Reactivity passivation of red phosphorus with thin plasma-deposited carbon coating

Kinsley, Paige C.; Zeng, Aiping; Orbeck, Jenny K. Hedlund; Debow, Shaun; Zander, Zachary; Heaney, Patrick J.; Hamers, Robert J.

doi:10.1016/j.apsusc.2022.152791

Cited by 1 publication

(1 citation statement)

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“…The presence of RPHNs facilitates the formation of a partially connected protective charring barrier and also acts as a gaseous phase flame retardant. The large number of spherical particles observed on the external surface of the char residue is attributed to the conversion of RPHNs to phosphoric and polyphosphoric acids during combustion promoting dehydration and charring of the polymer chains. , …”

Section: Resultsmentioning

confidence: 99%

Hollow Nanospheres of Red Phosphorus for Fireproof Flexible Sensors Fabricated via 3D Printing

Song

Yuan

et al. 2022

ACS Appl. Nano Mater.

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High-power and high-temperature applications have brought increased demand for electrical sensing systems; however, conventional sensors have often been designed without consideration for stability in extreme environments (e.g., fire). Red phosphorus (RP) is a highly effective commercial flame retardant; however, its sensitive properties and large size predispose it to spontaneous combustion during shearing and make it difficult to combine with direct inkjet writing technology carrying micron-sized pinholes to fabricate sophisticated sensor devices. Here, bulk commercial red phosphorus (C-RP) is converted into red phosphorous hollow nanospheres (RPHNs). The ingeniously designed nanostructure effectively circumvents the flammability of C-RP extrusion processes and the risk of clogging the printing needle, and a fireproof pressure-sensitive sensor has been successfully fabricated. A load of RPHNs into a sensor matrix improves the moldability and fire safety properties. And with the assistance of the rapid charring mechanism, the peak of the heat release rate of the fireproof pressure-sensitive sensor is reduced by 58.9% compared to the pure matrix and withstands seven 2-s repetitive ignitions, thus allowing the sensor to respond continuously to flame stimulation. This work provides a broad perspective on the design of fireproof sensors and the application of red phosphorus hollow nanospheres.

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Section: Resultsmentioning

confidence: 99%