Free Vibration of Arches

Karnovsky, Igor A.

doi:10.1007/978-1-4614-0469-9_6

Cited by 1 publication

(1 citation statement)

References 22 publications

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“…Specifically, when the composite coating experienced the loading, a fraction of the compressive energy was used to deform the capsule additives. Since the capsules had a spherical shape, the deformation of the capsules could be treated as similar to arches under a uniform loading with the stresses acting along the arch and hoop lines under compression . Therefore, at the contacting point where the compressive energy impacts the capsules, the compressive behavior occurs in the nanoparticle aggregate external shell while the tensile behavior occurs in the silica inner shell.…”

Section: Resultsmentioning

confidence: 99%

Thermoresponsive Hybrid Colloidal Capsules as an Inorganic Additive for Fire-Resistant Silicone-Based Coatings

Pham

Sencadas

Joseph

et al. 2022

Ind. Eng. Chem. Res.

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Improving the fire-resistant efficiency of silicone-based polymeric coatings is important in the building industry and electrical utilities. In this study, the water-containing hybrid calcium carbonate (CaCO3)–silica (SiO2) colloidal capsule has been developed and optimized as an inorganic flame-retardant additive. This capsule exhibits excellent thermal stability up to 1000 °C with a remaining intact hollow spherical structure. When used as an inorganic filler at 15 wt %, it not only reduces the potential fire hazards by over 44% (i.e., the sumHRC reduced from 112.00 J/g K to 62.00 J/g K) but also improves the heat-barrier efficiency by over 30% (i.e., the temperature at the steady state reduced from 350 to 360 °C to below 250 °C) of the silicone-based polymeric coatings. In addition, the capsule–polymer composite coating exhibits excellent ductility which can withstand heat-induced mechanical stresses and prevent crack propagation under radiative heating conditions. The fire-resistant mechanism of the colloidal capsule is related strongly to the encapsulated water core and the reactions between SiO2 and CaCO3 at elevated temperatures. They not only contribute to a cooling effect on the flammable pyrolysis gases but also induce the insulative effect to the resulted char during combustion. The significant advances in this study will have a high impact in customizing the functional inorganic additives for a better design of the flame-retardant composite coating.

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Section: Resultsmentioning

confidence: 99%