Fabrication of CL-20/HMX Cocrystal@Melamine–Formaldehyde Resin Core–Shell Composites Featuring Enhanced Thermal and Safety Performance via In Situ Polymerization

International Journal of Molecular Sciences, Journal Year: 2022, Volume and Issue: 23(12), P. 6710 - 6710

Published: June 16, 2022

Safety concerns remain a bottleneck for the application of 2,4,6,8,10,12-hexanitro- 2,4,6,8,10,12-hexaazaisowurtzitane (CL-20)/1,3,5,7-tetranitro-1,3,5,7-tetrazacyclooctane (HMX) cocrystal. Melamine-formaldehyde (MF) resin was chosen to fabricate CL-20/HMX cocrystal-based core-shell composites (CH@MF composites) via facile in situ polymerization method. The resulted CH@MF were comprehensively characterized, and compact structure confirmed. effects shell content on properties explored as well. As result, we found that, except CH@MF-2 with 1% content, increase led rougher surface morphology more close-packed structure. thermal decomposition peak temperature improved by 5.3 °C cocrystal enabled 1.0 wt% MF resin. Regarding sensitivity, exhibited significantly reduced impact friction sensitivity negligible energy loss compared raw physical mixtures due cushioning insulation coating. formation mechanism micro-composites further clarified. Overall, this work provides green, industrially potential strategy desensitization energetic cocrystals. high stability low are promising be applied propellants polymer-bonded explosive (PBX) formulations.

Language: Английский

---

Enhancement strategy of mechanical property by constructing of energetic RDX@CNFs composites in propellants, and investigation on its combustion and sensitivity behavior

Combustion and Flame, Journal Year: 2022, Volume and Issue: 244, P. 112249 - 112249

Published: June 21, 2022

Language: Английский

---

Polymorphism of CL-20 and the Modification and Inhibition Strategies for Its Crystal Transformation

Crystal Growth & Design, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 24, 2024

Language: Английский

---

A new insight into the energetic co-agglomerate structures of attractive nitramines

Chemical Engineering Journal, Journal Year: 2021, Volume and Issue: 420, P. 130472 - 130472

Published: May 25, 2021

Language: Английский

---

Continuous, safe and large-scale preparation of insensitive high-energy TATB/HMX composite particles by microfluidic self-assembly technology

Chemical Engineering Science, Journal Year: 2022, Volume and Issue: 264, P. 118160 - 118160

Published: Oct. 5, 2022

Language: Английский

---

Unraveling the Atypical Cocrystal Transformation Process and Mechanism of Cl-20 and Hmx in Solid Propellant Formulations

Published: Jan. 1, 2025

Language: Английский

---

Unraveling the Atypical Co-crystal Transformation Process and Mechanism of CL-20 and HMX in Solid Propellant Formulations

Journal of Materials Research and Technology, Journal Year: 2025, Volume and Issue: unknown

Published: May 1, 2025

Language: Английский

---

Energetic host–guest inclusion compounds: an effective design paradigm for high-energy materials

CrystEngComm, Journal Year: 2022, Volume and Issue: 24(20), P. 3667 - 3674

Published: Jan. 1, 2022

Due to the stringent requirements of performance, safety, and cost for development new energetic materials (EMs), synthesis host–guest inclusion compounds is an attractive way fully exploit application potential existing EMs.

Language: Английский

---

Interfacial engineered RDX/TATB energetic co-particles for enhanced safety performance and thermal stability

Dalton Transactions, Journal Year: 2022, Volume and Issue: 51(27), P. 10527 - 10534

Published: Jan. 1, 2022

1,3,5-Trinitro-1,3,5-triazinane (RDX) has attracted considerable attention in energy-related fields. However, the safety performance of RDX needs to be improved terms various external stimuli. Herein, such issues could well balanced through hydrothermal assembly with assistance insensitive 1,3,5-triamino-2,4,6-trinitrobenzene (TATB) a low content 10 wt% (named RT co-particles). The TATB spread outside and were embedded inside resultant co-particles, which examined via X-ray computed tomography three-dimensional laser scanning confocal microscope. As result, impact co-particles drastically enhanced 17.5 J by lubricant effect, demonstrating over twice value that raw (6 J) mixtures (7 J). Moreover, an interfacial reconstruction between was witnessed due strong interaction, as theoretical simulation. Inspired this, delayed exothermic decomposition temperature (244.4 °C) been achieved when compared (241.4 °C). demonstrated, energetic co-particle strategy may provide effective pathway toward remarkably mechanical thermal performance, shedding light on other materials.

Language: Английский

---

Isothermal structural evolution of CL-20/HMX cocrystals under slow roasting at 190 °C

Physical Chemistry Chemical Physics, Journal Year: 2023, Volume and Issue: 25(23), P. 15756 - 15766

Published: Jan. 1, 2023

As a new type of energetic material, cocrystal explosives demonstrate many excellent properties, such as high energy density and low sensitivity, due to the interaction between molecules two components. The known decomposition temperature is 235 °C for CL-20/HMX cocrystals at faster heating rate. CL-20 could separate from matrix decompose higher temperature, much lower than temperature. current work provided deep insight into isothermal structural evolution with slow roasting 190 °C. We found that initial originates separating surface along (010) plane cocrystals. gas products, NO2 NO, escape largest exposed generates microbubbles microholes. At same time, residual HMX form δ-phase crystals shrink volume by 72%. By increasing time held °C, recrystallization gully-like structure on cocrystal. After long component completely decomposes, all recrystallize in δ-HMX form. makes rate slower pure crystal similar activation during heating. This can help deeply understand safety recognized

Language: Английский

---