Preparation and characterization of core-shell Al@PFHP with improving the combustion and ignition properties of aluminum powder

Lichen Zhang; Shuo Wang; Xing Su; Xiaodong Li; Meishuai Zou

doi:10.1016/j.partic.2022.08.008

Preparation and characterization of core-shell Al@PFHP with improving the combustion and ignition properties of aluminum powder

Lichen Zhang, Shuo Wang, Xing Su, Xiaodong Li^*, Meishuai Zou^*

^*Corresponding author for this work

School of Material Science and Engineering

Beijing Institute of Technology

Research output: Contribution to journal › Article › peer-review

16 Citations (Scopus)

Abstract

The dense alumina shell on the surface of aluminum powder will hinder the combustion of aluminum powder and increase its ignition temperature. In this study, the aluminum oxide shell layer on the surface of aluminum powder was removed with hydrofluoric acid by one-pot method, and 3-Perfluorohexyl-1, 2-epoxypropane (PFHP) (F₃C(CF₂)₅CH₂C₂H₃O) was coated to form a uniform and controllable core-shell Al@PFHP. The core-shell Al@PFHP showed better thermal reaction and ignition performance. The exothermic enthalpy of Al@0.15 PFHP was increased by about 1.9 times, with lower ignition temperature (reduced by about 140 °C) and longer burning duration (increased by about 1.5 times) after coating with PFHP, compared with raw aluminum powder. In addition, the formation of PFHP coating shell can effectively improve the hydrophobicity and corrosion resistance of aluminum powder.

Original language	English
Pages (from-to)	62-70
Number of pages	9
Journal	Particuology
Volume	77
DOIs	https://doi.org/10.1016/j.partic.2022.08.008
Publication status	Published - Jun 2023

Keywords

2-Epoxypropane
3-Perfluorohexyl-1
Aluminum powder
Combustion
Core-shell

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title = "Preparation and characterization of core-shell Al@PFHP with improving the combustion and ignition properties of aluminum powder",

abstract = "The dense alumina shell on the surface of aluminum powder will hinder the combustion of aluminum powder and increase its ignition temperature. In this study, the aluminum oxide shell layer on the surface of aluminum powder was removed with hydrofluoric acid by one-pot method, and 3-Perfluorohexyl-1, 2-epoxypropane (PFHP) (F3C(CF2)5CH2C2H3O) was coated to form a uniform and controllable core-shell Al@PFHP. The core-shell Al@PFHP showed better thermal reaction and ignition performance. The exothermic enthalpy of Al@0.15 PFHP was increased by about 1.9 times, with lower ignition temperature (reduced by about 140 °C) and longer burning duration (increased by about 1.5 times) after coating with PFHP, compared with raw aluminum powder. In addition, the formation of PFHP coating shell can effectively improve the hydrophobicity and corrosion resistance of aluminum powder.",

keywords = "2-Epoxypropane, 3-Perfluorohexyl-1, Aluminum powder, Combustion, Core-shell",

author = "Lichen Zhang and Shuo Wang and Xing Su and Xiaodong Li and Meishuai Zou",

note = "Publisher Copyright: {\textcopyright} 2022",

year = "2023",

month = jun,

doi = "10.1016/j.partic.2022.08.008",

language = "English",

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journal = "Particuology",

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T1 - Preparation and characterization of core-shell Al@PFHP with improving the combustion and ignition properties of aluminum powder

AU - Zhang, Lichen

AU - Wang, Shuo

AU - Su, Xing

AU - Li, Xiaodong

AU - Zou, Meishuai

PY - 2023/6

Y1 - 2023/6

N2 - The dense alumina shell on the surface of aluminum powder will hinder the combustion of aluminum powder and increase its ignition temperature. In this study, the aluminum oxide shell layer on the surface of aluminum powder was removed with hydrofluoric acid by one-pot method, and 3-Perfluorohexyl-1, 2-epoxypropane (PFHP) (F3C(CF2)5CH2C2H3O) was coated to form a uniform and controllable core-shell Al@PFHP. The core-shell Al@PFHP showed better thermal reaction and ignition performance. The exothermic enthalpy of Al@0.15 PFHP was increased by about 1.9 times, with lower ignition temperature (reduced by about 140 °C) and longer burning duration (increased by about 1.5 times) after coating with PFHP, compared with raw aluminum powder. In addition, the formation of PFHP coating shell can effectively improve the hydrophobicity and corrosion resistance of aluminum powder.

AB - The dense alumina shell on the surface of aluminum powder will hinder the combustion of aluminum powder and increase its ignition temperature. In this study, the aluminum oxide shell layer on the surface of aluminum powder was removed with hydrofluoric acid by one-pot method, and 3-Perfluorohexyl-1, 2-epoxypropane (PFHP) (F3C(CF2)5CH2C2H3O) was coated to form a uniform and controllable core-shell Al@PFHP. The core-shell Al@PFHP showed better thermal reaction and ignition performance. The exothermic enthalpy of Al@0.15 PFHP was increased by about 1.9 times, with lower ignition temperature (reduced by about 140 °C) and longer burning duration (increased by about 1.5 times) after coating with PFHP, compared with raw aluminum powder. In addition, the formation of PFHP coating shell can effectively improve the hydrophobicity and corrosion resistance of aluminum powder.

KW - 2-Epoxypropane

KW - 3-Perfluorohexyl-1

KW - Aluminum powder

KW - Combustion

KW - Core-shell

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U2 - 10.1016/j.partic.2022.08.008

DO - 10.1016/j.partic.2022.08.008

M3 - Article

AN - SCOPUS:85141527649

SN - 1674-2001

VL - 77

SP - 62

EP - 70

JO - Particuology

JF - Particuology

ER -

Preparation and characterization of core-shell Al@PFHP with improving the combustion and ignition properties of aluminum powder

Abstract

Keywords

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