TY - JOUR
T1 - Hollow Nanospheres of Red Phosphorus for Fireproof Flexible Sensors Fabricated via 3D Printing
AU - Song, Kunpeng
AU - Li, Qiushi
AU - Yuan, Yongshuai
AU - Hu, Shizun
AU - Liu, Jin
AU - Zhang, Yan
AU - Pan, Ye Tang
AU - Zhao, Wei
AU - He, Jiyu
N1 - Publisher Copyright:
© 2022 American Chemical Society. All rights reserved.
PY - 2022/12/23
Y1 - 2022/12/23
N2 - 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.
AB - 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.
KW - 3D printing
KW - fireproof pressure sensor
KW - flame-retardant property
KW - multifunctional composites
KW - red phosphorous hollow nanospheres
UR - http://www.scopus.com/inward/record.url?scp=85143065880&partnerID=8YFLogxK
U2 - 10.1021/acsanm.2c04019
DO - 10.1021/acsanm.2c04019
M3 - Article
AN - SCOPUS:85143065880
SN - 2574-0970
VL - 5
SP - 18080
EP - 18092
JO - ACS Applied Nano Materials
JF - ACS Applied Nano Materials
IS - 12
ER -