical testing frame and in-house develop stainless steel hydraulic cylinder system. 1

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Two-staged sorption isotherm of a nanoporous energy absorption system

Cited by 42 publications

References 9 publications

Thermal recoverability of a polyelectrolyte-modified, nanoporous silica-based system

Thermal recoverability of a polyelectrolyte-modified, nanoporous silica-based system

An experimental investigation on a nanoporous carbon functionalized liquid damper

Characterization of hydrophobic nanoporous particle liquids for energy absorption

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