Preparation of Polydopamine Functionalized HNIW Crystals and Application in Solid Propellants

Polymers, Год журнала: 2024, Номер 16(11), С. 1566 - 1566

Опубликована: Июнь 1, 2024

The application of hexanitrohexaazaisowurtzitane (HNIW) as an oxidizer in solid propellants aligns with the pursuit high-energy materials. However, phase transformation behavior and high impact sensitivity HNIW are its limitations. Due to strong adhesion mild synthesis conditions, polydopamine (PDA) has been employed modify HNIW. method suffers from a slow coating process non-ideal effect under short reaction time. Herein, oxygen-accelerated dopamine situ polymerization was developed. It found that oxygen not only reduced time but also contributed forming dense uniform PDA layer. HNIW@PDA coated for 6 h exhibited most favorable performance, delay 20.8 °C transition temperature reduction 145.45% sensitivity. -OH groups on surface enhanced interaction between polymer binders, resulting 20.36% dewetting percentage. lower content (1.17%) resulted minimal variation heat explosion HNIW@PDA-based HTPB propellant (6287 kJ/kg) comparison HNIW-based (6297 kJ/kg). Hence, expected offer alternative promising safety mechanical performance compared existing propellants, thus facilitating propellants. This work presents low-cost efficiently inhibiting polycrystalline explosives reducing offers potential approach enhance interfacial nitro-containing binders.

Язык: Английский

Exploration of the Application of ADN in Composite Explosives

FirePhysChem, Год журнала: 2024, Номер unknown

Опубликована: Дек. 1, 2024

Язык: Английский