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Multifunctional Fluorine-Rich
Ion-Conductive Elastomer
for Combustion-Enhanced Energetic Composites
Hongxia Zhang (164388)
Xiaohong Yan (176496)
Jiechao Wang (25135860)
Shimin Zhang (65419)
Xiaoying Cheng (6937118)
Fan Liao (1457596)
Chongwei An (4837785)
Pharmacology
Chemical Sciences not elsewhere classified
Biological Sciences not elsewhere classified
Developmental Biology
suppressed aluminum nanoparticles
sup >+</ sup
infrared thermography revealed
elucidated via ft
alumina passivation shell
517 × 10
05 mj ·
three elastomer systems
litfsi molar ratio
favorable comprehensive performance
thermally activated self
enhanced combustion performance
electrostatic safety relative
23 ± 0
pegda </ sub
50 </ sub
10 </ sub
vfsoil </ sub
2 </ sub
80 ° c
rich binder lif
electrostatic safety
vfsoil ),
litfsi ).
favorable hydrophobicity
conductive elastomer
rich ion
work presents
systematically investigated
speed photography
resulting lif
namely lif
lithium bis
ir spectroscopy
hexafluorobutyl acrylate
healing capability
Achieving a balanced combination
of ultra-stretchability,
electrostatic
safety, self-healing capability, and enhanced combustion performance
in polymer-bonded explosives (PBXs) remains a critical challenge.
Herein, we report a series of fluorine-rich ion-conductive elastomers
(ICEs) derived from a polymerizable deep eutectic solvent (PDES) composed
of 2,2,3,4,4,4-hexafluorobutyl acrylate (HFBA) and lithium bis(trifluoromethanesulfonyl)imide
(LiTFSI). The formation mechanism of the PDES(HFBA<sub>2</sub>-LiTFSI)
system was elucidated via FT-IR spectroscopy, revealing that the carbonyl
groups of HFBA participate in Li<sup>+</sup> solvation, and a homogeneous
PDES is formed at an HFBA:LiTFSI molar ratio of 2:1. Three elastomer
systems, namely LiF<sub>2</sub>C<sub>No</sub>, LiF<sub>2</sub>C<sub>PEGDA</sub> and LiF<sub>2</sub>C<sub>VFSoil</sub> were systematically
investigated. By introducing a fluorosiloxane crosslinker (VFSoil),
the resulting LiF<sub>2</sub>C<sub>VFSoil</sub> exhibited the most
favorable comprehensive performance with toughness of 23.23±0.05
MJ·m<sup>–3</sup>, ionic conductivity of 7.517×10<sup>–5</sup> S/m, thermally activated self-healing capability,
and favorable hydrophobicity. When applied as a binder for cyclotetramethylenetetranitramine
(HMX, octogen)-based composites, the H<sub>50</sub>(LiF<sub>2</sub>C<sub>VFSoil</sub>)<sub>50</sub> formulation maintained excellent
stretchability with an elongation at break of 578.12% and exhibited
thermally activated self-healing capability at 80 °C. Furthermore,
the H<sub>90</sub>(LiF<sub>2</sub>C<sub>VFSoil</sub>)<sub>10</sub> formulation improved both the mechanical and electrostatic safety
relative to pristine HMX. Moreover, high-speed photography and infrared
thermography revealed that the fluorine-rich binder LiF<sub>2</sub>C<sub>VFSoil</sub> effectively disrupted the alumina passivation
shell, suppressed aluminum nanoparticles (nano-Al) agglomeration,
and delivered superior combustion uniformity and sustained high flame
temperatures in aluminized formulations. This work presents a promising
molecular design platform for developing next-generation PBXs featuring
ultra-stretchability, thermally activated self-healing capability,
and enhanced combustion performance.
2026-09-29T00:00:00Z
Text
Journal contribution
10.1021/acsapm.6c03181.s001
https://figshare.com/articles/journal_contribution/Multifunctional_Fluorine-Rich_Ion-Conductive_Elastomer_for_Combustion-Enhanced_Energetic_Composites/34021791
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