Direct Writing of a 90 wt% Particle Loading Nanothermite

• DOI: 10.1002/adma.201806575
• Publication Date: 2019-04-17T06:05:53Z
• Authors: Haiyang Wang; Jinpeng Shen; Dylan J. Kline; Noah Eckman; Niti R. Agrawal; Tao Wu; Peng Wang; Michael R. Zachariah
• Keywords: Shear thinning; Particle (ecology)

The additive manufacturing of energetic materials has received worldwide attention. Here, an ink formulation is developed with only 10 wt% polymers, which can bind a 90 nanothermite using simple direct-writing approach. key in the hybrid polymer poly(vinylidene fluoride) (PVDF) and hydroxy propyl methyl cellulose (HPMC) former serves as initiator binder, latter thickening agent other form gel. rheological shear-thinning properties are critical to making at such high loadings printable. Young's modulus printed stick found compare favorably that poly(tetrafluoroethylene) (PTFE), particle packing density theoretical maximum. linear burn rate, mass flame temperature, heat flux be easily adjusted by varying fuel/oxidizer ratio. average temperatures ≈2800 K near-complete combustion being evident upon examination postcombustion products.