Work

Amidoxime-functionalized covalent organic framework for enhanced thermal decomposition of ammonium perchlorate

Year: 2025

Type: article

Abstract: The design of catalysts with consistent surface properties, controllable structures and efficient performance for thermal decomposition of ammonium perchlorate (AP) has been a challenge in the development of composite solid propellants. In this work, covalent organic frameworks (COFs) with the desired designability and functionality were introduced as catalyst in thermal decomposition of AP for the first time. We reported a dioxin‐linked two-dimension (2D) COF (COF-316) with excellent thermal and chemical stability, and COF-316-AO (COF-316-C(NOH)NH2) was obtained by a post-modification strategy through the amidoximation of nitrile in 1D channels. Both COF-316 and COF-316-AO exhibited catalytic activity for the thermal decomposition of AP, which reduced the decomposition temperature of AP by 50 °C and 22 °C, respectively, demonstrating the positive effect of COFs. The pre-engineered COFs possessed abundant coordination active sites of Cu 2+ , and the introduction of uniformly coordinated Cu 2+ to COFs (denoted as Cu-COF-316 and Cu-COF-316-AO) further enhanced the catalytic performance of the material. Cu-COF-316-AO with a higher Cu 2+ loading amount displayed the admirable catalytic effect, it reduced the decomposition temperature from 448 to 325°C and increased heat release by 1.7 times compared to pure AP, which confirmed that the abundance of coordinated Cu 2+ is proportional to catalysis the thermal decomposition of AP, indicating that the design of COFs can tune the catalytic decomposition effect of AP. This work introduced well-structured and easily functionalized COFs into AP decomposition, paving a pathway for research development of tunable AP decomposition catalytic materials.

Source: FirePhysChem

DOI: 10.1016/j.fpc.2025.12.003

Authors: Zhengwu Dong, Qian Wang, Deyang Chen, Jianbing Xu, Yinghua Ye, Ruiqi Shen

Institution: Nanjing University of Science and Technology

Language: English

Topic: Energetic Materials and Combustion

Subfield: Mechanics of Materials

Field: Engineering

Domain: Physical Sciences

Open Access status: diamond

Funders: National Natural Science Foundation of China, National University's Basic Research Foundation of China, Fundamental Research Funds for the Central Universities

Awards: G7442964525, G7739665397, G8833190387