Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 10, Issue 38, Pages 32849-32858Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.8b10197
Keywords
polydopamine; reactivity; sensitivity; n-Al/PTFE; MICs
Funding
- National Natural Science Foundation of China [51776176]
- Fundamental Research Funds for the Central Universities [G2017KY0301]
- Thousand Youth Talents Plan from Chinese government [17GH030127]
Ask authors/readers for more resources
The metastable intermixed composite (MIC) is one of the most popular research topics in the field of energetic materials (EMs). The goal is to invent EMs with tunable reactivity and desired energy content. However, it is very difficult to tune the reactivity of MIC due to its high reactivity and sensitivity caused by enlarged specific surface area and intimate contact between the oxidizers and fuels. Herein, we demonstrated a facile fabrication method that can be used to control the reactivity between the nanoaluminum (n-Al) and poly(tetrafluoroethylene) (PTFE) using an in situ-synthesized polydopamine (PDA) binding layer. It was found that PDA can adhere to both n-Al and PTFE particles, resulting in integrated n-Al@PDA/PTFE MICs. In comparison with traditional n-Al/PTFE MICs, the n-Al@PDA/PTFE showed an increased energy release and reduced sensitivity and more importantly tunable reactivity. By regulating the experimental conditions of coating, the thickness of PDA could be well controlled, which makes the tunable reactivity of n-Al@PDA/PTFE possible. The PDA interfacial layer may increase the preignition reaction (PIR) heat of Al2O3/PTFE and therefore the overall reaction heat of n-Al/PTFE. It also reveals that the PDA interfacial layer postponed the PIR, leading to an increase in onset thermal decomposition temperature (T-omicron). As T-omicron increased, a more complete reaction between PTFE and Al nanoparticles could be achieved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available