TY - JOUR
T1 - Covering effect, size-fractionated, and stability of dry water with seawater@nano-SiO2
T2 - Electrochemical methods
AU - Tianwei, Zhang
AU - Hao, Liu
AU - Han, Zhiyue
AU - Zhiming, Du
AU - Cunwei, Zhang
AU - Liya, Shan
AU - Yong, Wang
AU - Guiyun, Zhang
AU - Gaofeng, Wang
N1 - Publisher Copyright:
© 2022 Elsevier B.V.
PY - 2022/12/1
Y1 - 2022/12/1
N2 - The seawater dry water extinguishing materials formed by coating seawater with nano-SiO2 have greatly enlarged the application space of the seawater as a fire-extinguishing medium. Against the deficiencies in the evaluation of the size-fractionated and stability of dry water extinguishing materials, especially of the coating effect of nano-SiO2, this study designed an airflow size-fractionated system applicable to dry water materials and characterized the stability of dry water materials by electrochemical methods according to the pneumatic separation principle. The results showed that the grain size range of seawater@nano-SiO2 dry water extinguishing materials was 0.2–400 μm, and that the dry water could be divided into three intervals by granule size by adjusting the turbo-dynamo frequency and draught fan frequency of the airflow size-fractionated system. The electrochemical methods are applicable to describe the stability of the dry water extinguishing materials, and the gelatinization of core material can significantly make up for the deficiency that the core material of dry water tends to separate out over storage time. However, the stability of dry water is subject to granule size more than the gelatinization of the core material, and the dry water with big-size granules has optimal stability. Graded dry water is less corrosive to aluminum sheets, and the corrosion resistance to big-grained gel-dry water is optimal. The research conclusion can provide a technical basis for size-fractionated and covering effect characterization of dry water extinguishing materials and for type selection of storage media.
AB - The seawater dry water extinguishing materials formed by coating seawater with nano-SiO2 have greatly enlarged the application space of the seawater as a fire-extinguishing medium. Against the deficiencies in the evaluation of the size-fractionated and stability of dry water extinguishing materials, especially of the coating effect of nano-SiO2, this study designed an airflow size-fractionated system applicable to dry water materials and characterized the stability of dry water materials by electrochemical methods according to the pneumatic separation principle. The results showed that the grain size range of seawater@nano-SiO2 dry water extinguishing materials was 0.2–400 μm, and that the dry water could be divided into three intervals by granule size by adjusting the turbo-dynamo frequency and draught fan frequency of the airflow size-fractionated system. The electrochemical methods are applicable to describe the stability of the dry water extinguishing materials, and the gelatinization of core material can significantly make up for the deficiency that the core material of dry water tends to separate out over storage time. However, the stability of dry water is subject to granule size more than the gelatinization of the core material, and the dry water with big-size granules has optimal stability. Graded dry water is less corrosive to aluminum sheets, and the corrosion resistance to big-grained gel-dry water is optimal. The research conclusion can provide a technical basis for size-fractionated and covering effect characterization of dry water extinguishing materials and for type selection of storage media.
KW - Airflow size-fractionated
KW - Core-shell structure
KW - Dry water
KW - Electrochemical methods
KW - Granule size
KW - Seawater
UR - http://www.scopus.com/inward/record.url?scp=85138475413&partnerID=8YFLogxK
U2 - 10.1016/j.matchemphys.2022.126777
DO - 10.1016/j.matchemphys.2022.126777
M3 - Article
AN - SCOPUS:85138475413
SN - 0254-0584
VL - 292
JO - Materials Chemistry and Physics
JF - Materials Chemistry and Physics
M1 - 126777
ER -